var expect = require('expect')
var Router = require('../lib/router')
var NotFoundError = require('../lib/error').NotFound

describe('Router', function () {
  it('→ exists', function () {
    expect(Router).toExist()
  })

  it('→ add root node', function (done) {
    var router = new Router()
    router.add('/', function () { return 'some value' })
    router.route('/', function (err, handlerResult) {
      expect(err).toBe(null)
      expect(handlerResult).toBe('some value')
      done()
    })
  })

  it('→ add/get nested route', function (done) {
    var router = new Router()
    router.add('/some/path/here', function () { return 'some value' })
    router.route('/some/path/here', function (err, handlerResult) {
      expect(err).toBe(null)
      expect(handlerResult).toBe('some value')
      done()
    })
  })

  it('→ partial route is a not found error', function (done) {
    var router = new Router()
    router.add(['/user', /^(\d+)$/], function (number) { return number })
    router.route('/user/', function (err) {
      expect(err).toBeA(NotFoundError)
      done()
    })
  })

  it('→ get error in callback for missing handler', function (done) {
    var router = new Router()
    router.route('/some/fake/path', function (err, handlerResult) {
      expect(err).toBeA(Error)
      expect(err.message).toMatch(/not found/)
      expect(handlerResult).toNotExist()
      done()
    })
  })

  it('→ get routes based on regex', function (done) {
    var router = new Router()
    router.add(['/by/id', /\d+/], function (someId) {
      expect(someId).toBe('123')
    })

    router.route('/by/id/123', function (err) {
      expect(err).toBe(null, err && err.message)
      done()
    })
  })

  it('→ regex routes can return NotFoundError', function (done) {
    var router = new Router()
    router.add(['/by/id', /\d+/], function () {})
    router.route('/by/id/not-an-id', function (err) {
      expect(err).toBeA(NotFoundError)
      done()
    })
  })

  it('→ get based on regex with multiple captures global', function (done) {
    var router = new Router()
    router.add(['by', 'order', /(\d+)/g], function (one, two, three) {
      expect(one).toBe('1')
      expect(two).toBe('2')
      expect(three).toBe('3')
    })

    router.route('/by/order/1-2-3', function (err) {
      expect(err).toBe(null, err && err.message)
      done()
    })
  })

  it('→ get based regex with multiple captures not global', function (done) {
    var router = new Router()
    router.add(['by', 'order', /(\d+)/], function (one, two, three) {
      expect(one).toBe('1')
      expect(two).toNotExist()
      expect(three).toNotExist()
    })

    router.route('/by/order/1-2-3', function (err) {
      expect(err).toBe(null, err && err.message)
      done()
    })
  })

  it('→ pass in arguments before capturing path arguments', function (done) {
    var router = new Router()
    var api = {key: 123, any: 'object is passed', method: function () {}}
    router.add(['/by/order', /(\d+)/], function (inputApi, urlParam) {
      expect(inputApi).toBe(api)
      expect(urlParam).toBe('123')
      done()
    })

    router.route('/by/order/123', {args: [api]})
  })

  function toInt(part) {
    var results = /^(\d+)$/.exec(part)
    if (results) {
      return parseInt(results[0], 10)
    } else {
      return null
    }
  }
  it('→ get based on function', function (done) {
    var router = new Router()
    router.add(['by', 'order', toInt], function (val) {
      expect(val).toBe(123)
    })

    router.route('/by/order/123', function (err) {
      expect(err).toBe(null)
      done()
    })
  })

  it('→ function routes can return NotFoundError', function (done) {
    var router = new Router()
    router.add(['/by/order', toInt], function () {})
    router.route('/by/order/not-found', function (err) {
      expect(err).toBeA(NotFoundError)
      done()
    })
  })

  it('→ check not found error', function (done) {
    var router = new Router()
    router.route('/not/real/id', function (err) {
      expect(Router.isNotFound(err)).toBe(true)
      done()
    })
  })

  it('→ check not found error on not real error', function () {
    expect(Router.isNotFound(new Error('Not the missing error'))).toBe(false)
  })
})