"""用户路由"""

from datetime import datetime

from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
from pydantic import BaseModel

from app.dependencies import get_db, get_current_user
from app.models.user import User
from app.models.user_block import UserBlock
from app.schemas.user import (
    UserRead, UserProfile, UserUpdate, UserSearchResult,
    PasswordChange, EmailChange,
)
from app.services.user_service import UserService

router = APIRouter()


class StatusUpdate(BaseModel):
    custom_status: str | None = None
    status_emoji: str | None = None
    expires_hours: int | None = None


@router.get("/me", response_model=UserRead)
async def get_me(user: User = Depends(get_current_user)):
    """获取当前用户信息"""
    return user


@router.put("/me", response_model=UserRead)
async def update_me(
    req: UserUpdate,
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """更新当前用户信息"""
    service = UserService(db)
    updated = await service.update_profile(user.id, **req.model_dump(exclude_none=True))
    return updated


@router.put("/me/password")
async def change_password(
    req: PasswordChange,
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """修改密码"""
    service = UserService(db)
    try:
        await service.change_password(user.id, req.old_password, req.new_password)
        return {"success": True, "message": "密码修改成功"}
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))


@router.put("/me/email")
async def change_email(
    req: EmailChange,
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """更换绑定邮箱"""
    service = UserService(db)
    try:
        await service.change_email(user.id, req.email, req.password)
        return {"success": True, "message": "邮箱已更新"}
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))


@router.get("/search", response_model=list[UserSearchResult])
async def search_users(
    q: str = Query(..., min_length=1),
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """搜索用户"""
    service = UserService(db)
    users = await service.search_users(q, user.id)
    return users


@router.get("/{user_id}", response_model=UserProfile)
async def get_user(
    user_id: str,
    db: AsyncSession = Depends(get_db),
):
    """获取用户公开信息"""
    service = UserService(db)
    user = await service.get_by_id(user_id)
    if not user:
        raise HTTPException(status_code=404, detail="用户不存在")
    return user


@router.put("/me/status")
async def update_status(
    req: StatusUpdate,
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """设置个人心情状态（对外可见，可设过期）"""
    user.custom_status = req.custom_status or None
    user.status_emoji = req.status_emoji or None
    if req.expires_hours:
        from datetime import timedelta
        user.status_expires_at = datetime.utcnow() + timedelta(hours=req.expires_hours)
    else:
        user.status_expires_at = None
    await db.flush()
    return {
        "custom_status": user.custom_status,
        "status_emoji": user.status_emoji,
        "status_expires_at": user.status_expires_at.isoformat() if user.status_expires_at else None,
    }


@router.post("/{user_id}/block")
async def block_user(
    user_id: str,
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """拉黑用户"""
    if user_id == user.id:
        raise HTTPException(status_code=400, detail="不能拉黑自己")
    existing = await db.execute(
        select(UserBlock).where(UserBlock.blocker_id == user.id, UserBlock.blocked_id == user_id)
    )
    if not existing.scalars().first():
        import uuid
        db.add(UserBlock(id=str(uuid.uuid4()), blocker_id=user.id, blocked_id=user_id))
    return {"success": True}


@router.delete("/{user_id}/block")
async def unblock_user(
    user_id: str,
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """取消拉黑"""
    from sqlalchemy import delete as sql_delete
    await db.execute(
        sql_delete(UserBlock).where(UserBlock.blocker_id == user.id, UserBlock.blocked_id == user_id)
    )
    return {"success": True}


@router.get("/me/blocks")
async def list_blocks(
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """我的黑名单"""
    result = await db.execute(
        select(UserBlock).where(UserBlock.blocker_id == user.id)
    )
    blocks = []
    for b in result.scalars().all():
        u = await db.execute(select(User).where(User.id == b.blocked_id))
        bu = u.scalars().first()
        if bu:
            blocks.append({"user_id": bu.id, "username": bu.username, "nickname": bu.nickname})
    return blocks