/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import type { SessionEventPayload } from '@github/copilot-sdk';
import assert from 'assert';
import { URI } from '../../../../base/common/uri.js';
import { ensureNoDisposablesAreLeakedInTestSuite } from '../../../../base/test/common/utils.js';
import { ITelemetryService, TelemetryLevel } from '../../../telemetry/common/telemetry.js';
import { getTelemetryChatSessionId } from '../../common/agentTelemetryCorrelation.js';
import { AgentSession } from '../../common/agent.js';
import { AgentHostClientType } from '../../common/agentHostClientInfo.js';
import { AgentHostClientConnectionKind, AgentHostLaunchKind, AgentHostTransportKind } from '../../common/agentHostTelemetry.js';
import { readAgentErrorTelemetryMeta } from '../../common/meta/agentErrorMeta.js';
import { buildChatUri, buildSubagentSessionUri } from '../../common/state/sessionState.js';
import { classifyCopilotClientFailure, createCopilotFailureCorrelation, normalizeCopilotApiEndpoint, reportCopilotModelCallFailure } from '../../node/copilot/copilotFailureTelemetry.js';

class CapturingTelemetryService implements ITelemetryService {
	declare readonly _serviceBrand: undefined;
	readonly telemetryLevel = TelemetryLevel.USAGE;
	readonly sessionId = 'test-session';
	readonly machineId = 'test-machine';
	readonly sqmId = 'test-sqm';
	readonly devDeviceId = 'test-dev-device';
	readonly firstSessionDate = 'test-first-session-date';
	readonly sendErrorTelemetry = true;
	readonly events: { eventName: string; data: Record<string, unknown> | undefined }[] = [];

	publicLog(): void { }
	publicLog2(): void { }
	publicLogError(): void { }
	publicLogError2(eventName: string, data?: Record<string, unknown>): void {
		this.events.push({ eventName, data });
	}
	setExperimentProperty(): void { }
	setCommonProperty(): void { }
}

suite('CopilotFailureTelemetry', () => {
	ensureNoDisposablesAreLeakedInTestSuite();

	test('classifies only known client lifecycle failures', () => {
		assert.deepStrictEqual([
			classifyCopilotClientFailure(new Error('Connection is closed.')),
			classifyCopilotClientFailure(new Error('Connection is disposed.')),
			classifyCopilotClientFailure(new Error('Client not connected')),
			classifyCopilotClientFailure(new Error('The in-process runtime connection is closed.')),
			classifyCopilotClientFailure(new Error('Failed to start CLI server: spawn failed')),
			classifyCopilotClientFailure(new Error('CLI server exited with code 1')),
			classifyCopilotClientFailure(new Error('CLI server exited unexpectedly with code 1')),
			classifyCopilotClientFailure(new Error('Timeout waiting for CLI server to start')),
			classifyCopilotClientFailure(new Error('429 too many requests')),
		], [
			'connectionClosed',
			'connectionDisposed',
			'clientNotConnected',
			'runtimeConnectionClosed',
			'startupFailed',
			'startupFailed',
			'startupFailed',
			'startupFailed',
			undefined,
		]);
	});

	test('builds the Agent Host and SDK correlation tuple', () => {
		const session = AgentSession.uri('copilotcli', 'agent-session-id');
		const chat = URI.parse(buildChatUri(session, 'peer-chat-id'));

		assert.deepStrictEqual(createCopilotFailureCorrelation(session, chat, 'turn-id', 'sdk-session-id', {
			clientType: AgentHostClientType.EditorWindow,
			connectionKind: AgentHostClientConnectionKind.RemoteExtensionHost,
			transportKind: AgentHostTransportKind.MessagePort,
			hostLaunchKind: AgentHostLaunchKind.VSCodeMainProcess,
			machineId: 'client-machine-id',
			devDeviceId: 'client-dev-device-id',
		}), {
			initiatorClientType: 'editor_window',
			initiatorConnectionKind: 'remote_extension_host',
			initiatorTransportKind: 'message_port',
			hostLaunchKind: 'vscode_main_process',
			initiatorMachineId: 'client-machine-id',
			initiatorDevDeviceId: 'client-dev-device-id',
			agentSessionId: 'agent-session-id',
			chatSessionId: getTelemetryChatSessionId(chat),
			turnId: 'turn-id',
			sdkSessionId: 'sdk-session-id',
		});
	});

	test('hashes subagent chat IDs without path-like telemetry values', () => {
		const session = AgentSession.uri('copilotcli', 'agent-session-id');
		const subagent = URI.parse(buildSubagentSessionUri(session, 'tool-call-id'));
		const value = getTelemetryChatSessionId(subagent);

		assert.strictEqual(value, String(Number(value)));
		assert.strictEqual(value.includes('/'), false);
	});

	test('normalizes only allowlisted Copilot API endpoints', () => {
		assert.deepStrictEqual([
			normalizeCopilotApiEndpoint('/chat/completions'),
			normalizeCopilotApiEndpoint('/responses'),
			normalizeCopilotApiEndpoint('/v1/messages'),
			normalizeCopilotApiEndpoint('ws:/responses'),
			normalizeCopilotApiEndpoint('https://api.githubcopilot.com/responses'),
			normalizeCopilotApiEndpoint('https://contoso.example/private/deployment'),
			normalizeCopilotApiEndpoint(undefined),
		], [
			'chatCompletions',
			'responses',
			'anthropicMessages',
			'responsesWebSocket',
			'responses',
			'other',
			undefined,
		]);
	});

	test('reports bounded model call endpoint categories instead of raw endpoints', () => {
		const telemetryService = new CapturingTelemetryService();
		const session = AgentSession.uri('copilotcli', 'agent-session-id');
		const chat = URI.parse(buildChatUri(session, 'peer-chat-id'));
		const correlation = createCopilotFailureCorrelation(session, chat, 'turn-id', 'sdk-session-id');
		const event: SessionEventPayload<'model.call_failure'> = {
			type: 'model.call_failure',
			id: 'event-1',
			parentId: 'parent-1',
			agentId: 'agent-1',
			timestamp: '2026-01-01T00:00:00.000Z',
			ephemeral: true,
			data: {
				source: 'top_level',
				failureKind: 'api',
				transport: 'http',
				apiEndpoint: '/responses',
				statusCode: 500,
				durationMs: 42,
				model: 'gpt-5.6-sol',
				reasoningEffort: 'high',
				isAuto: false,
				isByok: false,
				rte: true,
				badRequestKind: undefined,
				apiCallId: 'api-call-id',
				providerCallId: 'provider-call-id',
				serviceRequestId: 'service-request-id',
				requestFingerprint: undefined,
			},
		};

		reportCopilotModelCallFailure(telemetryService, event, correlation);

		assert.deepStrictEqual(telemetryService.events, [{
			eventName: 'agentHost.copilotModelCallFailure',
			data: {
				agentSessionId: 'agent-session-id',
				chatSessionId: getTelemetryChatSessionId(chat),
				turnId: 'turn-id',
				sdkSessionId: 'sdk-session-id',
				sdkEventId: 'event-1',
				sdkParentEventId: 'parent-1',
				sdkAgentId: 'agent-1',
				failureKind: 'api',
				source: 'top_level',
				transport: 'http',
				apiEndpoint: 'responses',
				statusCode: 500,
				durationMs: 42,
				model: 'gpt-5.6-sol',
				reasoningEffort: 'high',
				isAuto: false,
				isByok: false,
				rte: true,
				badRequestKind: undefined,
				apiCallId: 'api-call-id',
				providerCallId: 'provider-call-id',
				serviceRequestId: 'service-request-id',
				messageCount: undefined,
				toolCallCount: undefined,
				toolResultMessageCount: undefined,
				namelessToolCallCount: undefined,
				imagePartCount: undefined,
				imagePartsMissingMediaType: undefined,
			},
		}]);
	});

	test('drops empty provider request identifiers', () => {
		assert.deepStrictEqual(readAgentErrorTelemetryMeta({
			errorType: 'test',
			message: 'failed',
			_meta: {
				chatError: {
					fetchError: {
						requestId: '',
						serverRequestId: '',
					},
				},
			},
		}), {
			providerCallId: undefined,
			serviceRequestId: undefined,
		});
	});
});