import 'package:flutter_test/flutter_test.dart';
import 'package:social_app/features/chat/data/models/ag_ui_event.dart';

void main() {
  group('agUiEventTypeFromWire', () {
    test('maps RUN_STARTED correctly', () {
      expect(agUiEventTypeFromWire('RUN_STARTED'), AgUiEventType.runStarted);
    });

    test('maps RUN_FINISHED correctly', () {
      expect(agUiEventTypeFromWire('RUN_FINISHED'), AgUiEventType.runFinished);
    });

    test('maps RUN_ERROR correctly', () {
      expect(agUiEventTypeFromWire('RUN_ERROR'), AgUiEventType.runError);
    });

    test('maps TEXT_MESSAGE_START correctly', () {
      expect(
        agUiEventTypeFromWire('TEXT_MESSAGE_START'),
        AgUiEventType.textMessageStart,
      );
    });

    test('maps TEXT_MESSAGE_CONTENT correctly', () {
      expect(
        agUiEventTypeFromWire('TEXT_MESSAGE_CONTENT'),
        AgUiEventType.textMessageContent,
      );
    });

    test('maps TEXT_MESSAGE_END correctly', () {
      expect(
        agUiEventTypeFromWire('TEXT_MESSAGE_END'),
        AgUiEventType.textMessageEnd,
      );
    });

    test('maps TOOL_CALL_START correctly', () {
      expect(
        agUiEventTypeFromWire('TOOL_CALL_START'),
        AgUiEventType.toolCallStart,
      );
    });

    test('maps TOOL_CALL_ARGS correctly', () {
      expect(
        agUiEventTypeFromWire('TOOL_CALL_ARGS'),
        AgUiEventType.toolCallArgs,
      );
    });

    test('maps TOOL_CALL_END correctly', () {
      expect(agUiEventTypeFromWire('TOOL_CALL_END'), AgUiEventType.toolCallEnd);
    });

    test('maps TOOL_CALL_RESULT correctly', () {
      expect(
        agUiEventTypeFromWire('TOOL_CALL_RESULT'),
        AgUiEventType.toolCallResult,
      );
    });

    test('maps TOOL_CALL_ERROR correctly', () {
      expect(
        agUiEventTypeFromWire('TOOL_CALL_ERROR'),
        AgUiEventType.toolCallError,
      );
    });

    test('maps STATE_SNAPSHOT correctly', () {
      expect(
        agUiEventTypeFromWire('STATE_SNAPSHOT'),
        AgUiEventType.stateSnapshot,
      );
    });

    test('returns unknown for unknown type', () {
      expect(agUiEventTypeFromWire('UNKNOWN_TYPE'), AgUiEventType.unknown);
    });

    test('returns unknown for empty string', () {
      expect(agUiEventTypeFromWire(''), AgUiEventType.unknown);
    });
  });

  group('agUiEventTypeToWire', () {
    test('maps runStarted to RUN_STARTED', () {
      expect(agUiEventTypeToWire(AgUiEventType.runStarted), 'RUN_STARTED');
    });

    test('maps runFinished to RUN_FINISHED', () {
      expect(agUiEventTypeToWire(AgUiEventType.runFinished), 'RUN_FINISHED');
    });

    test('maps textMessageStart to TEXT_MESSAGE_START', () {
      expect(
        agUiEventTypeToWire(AgUiEventType.textMessageStart),
        'TEXT_MESSAGE_START',
      );
    });

    test('maps unknown to empty string', () {
      expect(agUiEventTypeToWire(AgUiEventType.unknown), '');
    });
  });

  group('AgUiEvent.fromJson', () {
    test('parses RunStartedEvent', () {
      final json = {
        'type': 'RUN_STARTED',
        'threadId': 'thread_123',
        'runId': 'run_456',
      };

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<RunStartedEvent>());
      final runStarted = event as RunStartedEvent;
      expect(runStarted.threadId, 'thread_123');
      expect(runStarted.runId, 'run_456');
    });

    test('parses RunFinishedEvent', () {
      final json = {
        'type': 'RUN_FINISHED',
        'threadId': 'thread_123',
        'runId': 'run_456',
      };

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<RunFinishedEvent>());
      final runFinished = event as RunFinishedEvent;
      expect(runFinished.threadId, 'thread_123');
    });

    test('parses RunErrorEvent', () {
      final json = {
        'type': 'RUN_ERROR',
        'message': 'Something went wrong',
        'code': 'ERR_001',
      };

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<RunErrorEvent>());
      final runError = event as RunErrorEvent;
      expect(runError.message, 'Something went wrong');
      expect(runError.code, 'ERR_001');
    });

    test('parses TextMessageStartEvent', () {
      final json = {
        'type': 'TEXT_MESSAGE_START',
        'messageId': 'msg_123',
        'role': 'assistant',
      };

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<TextMessageStartEvent>());
      final textStart = event as TextMessageStartEvent;
      expect(textStart.messageId, 'msg_123');
      expect(textStart.role, 'assistant');
    });

    test('parses TextMessageContentEvent', () {
      final json = {
        'type': 'TEXT_MESSAGE_CONTENT',
        'messageId': 'msg_123',
        'delta': 'Hello',
      };

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<TextMessageContentEvent>());
      final textContent = event as TextMessageContentEvent;
      expect(textContent.messageId, 'msg_123');
      expect(textContent.delta, 'Hello');
    });

    test('parses TextMessageEndEvent', () {
      final json = {'type': 'TEXT_MESSAGE_END', 'messageId': 'msg_123'};

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<TextMessageEndEvent>());
      final textEnd = event as TextMessageEndEvent;
      expect(textEnd.messageId, 'msg_123');
    });

    test('parses ToolCallStartEvent', () {
      final json = {
        'type': 'TOOL_CALL_START',
        'toolCallId': 'tc_123',
        'toolCallName': 'back.mutate_calendar_event',
        'parentMessageId': 'msg_001',
      };

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<ToolCallStartEvent>());
      final toolStart = event as ToolCallStartEvent;
      expect(toolStart.toolCallId, 'tc_123');
      expect(toolStart.toolCallName, 'back.mutate_calendar_event');
      expect(toolStart.parentMessageId, 'msg_001');
    });

    test('parses ToolCallArgsEvent', () {
      final json = {
        'type': 'TOOL_CALL_ARGS',
        'toolCallId': 'tc_123',
        'delta': '{"title": "test"}',
      };

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<ToolCallArgsEvent>());
      final toolArgs = event as ToolCallArgsEvent;
      expect(toolArgs.toolCallId, 'tc_123');
      expect(toolArgs.delta, '{"title": "test"}');
    });

    test('parses ToolCallEndEvent', () {
      final json = {'type': 'TOOL_CALL_END', 'toolCallId': 'tc_123'};

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<ToolCallEndEvent>());
    });

    test('parses ToolCallResultEvent', () {
      final json = {
        'type': 'TOOL_CALL_RESULT',
        'messageId': 'msg_123',
        'toolCallId': 'tc_123',
        'content': '{"result":{"ok":true,"eventId":"evt_001"}}',
      };

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<ToolCallResultEvent>());
      final toolResult = event as ToolCallResultEvent;
      expect(toolResult.messageId, 'msg_123');
      expect(toolResult.toolCallId, 'tc_123');
      expect(toolResult.result['ok'], true);
    });

    test('parses ToolCallResultEvent content payload', () {
      final json = {
        'type': 'TOOL_CALL_RESULT',
        'messageId': 'msg_123',
        'toolCallId': 'tc_123',
        'content': '{"result":{"ok":true,"eventId":"evt_001"}}',
      };

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<ToolCallResultEvent>());
      final toolResult = event as ToolCallResultEvent;
      expect(toolResult.messageId, 'msg_123');
      expect(toolResult.toolCallId, 'tc_123');
      expect(toolResult.result['ok'], true);
      expect(toolResult.result['eventId'], 'evt_001');
    });

    test('ToolCallResultEvent.ui parses from payload.ui', () {
      final json = {
        'type': 'TOOL_CALL_RESULT',
        'messageId': 'msg_123',
        'toolCallId': 'tc_123',
        'content':
            '{"ui":{"type":"calendar_card.v1","version":"v1","data":{"id":"evt_1","title":"会议","startAt":"2026-03-01T10:00:00Z"},"actions":[]}}',
      };

      final event = AgUiEvent.fromJson(json) as ToolCallResultEvent;
      expect(event.ui, isNotNull);
      expect(event.ui!.cardType, 'calendar_card.v1');
    });

    test(
      'ToolCallResultEvent.ui parses from payload.result when result is UiCard',
      () {
        final json = {
          'type': 'TOOL_CALL_RESULT',
          'messageId': 'msg_123',
          'toolCallId': 'tc_123',
          'content':
              '{"result":{"type":"calendar_operation.v1","version":"v1","data":{"operation":"delete","ok":true},"actions":[]}}',
        };

        final event = AgUiEvent.fromJson(json) as ToolCallResultEvent;
        expect(event.ui, isNotNull);
        expect(event.ui!.cardType, 'calendar_operation.v1');
      },
    );

    test('parses ToolCallErrorEvent', () {
      final json = {
        'type': 'TOOL_CALL_ERROR',
        'toolCallId': 'tc_123',
        'error': 'Execution failed',
        'code': 'EXEC_ERROR',
      };

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<ToolCallErrorEvent>());
      final toolError = event as ToolCallErrorEvent;
      expect(toolError.toolCallId, 'tc_123');
      expect(toolError.error, 'Execution failed');
      expect(toolError.code, 'EXEC_ERROR');
    });

    test('parses StateSnapshotEvent', () {
      final json = {
        'type': 'STATE_SNAPSHOT',
        'snapshot': {'scope': 'history_day', 'hasMore': false, 'messages': []},
      };

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<StateSnapshotEvent>());
      final stateSnapshot = event as StateSnapshotEvent;
      expect(stateSnapshot.snapshot['scope'], 'history_day');
    });

    test('returns UnknownAgUiEvent for unknown type', () {
      final json = {'type': 'UNKNOWN_TYPE', 'someField': 'someValue'};

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<UnknownAgUiEvent>());
      final unknown = event as UnknownAgUiEvent;
      expect(unknown.rawJson['someField'], 'someValue');
    });

    test('returns UnknownAgUiEvent for missing type', () {
      final json = {'someField': 'someValue'};

      final event = AgUiEvent.fromJson(json);

      expect(event, isA<UnknownAgUiEvent>());
    });
  });

  group('toJson', () {
    test('RunStartedEvent serializes with correct fields', () {
      final event = RunStartedEvent(threadId: 't1', runId: 'r1');
      final json = event.toJson();

      expect(json['threadId'], 't1');
      expect(json['runId'], 'r1');
    });

    test('TextMessageContentEvent serializes with correct fields', () {
      final event = TextMessageContentEvent(messageId: 'm1', delta: 'hello');
      final json = event.toJson();

      expect(json['messageId'], 'm1');
      expect(json['delta'], 'hello');
    });

    test('ToolCallStartEvent serializes with correct fields', () {
      final event = ToolCallStartEvent(
        toolCallId: 'tc1',
        toolCallName: 'test_tool',
      );
      final json = event.toJson();

      expect(json['toolCallId'], 'tc1');
      expect(json['toolCallName'], 'test_tool');
    });
  });
}