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/**
 * Chat Participant para G-Bot
 * Permite invocar comandos desde el chat de GitHub Copilot usando @gbot
 */
 
const vscode = require("vscode");
 
class GBotChatParticipant {
  constructor(prReviewService, logger) {
    this.prReviewService = prReviewService;
    this.logger = logger;
  }
 
  /**
   * Registra el chat participant
   */
  register(context) {
    const participant = vscode.chat.createChatParticipant(
      "gbot.chat",
      this._handleChatRequest.bind(this),
    );
 
    participant.iconPath = vscode.Uri.joinPath(
      context.extensionUri,
      "resources",
      "icon.png",
    );
 
    context.subscriptions.push(participant);
    this.logger.info("✅ Chat Participant registrado: @gbot");
  }
 
  /**
   * Maneja las solicitudes del chat
   */
  async _handleChatRequest(request, context, stream, token) {
    const command = request.command;
    const prompt = request.prompt.trim();
 
    this.logger.info(
      `💬 Chat command: ${command || "default"}, prompt: "${prompt}"`,
    );
 
    try {
      // Si no hay comando específico, mostrar ayuda
      if (!command) {
        return await this._showHelp(stream);
      }
 
      // Ejecutar comando específico
      switch (command) {
        case "review":
          return await this._handleReview(stream, token);
 
        case "compare":
          return await this._handleCompare(stream, prompt, token);
 
        case "risk":
          return await this._handleRisk(stream, token);
 
        case "standards":
          return await this._handleStandards(stream, token);
 
        case "stats":
          return await this._handleStats(stream, token);
 
        default:
          stream.markdown(`❓ Comando desconocido: \`${command}\`\n\n`);
          return await this._showHelp(stream);
      }
    } catch (error) {
      this.logger.error(`Error en chat participant: ${error.message}`);
 
      // Proporcionar mensajes más útiles según el tipo de error
      if (
        error.message?.includes("403") ||
        error.message?.includes("autorización")
      ) {
        stream.markdown(`❌ **Error de autorización de GitHub Copilot**\n\n`);
        stream.markdown(
          `GitHub Copilot está temporalmente no disponible. Esto suele ocurrir por:\n\n`,
        );
        stream.markdown(`• **Cuota de tokens agotada**: Espera 5-10 minutos\n`);
        stream.markdown(
          `• **Límite de tasa alcanzado**: Reduce la frecuencia de solicitudes\n`,
        );
        stream.markdown(`• **Sesión expirada**: Cierra y reabre VS Code\n\n`);
        stream.markdown(
          `💡 **Sugerencia**: Intenta nuevamente en unos minutos o usa el panel de Code Review en lugar del chat.\n\n`,
        );
      } else if (
        error.message?.includes("modelo") ||
        error.message?.includes("model")
      ) {
        stream.markdown(`❌ **Error de modelo de IA**\n\n`);
        stream.markdown(`${error.message}\n\n`);
        stream.markdown(
          `💡 Verifica tu suscripción de GitHub Copilot: https://github.com/settings/copilot\n\n`,
        );
      } else {
        stream.markdown(`❌ **Error**: ${error.message}\n\n`);
      }
 
      stream.markdown(`📋 Revisa el Output Channel "G-Bot" para más detalles.`);
    }
  }
 
  /**
   * Muestra ayuda de comandos disponibles
   */
  async _showHelp(stream) {
    stream.markdown("# 🔧 G-Bot - Comandos Disponibles\n\n");
 
    stream.markdown("## Comandos Slash\n\n");
    stream.markdown("- `/review` - Revisar cambios uncommitted\n");
    stream.markdown(
      "- `/compare` - Comparar branches (especifica: base target)\n",
    );
    stream.markdown("- `/risk` - Evaluar nivel de riesgo\n");
    stream.markdown("- `/standards` - Revisar contra estándares del equipo\n");
    stream.markdown("- `/stats` - Mostrar estadísticas de cambios\n\n");
 
    stream.markdown("## Ejemplos de Uso\n\n");
    stream.markdown("```\n");
    stream.markdown("@gbot /review\n");
    stream.markdown("@gbot /compare main feature/nueva-funcion\n");
    stream.markdown("@gbot /risk\n");
    stream.markdown("@gbot /standards\n");
    stream.markdown("```\n\n");
 
    stream.markdown(
      "💡 **Tip**: También puedes usar el panel Code Review en la vista Source Control.\n",
    );
  }
 
  /**
   * Maneja comando /review
   */
  async _handleReview(stream, token) {
    const workspaceRoot = vscode.workspace.workspaceFolders?.[0]?.uri.fsPath;
    if (!workspaceRoot) {
      stream.markdown("❌ No hay workspace abierto\n");
      return;
    }
 
    stream.progress("🔍 Analizando cambios uncommitted con GitHub Copilot...");
 
    const result = await this.prReviewService.reviewLocalChanges(
      workspaceRoot,
      false,
    );
 
    if (result.issues.length === 0) {
      stream.markdown(`✅ **${result.message}**\n\n`);
      stream.markdown(result.summary + "\n\n");
      return;
    }
 
    // Mostrar resumen
    stream.markdown(`## 📊 Resultados del Análisis\n\n`);
    stream.markdown(`**Total de issues**: ${result.issues.length}\n\n`);
 
    const criticalCount = result.issues.filter(
      (i) => i.severity === "critical" || i.severity === "high",
    ).length;
    if (criticalCount > 0) {
      stream.markdown(`⚠️ **${criticalCount} issue(s) crítico(s)**\n\n`);
    }
 
    stream.markdown(`### 📝 Resumen\n\n${result.summary}\n\n`);
 
    // Mostrar issues agrupados por severidad
    stream.markdown(`### 🔍 Issues Detectados\n\n`);
 
    const severityOrder = ["critical", "high", "medium", "low"];
    for (const severity of severityOrder) {
      const issuesOfSeverity = result.issues.filter(
        (i) => i.severity === severity,
      );
      if (issuesOfSeverity.length === 0) continue;
 
      const emoji = this._getSeverityEmoji(severity);
      stream.markdown(
        `#### ${emoji} ${severity.toUpperCase()} (${
          issuesOfSeverity.length
        })\n\n`,
      );
 
      issuesOfSeverity.forEach((issue, idx) => {
        stream.markdown(
          `**${idx + 1}. ${issue.category}** - \`${issue.location}\`\n`,
        );
        stream.markdown(`   ${issue.description}\n`);
        if (issue.recommendation) {
          stream.markdown(`   💡 *${issue.recommendation}*\n`);
        }
        stream.markdown("\n");
      });
    }
 
    stream.button({
      command: "gbot.reviewUnstagedChanges",
      title: "🔄 Ver en Panel de Code Review",
    });
  }
 
  /**
   * Maneja comando /compare
   */
  async _handleCompare(stream, prompt, token) {
    const workspaceRoot = vscode.workspace.workspaceFolders?.[0]?.uri.fsPath;
    if (!workspaceRoot) {
      stream.markdown("❌ No hay workspace abierto\n");
      return;
    }
 
    // Parsear branches del prompt
    const parts = prompt.split(/\s+/).filter((p) => p);
 
    if (parts.length < 2) {
      stream.markdown("❌ Especifica los branches a comparar:\n\n");
      stream.markdown(
        "```\n@gbot /compare main feature/nueva-funcion\n```\n\n",
      );
 
      // Mostrar branches disponibles
      const branches = this.prReviewService.getBranches(workspaceRoot);
      if (branches.length > 0) {
        stream.markdown("**Branches disponibles:**\n");
        branches.forEach((b) => stream.markdown(`- ${b}\n`));
      }
      return;
    }
 
    const baseRef = parts[0];
    const targetRef = parts[1] === "HEAD" ? "HEAD" : parts[1];
 
    stream.progress(`🔍 Comparando ${targetRef} vs ${baseRef}...`);
 
    const result = await this.prReviewService.reviewBranchComparison(
      workspaceRoot,
      baseRef,
      targetRef,
    );
 
    if (result.issues.length === 0) {
      stream.markdown(`✅ **${result.message}**\n\n`);
      stream.markdown(result.summary + "\n\n");
      return;
    }
 
    stream.markdown(`## 📊 Comparación: ${targetRef} ↔ ${baseRef}\n\n`);
    stream.markdown(`**Total de issues**: ${result.issues.length}\n\n`);
    stream.markdown(`### 📝 Resumen\n\n${result.summary}\n\n`);
 
    stream.markdown(`### 🔍 Issues Detectados\n\n`);
    result.issues.slice(0, 10).forEach((issue, idx) => {
      const emoji = this._getSeverityEmoji(issue.severity);
      stream.markdown(
        `${idx + 1}. ${emoji} **[${issue.severity.toUpperCase()}]** ${
          issue.category
        }\n`,
      );
      stream.markdown(`   📍 \`${issue.location}\`\n`);
      stream.markdown(`   ${issue.description}\n\n`);
    });
 
    if (result.issues.length > 10) {
      stream.markdown(`*... y ${result.issues.length - 10} issue(s) más*\n\n`);
    }
 
    stream.button({
      command: "gbot.compareBranches",
      title: "🔄 Ver en Panel de Code Review",
    });
  }
 
  /**
   * Maneja comando /risk
   */
  async _handleRisk(stream, token) {
    const workspaceRoot = vscode.workspace.workspaceFolders?.[0]?.uri.fsPath;
    if (!workspaceRoot) {
      stream.markdown("❌ No hay workspace abierto\n");
      return;
    }
 
    stream.progress("⚠️ Evaluando nivel de riesgo...");
 
    const result = await this.prReviewService.analyzeRisk(workspaceRoot, false);
 
    const riskEmojis = {
      none: "✅",
      low: "🟢",
      medium: "🟡",
      high: "🟠",
      critical: "🔴",
      unknown: "❓",
    };
 
    const emoji = riskEmojis[result.riskLevel] || "❓";
 
    stream.markdown(
      `## ${emoji} Nivel de Riesgo: ${result.riskLevel.toUpperCase()}\n\n`,
    );
 
    if (result.reasons && result.reasons.length > 0) {
      stream.markdown("### 📋 Razones\n\n");
      result.reasons.forEach((r) => stream.markdown(`- ${r}\n`));
      stream.markdown("\n");
    }
 
    if (result.recommendations && result.recommendations.length > 0) {
      stream.markdown("### 💡 Recomendaciones\n\n");
      result.recommendations.forEach((r) => stream.markdown(`- ${r}\n`));
      stream.markdown("\n");
    }
 
    stream.button({
      command: "gbot.analyzeRisk",
      title: "🔄 Analizar Nuevamente",
    });
  }
 
  /**
   * Maneja comando /standards
   */
  async _handleStandards(stream, token) {
    stream.progress("✅ Revisando contra estándares del equipo...");
 
    const result = await vscode.commands.executeCommand(
      "gbot.reviewStagedChanges",
    );
 
    stream.markdown(
      "✅ Revisión completada. Verifica el panel Code Review para ver los resultados.\n\n",
    );
 
    stream.button({
      command: "gbot.reviewStagedChanges",
      title: "🔄 Ver en Panel de Code Review",
    });
  }
 
  /**
   * Maneja comando /stats
   */
  async _handleStats(stream, token) {
    stream.progress("📊 Recopilando estadísticas...");
 
    await vscode.commands.executeCommand("gbot.showChangeStats");
 
    stream.markdown(
      '📊 Estadísticas generadas. Revisa el Output Channel "G-Bot".\n\n',
    );
  }
 
  /**
   * Obtiene emoji según severidad
   */
  _getSeverityEmoji(severity) {
    const emojis = {
      critical: "🚨",
      high: "🔴",
      medium: "⚠️",
      low: "ℹ️",
      info: "💡",
    };
    return emojis[severity?.toLowerCase()] || "ℹ️";
  }
}
 
module.exports = GBotChatParticipant;