import { test } from 'node:test'
import assert from 'node:assert/strict'
import fs from 'node:fs'
import os from 'node:os'
import path from 'node:path'

import {
  classifyProgress,
  clearHandoff,
  extractQuestionsFromText,
  loadGoal,
  normaliseQuestions,
  readHandoff,
  resetProgress,
  readProgress,
  buildIterationPrompt,
} from '../src/goal.mjs'

function tmpProject() {
  const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'kilo-loop-'))
  return dir
}

test('loadGoal parses markdown checkboxes', () => {
  const project = tmpProject()
  const file = path.join(project, 'goal.md')
  fs.writeFileSync(file, '# My goal\n\nBody text.\n\n- [x] done one\n- [ ] next one\n')
  const goal = loadGoal({ project, goal: 'goal.md', goalText: '' })
  assert.equal(goal.title, 'My goal')
  assert.equal(goal.stages.length, 2)
  assert.equal(goal.stages[0].done, true)
  assert.equal(goal.stages[1].title, 'next one')
})

test('loadGoal parses json stages', () => {
  const project = tmpProject()
  const file = path.join(project, 'goal.json')
  fs.writeFileSync(file, JSON.stringify({ title: 'T', stages: [{ id: 'a', title: 'A' }] }))
  const goal = loadGoal({ project, goal: 'goal.json', goalText: '' })
  assert.equal(goal.stages[0].id, 'a')
})

test('loadGoal unwraps inline-code backticks around verify commands', () => {
  const project = tmpProject()
  const file = path.join(project, 'goal.md')
  fs.writeFileSync(
    file,
    '# G\n\n- [ ] One :: verify: `pnpm test` :: acceptance: ok\n- [ ] Two :: verify: pnpm build :: acceptance: ok\n',
  )
  const goal = loadGoal({ project, goal: 'goal.md', goalText: '' })
  assert.equal(goal.stages[0].verify, 'pnpm test')
  assert.equal(goal.stages[1].verify, 'pnpm build')
})

test('loadGoal unwraps inline-code backticks in json verify', () => {
  const project = tmpProject()
  const file = path.join(project, 'goal.json')
  fs.writeFileSync(file, JSON.stringify({ title: 'T', stages: [{ id: 'a', title: 'A', verify: '`pnpm test`' }] }))
  const goal = loadGoal({ project, goal: 'goal.json', goalText: '' })
  assert.equal(goal.stages[0].verify, 'pnpm test')
})

test('loadGoal falls back to a single stage for inline text', () => {
  const goal = loadGoal({ project: '/tmp', goal: '', goalText: 'Do the thing' })
  assert.equal(goal.stages.length, 1)
  assert.equal(goal.title, 'Do the thing')
})

test('classifyProgress prefers explicit percent and normalises questions', () => {
  const goal = { title: 'G', stages: [{ id: 's1', title: 'One' }, { id: 's2', title: 'Two' }] }
  const cls = classifyProgress(
    { topic: 'topic', percent: 42, stageId: 's2', stageStatus: 'in_progress', nextStage: 'Two', questions: ['Why?'] },
    goal,
    1,
  )
  assert.equal(cls.percent, 42)
  assert.equal(cls.topic, 'topic')
  assert.equal(cls.nextStage, 'Two')
  assert.equal(cls.needsInput, true)
  assert.equal(cls.questions[0].text, 'Why?')
})

test('classifyProgress derives percent from completed stages', () => {
  const goal = { title: 'G', stages: [{ id: 's1', title: 'One' }, { id: 's2', title: 'Two' }] }
  const cls = classifyProgress({ stageId: 's1', stageStatus: 'done' }, goal, 1)
  assert.equal(cls.percent, 50)
  assert.equal(cls.stageStatus, 'done')
})

test('classifyProgress clamps out-of-range percentages', () => {
  const goal = { title: 'G', stages: [{ id: 's1', title: 'One' }] }
  assert.equal(classifyProgress({ percent: 900 }, goal, 1).percent, 100)
  assert.equal(classifyProgress({ percent: -5 }, goal, 1).percent, 0)
})

test('normaliseQuestions handles strings and objects, filters blanks', () => {
  const qs = normaliseQuestions(['a?', { id: 'x', text: 'b?', options: [1, 2] }, { text: ' ' }])
  assert.equal(qs.length, 2)
  assert.deepEqual(qs[1].options, ['1', '2'])
})

test('extractQuestionsFromText pulls question lines only', () => {
  const qs = extractQuestionsFromText(['Line one\ndoes this work?\nhttp://x?y=1\nAnother question?'])
  assert.equal(qs.length, 2)
  assert.match(qs[0].text, /does this work\?/)
})

test('resetProgress + readProgress round-trip', () => {
  const project = tmpProject()
  resetProgress({ project }, 'run-1', 3)
  const p = readProgress({ project })
  assert.equal(p.runId, 'run-1')
  assert.equal(p.iteration, 3)
})

test('buildIterationPrompt embeds the progress path and answers', () => {
  const project = tmpProject()
  const goal = { title: 'G', description: 'd', stages: [{ id: 's1', title: 'One' }] }
  const prompt = buildIterationPrompt({
    config: { project, promptExtra: '' },
    goal,
    iteration: 2,
    total: 5,
    progress: { stageId: 's1', summary: 'prev', iteration: 1 },
    answers: [{ question: 'Q?', answer: 'A!' }],
    currentStageIndex: 0,
  })
  assert.match(prompt, /iteration 2\/5/i)
  assert.match(prompt, /progress\.json/)
  assert.match(prompt, /Q:/)
  assert.match(prompt, /A!/)
})

test('buildIterationPrompt embeds the custom instruction before the goal', () => {
  const project = tmpProject()
  const goal = { title: 'G', description: 'd', stages: [{ id: 's1', title: 'One' }] }
  const prompt = buildIterationPrompt({
    config: { project, promptExtra: 'Always run pnpm test before reporting done.' },
    goal,
    iteration: 1,
    total: 3,
    progress: null,
    answers: [],
    currentStageIndex: 0,
  })
  assert.match(prompt, /## Operator instructions for this run/)
  assert.match(prompt, /Always run pnpm test/)
  assert.ok(prompt.indexOf('## Operator instructions') < prompt.indexOf('## Goal'))

  const plain = buildIterationPrompt({
    config: { project, promptExtra: '   ' },
    goal,
    iteration: 1,
    total: 3,
    progress: null,
    answers: [],
    currentStageIndex: 0,
  })
  assert.doesNotMatch(plain, /## Operator instructions/)
})

test('readHandoff + clearHandoff round-trip', () => {
  const project = tmpProject()
  assert.equal(readHandoff({ project }), null)
  fs.mkdirSync(path.join(project, '.kilocode-loop'), { recursive: true })
  fs.writeFileSync(path.join(project, '.kilocode-loop', 'handoff.md'), '  packet  ')
  assert.equal(readHandoff({ project }), 'packet')
  clearHandoff({ project })
  assert.equal(readHandoff({ project }), null)
})

test('buildIterationPrompt in fresh mode embeds the handoff packet and file list', () => {
  const project = tmpProject()
  const goal = { title: 'G', description: 'd', stages: [{ id: 's1', title: 'One' }] }
  const prompt = buildIterationPrompt({
    config: { project, promptExtra: '' },
    goal,
    iteration: 2,
    total: 5,
    progress: { stageId: 's1', summary: 'prev', iteration: 1, nextStage: 'Two' },
    answers: [],
    currentStageIndex: 0,
    sharedContext: false,
    handoff: '### Decision\nUse q-select.',
    filesChanged: ['src/a.vue'],
  })
  assert.match(prompt, /fresh session/i)
  assert.match(prompt, /Context handoff/)
  assert.match(prompt, /handoff\.md/)
  assert.match(prompt, /Use q-select/)
  assert.match(prompt, /src\/a\.vue/)
})

test('buildIterationPrompt in shared mode omits the fresh-context handoff', () => {
  const project = tmpProject()
  const goal = { title: 'G', description: 'd', stages: [{ id: 's1', title: 'One' }] }
  const prompt = buildIterationPrompt({
    config: { project, promptExtra: '' },
    goal,
    iteration: 1,
    total: 2,
    progress: null,
    answers: [],
    currentStageIndex: 0,
    sharedContext: true,
  })
  assert.doesNotMatch(prompt, /fresh session/i)
  assert.doesNotMatch(prompt, /Handoff to the next iteration/)
})