"""配置管理 API：读写 config 表（MAIRUI_LICENCE / XUEQIU_TOKEN 等可视化配置）。

凭证类配置（MAIRUI_LICENCE / XUEQIU_TOKEN）写到 config 表后,可在下次
任务运行时通过 settings 重新读取(注: 当前代码是 os.environ.get 一启动就
固化,改 config 表不会立即生效 — 见 README 说明)。
"""
from __future__ import annotations

from typing import Optional

from fastapi import APIRouter, Body, HTTPException, Query

from app.core.db import ops as db_ops
from app.core.db.models import Config

router = APIRouter(prefix="/api/config", tags=["config"])


# 已知凭证类配置: 写入时建议显示为占位符,读出时也建议脱敏
SENSITIVE_KEYS = {"MAIRUI_LICENCE", "XUEQIU_TOKEN", "MAIRUI_RPS_LIMIT"}


def _mask(key: str, value: str) -> str:
    """凭证类配置显示前 8 位 + ***。"""
    if key in SENSITIVE_KEYS and value:
        if len(value) <= 8:
            return "*" * len(value)
        return value[:8] + "***"
    return value


@router.get("/")
def list_configs(
    category: Optional[str] = Query(None),
    search: Optional[str] = Query(None, description="按 key 模糊搜索"),
):
    """列出所有 config 项。凭证类自动脱敏。"""
    rows = db_ops.fetch_all_config()
    if category:
        rows = [r for r in rows if r.get("category") == category]
    if search:
        s = search.lower()
        rows = [r for r in rows if s in r["key"].lower()]
    # 脱敏
    for r in rows:
        r["value"] = _mask(r["key"], r.get("value", ""))
    return {"count": len(rows), "configs": rows}


@router.get("/{key}")
def get_config(key: str):
    r = db_ops.fetch_config_by_key(key)
    if not r:
        raise HTTPException(status_code=404, detail=f"config {key!r} not found")
    r["value"] = _mask(key, r.get("value", ""))
    return r


@router.put("/{key}")
def upsert_config(
    key: str,
    body: dict = Body(...),
):
    """新建或更新一条 config。"""
    value = body.get("value", "")
    category = body.get("category", "general")
    description = body.get("description", "")
    if not isinstance(value, str):
        raise HTTPException(status_code=400, detail="value must be a string")
    db_ops.upsert_config(key=key, value=value, category=category, description=description)
    return {"ok": True, "key": key}


@router.delete("/{key}")
def delete_config(key: str):
    db_ops.delete_config(key)
    return {"ok": True, "key": key}


@router.get("/categories/list")
def list_categories():
    """返回所有 category（用于前端下拉）。"""
    from sqlalchemy import distinct, select
    with db_ops.get_session() as s:
        cats = s.execute(select(distinct(Config.category))).scalars().all()
    return {"categories": sorted([c for c in cats if c])}


@router.post("/reload")
def reload_from_env():
    """把 .env / 环境变量里的已知配置回填到 config 表（覆盖式）。"""
    import os
    from app.core.config import settings

    # 已知 env-driven 配置项
    env_keys = [
        ("MAIRUI_LICENCE", os.environ.get("MAIRUI_LICENCE", ""), "general", "麦蕊智数 licence"),
        ("XUEQIU_TOKEN", os.environ.get("XUEQIU_TOKEN", ""), "credential", "雪球 token (含 xq_a_token=...;u=...)"),
        ("MAIRUI_RPS_LIMIT", os.environ.get("MAIRUI_RPS_LIMIT", ""), "tuning", "麦蕊智数 RPS 限速"),
        ("DS_BAOSTOCK_ENABLED", str(settings.ds_baostock_enabled).lower(), "datasource", "baostock 开关"),
        ("DS_SINA_ENABLED", str(settings.ds_sina_enabled).lower(), "datasource", "新浪 开关"),
        ("TRADING_HOLIDAYS", settings.trading_holidays, "trading_calendar", "A 股休市日 (YYYY-MM-DD,逗号分隔)"),
        ("API_PORT", str(settings.api_port), "api", "API 监听端口"),
        ("SCHEDULER_TICK_SECONDS", str(settings.scheduler_tick_seconds), "scheduler", "调度器扫描间隔"),
    ]

    n = 0
    for key, value, cat, desc in env_keys:
        if not value:
            continue
        db_ops.upsert_config(key=key, value=value, category=cat, description=desc)
        n += 1
    return {"ok": True, "synced": n}


@router.get("/page")
def config_page():
    """配置页 HTML 入口（前端单文件 SPA）。"""
    from fastapi.responses import RedirectResponse
    return RedirectResponse(url="/static/config.html")