import { describe, it, expect } from 'vitest'
import {
  computeContentHash,
  buildProvisioningCode,
  parseProvisioningCode,
} from '../../../app/utils/provisioning_code.js'
import type { Configuration } from '../../../app/domain/configuration/configuration.js'
import { PolicyType } from '../../../app/domain/configuration/configuration.js'

function makeConfig(overrides: Partial<Configuration> = {}): Configuration {
  return {
    identifier: 'BM632w-standard',
    name: 'Configuration standard BM632w',
    version: '1.0.1',
    priority: 100,
    policy: PolicyType.ONCE,
    enabled: true,
    tags: [],
    criteria: { productClass: 'BM632w' },
    inventory: [],
    desiredParameters: [
      { name: 'Device.Param.B', value: 'hello', type: 'string' },
      { name: 'Device.Param.A', value: 42, type: 'int' },
    ],
    firmwareTarget: { productClass: 'BM632w', targetVersion: '2.1.0' },
    createdAt: new Date(),
    updatedAt: new Date(),
    ...overrides,
  }
}

describe('computeContentHash', () => {
  it('returns a 12-character hex string', () => {
    const hash = computeContentHash(makeConfig())
    expect(hash).toMatch(/^[a-f0-9]{12}$/)
  })

  it('is deterministic for the same config', () => {
    const config = makeConfig()
    expect(computeContentHash(config)).toBe(computeContentHash(config))
  })

  it('sorts desiredParameters by name for consistency', () => {
    const config1 = makeConfig({
      desiredParameters: [
        { name: 'B.Param', value: 1, type: 'int' },
        { name: 'A.Param', value: 2, type: 'int' },
      ],
    })
    const config2 = makeConfig({
      desiredParameters: [
        { name: 'A.Param', value: 2, type: 'int' },
        { name: 'B.Param', value: 1, type: 'int' },
      ],
    })
    expect(computeContentHash(config1)).toBe(computeContentHash(config2))
  })

  it('changes when desiredParameters change', () => {
    const config1 = makeConfig({
      desiredParameters: [{ name: 'A.Param', value: 1, type: 'int' }],
    })
    const config2 = makeConfig({
      desiredParameters: [{ name: 'A.Param', value: 2, type: 'int' }],
    })
    expect(computeContentHash(config1)).not.toBe(computeContentHash(config2))
  })

  it('changes when firmwareTarget changes', () => {
    const config1 = makeConfig({
      firmwareTarget: { productClass: 'BM632w', targetVersion: '2.0.0' },
    })
    const config2 = makeConfig({
      firmwareTarget: { productClass: 'BM632w', targetVersion: '3.0.0' },
    })
    expect(computeContentHash(config1)).not.toBe(computeContentHash(config2))
  })
})

describe('buildProvisioningCode', () => {
  it('returns the correct format', () => {
    const config = makeConfig()
    const code = buildProvisioningCode(config)
    expect(code).toMatch(/^BM632w-standard\(v1\.0\.1\)-[a-f0-9]{12}$/)
  })

  it('matches the regex pattern from the spec', () => {
    const config = makeConfig()
    const code = buildProvisioningCode(config)
    expect(code).toMatch(/^(.+)\(v(.+)\)-([a-f0-9]{12})$/)
  })
})

describe('parseProvisioningCode', () => {
  it('parses a valid provisioning code', () => {
    const result = parseProvisioningCode('BM632w-standard(v1.0.1)-a1b2c3d4e5f6')
    expect(result).toEqual({
      identifier: 'BM632w-standard',
      version: '1.0.1',
      hash: 'a1b2c3d4e5f6',
    })
  })

  it('returns null for invalid format', () => {
    expect(parseProvisioningCode('invalid')).toBeNull()
    expect(parseProvisioningCode('')).toBeNull()
    expect(parseProvisioningCode('id(v1.0)-short')).toBeNull() // hash too short
  })

  it('round-trips with buildProvisioningCode', () => {
    const config = makeConfig()
    const code = buildProvisioningCode(config)
    const parsed = parseProvisioningCode(code)
    expect(parsed).not.toBeNull()
    expect(parsed!.identifier).toBe('BM632w-standard')
    expect(parsed!.version).toBe('1.0.1')
    expect(parsed!.hash).toMatch(/^[a-f0-9]{12}$/)
  })
})