import { describe, expect, it } from 'vitest'
import type { NativeChatMessage } from './native-chat-types'
import {
  parseNativeChatCommandEnvelope,
  surfaceSkillInvocationUserTurns
} from './native-chat-command-envelope'

const CATALOG = new Set(['clear', 'model'])

function userTurn(text: string, overrides: Partial<NativeChatMessage> = {}): NativeChatMessage {
  return {
    id: 'user-1',
    role: 'user',
    blocks: [{ type: 'text', text }],
    timestamp: 100,
    source: 'transcript',
    ...overrides
  }
}

describe('parseNativeChatCommandEnvelope', () => {
  it('parses name-first and message-first envelope orderings', () => {
    expect(
      parseNativeChatCommandEnvelope(
        '<command-name>/model</command-name>\n  <command-message>model</command-message>\n  <command-args></command-args>'
      )
    ).toEqual({ name: '/model', args: '' })
    expect(
      parseNativeChatCommandEnvelope(
        '<command-message>ce-brainstorm</command-message>\n<command-name>/ce-brainstorm</command-name>\n<command-args>improve the picker</command-args>'
      )
    ).toEqual({ name: '/ce-brainstorm', args: 'improve the picker' })
  })

  it('ignores ordinary prompts and non-leading envelope tags', () => {
    expect(parseNativeChatCommandEnvelope('deploy the app')).toBeNull()
    expect(parseNativeChatCommandEnvelope('see <command-name>/x</command-name>')).toBeNull()
    expect(parseNativeChatCommandEnvelope('<commander>/x</commander>')).toBeNull()
  })
})

describe('surfaceSkillInvocationUserTurns', () => {
  it('renders a skill-invocation envelope as the literal user token', () => {
    const messages = [
      userTurn(
        '<command-message>ce-brainstorm</command-message>\n<command-name>/ce-brainstorm</command-name>\n<command-args>improve the picker</command-args>'
      )
    ]
    const out = surfaceSkillInvocationUserTurns(messages, CATALOG)
    expect(out[0].blocks).toEqual([{ type: 'text', text: '/ce-brainstorm improve the picker' }])
    expect(out[0].id).toBe('user-1')
  })

  it('shortens plugin-qualified names back to the token the user sent', () => {
    const messages = [
      userTurn(
        '<command-message>compound-engineering:ce-brainstorm</command-message>\n<command-name>/compound-engineering:ce-brainstorm</command-name>\n<command-args>hi</command-args>'
      )
    ]
    const out = surfaceSkillInvocationUserTurns(messages, CATALOG)
    expect(out[0].blocks).toEqual([{ type: 'text', text: '/ce-brainstorm hi' }])
  })

  it('never hides a plugin skill whose short name shadows a catalog command', () => {
    const messages = [
      userTurn('<command-name>/some-plugin:clear</command-name>\n<command-args></command-args>')
    ]
    const out = surfaceSkillInvocationUserTurns(messages, CATALOG)
    expect(out[0].blocks).toEqual([{ type: 'text', text: '/clear' }])
  })

  it('leaves catalog command envelopes for the noise filter and Ran marker', () => {
    const messages = [
      userTurn('<command-name>/model</command-name>\n<command-args></command-args>')
    ]
    expect(surfaceSkillInvocationUserTurns(messages, CATALOG)).toBe(messages)
  })

  it('does not touch assistant turns, plain prompts, or non-text blocks', () => {
    const messages: NativeChatMessage[] = [
      userTurn('hello there'),
      userTurn('<command-name>/skill</command-name>', {
        id: 'user-2',
        role: 'assistant'
      }),
      userTurn('<command-name>/skill</command-name>', {
        id: 'user-3',
        blocks: [
          { type: 'text', text: '<command-name>/skill</command-name>' },
          { type: 'image-ref', path: '/tmp/a.png' }
        ]
      })
    ]
    expect(surfaceSkillInvocationUserTurns(messages, CATALOG)).toBe(messages)
  })
})