import test from 'brittle'
import {
  parseComposeFile,
  validateComposeFile,
  removeComposeStack,
} from '../server/utils/composeManager.js'

/**
 * Minimal dockerode-shaped mock for removeComposeStack.
 * @param {{ containers?: object[], networks?: object[] }} seed
 */
function mockDocker(seed = {}) {
  const containers = [...(seed.containers || [])]
  const networks = [...(seed.networks || [])]
  const removedNetworks = []
  const removedContainers = []

  return {
    removedNetworks,
    removedContainers,
    listContainers: async () => containers,
    listNetworks: async () => networks,
    getContainer: (id) => ({
      stop: async () => {},
      remove: async () => {
        removedContainers.push(id)
        const i = containers.findIndex((c) => c.Id === id)
        if (i >= 0) containers.splice(i, 1)
      },
    }),
    getNetwork: (id) => ({
      remove: async () => {
        const n = networks.find((x) => x.Id === id)
        if (!n) throw new Error(`network ${id} not found`)
        removedNetworks.push({ id, name: n.Name })
        const i = networks.findIndex((x) => x.Id === id)
        if (i >= 0) networks.splice(i, 1)
      },
    }),
  }
}

const SAMPLE = `
version: "3.8"
services:
  web:
    image: nginx:alpine
    ports:
      - "8080:80"
    environment:
      FOO: bar
      BAZ: "1"
    volumes:
      - ./data:/data:ro
    depends_on:
      - db
    restart: unless-stopped
  db:
    image: postgres:16
    environment:
      - POSTGRES_PASSWORD=secret
    networks:
      - backend
networks:
  backend:
volumes:
  pgdata:
`

test('parseComposeFile uses js-yaml and normalizes services', (t) => {
  const parsed = parseComposeFile(SAMPLE)
  t.is(parsed.version, '3.8')
  t.ok(parsed.services.web)
  t.ok(parsed.services.db)
  t.is(parsed.services.web.image, 'nginx:alpine')
  t.alike(parsed.services.web.ports, ['8080:80'])
  t.ok(parsed.services.web.environment.includes('FOO=bar'))
  t.ok(parsed.services.web.depends_on.includes('db'))
  t.is(parsed.services.web.restart, 'unless-stopped')
  t.ok(parsed.services.db.environment.some((e) => e.includes('POSTGRES_PASSWORD')))
  t.ok(Object.prototype.hasOwnProperty.call(parsed.networks, 'backend'))
})

test('parseComposeFile rejects invalid YAML', (t) => {
  try {
    parseComposeFile('services: [')
    t.fail('should throw')
  } catch (err) {
    t.ok(/Invalid compose YAML/i.test(err.message))
  }
})

test('parseComposeFile requires services mapping', (t) => {
  try {
    parseComposeFile('version: "3"\n')
    t.fail('should throw')
  } catch (err) {
    t.ok(/services/i.test(err.message))
  }
})

test('validateComposeFile requires image or build', (t) => {
  try {
    validateComposeFile(`
services:
  bad:
    command: echo hi
`)
    t.fail('should throw')
  } catch (err) {
    t.ok(/image or build/i.test(err.message))
  }
})

test('validateComposeFile accepts build-only service', (t) => {
  const parsed = validateComposeFile(`
services:
  app:
    build: .
`)
  t.ok(parsed.services.app.build)
})

test('removeComposeStack removes project networks after containers', async (t) => {
  const docker = mockDocker({
    containers: [
      {
        Id: 'c1',
        State: 'running',
        Labels: { 'com.docker.compose.project': 'mystack' },
      },
    ],
    networks: [
      {
        Id: 'n1',
        Name: 'mystack_default',
        Labels: { 'com.docker.compose.project': 'mystack' },
      },
      {
        Id: 'n2',
        Name: 'other_default',
        Labels: { 'com.docker.compose.project': 'other' },
      },
      {
        Id: 'bridge',
        Name: 'bridge',
        Labels: {},
      },
    ],
  })

  const result = await removeComposeStack(docker, 'mystack')
  t.is(result.removed, 1)
  t.is(result.networksRemoved, 1)
  t.alike(docker.removedContainers, ['c1'])
  t.is(docker.removedNetworks.length, 1)
  t.is(docker.removedNetworks[0].name, 'mystack_default')
})

test('removeComposeStack cleans orphaned project networks with no containers', async (t) => {
  const docker = mockDocker({
    containers: [],
    networks: [
      {
        Id: 'n1',
        Name: 'orphan_backend',
        Labels: { 'com.docker.compose.project': 'orphan' },
      },
    ],
  })

  const result = await removeComposeStack(docker, 'orphan')
  t.is(result.removed, 0)
  t.is(result.networksRemoved, 1)
  t.is(docker.removedNetworks[0].name, 'orphan_backend')
})

test('removeComposeStack reports already removed when nothing matches', async (t) => {
  const docker = mockDocker({
    containers: [],
    networks: [{ Id: 'bridge', Name: 'bridge', Labels: {} }],
  })

  const result = await removeComposeStack(docker, 'missing')
  t.is(result.removed, 0)
  t.is(result.networksRemoved, 0)
  t.ok(/not found|already removed/i.test(result.message))
})