"""运营域路由：诊断、管理面、支持包与观测（WP-14）。"""

from typing import Annotated, Any

from fastapi import APIRouter, Depends, Header, HTTPException, Request, Response, status
from sqlalchemy import func, select
from sqlalchemy import text as sql_text

from app.auth.dependencies import get_current_user, require_state_change
from app.conversations.routes import _domain_of
from app.db.session import DbSession
from app.models import MediaJob, Message, Run, ToolCall, User
from app.ops import service

ops_router = APIRouter(prefix="/v1", tags=["ops-extended"])
admin_router = APIRouter(prefix="/v1/admin", tags=["admin"])


@ops_router.post("/runs/{run_id}/diagnostic-grants", status_code=201)
async def issue_grant(
    run_id: str,
    db: DbSession,
    user: Annotated[User, Depends(require_state_change)],
    request: Request,
    body: dict[str, str],
) -> dict[str, Any]:
    """签发诊断授权：明文 token 只返回一次；默认 15 分钟、单次、绑定 Run。"""
    domain = await _domain_of(db, user)
    grant, token = await service.issue_grant(
        db, domain.id, run_id, body.get("purpose", ""),
        getattr(request.state, "trace_id", None),
    )
    return {
        "grant_id": grant.id, "token": token,  # 唯一一次明文返回
        "expires_at": grant.expires_at.isoformat(),
    }


@ops_router.get("/runs/{run_id}/diagnostics")
async def read_diagnostics(
    run_id: str,
    db: DbSession,
    user: Annotated[User, Depends(get_current_user)],
    response: Response,
    diag_token: Annotated[
        str | None, Header(alias="Hunjing-Diagnostic-Token")
    ] = None,
    diag_purpose: Annotated[
        str | None, Header(alias="Hunjing-Diagnostic-Purpose")
    ] = None,
) -> dict[str, Any]:
    """双重授权诊断：登录态 + 诊断令牌；响应不落缓存（ADR-004）。"""
    domain = await _domain_of(db, user)
    if not diag_token or not diag_purpose:
        raise HTTPException(status.HTTP_401_UNAUTHORIZED, "缺少诊断令牌或用途")
    result = await service.read_diagnostics(
        db, domain.id, run_id, diag_token, diag_purpose
    )
    response.headers["Cache-Control"] = "no-store, private"
    return result


@ops_router.post("/support/bundles")
async def support_bundle(
    db: DbSession,
    user: Annotated[User, Depends(require_state_change)],
) -> dict[str, Any]:
    """脱敏支持包：统计聚合，无正文与密钥。"""
    domain = await _domain_of(db, user)
    return await service.build_support_bundle(db, domain.id)


@admin_router.get("/moderation-cases")
async def list_cases(
    db: DbSession,
    user: Annotated[User, Depends(get_current_user)],
) -> dict[str, Any]:
    await service.require_admin(db, user.id)
    from app.models import Report

    cases = await service.list_pending_cases(db)
    out = []
    for case in cases:
        report = await db.get(Report, case.report_id)
        out.append({
            "case_id": case.id, "status": case.status,
            "report": {
                "target_type": report.target_type if report else None,
                "target_id": report.target_id if report else None,
                "reason": report.reason if report else None,
            } if report else None,
        })
    return {"data": out}


@admin_router.post("/moderation-cases/{case_id}/resolutions")
async def resolve_case(
    case_id: str,
    db: DbSession,
    user: Annotated[User, Depends(require_state_change)],
    request: Request,
    body: dict[str, str],
) -> dict[str, Any]:
    domain = await _domain_of(db, user)
    await service.require_admin(db, user.id)
    case = await service.resolve_case(
        db, domain.id, case_id, body.get("action", ""),
        getattr(request.state, "trace_id", None),
    )
    return {"case_id": case.id, "status": case.status, "action_taken": case.action_taken}


@ops_router.get("/readyz", tags=["ops"])
async def readyz(db: DbSession) -> dict[str, str]:
    await db.execute(sql_text("SELECT 1"))
    return {"status": "ready"}


@ops_router.get("/metrics", tags=["ops"])
async def metrics(db: DbSession) -> Response:
    """Prometheus 文本格式：真实 SQL 聚合（无正文）。"""
    run_rows = (await db.execute(select(Run.status, func.count()).group_by(Run.status))).all()
    msg_total = (await db.execute(select(func.count()).select_from(Message))).scalar_one()
    tool_rows = (
        await db.execute(select(ToolCall.status, func.count()).group_by(ToolCall.status))
    ).all()
    media_rows = (
        await db.execute(select(MediaJob.status, func.count()).group_by(MediaJob.status))
    ).all()
    lines = ["# HELP hunjing_runs_total Run 总数（按状态）", "# TYPE hunjing_runs_total counter"]
    for st, cnt in run_rows:
        lines.append(f'hunjing_runs_total{{status="{st}"}} {int(cnt)}')
    lines += [
        "# HELP hunjing_messages_total 消息总数",
        "# TYPE hunjing_messages_total counter",
        f"hunjing_messages_total {int(msg_total)}",
    ]
    groups = [
        ("hunjing_tool_calls_total", tool_rows),
        ("hunjing_media_jobs_total", media_rows),
    ]
    for prefix, rows in groups:
        lines.append(f"# HELP {prefix} 计数（按状态）")
        lines.append(f"# TYPE {prefix} counter")
        for st, cnt in rows:
            lines.append(f'{prefix}{{status="{st}"}} {int(cnt)}')
    return Response(content="\n".join(lines) + "\n", media_type="text/plain")