// Copyright 2020 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package lfs

import (
	"bytes"
	"io/ioutil"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/stretchr/testify/assert"
	"gopkg.in/macaron.v1"

	"gogs.io/gogs/internal/conf"
	"gogs.io/gogs/internal/db"
	"gogs.io/gogs/internal/lfsutil"
)

func Test_serveBatch(t *testing.T) {
	conf.SetMockServer(t, conf.ServerOpts{
		ExternalURL: "https://gogs.example.com/",
	})
	m := macaron.New()
	m.Use(func(c *macaron.Context) {
		c.Map(&db.User{Name: "owner"})
		c.Map(&db.Repository{Name: "repo"})
	})
	m.Post("/", serveBatch)

	tests := []struct {
		name          string
		body          string
		mockLFSStore  *db.MockLFSStore
		expStatusCode int
		expBody       string
	}{
		{
			name:          "unrecognized operation",
			body:          `{"operation": "update"}`,
			expStatusCode: http.StatusBadRequest,
			expBody:       `{"message":"Operation not recognized"}` + "\n",
		},
		{
			name: "upload: contains invalid oid",
			body: `{
"operation": "upload",
"objects": [
	{"oid": "bad_oid", "size": 123},
	{"oid": "ef797c8118f02dfb649607dd5d3f8c7623048c9c063d532cc95c5ed7a898a64f", "size": 123}
]}`,
			expStatusCode: http.StatusOK,
			expBody:       `{"transfer":"basic","objects":[{"oid":"bad_oid","size":123,"actions":{"error":{"code":422,"message":"Object has invalid oid"}}},{"oid":"ef797c8118f02dfb649607dd5d3f8c7623048c9c063d532cc95c5ed7a898a64f","size":123,"actions":{"upload":{"href":"https://gogs.example.com/owner/repo.git/info/lfs/objects/basic/ef797c8118f02dfb649607dd5d3f8c7623048c9c063d532cc95c5ed7a898a64f"},"verify":{"href":"https://gogs.example.com/owner/repo.git/info/lfs/objects/basic/verify"}}}]}` + "\n",
		},
		{
			name: "download: contains non-existent oid and mismatched size",
			body: `{
"operation": "download",
"objects": [
	{"oid": "bad_oid", "size": 123},
	{"oid": "ef797c8118f02dfb649607dd5d3f8c7623048c9c063d532cc95c5ed7a898a64f", "size": 123},
	{"oid": "5cac0a318669fadfee734fb340a5f5b70b428ac57a9f4b109cb6e150b2ba7e57", "size": 456}
]}`,
			mockLFSStore: &db.MockLFSStore{
				MockGetObjectsByOIDs: func(repoID int64, oids ...lfsutil.OID) ([]*db.LFSObject, error) {
					return []*db.LFSObject{
						{
							OID:  "ef797c8118f02dfb649607dd5d3f8c7623048c9c063d532cc95c5ed7a898a64f",
							Size: 1234,
						}, {
							OID:  "5cac0a318669fadfee734fb340a5f5b70b428ac57a9f4b109cb6e150b2ba7e57",
							Size: 456,
						},
					}, nil
				},
			},
			expStatusCode: http.StatusOK,
			expBody:       `{"transfer":"basic","objects":[{"oid":"bad_oid","size":123,"actions":{"error":{"code":404,"message":"Object does not exist"}}},{"oid":"ef797c8118f02dfb649607dd5d3f8c7623048c9c063d532cc95c5ed7a898a64f","size":123,"actions":{"error":{"code":422,"message":"Object size mismatch"}}},{"oid":"5cac0a318669fadfee734fb340a5f5b70b428ac57a9f4b109cb6e150b2ba7e57","size":456,"actions":{"download":{"href":"https://gogs.example.com/owner/repo.git/info/lfs/objects/basic/5cac0a318669fadfee734fb340a5f5b70b428ac57a9f4b109cb6e150b2ba7e57"}}}]}` + "\n",
		},
	}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			db.SetMockLFSStore(t, test.mockLFSStore)

			r, err := http.NewRequest("POST", "/", bytes.NewBufferString(test.body))
			if err != nil {
				t.Fatal(err)
			}

			rr := httptest.NewRecorder()
			m.ServeHTTP(rr, r)

			resp := rr.Result()
			assert.Equal(t, test.expStatusCode, resp.StatusCode)

			body, err := ioutil.ReadAll(resp.Body)
			if err != nil {
				t.Fatal(err)
			}
			assert.Equal(t, test.expBody, string(body))
		})
	}
}