"""
项目Git仓库管理 API
"""
from fastapi import APIRouter, Depends, HTTPException, Request
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select, update, func

from app.core.database import get_db
from app.core.deps import get_current_user
from app.models.user import User
from app.models.git_repo import ProjectGitRepo
from app.schemas.git_repo import GitRepoCreate, GitRepoUpdate, GitRepoResponse, GitRepoTestRequest
from app.services.git_service import git_service
from app.schemas.response import success_response
from app.services.log_service import log_service
from app.services.project_service import require_project_read_access, require_project_roles
from app.core.enums import OperationType

router = APIRouter()


def _repo_response(repo: ProjectGitRepo) -> dict:
    data = GitRepoResponse.from_orm(repo).dict()
    data["token"] = None
    data["has_token"] = bool(repo.token)
    return data


@router.get("/projects/{project_id}/git-repos", response_model=dict)
async def get_project_git_repos(
    project_id: int,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """获取项目的Git仓库列表"""
    await require_project_read_access(db, project_id, current_user)

    result = await db.execute(
        select(ProjectGitRepo).where(ProjectGitRepo.project_id == project_id).order_by(ProjectGitRepo.created_at)
    )
    repos = result.scalars().all()
    
    # 隐藏 token
    data = []
    for repo in repos:
        data.append(_repo_response(repo))

    return success_response(data=data)


@router.post("/projects/{project_id}/git-repos", response_model=dict)
async def create_git_repo(
    project_id: int,
    repo_in: GitRepoCreate,
    request: Request,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """添加Git仓库"""
    await require_project_roles(
        db,
        project_id,
        current_user,
        allowed_roles=["admin", "editor"],
    )

    # 如果是设为默认，先取消其他默认
    if repo_in.is_default:
        await db.execute(
            update(ProjectGitRepo)
            .where(ProjectGitRepo.project_id == project_id)
            .values(is_default=0)
        )

    # 检查是否是第一个仓库，如果是，强制设为默认
    result = await db.execute(select(func.count()).select_from(ProjectGitRepo).where(ProjectGitRepo.project_id == project_id))
    count = result.scalar()
    is_default = repo_in.is_default
    if count == 0:
        is_default = 1

    db_repo = ProjectGitRepo(
        project_id=project_id,
        name=repo_in.name,
        repo_url=repo_in.repo_url,
        branch=repo_in.branch,
        username=repo_in.username,
        token=repo_in.token,
        is_default=is_default,
        sync_path=""
    )
    db.add(db_repo)
    await db.commit()
    await db.refresh(db_repo)

    return success_response(data=_repo_response(db_repo), message="Git仓库添加成功")


@router.post("/projects/{project_id}/git-repos/test-connection", response_model=dict)
async def test_git_repo_connection(
    project_id: int,
    repo_in: GitRepoTestRequest,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """Test remote repository access without saving configuration or changing project files."""
    await require_project_roles(
        db,
        project_id,
        current_user,
        allowed_roles=["admin", "editor"],
    )

    saved_repo = None
    if repo_in.repo_id:
        result = await db.execute(
            select(ProjectGitRepo).where(
                ProjectGitRepo.id == repo_in.repo_id,
                ProjectGitRepo.project_id == project_id,
            )
        )
        saved_repo = result.scalar_one_or_none()
        if not saved_repo:
            raise HTTPException(status_code=404, detail="仓库不存在")

    repo_url = repo_in.repo_url or (saved_repo.repo_url if saved_repo else None)
    branch = repo_in.branch or (saved_repo.branch if saved_repo else "main")
    username = repo_in.username if repo_in.username is not None else (saved_repo.username if saved_repo else None)
    token = repo_in.token or (saved_repo.token if saved_repo else None)

    success, message = await git_service.test_connection(repo_url, branch, username, token)
    if not success:
        raise HTTPException(status_code=400, detail=f"远端仓库认证失败：{message}")
    return success_response(message="远端仓库认证成功")


@router.put("/projects/{project_id}/git-repos/{repo_id}", response_model=dict)
async def update_git_repo(
    project_id: int,
    repo_id: int,
    repo_in: GitRepoUpdate,
    request: Request,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """更新Git仓库"""
    await require_project_roles(
        db,
        project_id,
        current_user,
        allowed_roles=["admin", "editor"],
    )

    result = await db.execute(select(ProjectGitRepo).where(ProjectGitRepo.id == repo_id, ProjectGitRepo.project_id == project_id))
    repo = result.scalar_one_or_none()
    
    if not repo:
        raise HTTPException(status_code=404, detail="仓库不存在")

    # 如果设为默认，取消其他默认
    if repo_in.is_default == 1:
        await db.execute(
            update(ProjectGitRepo)
            .where(ProjectGitRepo.project_id == project_id)
            .values(is_default=0)
        )

    update_data = repo_in.dict(exclude_unset=True)
    # token 不回显；编辑时留空表示继续使用已保存凭据。
    if not update_data.get("token"):
        update_data.pop("token", None)
    for field, value in update_data.items():
        setattr(repo, field, value)

    await db.commit()
    await db.refresh(repo)

    return success_response(data=_repo_response(repo), message="更新成功")


@router.delete("/projects/{project_id}/git-repos/{repo_id}", response_model=dict)
async def delete_git_repo(
    project_id: int,
    repo_id: int,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """删除Git仓库"""
    await require_project_roles(
        db,
        project_id,
        current_user,
        allowed_roles=["admin", "editor"],
    )

    result = await db.execute(select(ProjectGitRepo).where(ProjectGitRepo.id == repo_id, ProjectGitRepo.project_id == project_id))
    repo = result.scalar_one_or_none()
    
    if not repo:
        raise HTTPException(status_code=404, detail="仓库不存在")

    await db.delete(repo)
    await db.commit()

    return success_response(message="删除成功")