package web

import (
	"bytes"
	"fmt"
	"io"
	"mime/multipart"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
)

func init() {
	gin.SetMode(gin.TestMode)
}

func Test_parse(t *testing.T) {
	tests := []struct {
		name           string
		body           [][]byte
		expectedStatus int
		expectedReply  string
	}{
		{name: "No files uploaded",
			body:           [][]byte{},
			expectedStatus: 200,
			expectedReply:  `[]`,
		},
		{name: "1 file uploaded and succeeds",
			body:           [][]byte{{0x7b, 0x03, 0x17, 0x81, 0x00, 0x00, 0xdd, 0x01, 0x14, 0x00, 0x00, 0x00, 0x6d, 0xaa, 0x32, 0x44, 0x40, 0x1f, 0x00, 0x00, 0x2f, 0x04, 0x00, 0x00, 0x43, 0x56, 0x88, 0x03, 0x12, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x52, 0x00, 0x61, 0x00, 0x74, 0x00, 0x69, 0x00, 0x63, 0x00, 0x61, 0x00, 0x74, 0x00, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa4, 0x00, 0x75, 0x01, 0x53, 0x01, 0x9e, 0x00, 0x0a, 0x0f, 0x14, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0xfc, 0xff, 0x17, 0x50, 0x00, 0x50, 0x00, 0x6f, 0x00, 0x72, 0x00, 0x67, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x00, 0x50, 0x00, 0x6f, 0x00, 0x72, 0x00, 0x67, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x0b, 0x12, 0x00, 0x00, 0x00, 0xca, 0x00, 0x04, 0x14, 0x00, 0x21, 0x01, 0x02, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00}},
			expectedStatus: 200,
			expectedReply:  "[{\"pokedex_number\":20,\"raw_nickname\":\"UgBhAHQAaQBjAGEAdABlAAAAAAAAAAAA\",\"nickname\":\"Raticate\",\"raw_pokemon\":\"ewMXgQAA3QEUAAAAbaoyREAfAAAvBAAAQ1aIAxISAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFIAYQB0AGkAYwBhAHQAZQAAAAAAAAAAAAAApAB1AVMBngAKDxQPAAAAAAAAAAAAAAAAAAA8/P8XUABQAG8AcgBnAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAARgAAAAAAAAAAAAAAAABQAFAAbwByAGcAAAAAAAAAAAAAAAAAAAAAAEYAAAAAAAAAAAARCxIAAADKAAQUACEBAgACAAAAAA==\"}]",
		},
		{name: "1 file uploaded and fails",
			body:           [][]byte{{0x7b}},
			expectedStatus: 422,
			expectedReply:  "{\"error\":\"Invalid length for generation 7 pokemon: 1 bytes\"}",
		},
		{name: "Multiple files uploaded and succeed",
			body: [][]byte{
				{0x7b, 0x03, 0x17, 0x81, 0x00, 0x00, 0xdd, 0x01, 0x14, 0x00, 0x00, 0x00, 0x6d, 0xaa, 0x32, 0x44, 0x40, 0x1f, 0x00, 0x00, 0x2f, 0x04, 0x00, 0x00, 0x43, 0x56, 0x88, 0x03, 0x12, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x52, 0x00, 0x61, 0x00, 0x74, 0x00, 0x69, 0x00, 0x63, 0x00, 0x61, 0x00, 0x74, 0x00, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa4, 0x00, 0x75, 0x01, 0x53, 0x01, 0x9e, 0x00, 0x0a, 0x0f, 0x14, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0xfc, 0xff, 0x17, 0x50, 0x00, 0x50, 0x00, 0x6f, 0x00, 0x72, 0x00, 0x67, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x00, 0x50, 0x00, 0x6f, 0x00, 0x72, 0x00, 0x67, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x0b, 0x12, 0x00, 0x00, 0x00, 0xca, 0x00, 0x04, 0x14, 0x00, 0x21, 0x01, 0x02, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00},
				{0x7b, 0x03, 0x17, 0x81, 0x00, 0x00, 0xdd, 0x01, 0x14, 0x00, 0x00, 0x00, 0x6d, 0xaa, 0x32, 0x44, 0x40, 0x1f, 0x00, 0x00, 0x2f, 0x04, 0x00, 0x00, 0x43, 0x56, 0x88, 0x03, 0x12, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x52, 0x00, 0x61, 0x00, 0x74, 0x00, 0x69, 0x00, 0x63, 0x00, 0x61, 0x00, 0x74, 0x00, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa4, 0x00, 0x75, 0x01, 0x53, 0x01, 0x9e, 0x00, 0x0a, 0x0f, 0x14, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0xfc, 0xff, 0x17, 0x50, 0x00, 0x50, 0x00, 0x6f, 0x00, 0x72, 0x00, 0x67, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x00, 0x50, 0x00, 0x6f, 0x00, 0x72, 0x00, 0x67, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x0b, 0x12, 0x00, 0x00, 0x00, 0xca, 0x00, 0x04, 0x14, 0x00, 0x21, 0x01, 0x02, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00},
			},
			expectedStatus: 200,
			expectedReply:  "[{\"pokedex_number\":20,\"raw_nickname\":\"UgBhAHQAaQBjAGEAdABlAAAAAAAAAAAA\",\"nickname\":\"Raticate\",\"raw_pokemon\":\"ewMXgQAA3QEUAAAAbaoyREAfAAAvBAAAQ1aIAxISAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFIAYQB0AGkAYwBhAHQAZQAAAAAAAAAAAAAApAB1AVMBngAKDxQPAAAAAAAAAAAAAAAAAAA8/P8XUABQAG8AcgBnAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAARgAAAAAAAAAAAAAAAABQAFAAbwByAGcAAAAAAAAAAAAAAAAAAAAAAEYAAAAAAAAAAAARCxIAAADKAAQUACEBAgACAAAAAA==\"},{\"pokedex_number\":20,\"raw_nickname\":\"UgBhAHQAaQBjAGEAdABmAAAAAAAAAAAA\",\"nickname\":\"Raticatf\",\"raw_pokemon\":\"ewMXgQAA3QEUAAAAbaoyREAfAAAvBAAAQ1aIAxISAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFIAYQB0AGkAYwBhAHQAZgAAAAAAAAAAAAAApAB1AVMBngAKDxQPAAAAAAAAAAAAAAAAAAA8/P8XUABQAG8AcgBnAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAARgAAAAAAAAAAAAAAAABQAFAAbwByAGcAAAAAAAAAAAAAAAAAAAAAAEYAAAAAAAAAAAARCxIAAADKAAQUACEBAgACAAAAAA==\"}]",
		},
		{name: "Multiple files uploaded and fail",
			body: [][]byte{
				{0x7b, 0x03, 0x17, 0x81, 0x00, 0x00, 0xdd, 0x01, 0x14, 0x00, 0x00, 0x00, 0x6d, 0xaa, 0x32, 0x44, 0x40, 0x1f, 0x00, 0x00, 0x2f, 0x04, 0x00, 0x00, 0x43, 0x56, 0x88, 0x03, 0x12, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x52, 0x00, 0x61, 0x00, 0x74, 0x00, 0x69, 0x00, 0x63, 0x00, 0x61, 0x00, 0x74, 0x00, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa4, 0x00, 0x75, 0x01, 0x53, 0x01, 0x9e, 0x00, 0x0a, 0x0f, 0x14, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0xfc, 0xff, 0x17, 0x50, 0x00, 0x50, 0x00, 0x6f, 0x00, 0x72, 0x00, 0x67, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x00, 0x50, 0x00, 0x6f, 0x00, 0x72, 0x00, 0x67, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x0b, 0x12, 0x00, 0x00, 0x00, 0xca, 0x00, 0x04, 0x14, 0x00, 0x21, 0x01, 0x02, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00},
				{0x7b, 0x03},
			},
			expectedStatus: 422,
			expectedReply:  "{\"error\":\"Invalid length for generation 7 pokemon: 2 bytes\"}",
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			s := &Server{}

			rec := httptest.NewRecorder()
			ctx, _ := gin.CreateTestContext(rec)

			var b bytes.Buffer
			var err error
			var fw io.Writer

			w := multipart.NewWriter(&b)

			for i, postBody := range tt.body {
				if fw, err = w.CreateFormFile("pokemon", fmt.Sprintf("test%d.pk7", i+1)); err != nil {
					assert.Fail(t, "Failed to create form file: %s", err)
					return
				}
				body := bytes.NewBuffer(postBody)
				if _, err = io.Copy(fw, body); err != nil {
					assert.Fail(t, "Failed to copy buffer: %s", err)
					return
				}
			}

			w.Close()

			var req *http.Request
			if req, err = http.NewRequest(http.MethodPost, "/parse", &b); err != nil {
				assert.Fail(t, "Failed to create request: %s", err)
				return
			}
			req.Header.Set("Content-Type", w.FormDataContentType())
			ctx.Request = req

			s.parse(ctx)
			assert.Equal(t, tt.expectedReply, rec.Body.String())
			assert.Equal(t, tt.expectedStatus, ctx.Writer.Status())
		})
	}
}

//    //prepare the reader instances to encode
//    values := map[string]io.Reader{
//        "file":  mustOpen("main.go"), // lets assume its this file
//        "other": strings.NewReader("hello world!"),
//    }
//    err := Upload(client, remoteURL, values)
//    if err != nil {
//        panic(err)
//    }
//}

//func Upload(client *http.Client, url string, values map[string]io.Reader) (err error) {
//    // Prepare a form that you will submit to that URL.
//    var b bytes.Buffer
//    w := multipart.NewWriter(&b)
//    for key, r := range values {
//        var fw io.Writer
//        if x, ok := r.(io.Closer); ok {
//            defer x.Close()
//        }
//        // Add an image file
//        if x, ok := r.(*os.File); ok {
//            if fw, err = w.CreateFormFile(key, x.Name()); err != nil {
//                return
//            }
//        } else {
//            // Add other fields
//            if fw, err = w.CreateFormField(key); err != nil {
//                return
//            }
//        }
//        if _, err = io.Copy(fw, r); err != nil {
//            return err
//        }
//    }
//    // Don't forget to close the multipart writer.
//    // If you don't close it, your request will be missing the terminating boundary.
//    w.Close()
//    // Now that you have a form, you can submit it to your handler.
//    req, err := http.NewRequest("POST", url, &b)