import { Eltro as t, spy, assert, stub} from 'eltro'
import { FileResponse, Flaska, FlaskaRouter } from '../flaska.mjs'
import { fakeHttp, createCtx } 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 = cb.finish(function(body) {
      assert.strictEqual(ctx.status, assertStatus)
      assert.strictEqual(ctx.body, assertBody)
      assert.strictEqual(ctx.headers['Content-Type'], 'application/json; charset=utf-8')
      assert.strictEqual(ctx.headers['Content-Length'], assertBodyLength)
      assert.ok(body)
      assert.strictEqual(body, '{"a":1}')
      assert.ok(ctx.res.writeHead.called)
      assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
      assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
    })
    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('calls backup onerror correctly if error throws', function(cb) {
    const assertErrorNotSeen = new Error('should not be seen')
    const assertError = new Error('test')

    let onFinish = cb.finish(function(body) {
      assert.strictEqual(ctx.status, 500)
      assert.strictEqual(ctx.body.status, 500)
      assert.strictEqual(ctx.body.message, 'Internal Server Error')
    })
    const ctx = createCtx({}, onFinish)

    let flaska = new Flaska({}, fakerHttp, fakeStream)
    flaska.onerror(function() {
      throw assertError
    })

    flaska.requestEnd(assertErrorNotSeen, ctx)
  })

  let testMethods = ['GET', 'HEAD']
  
  testMethods.forEach(function(method) {
    t.describe(method, function() {
      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 = cb.finish(function(body) {
          assert.strictEqual(ctx.status, assertStatus)
          assert.strictEqual(ctx.body, assertBody)
          assert.strictEqual(ctx.headers['Content-Type'], 'application/json; charset=utf-8')
          assert.strictEqual(ctx.headers['Content-Length'], assertBodyLength)

          if (method === 'GET') {
            assert.ok(body)
            assert.strictEqual(body, '{"a":1}')
          } else {
            assert.notOk(body)
          }

          assert.ok(ctx.res.writeHead.called)
          assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
          assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
        })
        const ctx = createCtx({
          method: method,
          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 buffers', function(cb) {
        const assertStatus = 202
        // Calculated manually just in case
        const assertBodyLength = 11
        const assertBody = Buffer.from('hello world')
        let onFinish = cb.finish(function(body) {
          assert.strictEqual(ctx.status, assertStatus)
          assert.strictEqual(ctx.body, assertBody)
          assert.strictEqual(ctx.headers['Content-Type'], 'application/octet-stream')
          assert.strictEqual(ctx.headers['Content-Length'], assertBodyLength)

          if (method === 'GET') {
            assert.ok(body)
            assert.strictEqual(body, assertBody)
          } else {
            assert.notOk(body)
          }

          assert.ok(ctx.res.writeHead.called)
          assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
          assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
        })
        const ctx = createCtx({
          method: method,
          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 null and no status override', function(cb) {
        // Calculated manually just in case
        const assertBodyLength = 0
        const assertBody = null
        let onFinish = cb.finish(function(body) {
          assert.strictEqual(ctx.status, 204)
          assert.strictEqual(ctx.body, assertBody)
          assert.notOk(ctx.headers['Content-Type'])
          assert.notOk(ctx.headers['Content-Length'])

          assert.strictEqual(body, undefined)

          assert.ok(ctx.res.writeHead.called)
          assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
          assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
        })
        const ctx = createCtx({
          method: method,
          status: 200,
        }, onFinish)
        ctx.body = assertBody
    
        let flaska = new Flaska({}, fakerHttp, fakeStream)
        flaska.requestEnd(null, ctx)
      })
      
      t.test('call res and end correctly when dealing with null and status override', function(cb) {
        const assertStatus = 202
        // Calculated manually just in case
        const assertBody = null
        let onFinish = cb.finish(function(body) {
          assert.strictEqual(ctx.status, assertStatus)
          assert.strictEqual(ctx.body, assertBody)
          assert.notOk(ctx.headers['Content-Type'])
          assert.strictEqual(ctx.headers['Content-Length'], 0)

          assert.strictEqual(body, undefined)

          assert.ok(ctx.res.writeHead.called)
          assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
          assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
        })
        const ctx = createCtx({
          method: method,
          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 = cb.finish(function(body) {
          assert.strictEqual(ctx.status, assertStatus)
          assert.strictEqual(ctx.body, assertBody)
          assert.strictEqual(ctx.headers['Content-Type'], 'text/plain; charset=utf-8')
          assert.strictEqual(ctx.headers['Content-Length'], assertBodyLength)

          if (method === 'GET') {
            assert.ok(body)
            assert.strictEqual(body, assertBody)
          } else {
            assert.notOk(body)
          }

          assert.ok(ctx.res.writeHead.called)
          assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
          assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
        })
        const ctx = createCtx({
          method: method,
          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 = cb.finish(function(body) {
          assert.strictEqual(ctx.status, assertStatus)
          assert.strictEqual(ctx.body, assertBody)
          assert.strictEqual(ctx.headers['Content-Type'], 'text/plain; charset=utf-8')
          assert.strictEqual(ctx.headers['Content-Length'], assertBodyLength)

          if (method === 'GET') {
            assert.ok(body)
            assert.strictEqual(body, assertBody.toString())
          } else {
            assert.notOk(body)
          }
          assert.ok(ctx.res.writeHead.called)
          assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
          assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
        })
        const ctx = createCtx({
          method: method,
          status: assertStatus,
        }, onFinish)
        ctx.body = assertBody
    
        let flaska = new Flaska({}, fakerHttp, fakeStream)
        flaska.requestEnd(null, ctx)
      })
    
      if (method === 'GET') {
        t.test('call handleRequest if body contains it', function(cb) {
          const assertContentType = 'test/test'
          const assertContentLength = 1241241
          const assertHandle = stub().returnWith(function(checkCtx, secondary) {
            assert.notOk(secondary)
            assert.strictEqual(checkCtx, ctx)
            assert.notOk(ctx.res.writeHead.called)
            ctx.type = assertContentType
            ctx.headers['Content-Length'] = assertContentLength
            return assertBody
          })

          let body = new FileResponse()
          let assertBody = { pipe: function() {} }
          let onFinish = cb.finish(function(source, target, callback) {
            assert.ok(assertHandle.called)
            assert.ok(ctx.res.writeHead)
            assert.strictEqual(ctx.body, assertBody)
            assert.strictEqual(source, assertBody)
            assert.strictEqual(target, ctx.res)
            assert.strictEqual(typeof(callback), 'function')
            assert.ok(ctx.res.writeHead.called)
            assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
            assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
            assert.strictEqual(ctx.headers['Content-Type'], assertContentType)
            assert.strictEqual(ctx.headers['Content-Length'], assertContentLength)
          })
          const ctx = createCtx({
          })
          ctx.body = body
          fakeStream.pipeline = onFinish
          body.handleRequest = assertHandle
      
          let flaska = new Flaska({}, fakerHttp, fakeStream)

          try {
            flaska.requestEnd(null, ctx)
          } catch (err) {
            cb(err)
          }
        })

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

          let onFinish = cb.finish(function(source, target, callback) {
            assert.strictEqual(ctx.status, assertStatus)
            assert.strictEqual(ctx.headers['Content-Type'], assertType)
            assert.strictEqual(source, assertBody)
            assert.strictEqual(target, ctx.res)
            assert.strictEqual(typeof(callback), 'function')
            assert.ok(ctx.res.writeHead.called)
            assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
            assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
          })
          const ctx = createCtx({
            status: assertStatus,
          })
          fakeStream.pipeline = onFinish

          ctx.body = assertBody
          ctx.type = assertType
          let flaska = new Flaska({}, fakerHttp, fakeStream)
          flaska.requestEnd(null, ctx)
        })
      } else {
        t.test('call handleRequest if body contains it', function(cb) {
          const assertContentType = 'test/test'
          const assertContentLength = 1241241
          const assertHandle = stub().returnWith(function(checkCtx, secondary) {
            assert.notOk(secondary)
            assert.strictEqual(checkCtx, ctx)
            assert.notOk(ctx.res.writeHead.called)
            ctx.type = assertContentType
            ctx.headers['Content-Length'] = assertContentLength
            return null
          })

          let body = new FileResponse()
          let onFinish = cb.finish(function(body) {
            assert.ok(assertHandle.called)
            assert.ok(ctx.res.writeHead)
            assert.strictEqual(ctx.body, null)
            assert.notOk(body)
            assert.ok(ctx.res.writeHead.called)
            assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
            assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
            assert.strictEqual(ctx.headers['Content-Type'], assertContentType)
            assert.strictEqual(ctx.headers['Content-Length'], assertContentLength)
          })

          const ctx = createCtx({
            method: method,
          }, onFinish)
          ctx.body = body
          body.handleRequest = assertHandle
      
          let flaska = new Flaska({}, fakerHttp, fakeStream)

          try {
            flaska.requestEnd(null, ctx)
          } catch (err) {
            cb(err)
          }
        })

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

          let onFinish = cb.finish(function(body) {
            assert.strictEqual(ctx.status, assertStatus)
            assert.strictEqual(ctx.headers['Content-Type'], assertType)
            assert.notOk(ctx.headers['Content-Length'])
            assert.notOk(body)
            
            assert.ok(assertBody.destroy.called)
            assert.ok(ctx.res.writeHead.called)
            assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
            assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
          })
          const ctx = createCtx({
            method: method,
            status: assertStatus,
          }, onFinish)

          ctx.body = assertBody
          ctx.type = assertType
          let flaska = new Flaska({}, fakerHttp, fakeStream)
          flaska.requestEnd(null, ctx)
        })
      }
    })
  })
  
  t.test('call _onerror with error if handleRequest throws error', function() {
    let body = new FileResponse()
    const assertError = new Error('Secrets of the Goddess')
    let assertBody = { a : 1 }
    const ctx = createCtx({
      status: 204,
    })
    ctx.body = body
    const assertHandle = stub().throws(assertError)
    body.handleRequest = assertHandle

    let flaska = new Flaska({}, fakerHttp, fakeStream)
    flaska._onerror = stub().returnWith(function(err, checkCtx) {
      assert.strictEqual(err, assertError)
      checkCtx.body = assertBody
    })
    flaska.requestEnd(null, ctx)
    assert.ok(assertHandle.called)
    assert.ok(flaska._onerror.called)
    assert.strictEqual(flaska._onerror.firstCall[0], assertError)
    assert.ok(ctx.res.writeHead)
    assert.strictEqual(ctx.body, assertBody)
  })

  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 = cb.finish(function(body) {
      assert.strictEqual(ctx.status, assertStatus)
      assert.strictEqual(ctx.headers['Content-Type'], assertType)
      assert.strictEqual(body, assertBody)
      assert.ok(ctx.res.writeHead.called)
      assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
      assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
    })
    const ctx = createCtx({
      status: assertStatus,
      body: assertBody,
    }, onFinish)
    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 = cb.finish(function(source, target) {
      assert.strictEqual(ctx.status, 200)
      assert.strictEqual(ctx.headers['Content-Type'], 'application/octet-stream')
      assert.strictEqual(source, ctx.body)
      assert.strictEqual(target, ctx.res)
      assert.ok(ctx.res.writeHead.called)
      assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
      assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
    })
    const ctx = createCtx({})
    ctx.body = { pipe: function() {} }
    fakeStream.pipeline = onFinish

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

  let tests = [
    ['png', 'image/png'],
    ['jpg', 'image/jpeg'],
    ['bmp', 'image/bmp'],
    ['js', 'text/javascript'],
  ]

  tests.forEach(function(test) {
    t.test(`call pipe with file extension ${test[0]} should mimetype ${test[1]}`, function(cb) {
      let onFinish = cb.finish(function(source, target) {
        assert.strictEqual(ctx.status, 200)
        assert.strictEqual(ctx.headers['Content-Type'], test[1])
        assert.strictEqual(source, ctx.body)
        assert.strictEqual(target, ctx.res)
        assert.ok(ctx.res.writeHead.called)
        assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
        assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
      })
      const ctx = createCtx({})
      ctx.body = { pipe: function() {}, path: './bla/test/temp.' + test[0] }
      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 = cb.finish(function(body) {
        assert.strictEqual(ctx.status, assertStatus)
        assert.strictEqual(ctx.res.setHeader.callCount, 0)
        assert.ok(ctx.res.writeHead.called)
        assert.strictEqual(ctx.res.writeHead.firstCall[0], ctx.status)
        assert.strictEqual(ctx.res.writeHead.firstCall[1], ctx.headers)
        assert.notOk(body)
      })
      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 destroy if body is pipe and is not closed', function() {
    const ctx = createCtx({
      body: {
        pipe: {},
        closed: false,
        destroy: spy(),
      },
    })
    let flaska = new Flaska({}, fakerHttp)
    flaska._afterCompiled = function() {}

    flaska.requestEnded(ctx)

    assert.ok(ctx.body.destroy.called)
  })

  t.test('not call destroy if body is pipe but is closed', function() {
    const ctx = createCtx({
      body: {
        pipe: {},
        closed: true,
        destroy: spy(),
      }
    })
    let flaska = new Flaska({}, fakerHttp)
    flaska._afterCompiled = function() {}

    flaska.requestEnded(ctx)

    assert.notOk(ctx.body.destroy.called)
  })

  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)
  })
})