import sys
from pathlib import Path
import shutil
import pytest
from unittest.mock import MagicMock, patch
from git.exc import InvalidGitRepositoryError

sys.path.insert(0, str(Path(__file__).parent.parent.parent))

from src.services.git_service import GitService
from src.core.superset_client import SupersetClient
from src.core.config_models import Environment

def test_git_service_get_repo_path_guard():
    """Verify that _get_repo_path raises ValueError if dashboard_id is None."""
    service = GitService(base_path="test_repos")
    with pytest.raises(ValueError, match="dashboard_id cannot be None"):
        service._get_repo_path(None)


def test_git_service_get_repo_path_recreates_base_dir():
    """Verify _get_repo_path recreates missing base directory before returning repo path."""
    service = GitService(base_path="test_repos_runtime_recreate")
    shutil.rmtree(service.base_path, ignore_errors=True)

    repo_path = service._get_repo_path(42)

    assert Path(service.base_path).is_dir()
    assert repo_path == str(Path(service.base_path) / "42")

def test_superset_client_import_dashboard_guard():
    """Verify that import_dashboard raises ValueError if file_name is None."""
    mock_env = Environment(
        id="test",
        name="test",
        url="http://localhost:8088",
        username="admin",
        password="admin"
    )
    client = SupersetClient(mock_env)
    with pytest.raises(ValueError, match="file_name cannot be None"):
        client.import_dashboard(None)


def test_git_service_init_repo_reclones_when_path_is_not_a_git_repo():
    """Verify init_repo reclones when target path exists but is not a valid Git repository."""
    service = GitService(base_path="test_repos_invalid_repo")
    target_path = Path(service.base_path) / "covid"
    target_path.mkdir(parents=True, exist_ok=True)
    (target_path / "placeholder.txt").write_text("not a git repo", encoding="utf-8")

    clone_result = MagicMock()
    with patch("src.services.git_service.Repo") as repo_ctor:
        repo_ctor.side_effect = InvalidGitRepositoryError("invalid repo")
        repo_ctor.clone_from.return_value = clone_result
        result = service.init_repo(10, "https://example.com/org/repo.git", "token", repo_key="covid")

    assert result is clone_result
    repo_ctor.assert_called_once_with(str(target_path))
    repo_ctor.clone_from.assert_called_once()
    assert not target_path.exists()


def test_git_service_ensure_gitflow_branches_creates_and_pushes_missing_defaults():
    """Verify _ensure_gitflow_branches creates dev/preprod locally and pushes them to origin."""
    service = GitService(base_path="test_repos_gitflow_defaults")

    class FakeRemoteRef:
        def __init__(self, remote_head):
            self.remote_head = remote_head

    class FakeHead:
        def __init__(self, name, commit):
            self.name = name
            self.commit = commit

    class FakeOrigin:
        def __init__(self):
            self.refs = [FakeRemoteRef("main")]
            self.pushed = []

        def fetch(self):
            return []

        def push(self, refspec=None):
            self.pushed.append(refspec)
            return []

    class FakeHeadPointer:
        def __init__(self, commit):
            self.commit = commit

    class FakeRepo:
        def __init__(self):
            self.head = FakeHeadPointer("main-commit")
            self.heads = [FakeHead("main", "main-commit")]
            self.origin = FakeOrigin()

        def create_head(self, name, commit):
            head = FakeHead(name, commit)
            self.heads.append(head)
            return head

        def remote(self, name="origin"):
            if name != "origin":
                raise ValueError("unknown remote")
            return self.origin

    repo = FakeRepo()
    service._ensure_gitflow_branches(repo, dashboard_id=10)

    local_branch_names = {head.name for head in repo.heads}
    assert {"main", "dev", "preprod"}.issubset(local_branch_names)
    assert "dev:dev" in repo.origin.pushed
    assert "preprod:preprod" in repo.origin.pushed