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import '../config/environment_config.dart';
import '../models/coves_session.dart';
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import '../providers/vote_provider.dart' show VoteState;
import 'api_exceptions.dart';
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/// 1. Unseals the token to get the actual access/refresh tokens
/// 2. Uses stored DPoP keys to sign requests
/// 3. Writes to the user's PDS on their behalf
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/// 4. Handles toggle logic (creating, deleting, or switching vote direction)
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/// TODO: Backend vote endpoints need to be implemented:
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/// - POST /xrpc/social.coves.feed.vote.create
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/// - POST /xrpc/social.coves.feed.vote.delete
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/// - GET /xrpc/social.coves.feed.vote.list (or included in feed response)
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/// **Backend Endpoints**:
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/// - POST /xrpc/social.coves.feed.vote.create - Creates, toggles, or switches votes
Future<CovesSession?> Function()? sessionGetter,
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/// Collection name for vote records
static const String voteCollection = 'social.coves.feed.vote';
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/// Get all votes for the current user
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/// TODO: This needs a backend endpoint to list user's votes.
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/// For now, returns empty map - votes will be fetched with feed data.
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/// - `Map<String, VoteInfo>` where key is the post URI
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/// - Empty map if not authenticated or no votes found
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Future<Map<String, VoteInfo>> getUserVotes() async {
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final userDid = _didGetter?.call();
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if (userDid == null || userDid.isEmpty) {
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final session = await _sessionGetter?.call();
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if (session == null) {
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// TODO: Implement backend endpoint for listing user votes
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// For now, vote state should come from feed responses
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'⚠️ getUserVotes: Backend endpoint not yet implemented. '
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'Vote state should come from feed responses.',
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} on Exception catch (e) {
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debugPrint('⚠️ Failed to load user votes: $e');
/// Create or toggle vote
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/// Sends vote request to the Coves backend, which proxies to the user's PDS.
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/// Sends vote request to the Coves backend, which handles toggle logic.
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/// The backend will create a vote if none exists, or toggle it off if
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/// voting the same direction again.
/// - [postUri]: AT-URI of the post
/// - [postCid]: Content ID of the post (for strong reference)
/// - [direction]: Vote direction - "up" for like/upvote, "down" for downvote
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/// - [existingVoteRkey]: Optional rkey from cached state
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/// - [existingVoteDirection]: Optional direction from cached state
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/// - VoteResponse with uri/cid/rkey if created
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/// - VoteResponse with deleted=true if toggled off
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/// - VoteResponse with uri/cid/rkey if vote was created
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/// - VoteResponse with deleted=true if vote was toggled off (empty uri/cid)
/// - ApiException for API errors
···
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String? existingVoteRkey,
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String? existingVoteDirection,
final userDid = _didGetter?.call();
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debugPrint(' Direction: $direction');
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// Determine if this is a toggle (delete) or create
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final isToggleOff =
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existingVoteRkey != null && existingVoteDirection == direction;
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// Delete existing vote
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return _deleteVote(session: session, rkey: existingVoteRkey);
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// If switching direction, delete old vote first
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if (existingVoteRkey != null && existingVoteDirection != null) {
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debugPrint(' Switching vote direction - deleting old vote first');
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await _deleteVote(session: session, rkey: existingVoteRkey);
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// Create new vote via backend
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// Send vote request to backend
// Note: Authorization header is added by the interceptor
final response = await _dio.post<Map<String, dynamic>>(
'/xrpc/social.coves.feed.vote.create',
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final uri = data['uri'] as String?;
final cid = data['cid'] as String?;
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if (uri == null || cid == null) {
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throw ApiException('Invalid response from server - missing uri or cid');
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// If uri/cid are empty, the backend toggled off an existing vote
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if (uri == null || uri.isEmpty || cid == null || cid.isEmpty) {
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debugPrint('✅ Vote toggled off (deleted)');
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return const VoteResponse(deleted: true);
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// Extract rkey from URI
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final rkey = uri.split('/').last;
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// Extract rkey from URI using shared utility
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final rkey = VoteState.extractRkeyFromUri(uri);
debugPrint('✅ Vote created: $uri');
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throw ApiException('Failed to create vote: $e');
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/// Delete vote via backend
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Future<VoteResponse> _deleteVote({
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required CovesSession session,
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required String rkey,
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// Note: Authorization header is added by the interceptor
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await _dio.post<void>(
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'/xrpc/social.coves.feed.vote.delete',
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data: {'rkey': rkey},
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debugPrint('✅ Vote deleted');
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return const VoteResponse(deleted: true);
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} on DioException catch (e) {
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debugPrint('❌ Delete vote failed: ${e.message}');
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throw ApiException(
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'Failed to delete vote: ${e.message}',
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statusCode: e.response?.statusCode,
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/// Whether the vote was deleted (toggled off)
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/// Represents a vote that already exists on the PDS.
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class ExistingVote {
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const ExistingVote({required this.direction, required this.rkey});
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/// Vote direction ("up" or "down")
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final String direction;
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/// Record key for deletion
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/// Information about a user's vote on a post, returned from getUserVotes().
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required this.direction,
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required this.voteUri,
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required this.rkey,
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/// Vote direction ("up" or "down")
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final String direction;
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/// AT-URI of the vote record
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final String voteUri;
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/// Record key (rkey) - last segment of URI
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