"""
项目管理相关 API
"""
from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select, or_
from typing import List
import uuid

from app.core.database import get_db
from app.core.deps import get_current_user
from app.models.user import User
from app.models.project import Project, ProjectMember, ProjectMemberRole
from app.schemas.project import (
    ProjectCreate,
    ProjectUpdate,
    ProjectResponse,
    ProjectMemberAdd,
    ProjectMemberUpdate,
    ProjectMemberResponse,
    ProjectShareSettings,
    ProjectShareInfo,
)
from app.schemas.response import success_response
from app.services.storage import storage_service

router = APIRouter()


@router.get("/", response_model=dict)
async def get_my_projects(
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """获取我的项目列表（包括创建的和协作的）"""
    # 查询我创建的项目
    owned_result = await db.execute(
        select(Project).where(Project.owner_id == current_user.id, Project.status == 1)
    )
    owned_projects = owned_result.scalars().all()

    # 查询我协作的项目
    member_result = await db.execute(
        select(Project)
        .join(ProjectMember, ProjectMember.project_id == Project.id)
        .where(
            ProjectMember.user_id == current_user.id,
            Project.owner_id != current_user.id,
            Project.status == 1
        )
    )
    member_projects = member_result.scalars().all()

    # 合并结果
    all_projects = owned_projects + member_projects
    projects_data = [ProjectResponse.from_orm(p).dict() for p in all_projects]

    return success_response(data=projects_data)


@router.post("/", response_model=dict)
async def create_project(
    project_in: ProjectCreate,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """创建新项目"""
    # 生成 UUID 作为存储键
    storage_key = str(uuid.uuid4())

    # 创建项目记录
    db_project = Project(
        name=project_in.name,
        description=project_in.description,
        storage_key=storage_key,
        owner_id=current_user.id,
        is_public=project_in.is_public,
        status=1,
    )
    db.add(db_project)
    await db.commit()
    await db.refresh(db_project)

    # 创建物理文件夹结构
    try:
        storage_service.create_project_structure(storage_key)
    except Exception as e:
        # 如果文件夹创建失败，回滚数据库记录
        await db.delete(db_project)
        await db.commit()
        raise HTTPException(status_code=500, detail=f"项目文件夹创建失败: {str(e)}")

    # 添加项目所有者为管理员成员
    db_member = ProjectMember(
        project_id=db_project.id,
        user_id=current_user.id,
        role=ProjectMemberRole.ADMIN,
    )
    db.add(db_member)
    await db.commit()

    project_data = ProjectResponse.from_orm(db_project)
    return success_response(data=project_data.dict(), message="项目创建成功")


@router.get("/{project_id}", response_model=dict)
async def get_project(
    project_id: int,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """获取项目详情"""
    # 查询项目
    result = await db.execute(select(Project).where(Project.id == project_id))
    project = result.scalar_one_or_none()

    if not project:
        raise HTTPException(status_code=404, detail="项目不存在")

    # 检查权限（项目所有者或成员可访问）
    if project.owner_id != current_user.id:
        member_result = await db.execute(
            select(ProjectMember).where(
                ProjectMember.project_id == project_id,
                ProjectMember.user_id == current_user.id
            )
        )
        member = member_result.scalar_one_or_none()
        if not member and project.is_public != 1:
            raise HTTPException(status_code=403, detail="无权访问该项目")

    # 增加访问次数
    project.visit_count += 1
    await db.commit()

    project_data = ProjectResponse.from_orm(project)
    return success_response(data=project_data.dict())


@router.put("/{project_id}", response_model=dict)
async def update_project(
    project_id: int,
    project_in: ProjectUpdate,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """更新项目信息"""
    # 查询项目
    result = await db.execute(select(Project).where(Project.id == project_id))
    project = result.scalar_one_or_none()

    if not project:
        raise HTTPException(status_code=404, detail="项目不存在")

    # 只有项目所有者可以更新
    if project.owner_id != current_user.id:
        raise HTTPException(status_code=403, detail="无权修改该项目")

    # 更新字段
    update_data = project_in.dict(exclude_unset=True)
    for field, value in update_data.items():
        setattr(project, field, value)

    await db.commit()
    await db.refresh(project)

    project_data = ProjectResponse.from_orm(project)
    return success_response(data=project_data.dict(), message="项目更新成功")


@router.delete("/{project_id}", response_model=dict)
async def delete_project(
    project_id: int,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """删除项目（归档）"""
    # 查询项目
    result = await db.execute(select(Project).where(Project.id == project_id))
    project = result.scalar_one_or_none()

    if not project:
        raise HTTPException(status_code=404, detail="项目不存在")

    # 只有项目所有者可以删除
    if project.owner_id != current_user.id:
        raise HTTPException(status_code=403, detail="无权删除该项目")

    # 软删除（归档）
    project.status = 0
    await db.commit()

    return success_response(message="项目已归档")


@router.get("/{project_id}/members", response_model=dict)
async def get_project_members(
    project_id: int,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """获取项目成员列表"""
    # 查询项目
    result = await db.execute(select(Project).where(Project.id == project_id))
    project = result.scalar_one_or_none()

    if not project:
        raise HTTPException(status_code=404, detail="项目不存在")

    # 检查权限
    if project.owner_id != current_user.id:
        member_result = await db.execute(
            select(ProjectMember).where(
                ProjectMember.project_id == project_id,
                ProjectMember.user_id == current_user.id
            )
        )
        member = member_result.scalar_one_or_none()
        if not member:
            raise HTTPException(status_code=403, detail="无权访问该项目")

    # 查询成员列表
    members_result = await db.execute(
        select(ProjectMember).where(ProjectMember.project_id == project_id)
    )
    members = members_result.scalars().all()

    members_data = [ProjectMemberResponse.from_orm(m).dict() for m in members]
    return success_response(data=members_data)


@router.post("/{project_id}/members", response_model=dict)
async def add_project_member(
    project_id: int,
    member_in: ProjectMemberAdd,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """添加项目成员"""
    # 查询项目
    result = await db.execute(select(Project).where(Project.id == project_id))
    project = result.scalar_one_or_none()

    if not project:
        raise HTTPException(status_code=404, detail="项目不存在")

    # 只有项目所有者和管理员可以添加成员
    if project.owner_id != current_user.id:
        member_result = await db.execute(
            select(ProjectMember).where(
                ProjectMember.project_id == project_id,
                ProjectMember.user_id == current_user.id,
                ProjectMember.role == ProjectMemberRole.ADMIN
            )
        )
        member = member_result.scalar_one_or_none()
        if not member:
            raise HTTPException(status_code=403, detail="无权添加成员")

    # 检查用户是否已是成员
    existing_result = await db.execute(
        select(ProjectMember).where(
            ProjectMember.project_id == project_id,
            ProjectMember.user_id == member_in.user_id
        )
    )
    existing_member = existing_result.scalar_one_or_none()
    if existing_member:
        raise HTTPException(status_code=400, detail="用户已是项目成员")

    # 添加成员
    db_member = ProjectMember(
        project_id=project_id,
        user_id=member_in.user_id,
        role=member_in.role,
        invited_by=current_user.id,
    )
    db.add(db_member)
    await db.commit()
    await db.refresh(db_member)

    member_data = ProjectMemberResponse.from_orm(db_member)
    return success_response(data=member_data.dict(), message="成员添加成功")


@router.get("/{project_id}/share", response_model=dict)
async def get_project_share_info(
    project_id: int,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """获取项目分享信息"""
    # 查询项目
    result = await db.execute(select(Project).where(Project.id == project_id))
    project = result.scalar_one_or_none()

    if not project:
        raise HTTPException(status_code=404, detail="项目不存在")

    # 只有项目所有者可以获取分享信息
    if project.owner_id != current_user.id:
        raise HTTPException(status_code=403, detail="只有项目所有者可以查看分享信息")

    # 构建分享链接
    share_url = f"/preview/{project_id}"

    share_info = ProjectShareInfo(
        share_url=share_url,
        has_password=bool(project.access_pass),
        access_pass=project.access_pass  # 返回实际密码给项目所有者
    )

    return success_response(data=share_info.dict())


@router.post("/{project_id}/share/settings", response_model=dict)
async def update_share_settings(
    project_id: int,
    settings: ProjectShareSettings,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """更新分享设置（设置或取消访问密码）"""
    # 查询项目
    result = await db.execute(select(Project).where(Project.id == project_id))
    project = result.scalar_one_or_none()

    if not project:
        raise HTTPException(status_code=404, detail="项目不存在")

    # 只有项目所有者可以修改分享设置
    if project.owner_id != current_user.id:
        raise HTTPException(status_code=403, detail="只有项目所有者可以修改分享设置")

    # 更新访问密码
    project.access_pass = settings.access_pass
    await db.commit()

    message = "访问密码已取消" if not settings.access_pass else "访问密码已设置"
    return success_response(message=message)