"""配置加载。

凭据解析优先级：环境变量 QT_PASSWORD > Windows DPAPI 文件 > 配置文件明文 > 交互输入。
配置文件默认 config/config.json（已在 .gitignore 中）。
"""

from __future__ import annotations

import getpass
import json
import os
from dataclasses import dataclass, field
from pathlib import Path

DEFAULT_CONFIG = "config/config.json"


@dataclass
class Config:
    # 连接
    base_url: str
    username: str
    password: str = field(default="", repr=False)
    timeout: int = 60
    # 业务
    team_name: str = "当前项目"
    work_dir: str = ""
    sprint: str = ""
    start_time: str = ""
    end_time: str = ""
    content_desc: str = "需求开发测试"
    service_type: str = "DevelopService"
    belong_team: str = ""
    # 三个责任人；留空则用登录用户的真实姓名
    evaluator: str = ""
    technical_leader: str = ""
    customer_leader: str = ""
    # TFS
    tfs_project: str = "Tools_Dev"
    tfs_team: str = "DataTechnologies"
    area_path: str = ""
    iteration_path: str = ""
    # 运行
    workers: int = 2
    db_path: str = "state/qtimport.db"

    def resolved_roles(self, operator: str) -> tuple[str, str, str]:
        """三个责任人，缺省都落到操作人（与现有脚本一致）。"""
        return (
            self.evaluator or operator,
            self.technical_leader or operator,
            self.customer_leader or operator,
        )

    @classmethod
    def load(cls, path: str | os.PathLike = DEFAULT_CONFIG, *, need_password: bool = True) -> "Config":
        file_path = Path(path)
        if not file_path.exists():
            raise SystemExit(f"缺少配置文件：{file_path}（可从 config/config.example.json 复制）")
        with open(file_path, encoding="utf-8-sig") as handle:
            raw = json.load(handle)

        allowed = {f for f in cls.__dataclass_fields__}
        unknown = set(raw) - allowed
        if unknown:
            raise SystemExit(f"配置文件含未知字段：{sorted(unknown)}")
        cfg = cls(**raw)

        cfg.password = resolve_password(cfg.password, need=need_password)
        if not cfg.base_url or not cfg.username:
            raise SystemExit("配置缺少 base_url 或 username")
        if need_password and not cfg.password:
            raise SystemExit("未提供密码：设置 QT_PASSWORD 环境变量或在配置中填写")
        return cfg


def resolve_password(configured: str, *, need: bool = True) -> str:
    env = os.environ.get("QT_PASSWORD")
    if env:
        return env
    if configured and configured != "REPLACE_ME":
        return configured
    if not need:
        return ""
    if not os.isatty(0):  # 非交互（计划任务/CI）
        return ""
    return getpass.getpass("QuickTeam 密码：")


def load_raw(path: str | os.PathLike = DEFAULT_CONFIG) -> dict:
    """读原始 JSON（plan 阶段不需要密码时用）。"""
    with open(Path(path), encoding="utf-8-sig") as handle:
        return json.load(handle)