import { describe, it, expect } from 'bun:test'
import {
  convertMarkdownTablesToBullets,
  formatImHelp,
  formatImStatus,
  splitMessage,
  formatToolUse,
  formatPermissionRequest,
  truncateInput,
  escapeMarkdownV2,
} from '../format.js'

describe('splitMessage', () => {
  it('returns single chunk for short text', () => {
    expect(splitMessage('hello', 100)).toEqual(['hello'])
  })

  it('splits at paragraph boundary', () => {
    const text = 'First paragraph.\n\nSecond paragraph.'
    const chunks = splitMessage(text, 20)
    expect(chunks.length).toBeGreaterThan(1)
    expect(chunks.join(' ').replace(/\s+/g, ' ')).toContain('First paragraph')
    expect(chunks.join(' ').replace(/\s+/g, ' ')).toContain('Second paragraph')
  })

  it('splits at newline if no paragraph break', () => {
    const text = 'Line one\nLine two\nLine three\nLine four'
    const chunks = splitMessage(text, 20)
    expect(chunks.length).toBeGreaterThan(1)
  })

  it('hard-splits at limit if no natural break', () => {
    const text = 'a'.repeat(50)
    const chunks = splitMessage(text, 20)
    expect(chunks.length).toBe(3) // 20 + 20 + 10
    expect(chunks.every((c) => c.length <= 20)).toBe(true)
  })

  it('preserves all content after splitting', () => {
    const text = 'Hello world. This is a test. Foo bar baz.'
    const chunks = splitMessage(text, 15)
    const joined = chunks.join(' ')
    // All words should be present
    expect(joined).toContain('Hello')
    expect(joined).toContain('test')
    expect(joined).toContain('baz')
  })
})

describe('convertMarkdownTablesToBullets', () => {
  it('converts pipe tables into row-labeled bullets', () => {
    const markdown = [
      'Before',
      '',
      '| Feature | Status | Notes |',
      '| --- | --- | --- |',
      '| Auth | Done | OAuth2 |',
      '| API | WIP | REST only |',
      '',
      'After',
    ].join('\n')

    expect(convertMarkdownTablesToBullets(markdown)).toBe([
      'Before',
      '',
      'Auth',
      '• Status: Done',
      '• Notes: OAuth2',
      '',
      'API',
      '• Status: WIP',
      '• Notes: REST only',
      '',
      'After',
    ].join('\n'))
  })

  it('skips empty table cells', () => {
    const markdown = [
      '| Item | Value | Notes |',
      '| --- | --- | --- |',
      '| One | 1 | |',
    ].join('\n')

    expect(convertMarkdownTablesToBullets(markdown)).toBe([
      'One',
      '• Value: 1',
    ].join('\n'))
  })

  it('leaves non-table pipe text unchanged', () => {
    const markdown = 'Use foo | bar as plain text.'
    expect(convertMarkdownTablesToBullets(markdown)).toBe(markdown)
  })

  it('does not rewrite pipe tables inside fenced code blocks', () => {
    const markdown = [
      '```',
      '| Feature | Status |',
      '| --- | --- |',
      '| Auth | Done |',
      '```',
    ].join('\n')

    expect(convertMarkdownTablesToBullets(markdown)).toBe(markdown)
  })
})

describe('formatToolUse', () => {
  it('includes tool name and input preview', () => {
    const result = formatToolUse('Bash', { command: 'npm test' })
    expect(result).toContain('🔧 Bash')
    expect(result).toContain('npm test')
  })
})

describe('formatPermissionRequest', () => {
  it('includes tool name, input preview, and request ID', () => {
    const result = formatPermissionRequest('Bash', { command: 'rm -rf /' }, 'abcde')
    expect(result).toContain('🔐')
    expect(result).toContain('Bash')
    expect(result).toContain('abcde')
    expect(result).toContain('rm -rf')
  })
})

describe('truncateInput', () => {
  it('returns short input as-is', () => {
    expect(truncateInput('hello', 100)).toBe('hello')
  })

  it('truncates long input with ellipsis', () => {
    const long = 'x'.repeat(300)
    const result = truncateInput(long, 100)
    expect(result.length).toBe(101) // 100 chars + '…'
    expect(result.endsWith('…')).toBe(true)
  })

  it('handles objects by stringifying', () => {
    const result = truncateInput({ key: 'value' }, 100)
    expect(result).toContain('key')
    expect(result).toContain('value')
  })

  it('handles unserializable input', () => {
    const circular: any = {}
    circular.self = circular
    expect(truncateInput(circular, 100)).toBe('(unserializable)')
  })
})

describe('escapeMarkdownV2', () => {
  it('escapes special characters', () => {
    expect(escapeMarkdownV2('hello_world')).toBe('hello\\_world')
    expect(escapeMarkdownV2('a*b*c')).toBe('a\\*b\\*c')
    expect(escapeMarkdownV2('test.md')).toBe('test\\.md')
  })

  it('leaves plain text unchanged', () => {
    expect(escapeMarkdownV2('hello world')).toBe('hello world')
  })
})

describe('formatImHelp', () => {
  it('lists the lightweight IM commands', () => {
    const text = formatImHelp()
    expect(text).toContain('/new')
    expect(text).toContain('/projects')
    expect(text).toContain('/status')
    expect(text).toContain('/clear')
    expect(text).toContain('/stop')
    expect(text).toContain('/help')
    expect(text).toContain('项目列表')
    expect(text).toContain('/allow <id>')
  })
})

describe('formatImStatus', () => {
  it('formats an active session summary for mobile reading', () => {
    const text = formatImStatus({
      sessionId: 'abc1234567890',
      projectName: 'claude-code-haha',
      branch: 'main',
      model: 'claude-sonnet',
      state: 'tool_executing',
      verb: 'Running tests',
      pendingPermissionCount: 1,
      taskCounts: {
        total: 4,
        pending: 1,
        inProgress: 2,
        completed: 1,
      },
    })

    expect(text).toContain('项目: claude-code-haha (main)')
    expect(text).toContain('会话: abc12345…')
    expect(text).toContain('模型: claude-sonnet')
    expect(text).toContain('状态: 执行工具中 (Running tests)')
    expect(text).toContain('审批: 1 个待确认')
    expect(text).toContain('任务: 总计 4 · 进行中 2 · 待处理 1 · 已完成 1')
  })

  it('returns a friendly empty-session message when nothing is active', () => {
    const text = formatImStatus(null)
    expect(text).toContain('当前没有活动会话')
    expect(text).toContain('/new')
    expect(text).toContain('/projects')
  })
})