import { Eltro as t, assert} from 'eltro'
import { Flaska, FlaskaRouter } from '../flaska.mjs'
import { fakeHttp, createCtx, spy } from './helper.mjs'

const fakerHttp = fakeHttp()
const fakeStream = { pipeline: spy() }

t.describe('#requestEnd()', function() {
  t.test('calls onerror correctly on error', function(cb) {
    const assertError = new Error('test')
    const assertBody = { a: 1 }
    const assertStatus = 501
    // Calculated manually just in case
    const assertBodyLength = 7
    let onFinish = function(body) {
      try {
        assert.strictEqual(ctx.status, assertStatus)
        assert.strictEqual(ctx.body, assertBody)
        assert.strictEqual(ctx.res.statusCode, assertStatus)
        assert.strictEqual(ctx.res.setHeader.callCount, 2)
        assert.strictEqual(ctx.res.setHeader.firstCall[0], 'Content-Type')
        assert.strictEqual(ctx.res.setHeader.firstCall[1], 'application/json; charset=utf-8')
        assert.strictEqual(ctx.res.setHeader.secondCall[0], 'Content-Length')
        assert.strictEqual(ctx.res.setHeader.secondCall[1], assertBodyLength)
        assert.ok(body)
        assert.strictEqual(body, '{"a":1}')
        cb()
      } catch (err) { cb(err) }
    }
    const ctx = createCtx({}, onFinish)

    let flaska = new Flaska({}, fakerHttp, fakeStream)
    flaska.onerror(function(err, inctx) {
      assert.strictEqual(err, assertError)
      assert.strictEqual(inctx, ctx)
      inctx.status = assertStatus
      inctx.body = assertBody
    })

    flaska.requestEnd(assertError, ctx)
  })

  t.test('call res and end correctly when dealing with objects', function(cb) {
    const assertStatus = 202
    // Calculated manually just in case
    const assertBodyLength = 7
    const assertBody = { a: 1 }
    let onFinish = function(body) {
      try {
        assert.strictEqual(ctx.status, assertStatus)
        assert.strictEqual(ctx.body, assertBody)
        assert.strictEqual(ctx.res.statusCode, assertStatus)
        assert.strictEqual(ctx.res.setHeader.callCount, 2)
        assert.strictEqual(ctx.res.setHeader.firstCall[0], 'Content-Type')
        assert.strictEqual(ctx.res.setHeader.firstCall[1], 'application/json; charset=utf-8')
        assert.strictEqual(ctx.res.setHeader.secondCall[0], 'Content-Length')
        assert.strictEqual(ctx.res.setHeader.secondCall[1], assertBodyLength)
        assert.ok(body)
        assert.strictEqual(body, '{"a":1}')
        cb()
      } catch (err) { cb(err) }
    }
    const ctx = createCtx({
      status: assertStatus,
    }, onFinish)
    ctx.body = assertBody

    let flaska = new Flaska({}, fakerHttp, fakeStream)
    flaska.requestEnd(null, ctx)
  })
  
  t.test('call res and end correctly when dealing with strings', function(cb) {
    const assertStatus = 206
    // Calculated manually just in case
    const assertBodyLength = 4
    const assertBody = 'eða'
    let onFinish = function(body) {
      try {
        assert.strictEqual(ctx.status, assertStatus)
        assert.strictEqual(ctx.body, assertBody)
        assert.strictEqual(ctx.res.statusCode, assertStatus)
        assert.strictEqual(ctx.res.setHeader.callCount, 2)
        assert.strictEqual(ctx.res.setHeader.firstCall[0], 'Content-Type')
        assert.strictEqual(ctx.res.setHeader.firstCall[1], 'text/plain; charset=utf-8')
        assert.strictEqual(ctx.res.setHeader.secondCall[0], 'Content-Length')
        assert.strictEqual(ctx.res.setHeader.secondCall[1], assertBodyLength)
        assert.ok(body)
        assert.strictEqual(body, assertBody)
        cb()
      } catch (err) { cb(err) }
    }
    const ctx = createCtx({
      status: assertStatus,
    }, onFinish)
    ctx.body = assertBody

    let flaska = new Flaska({}, fakerHttp, fakeStream)
    flaska.requestEnd(null, ctx)
  })
  
  t.test('call res and end correctly when dealing with numbers', function(cb) {
    const assertStatus = 211
    // Calculated manually just in case
    const assertBodyLength = 7
    const assertBody = 4214124
    let onFinish = function(body) {
      try {
        assert.strictEqual(ctx.status, assertStatus)
        assert.strictEqual(ctx.body, assertBody)
        assert.strictEqual(ctx.res.statusCode, assertStatus)
        assert.strictEqual(ctx.res.setHeader.callCount, 2)
        assert.strictEqual(ctx.res.setHeader.firstCall[0], 'Content-Type')
        assert.strictEqual(ctx.res.setHeader.firstCall[1], 'text/plain; charset=utf-8')
        assert.strictEqual(ctx.res.setHeader.secondCall[0], 'Content-Length')
        assert.strictEqual(ctx.res.setHeader.secondCall[1], assertBodyLength)
        assert.ok(body)
        assert.strictEqual(body, assertBody.toString())
        cb()
      } catch (err) { cb(err) }
    }
    const ctx = createCtx({
      status: assertStatus,
    }, onFinish)
    ctx.body = assertBody

    let flaska = new Flaska({}, fakerHttp, fakeStream)
    flaska.requestEnd(null, ctx)
  })

  t.test('call res and end correctly when dealing with custom type', function(cb) {
    const assertStatus = 209
    const assertBody = 'test'
    const assertType = 'something/else'
    let onFinish = function(body) {
      try {
        assert.strictEqual(ctx.status, assertStatus)
        assert.strictEqual(ctx.res.statusCode, assertStatus)
        assert.strictEqual(ctx.res.setHeader.firstCall[0], 'Content-Type')
        assert.strictEqual(ctx.res.setHeader.firstCall[1], assertType)
        assert.strictEqual(body, assertBody)
        cb()
      } catch (err) { cb(err) }
    }
    const ctx = createCtx({
      status: assertStatus,
      body: assertBody,
    }, onFinish)
    ctx.type = assertType

    let flaska = new Flaska({}, fakerHttp, fakeStream)
    flaska.requestEnd(null, ctx)
  })

  t.test('call pipeline correctly when dealing with pipe', function(cb) {
    const assertStatus = 211
    const assertType = 'herp/derp'
    const assertBody = { pipe: function() {} }

    let onFinish = function(source, target, callback) {
      try {
        assert.strictEqual(ctx.status, assertStatus)
        assert.strictEqual(ctx.res.statusCode, assertStatus)
        assert.strictEqual(ctx.res.setHeader.firstCall[0], 'Content-Type')
        assert.strictEqual(ctx.res.setHeader.firstCall[1], assertType)
        assert.strictEqual(source, assertBody)
        assert.strictEqual(target, ctx.res)
        assert.strictEqual(typeof(callback), 'function')
        cb()
      } catch (err) { cb(err) }
    }
    const ctx = createCtx({
      status: assertStatus,
    })
    fakeStream.pipeline = onFinish

    ctx.body = assertBody
    ctx.type = assertType
    let flaska = new Flaska({}, fakerHttp, fakeStream)
    flaska.requestEnd(null, ctx)
  })

  t.test('call pipe should have default type', function(cb) {
    let onFinish = function(source, target) {
      try {
        assert.strictEqual(ctx.res.statusCode, 200)
        assert.strictEqual(ctx.res.setHeader.firstCall[0], 'Content-Type')
        assert.strictEqual(ctx.res.setHeader.firstCall[1], 'application/octet-stream')
        assert.strictEqual(source, ctx.body)
        assert.strictEqual(target, ctx.res)
        cb()
      } catch (err) { cb(err) }
    }
    const ctx = createCtx({})
    ctx.body = { pipe: function() {} }
    fakeStream.pipeline = onFinish

    let flaska = new Flaska({}, fakerHttp, fakeStream)
    flaska.requestEnd(null, ctx)
  })
  
  t.test('should return immediately if req is finished', function() {
    let onFinish = function() {
      throw new Error('should not be called')
    }
    const ctx = createCtx({ }, onFinish)
    ctx.res.writableEnded = true

    let flaska = new Flaska({}, fakerHttp, fakeStream)
    flaska.requestEnd(null, ctx)
  })
  
  const emptyStatuses = [204, 205, 304]

  emptyStatuses.forEach(function(status) {
    t.test('call res and end correctly when dealing with status ' + status, function(cb) {
      const assertStatus = status
      const assertNotBody = 'test'
      const assertNotType = 'something/else'
      let onFinish = function(body) {
        try {
          assert.strictEqual(ctx.status, assertStatus)
          assert.strictEqual(ctx.res.statusCode, assertStatus)
          assert.strictEqual(ctx.res.setHeader.callCount, 0)
          assert.notOk(body)
          cb()
        } catch (err) { cb(err) }
      }
      const ctx = createCtx({
        status: assertStatus,
        body: assertNotBody,
      }, onFinish)
      ctx.type = assertNotType
  
      let flaska = new Flaska({}, fakerHttp, fakeStream)
      flaska.requestEnd(null, ctx)
    })
  })
})

t.describe('#requestEnded()', function() {
  t.test('calls afterCompiled correctly', function() {
    const assertError = new Error('test')
    const assertCtx = createCtx()
    let flaska = new Flaska({}, fakerHttp)

    flaska._afterCompiled = function(ctx) {
      assert.strictEqual(ctx, assertCtx)
      throw assertError
    }

    assert.throws(function() {
      flaska.requestEnded(assertCtx)
    }, /test/)
  })

  t.test('calls afterAsyncCompiled correctly if defined', async function() {
    const assertError = new Error('test')
    const assertCtx = createCtx()
    let flaska = new Flaska({}, fakerHttp)
    flaska.compile()

    flaska._afterAsyncCompiled = function(ctx) {
      assert.strictEqual(ctx, assertCtx)
      return Promise.resolve().then(function() { return Promise.reject(assertError) })
    }

    let err = await assert.isRejected(flaska.requestEnded(assertCtx))

    assert.strictEqual(err, assertError)
  })
})