// Direct API agent that uses Anthropic SDK without Claude Code dependency
import Anthropic from '@anthropic-ai/sdk';
import { logger } from "../utils/logger.js";
import { withRetry } from "../utils/retry.js";
function getCurrentProvider() {
    // Determine provider from environment
    if (process.env.PROVIDER === 'gemini' || process.env.USE_GEMINI === 'true') {
        return 'gemini';
    }
    if (process.env.PROVIDER === 'requesty' || process.env.USE_REQUESTY === 'true') {
        return 'requesty';
    }
    if (process.env.PROVIDER === 'openrouter' || process.env.USE_OPENROUTER === 'true') {
        return 'openrouter';
    }
    if (process.env.PROVIDER === 'onnx' || process.env.USE_ONNX === 'true') {
        return 'onnx';
    }
    return 'anthropic'; // Default
}
function getModelForProvider(provider) {
    // Use DEFAULT_MODEL or COMPLETION_MODEL from environment (both supported for backward compatibility)
    const envModel = process.env.DEFAULT_MODEL || process.env.COMPLETION_MODEL;
    switch (provider) {
        case 'gemini':
            return {
                model: envModel || 'gemini-2.0-flash-exp',
                apiKey: process.env.GOOGLE_GEMINI_API_KEY || '',
                baseURL: process.env.GEMINI_PROXY_URL || 'http://localhost:3000'
            };
        case 'requesty':
            return {
                model: envModel || 'deepseek/deepseek-chat',
                apiKey: process.env.REQUESTY_API_KEY || '',
                baseURL: process.env.REQUESTY_PROXY_URL || 'http://localhost:3000'
            };
        case 'openrouter':
            return {
                model: envModel || 'deepseek/deepseek-chat',
                apiKey: process.env.OPENROUTER_API_KEY || '',
                baseURL: process.env.OPENROUTER_PROXY_URL || 'http://localhost:3000'
            };
        case 'onnx':
            return {
                model: 'onnx-local',
                apiKey: 'local',
                baseURL: process.env.ONNX_PROXY_URL || 'http://localhost:3001'
            };
        case 'anthropic':
        default:
            const apiKey = process.env.ANTHROPIC_API_KEY;
            if (!apiKey) {
                throw new Error('ANTHROPIC_API_KEY is required for Anthropic provider');
            }
            return {
                model: envModel || 'claude-sonnet-4-5-20250929',
                apiKey,
                // Direct Anthropic API - no baseURL needed
            };
    }
}
export async function claudeAgentDirect(agent, input, onStream, modelOverride) {
    const startTime = Date.now();
    const provider = getCurrentProvider();
    logger.info('Starting Direct Anthropic SDK (no Claude Code dependency)', {
        agent: agent.name,
        provider,
        input: input.substring(0, 100),
        model: modelOverride || 'default'
    });
    return withRetry(async () => {
        const modelConfig = getModelForProvider(provider);
        const finalModel = modelOverride || modelConfig.model;
        // Create Anthropic client with provider-specific configuration
        const anthropic = new Anthropic({
            apiKey: modelConfig.apiKey,
            baseURL: modelConfig.baseURL, // undefined for direct Anthropic, proxy URL for others
            timeout: 120000,
            maxRetries: 3
        });
        logger.info('Direct API configuration', {
            provider,
            model: finalModel,
            hasApiKey: !!modelConfig.apiKey,
            hasBaseURL: !!modelConfig.baseURL
        });
        try {
            // Build messages array
            const messages = [
                { role: 'user', content: input }
            ];
            // Call Anthropic API directly (no Claude Code subprocess)
            const stream = await anthropic.messages.create({
                model: finalModel,
                max_tokens: 4096,
                system: agent.systemPrompt,
                messages,
                stream: true
            });
            let output = '';
            let toolCallCount = 0;
            // Process streaming response
            for await (const event of stream) {
                if (event.type === 'content_block_start') {
                    if (event.content_block.type === 'text') {
                        // Text content start
                        continue;
                    }
                    else if (event.content_block.type === 'tool_use') {
                        // Tool use detected
                        toolCallCount++;
                        const toolName = event.content_block.name || 'unknown';
                        const timestamp = new Date().toISOString().split('T')[1].split('.')[0];
                        const progressMsg = `\n[${timestamp}] 🔍 Tool call #${toolCallCount}: ${toolName}\n`;
                        process.stderr.write(progressMsg);
                        if (onStream) {
                            onStream(progressMsg);
                        }
                    }
                }
                else if (event.type === 'content_block_delta') {
                    if (event.delta.type === 'text_delta') {
                        const chunk = event.delta.text;
                        output += chunk;
                        if (onStream && chunk) {
                            onStream(chunk);
                        }
                    }
                }
                else if (event.type === 'content_block_stop') {
                    if (toolCallCount > 0) {
                        const timestamp = new Date().toISOString().split('T')[1].split('.')[0];
                        const resultMsg = `[${timestamp}] ✅ Tool completed\n`;
                        process.stderr.write(resultMsg);
                        if (onStream) {
                            onStream(resultMsg);
                        }
                    }
                }
                else if (event.type === 'message_stop') {
                    // Stream complete
                    break;
                }
                // Flush output for immediate visibility
                if (process.stderr.uncork) {
                    process.stderr.uncork();
                }
                if (process.stdout.uncork) {
                    process.stdout.uncork();
                }
            }
            const duration = Date.now() - startTime;
            logger.info('Direct SDK completed', {
                agent: agent.name,
                provider,
                duration,
                outputLength: output.length
            });
            return { output, agent: agent.name };
        }
        catch (error) {
            logger.error('Direct SDK execution failed', {
                provider,
                model: finalModel,
                error: error.message
            });
            throw error;
        }
    });
}
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