const test = require('ava')
const Either = require('fp-ts/Either')
const { pipe } = require('fp-ts/function')

const Config = require('../src/config.js')

const fail = (t, cfg) => {
  const res = Config.parse(cfg)
  t.assert(Either.isLeft(res), 'parsing erroneously succeeded')
}

const pass = (t, cfg, { ret } = { ret: false }) => {
  const res = Config.parse(cfg)
  const parsed = Either.getOrElse(e => {
    throw e
  })(res)
  if (ret) {
    return parsed
  } else {
    t.pass()
  }
}

test('config fails when top-level node is not array', t => {
  fail(t, `foo: 'bar'`)
  fail(t, `'bar'`)
  pass(t, '[]')
})

test('config fails when service unknown', t => {
  fail(t, `- foo`)
  fail(
    t,
    `
- foo:
    bar: 'baz'
`,
  )
})

test('config fails when linux_user bad', t => {
  const rest = `network:
      interface: 'public'
      port: 1
      domain: 'db.foo.org'
      ssl: false
    postgres:
      username: 'postgres'
      password: 'password'`

  fail(
    t,
    `
- db:
    ${rest}
`,
  )

  fail(
    t,
    `
- db:
    linux_user:
      persist: []
    ${rest}
`,
  )

  pass(
    t,
    `
- db:
    linux_user:
      username: 'foo'
    ${rest}
`,
  )
})

test('config fails when linux_user.persist is not subpath of homedir', t => {
  const rest = `network:
      interface : 'public'
      port: 1
      domain: 'db.foo.org'
      ssl: false
    postgres:
      username: 'postgres'
      password: 'password'`

  fail(
    t,
    `
- db:
    linux_user:
      username: 'foo'
      persist: ['/tmp']
    ${rest}`,
  )

  fail(
    t,
    `
- db:
    linux_user:
      username: 'foo'
      persist: ['../tmp']
    ${rest}`,
  )

  const parsed = pass(
    t,
    `
- db:
    linux_user:
      username: 'foo'
      persist: 
        - '/home/foo/bar'
        - './bar/baz'
        - './tmp'
    ${rest}`,
    { ret: true },
  )

  t.deepEqual(parsed[0].linuxUser.persist, [
    '/home/foo/bar',
    '/home/foo/bar/baz',
    '/home/foo/tmp',
  ])
})

test('config fails when bad combo of network.interface and network.domain', t => {
  const rest = `linux_user:
      username: 'foo'
    postgres:
      username: 'postgres'
      password: 'password'`

  fail(
    t,
    `
- db:
    network:
      interface: 'public'
      port: 1
      ssl: false
    ${rest}`,
  )

  fail(
    t,
    `
- db:
    network:
      interface: 'local'
      domain: 'foo.org'
      port: 1
      ssl: false
    ${rest}`,
  )

  pass(
    t,
    `
- db:
    network:
      interface: 'public'
      domain: 'foo.org'
      port: 1
      ssl: false
    ${rest}`,
  )

  pass(
    t,
    `
- db:
    network:
      interface: 'local'
      port: 1
      ssl: false
    ${rest}`,
  )
})

test('config fails when postgres bad', t => {
  const rest = `linux_user:
      username: 'foo'
    network:
      interface: 'local'
      port: 1
      ssl: false`

  fail(
    t,
    `
- db:
    ${rest}
`,
  )

  fail(
    t,
    `
- db:
    postgres:
      username: 'foo'
    ${rest}
`,
  )

  fail(
    t,
    `
- db:
    postgres:
      password: 'foo'
    ${rest}
`,
  )

  fail(
    t,
    `
- db:
    postgres:
      username: 'foo'
      password: 'foo'
      data_dir: '/tmp'
    ${rest}`,
  )

  fail(
    t,
    `
- db:
    postgres:
      username: 'foo'
      password: 'foo'
      data_dir: '/tmp'
    ${rest}`,
  )

  pass(
    t,
    `
- db:
    postgres:
      username: 'foo'
      password: 'foo'
      data_dir: 'data'
    ${rest}
`,
  )

  pass(
    t,
    `
- db:
    postgres:
      username: 'foo'
      password: 'foo'
      data_dir: '/home/foo/data'
    ${rest}
`,
  )

  pass(
    t,
    `
- db:
    postgres:
      username: 'foo'
      password: 'foo'
    ${rest}
`,
  )
})

test('config allows multiple services', t => {
  const one = (un, port) => `
- db:
    postgres:
      username: 'foo'
      password: 'bar'
    linux_user:
      username: '${un}'
    network:
      interface: 'local'
      port: ${port}
      ssl: false`

  pass(
    t,
    `
${one('a', 0)}
${one('b', 1)}
`,
  )
})

test('config fails when port, linux_user.username, or domain reused', t => {
  const one = (un, port, domain) => `
- db:
    postgres:
      username: 'foo'
      password: 'bar'
    linux_user:
      username: '${un}'
    network:
      interface: 'public'
      port: ${port}
      domain: ${domain}
      ssl: false`

  fail(
    t,
    `
${one('a', 0, 'foo.org')}
${one('b', 1, 'foo.org')}
`,
  )

  fail(
    t,
    `
${one('a', 1, 'foo.baz.org')}
${one('b', 1, 'foo.org')}
`,
  )

  fail(
    t,
    `
${one('a', 0, 'foo.baz.org')}
${one('a', 1, 'foo.org')}
`,
  )

  pass(
    t,
    `
${one('a', 0, 'foo.baz.org')}
${one('b', 1, 'foo.org')}
`,
  )
})