# admin_routes.py – AZA Admin Control Panel v2 (internal JSON endpoints)
#
# All endpoints require X-Admin-Token header matching AZA_ADMIN_TOKEN env var.
# This router is mounted with prefix="/admin" in backend_main.py.
#
# v1 endpoints: system_status, licenses_overview, backup_status, billing_overview
# v2 endpoints: license_customer_map, revenue_overview, alerts, dashboard_summary

from __future__ import annotations

import calendar
import csv
import io
import json
import os
import shutil
import sqlite3
import time
from datetime import datetime, timezone
from pathlib import Path
from typing import Any, Dict, List, Optional

from fastapi import APIRouter, Depends, Query
from fastapi.responses import JSONResponse, Response

from aza_security import require_admin_token

router = APIRouter(tags=["admin"], dependencies=[Depends(require_admin_token)])

_BASE_DIR = Path(__file__).resolve().parent
_START_TIME = time.time()

_BACKUP_PATHS = [
    Path("/host_backups"),
    Path("/root/aza-backups"),
    Path("/root/aza-backups/daily"),
    Path("/var/backups/aza"),
]
_BACKUP_LOG_PATHS = [
    Path("/host_backups/backup.log"),
    Path("/root/aza-backups/backup.log"),
    Path("/var/log/aza-backup.log"),
]

_LOOKUP_KEY_PRICES_CHF: Dict[str, int] = {
    "aza_basic_monthly": 59_00,
    "aza_basic_yearly": 590_00,
    "aza_team_monthly": 89_00,
    "aza_team_yearly": 890_00,
}


def _stripe_db_path() -> Path:
    return Path(os.environ.get(
        "STRIPE_DB_PATH",
        str(_BASE_DIR / "data" / "stripe_webhook.sqlite"),
    ))


def _events_log_path() -> Path:
    return Path(os.environ.get(
        "STRIPE_EVENTS_LOG",
        str(_BASE_DIR / "data" / "stripe_events.log.jsonl"),
    ))


def _disk_usage() -> Dict[str, Any]:
    try:
        usage = shutil.disk_usage("/")
        total_gb = round(usage.total / (1024 ** 3), 2)
        used_gb = round(usage.used / (1024 ** 3), 2)
        free_gb = round(usage.free / (1024 ** 3), 2)
        used_pct = round((usage.used / usage.total) * 100, 1) if usage.total else 0
        return {
            "total_gb": total_gb,
            "used_gb": used_gb,
            "free_gb": free_gb,
            "used_percent": used_pct,
        }
    except Exception as e:
        return {"error": str(e)}


def _safe_db_connect(db_path: Path):
    if not db_path.exists():
        return None
    return sqlite3.connect(str(db_path))


def _stripe_env_ok() -> bool:
    return (
        bool(os.environ.get("STRIPE_SECRET_KEY", "").strip())
        and bool(os.environ.get("STRIPE_WEBHOOK_SECRET", "").strip())
    )


def _newest_backup_info() -> Dict[str, Any]:
    """Scan all backup paths and return info about the most recent backup."""
    best: Dict[str, Any] = {"found": False}
    best_mtime = 0.0
    for bp in _BACKUP_PATHS:
        if not bp.exists() or not bp.is_dir():
            continue
        try:
            for entry in bp.iterdir():
                if not entry.is_dir():
                    continue
                mt = entry.stat().st_mtime
                if mt > best_mtime:
                    best_mtime = mt
                    age_h = round((time.time() - mt) / 3600, 1)
                    best = {
                        "found": True,
                        "path": str(bp),
                        "name": entry.name,
                        "time_utc": datetime.fromtimestamp(mt, tz=timezone.utc).isoformat(),
                        "age_hours": age_h,
                        "age_days": round(age_h / 24, 1),
                    }
        except Exception:
            continue
    return best


def _license_counts() -> Dict[str, int]:
    """Return {status: count} from licenses table."""
    db_path = _stripe_db_path()
    if not db_path.exists():
        return {}
    try:
        con = sqlite3.connect(str(db_path))
        rows = con.execute(
            "SELECT status, COUNT(*) FROM licenses GROUP BY status"
        ).fetchall()
        con.close()
        return {r[0]: r[1] for r in rows}
    except Exception:
        return {}


# ═══════════════════════════════════════════════════════════════════════════════
# v1 ENDPOINTS (unchanged)
# ═══════════════════════════════════════════════════════════════════════════════

# ---------------------------------------------------------------------------
# 1. GET /admin/system_status
# ---------------------------------------------------------------------------
@router.get("/system_status")
def system_status() -> Dict[str, Any]:
    now = datetime.now(timezone.utc)
    uptime_s = int(time.time() - _START_TIME)

    stripe_health: Dict[str, Any] = {"ok": False, "detail": "not_checked"}
    stripe_key_set = bool(os.environ.get("STRIPE_SECRET_KEY", "").strip())
    stripe_webhook_set = bool(os.environ.get("STRIPE_WEBHOOK_SECRET", "").strip())
    if stripe_key_set and stripe_webhook_set:
        stripe_health = {"ok": True, "detail": "env_configured"}
    elif not stripe_key_set:
        stripe_health = {"ok": False, "detail": "STRIPE_SECRET_KEY missing"}
    elif not stripe_webhook_set:
        stripe_health = {"ok": False, "detail": "STRIPE_WEBHOOK_SECRET missing"}

    db_path = _stripe_db_path()
    db_exists = db_path.exists()
    db_size_kb = round(db_path.stat().st_size / 1024, 1) if db_exists else None

    return {
        "status": "ok",
        "timestamp_utc": now.isoformat(),
        "uptime_seconds": uptime_s,
        "disk": _disk_usage(),
        "stripe": stripe_health,
        "database": {
            "path": str(db_path),
            "exists": db_exists,
            "size_kb": db_size_kb,
        },
        "python_pid": os.getpid(),
    }


# ---------------------------------------------------------------------------
# 2. GET /admin/licenses_overview
# ---------------------------------------------------------------------------
@router.get("/licenses_overview")
def licenses_overview(email: Optional[str] = None) -> Dict[str, Any]:
    db_path = _stripe_db_path()
    if not db_path.exists():
        return {
            "status": "no_database",
            "db_path": str(db_path),
            "counts_by_status": {},
            "total": 0,
            "recent": [],
        }

    try:
        con = sqlite3.connect(str(db_path))
        con.row_factory = sqlite3.Row

        rows = con.execute(
            "SELECT status, COUNT(*) as cnt FROM licenses GROUP BY status"
        ).fetchall()
        counts = {r["status"]: r["cnt"] for r in rows}
        total = sum(counts.values())

        if email:
            email_clean = email.strip().lower()
            recent_rows = con.execute(
                """SELECT * FROM licenses
                   WHERE lower(customer_email) = ?
                   ORDER BY updated_at DESC LIMIT 20""",
                (email_clean,),
            ).fetchall()
        else:
            recent_rows = con.execute(
                "SELECT * FROM licenses ORDER BY updated_at DESC LIMIT 20"
            ).fetchall()

        recent = [dict(r) for r in recent_rows]
        con.close()

        return {
            "status": "ok",
            "counts_by_status": counts,
            "total": total,
            "recent": recent,
            "filter_email": email or None,
        }
    except Exception as e:
        return {"status": "error", "error": str(e)}


# ---------------------------------------------------------------------------
# 3. GET /admin/backup_status
# ---------------------------------------------------------------------------
@router.get("/backup_status")
def backup_status() -> Dict[str, Any]:
    result: Dict[str, Any] = {
        "disk": _disk_usage(),
        "backup_locations": [],
        "backup_log": None,
    }

    for bp in _BACKUP_PATHS:
        entry: Dict[str, Any] = {"path": str(bp), "exists": bp.exists()}
        if bp.exists() and bp.is_dir():
            try:
                items = sorted(bp.iterdir(), key=lambda p: p.stat().st_mtime, reverse=True)
                dirs = [d for d in items if d.is_dir()]
                all_files = list(bp.rglob("*"))
                total_size = sum(f.stat().st_size for f in all_files if f.is_file())

                entry["folder_count"] = len(dirs)
                entry["file_count"] = len([f for f in all_files if f.is_file()])
                entry["total_size_mb"] = round(total_size / (1024 ** 2), 2)
                if dirs:
                    newest = dirs[0]
                    mtime = newest.stat().st_mtime
                    entry["newest_backup"] = newest.name
                    entry["newest_backup_time_utc"] = datetime.fromtimestamp(
                        mtime, tz=timezone.utc
                    ).isoformat()
                    entry["newest_backup_age_hours"] = round(
                        (time.time() - mtime) / 3600, 1
                    )
            except Exception as e:
                entry["error"] = str(e)
        result["backup_locations"].append(entry)

    for lp in _BACKUP_LOG_PATHS:
        if lp.exists() and lp.is_file():
            try:
                text = lp.read_text(encoding="utf-8", errors="replace")
                lines = text.strip().splitlines()
                tail = lines[-20:] if len(lines) > 20 else lines
                result["backup_log"] = {
                    "path": str(lp),
                    "total_lines": len(lines),
                    "last_lines": tail,
                }
            except Exception as e:
                result["backup_log"] = {"path": str(lp), "error": str(e)}
            break

    if result["backup_log"] is None:
        result["backup_log"] = {"status": "not_found", "searched": [str(p) for p in _BACKUP_LOG_PATHS]}

    return result


# ---------------------------------------------------------------------------
# 4. GET /admin/billing_overview
# ---------------------------------------------------------------------------
@router.get("/billing_overview")
def billing_overview() -> Dict[str, Any]:
    stripe_key_set = bool(os.environ.get("STRIPE_SECRET_KEY", "").strip())
    stripe_webhook_set = bool(os.environ.get("STRIPE_WEBHOOK_SECRET", "").strip())
    stripe_ok = stripe_key_set and stripe_webhook_set

    db_path = _stripe_db_path()
    events_path = _events_log_path()

    db_info: Dict[str, Any] = {"exists": db_path.exists()}
    licenses_summary: List[Dict[str, Any]] = []
    events_info: Dict[str, Any] = {"exists": events_path.exists()}

    if db_path.exists():
        try:
            con = sqlite3.connect(str(db_path))
            con.row_factory = sqlite3.Row
            db_info["size_kb"] = round(db_path.stat().st_size / 1024, 1)

            rows = con.execute(
                """SELECT subscription_id, customer_email, status,
                          lookup_key, current_period_end, updated_at
                   FROM licenses ORDER BY updated_at DESC LIMIT 20"""
            ).fetchall()
            licenses_summary = [dict(r) for r in rows]

            processed_count = con.execute(
                "SELECT COUNT(*) FROM processed_events"
            ).fetchone()[0]
            db_info["processed_events_count"] = processed_count

            con.close()
        except Exception as e:
            db_info["error"] = str(e)

    if events_path.exists():
        try:
            size_kb = round(events_path.stat().st_size / 1024, 1)
            events_info["size_kb"] = size_kb
            with events_path.open("r", encoding="utf-8", errors="replace") as f:
                lines = f.readlines()
            events_info["total_lines"] = len(lines)
            tail_lines = lines[-10:] if len(lines) > 10 else lines
            recent_events: List[Dict[str, Any]] = []
            for line in tail_lines:
                line = line.strip()
                if not line:
                    continue
                try:
                    recent_events.append(json.loads(line))
                except Exception:
                    recent_events.append({"raw": line[:200]})
            events_info["recent"] = recent_events
        except Exception as e:
            events_info["error"] = str(e)

    return {
        "stripe_health": {
            "ok": stripe_ok,
            "secret_key_set": stripe_key_set,
            "webhook_secret_set": stripe_webhook_set,
        },
        "database": db_info,
        "licenses_recent": licenses_summary,
        "events_log": events_info,
    }


# ═══════════════════════════════════════════════════════════════════════════════
# v2 ENDPOINTS
# ═══════════════════════════════════════════════════════════════════════════════

# ---------------------------------------------------------------------------
# 5. GET /admin/license_customer_map
# ---------------------------------------------------------------------------
@router.get("/license_customer_map")
def license_customer_map(
    email: Optional[str] = None,
    status: Optional[str] = None,
) -> Dict[str, Any]:
    db_path = _stripe_db_path()
    if not db_path.exists():
        return {"status": "no_database", "total": 0, "licenses": []}

    try:
        con = sqlite3.connect(str(db_path))
        con.row_factory = sqlite3.Row

        query = """
            SELECT subscription_id, customer_id, customer_email, status,
                   lookup_key, allowed_users, devices_per_user,
                   current_period_end, client_reference_id, updated_at
            FROM licenses
        """
        conditions: List[str] = []
        params: List[Any] = []

        if email:
            conditions.append("lower(customer_email) = ?")
            params.append(email.strip().lower())
        if status:
            conditions.append("status = ?")
            params.append(status.strip())

        if conditions:
            query += " WHERE " + " AND ".join(conditions)
        query += " ORDER BY updated_at DESC LIMIT 200"

        rows = con.execute(query, params).fetchall()
        licenses = []
        now_ts = int(time.time())
        for r in rows:
            row_dict = dict(r)
            cpe = row_dict.get("current_period_end")
            if cpe and isinstance(cpe, int):
                row_dict["period_end_human"] = datetime.fromtimestamp(
                    cpe, tz=timezone.utc
                ).strftime("%Y-%m-%d %H:%M UTC")
                row_dict["period_expired"] = cpe < now_ts
            ua = row_dict.get("updated_at")
            if ua and isinstance(ua, int):
                row_dict["updated_at_human"] = datetime.fromtimestamp(
                    ua, tz=timezone.utc
                ).strftime("%Y-%m-%d %H:%M UTC")
            licenses.append(row_dict)

        counts = _license_counts()
        con.close()

        return {
            "status": "ok",
            "total": len(licenses),
            "counts_by_status": counts,
            "filter_email": email or None,
            "filter_status": status or None,
            "licenses": licenses,
        }
    except Exception as e:
        return {"status": "error", "error": str(e)}


# ---------------------------------------------------------------------------
# 6. GET /admin/revenue_overview
# ---------------------------------------------------------------------------
@router.get("/revenue_overview")
def revenue_overview() -> Dict[str, Any]:
    now = datetime.now(timezone.utc)
    month_start = now.replace(day=1, hour=0, minute=0, second=0, microsecond=0)
    month_start_ts = int(month_start.timestamp())

    result: Dict[str, Any] = {
        "month": now.strftime("%Y-%m"),
        "currency": "chf",
        "data_source": "local_db",
    }

    counts = _license_counts()
    result["active_subscriptions"] = counts.get("active", 0)
    result["canceled_subscriptions"] = counts.get("canceled", 0)
    result["total_subscriptions"] = sum(counts.values())
    result["counts_by_status"] = counts

    db_path = _stripe_db_path()
    counts_by_key: Dict[str, int] = {}
    estimated_mrr_cents = 0
    if db_path.exists():
        try:
            con = sqlite3.connect(str(db_path))
            rows = con.execute(
                "SELECT lookup_key, COUNT(*) FROM licenses WHERE status='active' GROUP BY lookup_key"
            ).fetchall()
            for lk, cnt in rows:
                lk_str = lk or "unknown"
                counts_by_key[lk_str] = cnt
                price = _LOOKUP_KEY_PRICES_CHF.get(lk_str, 0)
                if "yearly" in lk_str:
                    estimated_mrr_cents += int(price / 12) * cnt
                else:
                    estimated_mrr_cents += price * cnt
            con.close()
        except Exception:
            pass
    result["counts_by_lookup_key"] = counts_by_key
    result["estimated_mrr_chf"] = round(estimated_mrr_cents / 100, 2)

    stripe_data: Dict[str, Any] = {"available": False}
    stripe_key = os.environ.get("STRIPE_SECRET_KEY", "").strip()
    if stripe_key:
        try:
            import stripe as _stripe
            _stripe.api_key = stripe_key

            charges = _stripe.Charge.list(
                created={"gte": month_start_ts},
                limit=100,
            )
            gross_cents = 0
            charge_count = 0
            recent_charges: List[Dict[str, Any]] = []
            for ch in charges.auto_paging_iter():
                if ch.status == "succeeded" and ch.paid:
                    gross_cents += ch.amount
                    charge_count += 1
                    recent_charges.append({
                        "amount_chf": round(ch.amount / 100, 2),
                        "email": ch.billing_details.email if ch.billing_details else ch.receipt_email,
                        "date_utc": datetime.fromtimestamp(ch.created, tz=timezone.utc).strftime("%Y-%m-%d %H:%M UTC"),
                        "description": ch.description or "",
                        "charge_id": ch.id,
                    })

            refunds = _stripe.Refund.list(
                created={"gte": month_start_ts},
                limit=100,
            )
            refund_cents = 0
            refund_count = 0
            recent_refunds: List[Dict[str, Any]] = []
            for rf in refunds.auto_paging_iter():
                if rf.status == "succeeded":
                    refund_cents += rf.amount
                    refund_count += 1
                    recent_refunds.append({
                        "amount_chf": round(rf.amount / 100, 2),
                        "date_utc": datetime.fromtimestamp(rf.created, tz=timezone.utc).strftime("%Y-%m-%d %H:%M UTC"),
                        "refund_id": rf.id,
                    })

            stripe_data = {
                "available": True,
                "current_month_gross_chf": round(gross_cents / 100, 2),
                "current_month_charges": charge_count,
                "current_month_refunds_chf": round(refund_cents / 100, 2),
                "current_month_refund_count": refund_count,
                "current_month_net_chf": round((gross_cents - refund_cents) / 100, 2),
                "recent_charges": recent_charges,
                "recent_refunds": recent_refunds,
            }
            result["data_source"] = "stripe_api+local_db"
        except Exception as e:
            stripe_data = {"available": False, "error": str(e)}

    result["stripe_live"] = stripe_data

    events_path = _events_log_path()
    event_summary: Dict[str, int] = {}
    if events_path.exists():
        try:
            with events_path.open("r", encoding="utf-8", errors="replace") as f:
                for line in f:
                    line = line.strip()
                    if not line:
                        continue
                    try:
                        evt = json.loads(line)
                        ts = evt.get("ts", 0)
                        if ts >= month_start_ts:
                            kind = evt.get("kind", "unknown")
                            event_summary[kind] = event_summary.get(kind, 0) + 1
                    except Exception:
                        continue
        except Exception:
            pass
    result["current_month_events"] = event_summary

    return result


# ---------------------------------------------------------------------------
# 7. GET /admin/alerts
# ---------------------------------------------------------------------------
@router.get("/alerts")
def alerts() -> Dict[str, Any]:
    alert_list: List[Dict[str, str]] = []

    disk = _disk_usage()
    used_pct = disk.get("used_percent", 0)
    free_gb = disk.get("free_gb", 999)
    if isinstance(used_pct, (int, float)):
        if used_pct >= 95:
            alert_list.append({
                "id": "disk_critical",
                "severity": "critical",
                "message": f"Disk usage {used_pct}% – less than {free_gb} GB free",
            })
        elif used_pct >= 85:
            alert_list.append({
                "id": "disk_high",
                "severity": "warning",
                "message": f"Disk usage {used_pct}% – {free_gb} GB free",
            })

    if not _stripe_env_ok():
        alert_list.append({
            "id": "stripe_not_configured",
            "severity": "critical",
            "message": "Stripe env vars (SECRET_KEY / WEBHOOK_SECRET) not set",
        })

    db_path = _stripe_db_path()
    if not db_path.exists():
        alert_list.append({
            "id": "db_missing",
            "severity": "warning",
            "message": f"License database not found at {db_path}",
        })

    counts = _license_counts()
    if not counts or counts.get("active", 0) == 0:
        alert_list.append({
            "id": "no_active_licenses",
            "severity": "info",
            "message": "No active licenses in database",
        })

    backup = _newest_backup_info()
    if not backup["found"]:
        alert_list.append({
            "id": "backup_missing",
            "severity": "warning",
            "message": "No backup folders found in any known path",
        })
    else:
        age_h = backup.get("age_hours", 0)
        if age_h > 48:
            alert_list.append({
                "id": "backup_stale",
                "severity": "critical",
                "message": f"Latest backup is {backup.get('age_days', '?')} days old ({backup.get('name', '?')})",
            })
        elif age_h > 26:
            alert_list.append({
                "id": "backup_old",
                "severity": "warning",
                "message": f"Latest backup is {round(age_h, 0):.0f}h old ({backup.get('name', '?')})",
            })

    severity_counts: Dict[str, int] = {"info": 0, "warning": 0, "critical": 0}
    for a in alert_list:
        sev = a.get("severity", "info")
        severity_counts[sev] = severity_counts.get(sev, 0) + 1

    return {
        "total": len(alert_list),
        "counts_by_severity": severity_counts,
        "alerts": alert_list,
    }


# ---------------------------------------------------------------------------
# 8. GET /admin/dashboard_summary
# ---------------------------------------------------------------------------
@router.get("/dashboard_summary")
def dashboard_summary() -> Dict[str, Any]:
    now = datetime.now(timezone.utc)

    disk = _disk_usage()
    counts = _license_counts()
    backup = _newest_backup_info()
    alert_data = alerts()

    stripe_ok = _stripe_env_ok()

    total_licenses = sum(counts.values())
    active = counts.get("active", 0)
    canceled = counts.get("canceled", 0)

    rev: Dict[str, Any] = {
        "gross_chf": None,
        "refunds_chf": None,
        "net_chf": None,
        "data_source": "none",
    }
    stripe_key = os.environ.get("STRIPE_SECRET_KEY", "").strip()
    if stripe_key:
        try:
            import stripe as _stripe
            _stripe.api_key = stripe_key

            month_start = now.replace(day=1, hour=0, minute=0, second=0, microsecond=0)
            month_start_ts = int(month_start.timestamp())

            gross = 0
            for ch in _stripe.Charge.list(created={"gte": month_start_ts}, limit=100).auto_paging_iter():
                if ch.status == "succeeded" and ch.paid:
                    gross += ch.amount
            refund_total = 0
            for rf in _stripe.Refund.list(created={"gte": month_start_ts}, limit=100).auto_paging_iter():
                if rf.status == "succeeded":
                    refund_total += rf.amount

            rev = {
                "gross_chf": round(gross / 100, 2),
                "refunds_chf": round(refund_total / 100, 2),
                "net_chf": round((gross - refund_total) / 100, 2),
                "data_source": "stripe_api",
            }
        except Exception:
            rev["data_source"] = "stripe_api_error"

    return {
        "timestamp_utc": now.isoformat(),
        "system_ok": True,
        "stripe_ok": stripe_ok,
        "disk_free_gb": disk.get("free_gb"),
        "disk_used_percent": disk.get("used_percent"),
        "latest_backup": backup if backup["found"] else None,
        "licenses": {
            "total": total_licenses,
            "active": active,
            "canceled": canceled,
            "other": total_licenses - active - canceled,
            "counts_by_status": counts,
        },
        "current_month_revenue": rev,
        "alerts_total": alert_data["total"],
        "alerts_by_severity": alert_data["counts_by_severity"],
    }


# ---------------------------------------------------------------------------
# 9. GET /admin/devices?email=...
# ---------------------------------------------------------------------------
@router.get("/devices")
def admin_devices(email: Optional[str] = None) -> Dict[str, Any]:
    """Device overview for a customer email. If no email given, list all emails with devices."""
    from aza_device_enforcement import list_devices_for_email, DB_PATH as _DEV_DB

    db_path = str(_BASE_DIR / "data" / "stripe_webhook.sqlite")
    try:
        from stripe_routes import DB_PATH as _SR_DB  # type: ignore
        db_path = _SR_DB
    except Exception:
        pass

    if email and email.strip():
        return list_devices_for_email(email.strip(), db_path=db_path)

    try:
        con = sqlite3.connect(db_path)
        rows = con.execute(
            """SELECT customer_email, COUNT(*) AS device_count,
                      MAX(last_seen_at) AS last_active
               FROM device_bindings
               GROUP BY lower(customer_email)
               ORDER BY last_active DESC"""
        ).fetchall()
        con.close()
        return {
            "customers": [
                {"email": r[0], "device_count": r[1], "last_active": r[2]}
                for r in rows
            ]
        }
    except Exception as exc:
        return {"error": str(exc), "customers": []}


# ---------------------------------------------------------------------------
# KI-Budget Phase 1 (Admin, USD sichtbar)
# ---------------------------------------------------------------------------
@router.get("/ai_budget_overview")
def ai_budget_overview(status: Optional[str] = Query(None)) -> Dict[str, Any]:
    """Übersicht aktiver Lizenzen inkl. geschätztem KI-USD-Verbrauch pro Stripe-Periode."""
    from aza_ai_budget import LicenseBudgetRow, compute_budget_snapshot, ensure_ai_budget_schema

    db_path = _stripe_db_path()
    if not db_path.exists():
        return {"status": "no_database", "licenses": []}
    try:
        import backend_main as _bm

        _bm.ensure_license_schema(db_path)
    except Exception as exc:
        return {"status": "error", "error": str(exc), "licenses": []}

    out: List[Dict[str, Any]] = []
    try:
        with sqlite3.connect(str(db_path)) as con:
            ensure_ai_budget_schema(con)
            q = (
                "SELECT subscription_id, customer_id, customer_email, practice_id, lookup_key, status, "
                "current_period_start, current_period_end "
                "FROM licenses"
            )
            params: List[Any] = []
            if status and status.strip():
                q += " WHERE status = ?"
                params.append(status.strip())
            q += " ORDER BY updated_at DESC LIMIT 200"
            rows = con.execute(q, params).fetchall()
            for r in rows:
                lic = LicenseBudgetRow(
                    subscription_id=str(r[0] or ""),
                    customer_email=str(r[2] or ""),
                    customer_id=str(r[1]) if r[1] else None,
                    practice_id=str(r[3]).strip() if r[3] else None,
                    lookup_key=str(r[4]).strip() if r[4] else None,
                    status=str(r[5] or ""),
                    period_start=int(r[6]) if r[6] is not None else None,
                    period_end=int(r[7]) if r[7] is not None else None,
                )
                snap = compute_budget_snapshot(con, lic)
                ev = con.execute(
                    """
                    SELECT COUNT(*), MAX(created_at)
                    FROM ai_usage_events
                    WHERE subscription_id = ?
                      AND period_start = ? AND period_end = ?
                    """,
                    (lic.subscription_id, snap["period_start"], snap["period_end"]),
                ).fetchone()
                row_dict = dict(snap)
                row_dict["customer_email"] = lic.customer_email
                row_dict["lookup_key"] = lic.lookup_key or ""
                row_dict["license_status"] = lic.status
                row_dict["event_count"] = int(ev[0] or 0)
                row_dict["last_event_ts"] = int(ev[1] or 0)
                if row_dict["last_event_ts"]:
                    row_dict["last_event_human"] = datetime.fromtimestamp(
                        row_dict["last_event_ts"], tz=timezone.utc
                    ).strftime("%Y-%m-%d %H:%M UTC")
                out.append(row_dict)
        return {"status": "ok", "licenses": out}
    except Exception as exc:
        return {"status": "error", "error": str(exc), "licenses": []}


@router.get("/ai_budget_detail")
def ai_budget_detail(email: str = Query(..., min_length=3)) -> Dict[str, Any]:
    from aza_ai_budget import LicenseBudgetRow, compute_budget_snapshot, ensure_ai_budget_schema

    db_path = _stripe_db_path()
    if not db_path.exists():
        return {"status": "no_database"}
    import backend_main as _bm

    _bm.ensure_license_schema(db_path)
    em = email.strip().lower()
    with sqlite3.connect(str(db_path)) as con:
        ensure_ai_budget_schema(con)
        row = con.execute(
            """
            SELECT subscription_id, customer_id, customer_email, practice_id, lookup_key, status,
                   current_period_start, current_period_end
            FROM licenses
            WHERE lower(customer_email) = ?
            ORDER BY updated_at DESC
            LIMIT 1
            """,
            (em,),
        ).fetchone()
        if not row:
            return {"status": "not_found", "email": em}
        lic = LicenseBudgetRow(
            subscription_id=str(row[0] or ""),
            customer_email=str(row[2] or ""),
            customer_id=str(row[1]) if row[1] else None,
            practice_id=str(row[3]).strip() if row[3] else None,
            lookup_key=str(row[4]).strip() if row[4] else None,
            status=str(row[5] or ""),
            period_start=int(row[6]) if row[6] is not None else None,
            period_end=int(row[7]) if row[7] is not None else None,
        )
        snap = compute_budget_snapshot(con, lic)
        by_op = con.execute(
            """
            SELECT operation_type, COALESCE(SUM(estimated_cost_usd), 0)
            FROM ai_usage_events
            WHERE subscription_id = ? AND period_start = ? AND period_end = ? AND status = 'success'
            GROUP BY operation_type
            """,
            (lic.subscription_id, snap["period_start"], snap["period_end"]),
        ).fetchall()
        by_model = con.execute(
            """
            SELECT model, COALESCE(SUM(estimated_cost_usd), 0)
            FROM ai_usage_events
            WHERE subscription_id = ? AND period_start = ? AND period_end = ? AND status = 'success'
            GROUP BY model
            """,
            (lic.subscription_id, snap["period_start"], snap["period_end"]),
        ).fetchall()
        recent = con.execute(
            """
            SELECT created_at, operation_type, model, estimated_cost_usd, status, error_code, request_id
            FROM ai_usage_events
            WHERE subscription_id = ?
            ORDER BY created_at DESC
            LIMIT 20
            """,
            (lic.subscription_id,),
        ).fetchall()
        blocked = con.execute(
            """
            SELECT created_at, operation_type, error_code, request_id
            FROM ai_usage_events
            WHERE subscription_id = ? AND status = 'blocked'
            ORDER BY created_at DESC
            LIMIT 20
            """,
            (lic.subscription_id,),
        ).fetchall()
        return {
            "status": "ok",
            "snapshot": snap,
            "usage_by_operation": [{"operation": a[0], "usd": round(float(a[1] or 0), 6)} for a in by_op],
            "usage_by_model": [{"model": a[0], "usd": round(float(a[1] or 0), 6)} for a in by_model],
            "recent_events": [
                {
                    "created_at": a[0],
                    "operation_type": a[1],
                    "model": a[2],
                    "usd": float(a[3] or 0),
                    "status": a[4],
                    "error_code": a[5],
                    "request_id": a[6],
                }
                for a in recent
            ],
            "blocked_events": [
                {"created_at": b[0], "operation_type": b[1], "error_code": b[2], "request_id": b[3]}
                for b in blocked
            ],
        }


@router.get("/ai_budget_export.csv")
def ai_budget_export_csv(status: Optional[str] = Query("active")) -> Response:
    import backend_main as _bm
    from aza_ai_budget import LicenseBudgetRow, compute_budget_snapshot, ensure_ai_budget_schema

    db_path = _stripe_db_path()
    if not db_path.exists():
        return Response("no database\n", media_type="text/plain", status_code=404)
    _bm.ensure_license_schema(db_path)
    buf = io.StringIO()
    w = csv.writer(buf)
    w.writerow([
        "subscription_id", "customer_email", "license_status", "lookup_key",
        "period_start_utc", "period_end_utc", "budget_usd", "used_usd", "remaining_usd",
        "available_percent", "event_count",
    ])
    with sqlite3.connect(str(db_path)) as con:
        ensure_ai_budget_schema(con)
        q = (
            "SELECT subscription_id, customer_id, customer_email, practice_id, lookup_key, status, "
            "current_period_start, current_period_end FROM licenses"
        )
        params: List[Any] = []
        if status and status.strip():
            q += " WHERE status = ?"
            params.append(status.strip())
        q += " ORDER BY updated_at DESC LIMIT 500"
        for r in con.execute(q, params).fetchall():
            lic = LicenseBudgetRow(
                subscription_id=str(r[0] or ""),
                customer_email=str(r[2] or ""),
                customer_id=str(r[1]) if r[1] else None,
                practice_id=str(r[3]).strip() if r[3] else None,
                lookup_key=str(r[4]).strip() if r[4] else None,
                status=str(r[5] or ""),
                period_start=int(r[6]) if r[6] is not None else None,
                period_end=int(r[7]) if r[7] is not None else None,
            )
            snap = compute_budget_snapshot(con, lic)
            evc = con.execute(
                """
                SELECT COUNT(*) FROM ai_usage_events
                WHERE subscription_id = ? AND period_start = ? AND period_end = ?
                """,
                (lic.subscription_id, snap["period_start"], snap["period_end"]),
            ).fetchone()
            ps_h = datetime.fromtimestamp(int(snap["period_start"]), tz=timezone.utc).strftime("%Y-%m-%d %H:%M")
            pe_h = datetime.fromtimestamp(int(snap["period_end"]), tz=timezone.utc).strftime("%Y-%m-%d %H:%M")
            w.writerow([
                lic.subscription_id,
                lic.customer_email,
                lic.status,
                lic.lookup_key or "",
                ps_h,
                pe_h,
                snap.get("budget_usd"),
                snap.get("used_usd"),
                snap.get("remaining_usd"),
                snap.get("available_percent"),
                int(evc[0] or 0),
            ])
    data = buf.getvalue()
    return Response(
        content=data.encode("utf-8"),
        media_type="text/csv; charset=utf-8",
        headers={"Content-Disposition": 'attachment; filename="ai_budget_export.csv"'},
    )


# ---------------------------------------------------------------------------
# Stripe: Abrechnungsperioden (read-only Subscription.retrieve, nur Perioden-Spalten)
# ---------------------------------------------------------------------------
@router.post("/stripe_sync_periods")
def stripe_sync_periods() -> Dict[str, Any]:
    """Aktive Lizenzen: current_period_start/end aus Stripe füllen. Kein Status-/Kunden-Write."""
    from stripe_routes import sync_active_license_periods_from_stripe_only

    return sync_active_license_periods_from_stripe_only()


@router.post("/woocommerce_sync_periods")
def woocommerce_sync_periods() -> Dict[str, Any]:
    """Aktive wc_sub_*-Lizenzen: Abrechnungsperioden read-only aus WooCommerce REST."""
    from aza_wc_period_sync import sync_active_license_periods_from_woocommerce_only

    out = sync_active_license_periods_from_woocommerce_only()
    if isinstance(out, dict):
        code = out.get("error_code")
        if code in ("WOO_CREDENTIALS_MISSING", "DB_MISSING", "REQUESTS_MISSING"):
            return JSONResponse(status_code=503, content=out)  # type: ignore[return-value]
    return out


@router.get("/ai_credit_overview")
def ai_credit_overview(status: Optional[str] = Query(None)) -> Dict[str, Any]:
    """KI-Zusatzguthaben-Übersicht (Admin, keine Secrets)."""
    from aza_ai_budget import LicenseBudgetRow, compute_budget_snapshot, ensure_ai_budget_schema, monthly_budget_usd_for_license
    from aza_ai_credit import admin_credit_overview_row, ensure_ai_credit_schema

    db_path = _stripe_db_path()
    if not db_path.exists():
        return {"status": "no_database", "licenses": []}
    import backend_main as _bm

    _bm.ensure_license_schema(db_path)
    out: List[Dict[str, Any]] = []
    with sqlite3.connect(str(db_path)) as con:
        ensure_ai_budget_schema(con)
        ensure_ai_credit_schema(con)
        q = (
            "SELECT subscription_id, customer_id, customer_email, practice_id, lookup_key, status, "
            "current_period_start, current_period_end FROM licenses"
        )
        params: List[Any] = []
        if status and status.strip():
            q += " WHERE status = ?"
            params.append(status.strip())
        q += " ORDER BY updated_at DESC LIMIT 200"
        rows = con.execute(q, params).fetchall()
        for r in rows:
            lic = LicenseBudgetRow(
                subscription_id=str(r[0] or ""),
                customer_email=str(r[2] or ""),
                customer_id=str(r[1]) if r[1] else None,
                practice_id=str(r[3]).strip() if r[3] else None,
                lookup_key=str(r[4]).strip() if r[4] else None,
                status=str(r[5] or ""),
                period_start=int(r[6]) if r[6] is not None else None,
                period_end=int(r[7]) if r[7] is not None else None,
            )
            if not (lic.practice_id or "").strip():
                continue
            snap = compute_budget_snapshot(con, lic)
            budget = monthly_budget_usd_for_license(lic)
            out.append(
                admin_credit_overview_row(
                    con,
                    practice_id=lic.practice_id or "",
                    subscription_id=lic.subscription_id,
                    monthly_budget=budget,
                    snap=snap,
                )
            )
    return {"status": "ok", "licenses": out}


@router.get("/ai_credit_ledger")
def ai_credit_ledger(
    practice_id: str = Query(..., min_length=3),
    limit: int = Query(100, ge=1, le=500),
) -> Dict[str, Any]:
    from aza_ai_credit import ensure_ai_credit_schema, list_ledger_for_practice

    db_path = _stripe_db_path()
    if not db_path.exists():
        return {"status": "no_database", "entries": []}
    import backend_main as _bm

    _bm.ensure_license_schema(db_path)
    pid = practice_id.strip()
    with sqlite3.connect(str(db_path)) as con:
        ensure_ai_credit_schema(con)
        entries = list_ledger_for_practice(con, pid, limit=limit)
    return {"status": "ok", "practice_id": pid, "entries": entries}

@router.get("/ai_credit_overview")
def ai_credit_overview(status: Optional[str] = Query(None)) -> Dict[str, Any]:
    """KI-Zusatzguthaben-Übersicht (Admin, keine Secrets)."""
    from aza_ai_budget import LicenseBudgetRow, compute_budget_snapshot, ensure_ai_budget_schema, monthly_budget_usd_for_license
    from aza_ai_credit import admin_credit_overview_row, ensure_ai_credit_schema

    db_path = _stripe_db_path()
    if not db_path.exists():
        return {"status": "no_database", "licenses": []}
    import backend_main as _bm

    _bm.ensure_license_schema(db_path)
    out: List[Dict[str, Any]] = []
    with sqlite3.connect(str(db_path)) as con:
        ensure_ai_budget_schema(con)
        ensure_ai_credit_schema(con)
        q = (
            "SELECT subscription_id, customer_id, customer_email, practice_id, lookup_key, status, "
            "current_period_start, current_period_end FROM licenses"
        )
        params: List[Any] = []
        if status and status.strip():
            q += " WHERE status = ?"
            params.append(status.strip())
        q += " ORDER BY updated_at DESC LIMIT 200"
        rows = con.execute(q, params).fetchall()
        for r in rows:
            lic = LicenseBudgetRow(
                subscription_id=str(r[0] or ""),
                customer_email=str(r[2] or ""),
                customer_id=str(r[1]) if r[1] else None,
                practice_id=str(r[3]).strip() if r[3] else None,
                lookup_key=str(r[4]).strip() if r[4] else None,
                status=str(r[5] or ""),
                period_start=int(r[6]) if r[6] is not None else None,
                period_end=int(r[7]) if r[7] is not None else None,
            )
            if not (lic.practice_id or "").strip():
                continue
            snap = compute_budget_snapshot(con, lic)
            budget = monthly_budget_usd_for_license(lic)
            out.append(
                admin_credit_overview_row(
                    con,
                    practice_id=lic.practice_id or "",
                    subscription_id=lic.subscription_id,
                    monthly_budget=budget,
                    snap=snap,
                )
            )
    return {"status": "ok", "licenses": out}


@router.get("/ai_credit_ledger")
def ai_credit_ledger(
    practice_id: str = Query(..., min_length=3),
    limit: int = Query(100, ge=1, le=500),
) -> Dict[str, Any]:
    from aza_ai_credit import ensure_ai_credit_schema, list_ledger_for_practice

    db_path = _stripe_db_path()
    if not db_path.exists():
        return {"status": "no_database", "entries": []}
    import backend_main as _bm

    _bm.ensure_license_schema(db_path)
    pid = practice_id.strip()
    with sqlite3.connect(str(db_path)) as con:
        ensure_ai_credit_schema(con)
        entries = list_ledger_for_practice(con, pid, limit=limit)
    return {"status": "ok", "practice_id": pid, "entries": entries}