/**
 * DebuggerRole - Diagnostic and repair worker
 * Analyzes errors, reproduces issues, applies fixes.
 *
 * @module packages/workers/src/roles/DebuggerRole
 */

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

export interface DebuggerResult {
  status: 'fixed' | 'cannot_reproduce' | 'blocked' | 'escalated'
  root_cause: string
  fix_applied?: { file: string; change: string }
  evidence_refs: string[]
  diagnostic_chain: string[]
}

export class DebuggerRole {
  private runtime: WorkerRuntime

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

  async run(debug_spec: { task_id: string; error_report: string; affected_files: string[] }): Promise<DebuggerResult> {
    const result: DebuggerResult = {
      status: 'cannot_reproduce',
      root_cause: '',
      evidence_refs: [],
      diagnostic_chain: []
    }

    try {
      this.runtime.emit('debug.started', { task_id: debug_spec.task_id })

      // Step 1: Gather evidence
      result.diagnostic_chain.push('1. Gathering evidence')
      for (const file of debug_spec.affected_files) {
        await this.runtime.call_tool('fs.read', { path: file })
      }

      // Step 2: Analyze error signatures
      result.diagnostic_chain.push('2. Analyzing error signatures')

      // Step 3: Reproduce
      result.diagnostic_chain.push('3. Attempting reproduction')

      // Step 4: Apply fix if root cause found
      // result.fix_applied = { file: '...', change: '...' }

      result.root_cause = 'Diagnostic stub — implementation pending'
      result.status = 'cannot_reproduce'

      this.runtime.checkpoint('debug_completed', { task_id: debug_spec.task_id })
      return result

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