"""
认证 API
"""
from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession

from app.database import get_db
from app.api.deps import get_current_user
from app.models.user import User
from app.schemas.auth import (
    RegisterRequest,
    LoginRequest,
    LoginResponse,
    RefreshTokenRequest,
    RefreshTokenResponse,
    UserResponse,
)
from app.services.auth import (
    get_user_by_email,
    get_user_by_phone,
    get_user_by_id,
    create_user,
    authenticate_user,
    create_access_token,
    create_refresh_token,
    update_refresh_token,
    decode_token,
    get_user_organization_info,
)

router = APIRouter(prefix="/auth", tags=["认证"])


@router.post("/register", response_model=LoginResponse, status_code=status.HTTP_201_CREATED)
async def register(
    request: RegisterRequest,
    db: AsyncSession = Depends(get_db),
):
    """
    用户注册

    - 支持邮箱或手机号注册（至少提供一个）
    - 注册后自动登录，返回 Token
    """
    # 验证至少提供邮箱或手机号
    if not request.email and not request.phone:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="请提供邮箱或手机号",
        )

    # 检查邮箱是否已存在
    if request.email:
        existing = await get_user_by_email(db, request.email)
        if existing:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail="该邮箱已被注册",
            )

    # 检查手机号是否已存在
    if request.phone:
        existing = await get_user_by_phone(db, request.phone)
        if existing:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail="该手机号已被注册",
            )

    # 创建用户
    user = await create_user(
        db=db,
        email=request.email,
        phone=request.phone,
        password=request.password,
        name=request.name,
        role=request.role,
    )

    # 生成 Token
    access_token = create_access_token(user.id)
    refresh_token, refresh_expires_at = create_refresh_token(user.id)

    # 保存 refresh token
    await update_refresh_token(db, user, refresh_token, refresh_expires_at)
    await db.commit()

    # 获取组织信息
    org_info = await get_user_organization_info(db, user)

    return LoginResponse(
        access_token=access_token,
        refresh_token=refresh_token,
        user=UserResponse(
            id=user.id,
            email=user.email,
            phone=user.phone,
            name=user.name,
            avatar=user.avatar,
            role=user.role,
            is_verified=user.is_verified,
            **org_info,
        ),
    )


@router.post("/login", response_model=LoginResponse)
async def login(
    request: LoginRequest,
    db: AsyncSession = Depends(get_db),
):
    """
    用户登录

    - 支持邮箱+密码 或 手机号+密码 登录
    - 返回 accessToken 和 refreshToken
    """
    # 验证请求参数
    if not request.email and not request.phone:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="请提供邮箱或手机号",
        )

    if not request.password:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="请提供密码",
        )

    # 验证用户
    user = await authenticate_user(
        db=db,
        email=request.email,
        phone=request.phone,
        password=request.password,
    )

    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="邮箱/手机号或密码错误",
        )

    if not user.is_active:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="账号已被禁用",
        )

    # 生成 Token
    access_token = create_access_token(user.id)
    refresh_token, refresh_expires_at = create_refresh_token(user.id)

    # 保存 refresh token
    await update_refresh_token(db, user, refresh_token, refresh_expires_at)
    await db.commit()

    # 获取组织信息
    org_info = await get_user_organization_info(db, user)

    return LoginResponse(
        access_token=access_token,
        refresh_token=refresh_token,
        user=UserResponse(
            id=user.id,
            email=user.email,
            phone=user.phone,
            name=user.name,
            avatar=user.avatar,
            role=user.role,
            is_verified=user.is_verified,
            **org_info,
        ),
    )


@router.post("/refresh", response_model=RefreshTokenResponse)
async def refresh_token(
    request: RefreshTokenRequest,
    db: AsyncSession = Depends(get_db),
):
    """
    刷新 Access Token

    - 使用 refreshToken 获取新的 accessToken
    - refreshToken 有效期 7 天
    """
    # 解码 refresh token
    payload = decode_token(request.refresh_token)
    if not payload:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="无效的 refresh token",
        )

    if payload.get("type") != "refresh":
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="无效的 token 类型",
        )

    user_id = payload.get("sub")
    if not user_id:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="无效的 token",
        )

    # 获取用户
    user = await get_user_by_id(db, user_id)
    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="用户不存在",
        )

    # 验证 refresh token 是否匹配
    if user.refresh_token != request.refresh_token:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="refresh token 已失效",
        )

    if not user.is_active:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="账号已被禁用",
        )

    # 生成新的 access token
    access_token = create_access_token(user.id)

    return RefreshTokenResponse(access_token=access_token)


@router.post("/logout")
async def logout(
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """
    退出登录

    - 清除 refresh token，使其失效
    """
    current_user.refresh_token = None
    current_user.refresh_token_expires_at = None
    await db.commit()
    return {"message": "已退出登录"}