from fastapi import APIRouter, Header

from app.dependencies import CurrentUser, DbSession, RedisClient
from app.schemas.auth import (
    HeartbeatRequest,
    HeartbeatResponse,
    LoginRequest,
    RegisterRequest,
    TokenResponse,
    UserPublic,
)
from app.schemas.common import ApiResponse
from app.services import auth as auth_service

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


@router.post("/register", response_model=ApiResponse[TokenResponse])
async def register(
    body: RegisterRequest,
    db: DbSession,
    redis: RedisClient,
    device_serial: str | None = Header(default=None, convert_underscores=False),
) -> ApiResponse[TokenResponse]:
    try:
        result = await auth_service.register_user(
            db,
            username=body.username,
            password=body.password,
            device_serial=device_serial,
        )
    except auth_service.AuthError as exc:
        return ApiResponse(ok=False, message=exc.message)

    await auth_service.store_session(redis, result.access_token, result.user.id)
    return ApiResponse(ok=True, message="注册成功", data=result)


@router.post("/login", response_model=ApiResponse[TokenResponse])
async def login(
    body: LoginRequest,
    db: DbSession,
    redis: RedisClient,
    device_serial: str | None = Header(default=None, convert_underscores=False),
) -> ApiResponse[TokenResponse]:
    try:
        result = await auth_service.login_user(
            db,
            username=body.username,
            password=body.password,
            device_serial=device_serial,
        )
    except auth_service.AuthError as exc:
        return ApiResponse(ok=False, message=exc.message)

    await auth_service.store_session(redis, result.access_token, result.user.id)
    return ApiResponse(ok=True, message="登录成功", data=result)


@router.post("/heartbeat", response_model=ApiResponse[HeartbeatResponse])
async def heartbeat(
    body: HeartbeatRequest,
    current_user: CurrentUser,
    db: DbSession,
    device_serial: str | None = Header(default=None, convert_underscores=False),
) -> ApiResponse[HeartbeatResponse]:
    try:
        data = await auth_service.process_heartbeat(
            db,
            current_user,
            device_serial,
            body.verify_code,
        )
    except auth_service.AuthError as exc:
        return ApiResponse(ok=False, message=exc.message)
    return ApiResponse(ok=True, message="", data=data)


@router.post("/logout", response_model=ApiResponse[None])
async def logout(
    redis: RedisClient,
    authorization: str | None = Header(default=None),
) -> ApiResponse[None]:
    if authorization and authorization.lower().startswith("bearer "):
        token = authorization[7:].strip()
        if token:
            await auth_service.revoke_session(redis, token)
    return ApiResponse(ok=True, message="已退出登录")


@router.get("/me", response_model=ApiResponse[UserPublic])
async def me(current_user: CurrentUser) -> ApiResponse[UserPublic]:
    return ApiResponse(
        ok=True,
        message="",
        data=UserPublic.model_validate(current_user),
    )