"""Git control operations with repo validation."""

import logging
import os
import uuid

from fastapi import HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession

from src.models.git_repository import GitRepository
from src.models.user import User
from src.schemas.git_repository import (
    BranchCreateRequest,
    CheckoutRequest,
    CommitRequest,
    FetchResponse,
    MergeRequest,
    MergeResponse,
    PullResponse,
    PushResponse,
    StatusResponse,
)
from src.services.git.repository import ensure_repo_on_disk, get_repo_and_validate
from src.utils.git_control import (
    checkout_branch,
    commit_changes,
    create_branch,
    delete_branch,
    fetch,
    get_status,
    merge,
    pull,
    push,
)

logger = logging.getLogger(__name__)


async def get_status_with_validation(
    session: AsyncSession,
    project_id: uuid.UUID,
    repo_id: uuid.UUID,
) -> StatusResponse:
    repo = await get_repo_and_validate(session, repo_id, project_id)
    ensure_repo_on_disk(repo)
    try:
        result = get_status(repo.path)
        return StatusResponse(
            branch=result.branch,
            modified=result.modified,
            added=result.added,
            deleted=result.deleted,
            untracked=result.untracked,
            renamed=result.renamed,
            ahead=result.ahead,
            behind=result.behind,
        )
    except RuntimeError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


async def create_branch_with_validation(
    session: AsyncSession,
    project_id: uuid.UUID,
    repo_id: uuid.UUID,
    data: BranchCreateRequest,
) -> dict:
    repo = await get_repo_and_validate(session, repo_id, project_id)
    ensure_repo_on_disk(repo)
    try:
        create_branch(repo.path, data.name, data.base_branch)
        return {"message": f"Branch '{data.name}' created", "branch": data.name}
    except RuntimeError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


async def delete_branch_with_validation(
    session: AsyncSession,
    project_id: uuid.UUID,
    repo_id: uuid.UUID,
    branch_name: str,
    force: bool = False,
) -> dict:
    repo = await get_repo_and_validate(session, repo_id, project_id)
    ensure_repo_on_disk(repo)
    try:
        delete_branch(repo.path, branch_name, force)
        return {"message": f"Branch '{branch_name}' deleted"}
    except RuntimeError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


async def checkout_branch_with_validation(
    session: AsyncSession,
    project_id: uuid.UUID,
    repo_id: uuid.UUID,
    data: CheckoutRequest,
) -> dict:
    repo = await get_repo_and_validate(session, repo_id, project_id)
    ensure_repo_on_disk(repo)
    try:
        checkout_branch(repo.path, data.branch)
        return {"message": f"Checked out branch '{data.branch}'", "branch": data.branch}
    except RuntimeError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


async def commit_changes_with_validation(
    session: AsyncSession,
    project_id: uuid.UUID,
    repo_id: uuid.UUID,
    data: CommitRequest,
    user: User,
) -> dict:
    repo = await get_repo_and_validate(session, repo_id, project_id)
    ensure_repo_on_disk(repo)
    author_name = user.name or "Unknown"
    author_email = user.email or "unknown@example.com"
    try:
        commit_hash = commit_changes(
            repo_path=repo.path,
            message=data.message,
            author_name=author_name,
            author_email=author_email,
            files=data.files,
        )
        return {"commit_hash": commit_hash, "message": data.message}
    except RuntimeError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


async def fetch_with_validation(
    session: AsyncSession,
    project_id: uuid.UUID,
    repo_id: uuid.UUID,
) -> FetchResponse:
    repo = await get_repo_and_validate(session, repo_id, project_id)
    ensure_repo_on_disk(repo)
    try:
        fetch(repo.path)
        return FetchResponse(message="Fetched from remote")
    except RuntimeError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


async def pull_with_validation(
    session: AsyncSession,
    project_id: uuid.UUID,
    repo_id: uuid.UUID,
    branch: str | None = None,
) -> PullResponse:
    repo = await get_repo_and_validate(session, repo_id, project_id)
    ensure_repo_on_disk(repo)
    try:
        pull(repo.path, branch)
        return PullResponse(message="Pulled from remote")
    except RuntimeError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


async def push_with_validation(
    session: AsyncSession,
    project_id: uuid.UUID,
    repo_id: uuid.UUID,
    branch: str | None = None,
) -> PushResponse:
    repo = await get_repo_and_validate(session, repo_id, project_id)
    ensure_repo_on_disk(repo)
    try:
        push(repo.path, branch)
        return PushResponse(message="Pushed to remote")
    except RuntimeError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


async def merge_with_validation(
    session: AsyncSession,
    project_id: uuid.UUID,
    repo_id: uuid.UUID,
    data: MergeRequest,
) -> MergeResponse:
    repo = await get_repo_and_validate(session, repo_id, project_id)
    ensure_repo_on_disk(repo)
    try:
        commit_hash = merge(
            repo_path=repo.path,
            source_branch=data.source_branch,
            target_branch=data.target_branch,
            message=data.message,
        )
        return MergeResponse(
            commit_hash=commit_hash,
            message=data.message or f"Merge {data.source_branch}",
        )
    except RuntimeError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))