"""管理面板路由（/api/admin）

提供：
- 登录认证（密码 + token）
- 触发 AI 分析
- 浏览统计
- 报告管理
"""

import json
import time
from datetime import datetime, timezone, timedelta

from fastapi import APIRouter, HTTPException, Request
from fastapi.responses import JSONResponse
from pydantic import BaseModel

from services import admin_auth
from database import get_connection, dict_from_row

_CST = timezone(timedelta(hours=8))
_NO_CACHE_HEADERS = {"Cache-Control": "no-store, no-cache, must-revalidate, max-age=0"}

router = APIRouter()


def _require_auth(request: Request) -> str:
    """从 header 或 cookie 提取 token 并验证"""
    token = request.headers.get("X-Admin-Token", "")
    if not token:
        # fallback: 从 cookie 读
        token = request.cookies.get("admin_token", "")
    if not admin_auth.verify_token(token):
        raise HTTPException(status_code=401, detail="未登录或登录已过期")
    return token


class LoginRequest(BaseModel):
    password: str


@router.post("/admin/login", summary="管理员登录")
async def admin_login(body: LoginRequest):
    if not admin_auth.is_configured():
        # 自动设置默认密码
        import os
        default_pw = os.getenv("ADMIN_PASSWORD", "!auvauv")
        admin_auth.set_password(default_pw)
    if not admin_auth.verify_password(body.password):
        raise HTTPException(status_code=401, detail="密码错误")
    token = admin_auth.create_token()
    return JSONResponse({"data": {"token": token, "expiresIn": admin_auth.TOKEN_TTL}})


@router.post("/admin/logout", summary="管理员登出")
async def admin_logout(request: Request):
    token = request.headers.get("X-Admin-Token", "") or request.cookies.get("admin_token", "")
    admin_auth.revoke_token(token)
    return JSONResponse({"data": "ok"})


class ChangePasswordRequest(BaseModel):
    old_password: str
    new_password: str


@router.post("/admin/change-password", summary="修改管理密码")
async def admin_change_password(body: ChangePasswordRequest, request: Request):
    _require_auth(request)
    if not admin_auth.verify_password(body.old_password):
        raise HTTPException(status_code=401, detail="原密码错误")
    if len(body.new_password) < 4:
        raise HTTPException(status_code=400, detail="密码至少4位")
    admin_auth.set_password(body.new_password)
    return JSONResponse({"data": "密码已更新"})


@router.get("/admin/stats", summary="管理面板统计数据")
async def admin_stats(request: Request):
    _require_auth(request)
    conn = get_connection()
    try:
        stats = {}

        # 报告总数
        row = conn.execute("SELECT COUNT(*) as cnt FROM ai_reports").fetchone()
        stats["reportCount"] = row["cnt"]

        # 总 tokens
        row = conn.execute("SELECT COALESCE(SUM(tokens_used), 0) as total FROM ai_reports").fetchone()
        stats["totalTokens"] = row["total"]

        # 最新报告
        row = conn.execute(
            "SELECT trade_date, title FROM ai_reports ORDER BY trade_date DESC LIMIT 1"
        ).fetchone()
        stats["latestReport"] = dict_from_row(row) if row else None

        # 集合数
        row = conn.execute("SELECT COUNT(*) as cnt FROM stock_collections").fetchone()
        stats["collectionCount"] = row["cnt"]

        # 关注股票数
        row = conn.execute("SELECT COUNT(*) as cnt FROM collection_stocks").fetchone()
        stats["stockCount"] = row["cnt"]

        # 分享链接数
        row = conn.execute("SELECT COUNT(*) as cnt FROM share_links").fetchone()
        stats["shareLinkCount"] = row["cnt"]

        # 核心股天数
        row = conn.execute(
            "SELECT COUNT(DISTINCT trade_date) as cnt FROM daily_core_stocks"
        ).fetchone()
        stats["coreStockDays"] = row["cnt"]

        # 近7天报告
        rows = conn.execute(
            "SELECT trade_date, title, tokens_used, created_at FROM ai_reports "
            "ORDER BY trade_date DESC LIMIT 7"
        ).fetchall()
        stats["recentReports"] = [dict_from_row(r) for r in rows]

        return JSONResponse({"data": stats}, headers=_NO_CACHE_HEADERS)
    finally:
        conn.close()


@router.post("/admin/trigger-analysis", summary="触发 AI 分析")
async def admin_trigger_analysis(request: Request):
    _require_auth(request)
    now = datetime.now(_CST)
    trade_date = now.strftime("%Y-%m-%d")

    from services.ai_service import collect_ai_analysis
    result = await collect_ai_analysis(trade_date)
    return JSONResponse({"data": result})


@router.get("/admin/reports", summary="报告列表（管理用）")
async def admin_list_reports(request: Request):
    _require_auth(request)
    conn = get_connection()
    try:
        rows = conn.execute(
            "SELECT id, trade_date, report_type, title, summary, tools_used, model, tokens_used, created_at "
            "FROM ai_reports ORDER BY trade_date DESC, id DESC LIMIT 50"
        ).fetchall()
        items = []
        for r in rows:
            item = dict_from_row(r)
            item["toolsUsed"] = json.loads(item.pop("tools_used") or "[]")
            items.append(item)
        return JSONResponse({"data": items}, headers=_NO_CACHE_HEADERS)
    finally:
        conn.close()


@router.delete("/admin/reports/{report_id}", summary="删除报告")
async def admin_delete_report(report_id: int, request: Request):
    _require_auth(request)
    conn = get_connection()
    try:
        conn.execute("DELETE FROM ai_reports WHERE id = ?", (report_id,))
        conn.commit()
        return JSONResponse({"data": "已删除"})
    finally:
        conn.close()