import uuid
from urllib.parse import urlparse
from repositories.pocketbase_client import pb_client
from repositories.repo_config import USE_MOCK_REPOSITORIES

COLLECTION = 'competitors'


def _extract_domain(url):
    """Strips scheme/path/www from a URL down to a bare domain for dedup comparisons."""
    netloc = urlparse(url if '://' in url else f'//{url}').netloc or url
    return netloc.lower().lstrip('www.')


class CompetitorRepository:
    """Data access for the `competitors` collection."""

    def get_by_domain(self, tenant_id, domain):
        """Used by CSV bulk import to skip duplicate competitors within a tenant."""
        candidates = pb_client.list(COLLECTION, filter_str=f'tenant_id = "{tenant_id}"', per_page=200)
        return next((c for c in candidates if _extract_domain(c.get('website', '')) == domain), None)

    def get_by_id(self, competitor_id):
        return pb_client.get_one(COLLECTION, competitor_id)

    def list_for_tenant(self, tenant_id, active_only=True):
        """Returns a tenant's competitors, active-only by default."""
        filter_str = f'tenant_id = "{tenant_id}"'
        if active_only:
            filter_str += ' && active = true'
        return pb_client.list(COLLECTION, filter_str=filter_str, per_page=200)

    def create(self, data):
        return pb_client.create(COLLECTION, data)

    def update(self, competitor_id, data):
        return pb_client.update(COLLECTION, competitor_id, data)


class MockCompetitorRepository:
    """In-memory stand-in for CompetitorRepository."""

    def __init__(self):
        self._records = {}

    def get_by_domain(self, tenant_id, domain):
        return next((
            r for r in self._records.values()
            if r.get('tenant_id') == tenant_id and _extract_domain(r.get('website', '')) == domain
        ), None)

    def get_by_id(self, competitor_id):
        return self._records.get(competitor_id)

    def list_for_tenant(self, tenant_id, active_only=True):
        return [
            r for r in self._records.values()
            if r.get('tenant_id') == tenant_id and (not active_only or r.get('active'))
        ]

    def create(self, data):
        record_id = data.get('id') or str(uuid.uuid4())
        record = {'id': record_id, 'active': True, 'change_detected': False, **data}
        self._records[record_id] = record
        return record

    def update(self, competitor_id, data):
        if competitor_id not in self._records:
            return None
        self._records[competitor_id] = {**self._records[competitor_id], **data}
        return self._records[competitor_id]


competitor_repository = MockCompetitorRepository() if USE_MOCK_REPOSITORIES else CompetitorRepository()