package commentservicelogic

import (
	"app-cloudep-tweeting-service/gen_result/pb/tweeting"
	model "app-cloudep-tweeting-service/internal/model/mongo"
	"app-cloudep-tweeting-service/internal/svc"
	"context"
	"errors"
	"testing"

	"github.com/stretchr/testify/assert"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.uber.org/mock/gomock"

	mocklib "app-cloudep-tweeting-service/internal/mock/lib"
	mockmodel "app-cloudep-tweeting-service/internal/mock/model"
)

func TestNewComment(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()

	// 初始化 mock 依賴
	mockPostModel := mockmodel.NewMockPostModel(ctrl)
	mockCommentModel := mockmodel.NewMockCommentModel(ctrl)
	mockValidate := mocklib.NewMockValidate(ctrl)

	// 初始化服務上下文
	svcCtx := &svc.ServiceContext{
		PostModel:    mockPostModel,
		CommentModel: mockCommentModel,
		Validate:     mockValidate,
	}

	// 測試數據
	postID := primitive.NewObjectID().Hex()
	commentReq := &tweeting.CommentPostReq{
		Uid:     "12345",
		Content: "This is a comment",
		PostId:  postID,
	}

	// 測試數據集
	tests := []struct {
		name      string
		input     *tweeting.CommentPostReq
		prepare   func()
		expectErr bool
	}{
		{
			name:  "成功發表評論",
			input: commentReq,
			prepare: func() {
				// 模擬 Validate 成功
				mockValidate.EXPECT().ValidateAll(gomock.Any()).Return(nil).Times(1)
				// 模擬 FindOne 成功找到文章
				mockPostModel.EXPECT().FindOne(gomock.Any(), postID).Return(&model.Post{}, nil).Times(1)
				// 模擬 Insert 成功
				mockCommentModel.EXPECT().Insert(gomock.Any(), gomock.Any()).Return(nil).Times(1)
			},
			expectErr: false,
		},
		{
			name:  "驗證失敗",
			input: commentReq,
			prepare: func() {
				// 模擬 Validate 失敗
				mockValidate.EXPECT().ValidateAll(gomock.Any()).Return(errors.New("validation failed")).Times(1)
			},
			expectErr: true,
		},
		{
			name:  "文章不存在",
			input: commentReq,
			prepare: func() {
				// 模擬 Validate 成功
				mockValidate.EXPECT().ValidateAll(gomock.Any()).Return(nil).Times(1)
				// 模擬 FindOne 找不到文章
				mockPostModel.EXPECT().FindOne(gomock.Any(), postID).Return(nil, model.ErrNotFound).Times(1)
			},
			expectErr: true,
		},
		{
			name:  "插入評論失敗",
			input: commentReq,
			prepare: func() {
				// 模擬 Validate 成功
				mockValidate.EXPECT().ValidateAll(gomock.Any()).Return(nil).Times(1)
				// 模擬 FindOne 成功找到文章
				mockPostModel.EXPECT().FindOne(gomock.Any(), postID).Return(&model.Post{}, nil).Times(1)
				// 模擬 Insert 失敗
				mockCommentModel.EXPECT().Insert(gomock.Any(), gomock.Any()).Return(errors.New("insert failed")).Times(1)
			},
			expectErr: true,
		},
	}

	// 執行測試
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			// 設置測試環境
			tt.prepare()

			// 初始化 NewCommentLogic
			logic := NewCommentLogic{
				svcCtx: svcCtx,
				ctx:    context.TODO(),
			}

			// 執行 NewComment
			resp, err := logic.NewComment(tt.input)

			// 驗證結果
			if tt.expectErr {
				assert.Error(t, err)
				assert.Nil(t, resp)
			} else {
				assert.NoError(t, err)
				assert.NotNil(t, resp)
				assert.NotEmpty(t, resp.CommentId)
			}
		})
	}
}