import { describe, it, expect, vi, beforeEach } from 'vitest'
import * as fc from 'fast-check'
import ConfigurationService from '../../app/services/configuration_service.js'
import ConfigurationModel from '../../app/models/configuration.js'
import ConfigurationVersionModel from '../../app/models/configuration_version.js'

/**
 * **Validates: Requirements 1.5**
 *
 * Property 2: Delete removes Configuration completely
 * After deleting a Configuration, findById returns null and all versions are also deleted.
 */

vi.mock('../../app/models/configuration.js', () => ({
  default: {
    deleteByIdentifier: vi.fn(),
    findByIdentifier: vi.fn(),
  },
}))

vi.mock('../../app/models/configuration_version.js', () => ({
  default: {
    deleteByConfigurationIdentifier: vi.fn(),
  },
}))

// Arbitrary: generates a valid configuration identifier (alphanumeric + hyphens/underscores, starts with alphanumeric)
const identifierArb = fc
  .tuple(
    fc.constantFrom(
      ...'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'.split('')
    ),
    fc.array(
      fc.constantFrom(
        ...'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_'.split('')
      ),
      { minLength: 0, maxLength: 29 }
    )
  )
  .map(([first, rest]) => first + rest.join(''))

describe('Property 2: Delete removes Configuration completely', () => {
  beforeEach(() => {
    vi.clearAllMocks()
  })

  it('delete calls deleteByIdentifier on ConfigurationModel for any identifier', async () => {
    await fc.assert(
      fc.asyncProperty(identifierArb, async (identifier) => {
        vi.mocked(ConfigurationModel.deleteByIdentifier).mockResolvedValue(true)
        vi.mocked(ConfigurationVersionModel.deleteByConfigurationIdentifier).mockResolvedValue(0)

        const service = new ConfigurationService()
        const result = await service.delete(identifier)

        expect(result).toBe(true)
        expect(ConfigurationModel.deleteByIdentifier).toHaveBeenCalledWith(identifier)

        vi.clearAllMocks()
      }),
      { numRuns: 100 }
    )
  })

  it('delete calls deleteByConfigurationIdentifier on ConfigurationVersionModel when configuration exists', async () => {
    await fc.assert(
      fc.asyncProperty(identifierArb, async (identifier) => {
        vi.mocked(ConfigurationModel.deleteByIdentifier).mockResolvedValue(true)
        vi.mocked(ConfigurationVersionModel.deleteByConfigurationIdentifier).mockResolvedValue(3)

        const service = new ConfigurationService()
        await service.delete(identifier)

        expect(ConfigurationVersionModel.deleteByConfigurationIdentifier).toHaveBeenCalledWith(
          identifier
        )

        vi.clearAllMocks()
      }),
      { numRuns: 100 }
    )
  })

  it('delete does NOT call deleteByConfigurationIdentifier when configuration does not exist', async () => {
    await fc.assert(
      fc.asyncProperty(identifierArb, async (identifier) => {
        vi.mocked(ConfigurationModel.deleteByIdentifier).mockResolvedValue(false)

        const service = new ConfigurationService()
        const result = await service.delete(identifier)

        expect(result).toBe(false)
        expect(
          ConfigurationVersionModel.deleteByConfigurationIdentifier
        ).not.toHaveBeenCalled()

        vi.clearAllMocks()
      }),
      { numRuns: 100 }
    )
  })

  it('after delete returns true, findById returns null for any identifier', async () => {
    await fc.assert(
      fc.asyncProperty(identifierArb, async (identifier) => {
        vi.mocked(ConfigurationModel.deleteByIdentifier).mockResolvedValue(true)
        vi.mocked(ConfigurationVersionModel.deleteByConfigurationIdentifier).mockResolvedValue(0)
        vi.mocked(ConfigurationModel.findByIdentifier).mockResolvedValue(null)

        const service = new ConfigurationService()
        await service.delete(identifier)

        const found = await service.findById(identifier)
        expect(found).toBeNull()
        expect(ConfigurationModel.findByIdentifier).toHaveBeenCalledWith(identifier)

        vi.clearAllMocks()
      }),
      { numRuns: 100 }
    )
  })
})