/**
 * ExperienceMinerRole - Pattern extraction worker
 * Analyzes completed tasks for reusable patterns.
 *
 * @module packages/workers/src/roles/ExperienceMinerRole
 */

import { WorkerRuntime } from '../WorkerRuntime.js'

export interface ExperienceMinerResult {
  status: 'completed' | 'no_patterns' | 'blocked'
  entries: Array<{
    category: string
    pattern: string
    source_task_id: string
    description: string
  }>
  summary: string
}

export class ExperienceMinerRole {
  private runtime: WorkerRuntime

  constructor(runtime: WorkerRuntime) {
    this.runtime = runtime
  }

  async run(mine_spec: { task_ids: string[]; focus_categories?: string[] }): Promise<ExperienceMinerResult> {
    const result: ExperienceMinerResult = {
      status: 'no_patterns',
      entries: [],
      summary: ''
    }

    try {
      this.runtime.emit('mining.started', { task_ids: mine_spec.task_ids })

      // Read completed task results
      for (const task_id of mine_spec.task_ids) {
        // Would read task artifacts and evidence
        // Extract patterns from successful tasks
      }

      // Stub entry
      result.entries.push({
        category: 'stub',
        pattern: 'Pattern extraction stub',
        source_task_id: mine_spec.task_ids[0] || '',
        description: 'Full mining implementation pending'
      })

      result.status = 'completed'
      result.summary = `Mined ${result.entries.length} patterns from ${mine_spec.task_ids.length} tasks`

      this.runtime.checkpoint('mining_completed', { patterns_found: result.entries.length })
      return result

    } catch (error) {
      result.status = 'blocked'
      result.summary = error instanceof Error ? error.message : String(error)
      return result
    }
  }
}
