import { describe, test, expect } from 'bun:test'
import { AgentClient, type AgentMessageRequest } from './agent-client'

describe('AgentClient Integration', () => {
  // Note: These tests verify the API surface is correct.
  // Actual agent subprocess spawning is tested manually or in CI
  // where real agent binaries (opencode/claude) are available.

  describe('API compatibility', () => {
    test('mirrors Anthropic SDK interface', () => {
      const client = new AgentClient({
        agent: 'opencode',
        model: 'claude-sonnet-4-20250514',
      })

      // Verify the API surface matches Anthropic SDK
      expect(client.messages).toBeDefined()
      expect(typeof client.messages.create).toBe('function')

      // Verify request structure matches Anthropic SDK
      const validRequest: AgentMessageRequest = {
        model: 'claude-sonnet-4-20250514',
        max_tokens: 4000,
        messages: [{ role: 'user', content: 'Test message' }],
        system: 'You are a helpful assistant',
      }

      // This shouldn't throw TypeScript errors
      expect(validRequest.messages).toHaveLength(1)
    })

    test('supports minimal request format', () => {
      const client = new AgentClient({
        agent: 'claude',
        model: 'claude-sonnet-4-20250514',
      })

      // Minimal valid request
      const minimalRequest: AgentMessageRequest = {
        messages: [{ role: 'user', content: 'Hello' }],
      }

      expect(minimalRequest.messages).toHaveLength(1)
    })

    test('supports multi-turn conversations', () => {
      const client = new AgentClient({
        agent: 'opencode',
        model: 'claude-sonnet-4-20250514',
      })

      const multiTurnRequest: AgentMessageRequest = {
        messages: [
          { role: 'user', content: 'What is 2+2?' },
          { role: 'assistant', content: '4' },
          { role: 'user', content: 'What about 3+3?' },
        ],
      }

      expect(multiTurnRequest.messages).toHaveLength(3)
    })
  })

  describe('configuration', () => {
    test('accepts opencode agent configuration', () => {
      const client = new AgentClient({
        agent: 'opencode',
        model: 'claude-opus-4-20250514',
        workingDir: '/custom/path',
      })

      expect(client).toBeDefined()
      expect(client.messages.create).toBeDefined()
    })

    test('accepts claude agent configuration', () => {
      const client = new AgentClient({
        agent: 'claude',
        model: 'claude-sonnet-4-20250514',
      })

      expect(client).toBeDefined()
      expect(client.messages.create).toBeDefined()
    })

    test('accepts optional model in config', () => {
      // Model can be omitted if it will be provided per-request
      const client = new AgentClient({
        agent: 'opencode',
      })

      expect(client).toBeDefined()
    })
  })
})