import { BaseSkill, type SkillInput, type SkillResult, type SkillMetadata } from './base-skill.js';
import type { BaseChatModel } from '@langchain/core/language_models/chat_models';
import type { FastifyBaseLogger } from 'fastify';
import { HumanMessage, SystemMessage } from '@langchain/core/messages';

/**
 * Market analysis skill implementation
 *
 * See market-analysis.skill.md for full documentation
 */
export class MarketAnalysisSkill extends BaseSkill {
  constructor(logger: FastifyBaseLogger, model?: BaseChatModel) {
    super(logger, model);
  }

  getMetadata(): SkillMetadata {
    return {
      name: 'market-analysis',
      description: 'Analyze market conditions for a given ticker and timeframe',
      version: '1.0.0',
      author: 'Dexorder AI Platform',
      tags: ['market-data', 'analysis', 'trading'],
    };
  }

  getParametersSchema(): Record<string, unknown> {
    return {
      type: 'object',
      required: ['ticker', 'period'],
      properties: {
        ticker: {
          type: 'string',
          description: 'Market identifier (e.g., "BINANCE:BTC/USDT")',
        },
        period: {
          type: 'string',
          enum: ['1h', '4h', '1d', '1w'],
          description: 'Analysis period',
        },
        startTime: {
          type: 'number',
          description: 'Start timestamp in microseconds',
        },
        endTime: {
          type: 'number',
          description: 'End timestamp in microseconds',
        },
        indicators: {
          type: 'array',
          items: { type: 'string' },
          description: 'Additional indicators to include',
        },
      },
    };
  }

  validateInput(parameters: Record<string, unknown>): boolean {
    if (!parameters.ticker || typeof parameters.ticker !== 'string') {
      return false;
    }
    if (!parameters.period || typeof parameters.period !== 'string') {
      return false;
    }
    return true;
  }

  async execute(input: SkillInput): Promise<SkillResult> {
    this.logStart(input);

    if (!this.validateInput(input.parameters)) {
      return this.error('Invalid parameters: ticker and period are required');
    }

    try {
      const ticker = input.parameters.ticker as string;
      const period = input.parameters.period as string;
      const indicators = (input.parameters.indicators as string[]) || [];

      // 1. Fetch OHLC data from Iceberg
      // TODO: Implement Iceberg query
      // const ohlcData = await this.fetchOHLCData(ticker, period, startTime, endTime);
      const ohlcData = this.getMockOHLCData(); // Placeholder

      // 2. Calculate technical indicators
      const analysis = this.calculateAnalysis(ohlcData, indicators);

      // 3. Generate natural language analysis using LLM
      let narrativeAnalysis = '';
      if (this.model) {
        narrativeAnalysis = await this.generateNarrativeAnalysis(
          ticker,
          period,
          analysis
        );
      }

      const result = this.success({
        ticker,
        period,
        timeRange: {
          start: ohlcData.startTime,
          end: ohlcData.endTime,
        },
        trend: analysis.trend,
        priceChange: analysis.priceChange,
        volumeProfile: analysis.volumeProfile,
        supportLevels: analysis.supportLevels,
        resistanceLevels: analysis.resistanceLevels,
        indicators: analysis.indicators,
        analysis: narrativeAnalysis,
      });

      this.logEnd(result);
      return result;
    } catch (error) {
      const result = this.error(error as Error);
      this.logEnd(result);
      return result;
    }
  }

  /**
   * Calculate technical analysis from OHLC data
   */
  private calculateAnalysis(
    ohlcData: any,
    _requestedIndicators: string[]
  ): any {
    // TODO: Implement proper technical analysis
    // This is a simplified placeholder

    const priceChange = ((ohlcData.close - ohlcData.open) / ohlcData.open) * 100;
    const trend = priceChange > 1 ? 'bullish' : priceChange < -1 ? 'bearish' : 'neutral';

    return {
      trend,
      priceChange,
      volumeProfile: {
        average: ohlcData.avgVolume,
        recent: ohlcData.currentVolume,
        trend: ohlcData.currentVolume > ohlcData.avgVolume ? 'increasing' : 'decreasing',
      },
      supportLevels: [ohlcData.low * 0.98, ohlcData.low * 0.95],
      resistanceLevels: [ohlcData.high * 1.02, ohlcData.high * 1.05],
      indicators: {},
    };
  }

  /**
   * Generate natural language analysis using LLM
   */
  private async generateNarrativeAnalysis(
    ticker: string,
    period: string,
    analysis: any
  ): Promise<string> {
    if (!this.model) {
      return 'LLM not available for narrative analysis';
    }

    const systemPrompt = `You are a professional market analyst.
Provide concise, actionable market analysis based on technical data.
Focus on key insights and avoid jargon.`;

    const userPrompt = `Analyze the following market data for ${ticker} (${period}):

Trend: ${analysis.trend}
Price Change: ${analysis.priceChange.toFixed(2)}%
Volume: ${analysis.volumeProfile.trend}
Support Levels: ${analysis.supportLevels.join(', ')}
Resistance Levels: ${analysis.resistanceLevels.join(', ')}

Provide a 2-3 sentence analysis suitable for a trading decision.`;

    const response = await this.model.invoke([
      new SystemMessage(systemPrompt),
      new HumanMessage(userPrompt),
    ]);

    return response.content as string;
  }

  /**
   * Mock OHLC data (placeholder until Iceberg integration)
   */
  private getMockOHLCData(): any {
    return {
      startTime: Date.now() - 7 * 24 * 60 * 60 * 1000,
      endTime: Date.now(),
      open: 50000,
      high: 52000,
      low: 49000,
      close: 51500,
      avgVolume: 1000000,
      currentVolume: 1200000,
    };
  }
}