from openhands.integrations.gitlab.service.base import GitLabMixinBase
from openhands.integrations.service_types import OwnerType, ProviderType, Repository
from openhands.server.types import AppMode


class GitLabReposMixin(GitLabMixinBase):
    """
    Methods for interacting with GitLab repositories
    """

    def _parse_repository(
        self, repo: dict, link_header: str | None = None
    ) -> Repository:
        """Parse a GitLab API project response into a Repository object.

        Args:
            repo: Project data from GitLab API
            link_header: Optional link header for pagination

        Returns:
            Repository object
        """
        return Repository(
            id=str(repo.get('id')),  # type: ignore[arg-type]
            full_name=repo.get('path_with_namespace'),  # type: ignore[arg-type]
            stargazers_count=repo.get('star_count'),
            git_provider=ProviderType.GITLAB,
            is_public=repo.get('visibility') == 'public',
            owner_type=(
                OwnerType.ORGANIZATION
                if repo.get('namespace', {}).get('kind') == 'group'
                else OwnerType.USER
            ),
            link_header=link_header,
            main_branch=repo.get('default_branch'),
        )

    def _parse_gitlab_url(self, url: str) -> str | None:
        """Parse a GitLab URL to extract the repository path.

        Expected format: https://{domain}/{group}/{possibly_subgroup}/{repo}
        Returns the full path from group onwards (e.g., 'group/subgroup/repo' or 'group/repo')
        """
        try:
            # Remove protocol and domain
            if '://' in url:
                url = url.split('://', 1)[1]
            if '/' in url:
                path = url.split('/', 1)[1]
            else:
                return None

            # Clean up the path
            path = path.strip('/')
            if not path:
                return None

            # Split the path and remove empty parts
            path_parts = [part for part in path.split('/') if part]

            # We need at least 2 parts: group/repo
            if len(path_parts) < 2:
                return None

            # Join all parts to form the full repository path
            return '/'.join(path_parts)

        except Exception:
            return None

    async def search_repositories(
        self,
        query: str,
        per_page: int = 30,
        sort: str = 'updated',
        order: str = 'desc',
        public: bool = False,
        app_mode: AppMode = AppMode.OPENHANDS,
    ) -> list[Repository]:
        if public:
            # When public=True, query is a GitLab URL that we need to parse
            repo_path = self._parse_gitlab_url(query)
            if not repo_path:
                return []  # Invalid URL format

            repository = await self.get_repository_details_from_repo_name(repo_path)
            return [repository]

        return await self.get_paginated_repos(1, per_page, sort, None, query)

    async def get_paginated_repos(
        self,
        page: int,
        per_page: int,
        sort: str,
        installation_id: str | None,
        query: str | None = None,
    ) -> list[Repository]:
        url = f'{self.BASE_URL}/projects'
        order_by = {
            'pushed': 'last_activity_at',
            'updated': 'last_activity_at',
            'created': 'created_at',
            'full_name': 'name',
        }.get(sort, 'last_activity_at')

        params = {
            'page': str(page),
            'per_page': str(per_page),
            'order_by': order_by,
            'sort': 'desc',  # GitLab uses sort for direction (asc/desc)
            'membership': True,  # Include projects user is a member of
        }

        if query:
            params['search'] = query
            params['search_namespaces'] = True

        response, headers = await self._make_request(url, params)

        next_link: str = headers.get('Link', '')
        repos = [
            self._parse_repository(repo, link_header=next_link) for repo in response
        ]
        return repos

    async def get_all_repositories(
        self, sort: str, app_mode: AppMode
    ) -> list[Repository]:
        MAX_REPOS = 1000
        PER_PAGE = 100  # Maximum allowed by GitLab API
        all_repos: list[dict] = []
        page = 1

        url = f'{self.BASE_URL}/projects'
        # Map GitHub's sort values to GitLab's order_by values
        order_by = {
            'pushed': 'last_activity_at',
            'updated': 'last_activity_at',
            'created': 'created_at',
            'full_name': 'name',
        }.get(sort, 'last_activity_at')

        while len(all_repos) < MAX_REPOS:
            params = {
                'page': str(page),
                'per_page': str(PER_PAGE),
                'order_by': order_by,
                'sort': 'desc',  # GitLab uses sort for direction (asc/desc)
                'membership': 1,  # Use 1 instead of True
            }
            response, headers = await self._make_request(url, params)

            if not response:  # No more repositories
                break

            all_repos.extend(response)
            page += 1

            # Check if we've reached the last page
            link_header = headers.get('Link', '')
            if 'rel="next"' not in link_header:
                break

        # Trim to MAX_REPOS if needed and convert to Repository objects
        all_repos = all_repos[:MAX_REPOS]
        return [self._parse_repository(repo) for repo in all_repos]

    async def get_repository_details_from_repo_name(
        self, repository: str
    ) -> Repository:
        encoded_name = repository.replace('/', '%2F')

        url = f'{self.BASE_URL}/projects/{encoded_name}'
        repo, _ = await self._make_request(url)

        return self._parse_repository(repo)