"""Admin API для bulk cadastre harvest (GH issue #168, PR 3/5).

Endpoints:
  POST /api/v1/admin/cadastre/jobs       — создать job + enqueue
  GET  /api/v1/admin/cadastre/jobs       — список jobs
  GET  /api/v1/admin/cadastre/jobs/{id}  — детали job
  POST /api/v1/admin/cadastre/jobs/{id}/cancel — отменить job
  POST /api/v1/admin/cadastre/jobs/{id}/resume — возобновить paused job

Scope variants:
  pilot       — первые 50 кварталов ЕКБ (66:41:%)
  ekb_full    — все ~2408 кварталов ЕКБ
  manual_list — явный список quarters в body.quarters

Auth: gendsgn.ru-wide Caddy basic_auth gate (PR #426). App-level X-Admin-Token
header removed 2026-05-23 — двойная auth избыточна для pilot.
"""

from __future__ import annotations

import json
import logging
from typing import Annotated, Any

from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel, Field
from sqlalchemy import text
from sqlalchemy.orm import Session

from app.core.db import get_db

logger = logging.getLogger(__name__)

router = APIRouter()

# Ограничение пилота
PILOT_LIMIT = 50
# Регион по умолчанию — ЕКБ (66:41:%)
EKB_PREFIX = "66:41:%"


# ── Request / response schemas ───────────────────────────────────────────────


class CreateCadastreJobRequest(BaseModel):
    """Параметры создания bulk cadastre job."""

    scope: str = Field(
        ...,
        pattern="^(pilot|ekb_full|manual_list)$",
        description="pilot=50 кварталов ЕКБ, ekb_full=все 2408, manual_list=явный список",
    )
    quarters: list[str] | None = Field(
        default=None,
        max_length=5000,
        description="Список кварталов для scope=manual_list",
    )
    limit: int | None = Field(
        default=None,
        ge=1,
        le=10000,
        description="Ограничить количество кварталов (override для pilot/ekb_full)",
    )
    name: str | None = Field(default=None, max_length=200)
    rate_ms: int = Field(
        default=333,
        ge=50,
        le=10000,
        description="Задержка между запросами в мс (333мс = ~3 req/s)",
    )


# ── Helpers ──────────────────────────────────────────────────────────────────


def _resolve_quarters(
    db: Session,
    scope: str,
    quarters: list[str] | None,
    limit: int | None,
) -> list[str]:
    """Собрать список кварталов согласно scope."""
    if scope == "manual_list":
        if not quarters:
            raise HTTPException(
                status_code=400,
                detail="scope=manual_list требует непустой список quarters",
            )
        return [q.strip() for q in quarters if q.strip()]

    cap = limit or (PILOT_LIMIT if scope == "pilot" else 100000)

    rows = db.execute(
        text("""
            SELECT cad_number
            FROM cad_quarters_geom
            WHERE cad_number LIKE :prefix
            ORDER BY cad_number
            LIMIT :cap
        """),
        {"prefix": EKB_PREFIX, "cap": cap},
    ).all()

    if not rows:
        raise HTTPException(
            status_code=400,
            detail=(
                f"Нет кварталов с префиксом {EKB_PREFIX!r} в cad_quarters_geom. "
                "Убедитесь что geo-backfill кварталов завершён."
            ),
        )

    return [str(r[0]) for r in rows]


def _create_job(
    db: Session,
    *,
    name: str | None,
    scope: str,
    quarters: list[str],
    rate_ms: int,
    triggered_by: str = "manual",
) -> int:
    """INSERT в cadastre_jobs, вернуть job_id."""
    job_id = db.execute(
        text("""
            INSERT INTO cadastre_jobs (
                name, job_kind, scope, status,
                rate_ms, triggered_by,
                targets_total, raw_targets
            ) VALUES (
                :name, :job_kind, :scope, 'queued',
                :rate_ms, :triggered_by,
                :targets_total, CAST(:raw_targets AS jsonb)
            )
            RETURNING job_id
        """),
        {
            "name": name,
            "job_kind": scope,
            "scope": scope,
            "rate_ms": rate_ms,
            "triggered_by": triggered_by,
            "targets_total": len(quarters),
            "raw_targets": json.dumps({"quarters": quarters}, ensure_ascii=False),
        },
    ).scalar_one()
    db.commit()
    return int(job_id)


def _serialize_job(row: Any) -> dict[str, Any]:
    """Сериализовать строку cadastre_jobs в dict для API response."""
    targets_total = row["targets_total"] or 0
    targets_done = row["targets_done"] or 0

    return {
        "job_id": row["job_id"],
        "name": row["name"],
        "job_kind": row["job_kind"],
        "scope": row["scope"],
        "status": row["status"],
        "triggered_by": row["triggered_by"],
        "rate_ms": row["rate_ms"],
        "created_at": row["created_at"].isoformat() if row["created_at"] else None,
        "started_at": row["started_at"].isoformat() if row["started_at"] else None,
        "finished_at": row["finished_at"].isoformat() if row["finished_at"] else None,
        "heartbeat_at": row["heartbeat_at"].isoformat() if row["heartbeat_at"] else None,
        "targets_total": targets_total,
        "targets_done": targets_done,
        "targets_failed": row["targets_failed"] or 0,
        "targets_skipped": row["targets_skipped"] or 0,
        "requests_count": row["requests_count"] or 0,
        "waf_blocked_count": row["waf_blocked_count"] or 0,
        "error": row["error"],
        "phase_state": row["phase_state"],
        "progress_pct": round(100.0 * targets_done / max(targets_total, 1), 1),
        "estimate_minutes": round(targets_total * (row["rate_ms"] or 333) / 1000 / 60, 1),
    }


# ── Endpoints ────────────────────────────────────────────────────────────────


@router.post("/jobs")
def create_cadastre_job(
    body: CreateCadastreJobRequest,
    db: Annotated[Session, Depends(get_db)],
) -> dict[str, Any]:
    """Создать bulk cadastre harvest job и поставить в очередь.

    scope=pilot    → первые 50 ЕКБ кварталов из cad_quarters_geom
    scope=ekb_full → все ~2408 ЕКБ кварталов
    scope=manual_list → body.quarters (явный список)

    Возвращает: {job_id, targets_total, estimate_minutes}
    """
    from app.workers.tasks.scrape_cadastre import enqueue_cadastre_harvest

    quarters = _resolve_quarters(db, body.scope, body.quarters, body.limit)

    job_id = _create_job(
        db,
        name=body.name or f"cadastre_{body.scope}",
        scope=body.scope,
        quarters=quarters,
        rate_ms=body.rate_ms,
    )

    # Enqueue таск который в свою очередь запустит per-quarter tasks
    enqueue_cadastre_harvest.apply_async(
        args=[job_id],
        queue="geo",
    )

    estimate_minutes = round(len(quarters) * body.rate_ms / 1000 / 60, 1)

    logger.info(
        "create_cadastre_job: job_id=%d scope=%s quarters=%d estimate=%.1fmin",
        job_id,
        body.scope,
        len(quarters),
        estimate_minutes,
    )

    return {
        "job_id": job_id,
        "scope": body.scope,
        "targets_total": len(quarters),
        "estimate_minutes": estimate_minutes,
    }


@router.get("/jobs")
def list_cadastre_jobs(
    db: Annotated[Session, Depends(get_db)],
    limit: int = 30,
) -> list[dict[str, Any]]:
    """Список последних cadastre harvest jobs."""
    rows = (
        db.execute(
            text("""
                SELECT job_id, name, job_kind, scope, status, triggered_by,
                       rate_ms, created_at, started_at, finished_at, heartbeat_at,
                       targets_total, targets_done, targets_failed, targets_skipped,
                       requests_count, waf_blocked_count,
                       error, phase_state
                FROM cadastre_jobs
                ORDER BY created_at DESC
                LIMIT :lim
            """),
            {"lim": min(limit, 200)},
        )
        .mappings()
        .all()
    )
    return [_serialize_job(r) for r in rows]


@router.get("/jobs/{job_id}")
def get_cadastre_job(
    job_id: int,
    db: Annotated[Session, Depends(get_db)],
) -> dict[str, Any]:
    """Детали одного cadastre harvest job."""
    row = (
        db.execute(
            text("""
                SELECT job_id, name, job_kind, scope, status, triggered_by,
                       rate_ms, created_at, started_at, finished_at, heartbeat_at,
                       targets_total, targets_done, targets_failed, targets_skipped,
                       requests_count, waf_blocked_count,
                       error, phase_state, raw_targets
                FROM cadastre_jobs
                WHERE job_id = :id
            """),
            {"id": job_id},
        )
        .mappings()
        .first()
    )
    if not row:
        raise HTTPException(status_code=404, detail=f"cadastre_job {job_id} не найден")

    result = _serialize_job(row)
    # Добавить сводку по raw_targets (количество + первые 10 для UI)
    raw_targets = row["raw_targets"] or {}
    quarters = raw_targets.get("quarters", [])
    result["raw_targets_count"] = len(quarters)
    result["raw_targets_preview"] = quarters[:10]
    return result


@router.post("/jobs/{job_id}/cancel")
def cancel_cadastre_job(
    job_id: int,
    db: Annotated[Session, Depends(get_db)],
) -> dict[str, Any]:
    """Отменить job. Воркеры увидят status='cancelled' при следующей итерации и skip."""
    result = db.execute(
        text("""
            UPDATE cadastre_jobs
            SET status = 'cancelled',
                finished_at = COALESCE(finished_at, NOW()),
                error = COALESCE(error, 'cancelled by admin')
            WHERE job_id = :id
              AND status IN ('queued', 'running', 'paused')
            RETURNING job_id
        """),
        {"id": job_id},
    ).first()
    db.commit()

    if not result:
        raise HTTPException(
            status_code=404,
            detail=f"cadastre_job {job_id} не найден или уже завершён/отменён",
        )
    logger.info("cancel_cadastre_job: job_id=%d cancelled", job_id)
    return {"job_id": job_id, "cancelled": True}


@router.post("/jobs/{job_id}/resume")
def resume_cadastre_job(
    job_id: int,
    db: Annotated[Session, Depends(get_db)],
) -> dict[str, Any]:
    """Возобновить paused/failed job. Re-enqueue enqueue_cadastre_harvest."""
    from app.workers.tasks.scrape_cadastre import enqueue_cadastre_harvest

    result = db.execute(
        text("""
            UPDATE cadastre_jobs
            SET status = 'queued', error = NULL
            WHERE job_id = :id
              AND status IN ('paused', 'failed')
            RETURNING job_id
        """),
        {"id": job_id},
    ).first()
    db.commit()

    if not result:
        raise HTTPException(
            status_code=404,
            detail=f"cadastre_job {job_id} не найден или не в состоянии paused/failed",
        )

    enqueue_cadastre_harvest.apply_async(args=[job_id], queue="geo")
    logger.info("resume_cadastre_job: job_id=%d re-enqueued", job_id)
    return {"job_id": job_id, "resumed": True}