/**
 * Regression test: ContextAssembler L6-L9 stub layers
 *
 * Verifies that L6-L9 layers are implemented as actual stub layer pushes,
 * not just TODO comments.
 */

import { describe, test, expect } from 'bun:test'
import { readFileSync } from 'fs'
import { join } from 'path'

const SOURCE_PATH = join(
  import.meta.dir,
  '..',
  '..',
  'src',
  'context',
  'ContextAssembler.ts'
)

const source = readFileSync(SOURCE_PATH, 'utf-8')

describe('ContextAssembler L6-L9 stub layers', () => {
  test('source has L6 evidence layer (not just TODO comment)', () => {
    // TODO(P3): L6 should be gone
    expect(source).not.toContain("TODO(P3): L6")
    // 'evidence' level should exist as a pushed layer
    expect(source).toContain("level: 'evidence'")
  })

  test('source has L7 conversation layer', () => {
    expect(source).not.toContain("TODO(P3): L7")
    expect(source).toContain("level: 'conversation'")
  })

  test('source has L8 tool_output layer', () => {
    expect(source).not.toContain("TODO(P3): L8")
    expect(source).toContain("level: 'tool_output'")
  })

  test('source has L9 user_override layer', () => {
    expect(source).not.toContain("TODO(P3): L9")
    expect(source).toContain("level: 'user_override'")
  })

  test('stub layers have priority values 6-9', () => {
    expect(source).toContain('priority: 6')
    expect(source).toContain('priority: 7')
    expect(source).toContain('priority: 8')
    expect(source).toContain('priority: 9')
  })

  test('stub layers have token_estimate: 0', () => {
    // Each stub should set token_estimate to 0
    const stubLayerPattern = /token_estimate:\s*0/g
    const matches = source.match(stubLayerPattern)
    // At least 4 occurrences (one per stub layer)
    expect(matches).not.toBeNull()
    expect(matches!.length).toBeGreaterThanOrEqual(4)
  })
})