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

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

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

	// 測試數據
	getCommentsReq := &tweeting.GetCommentsReq{
		PostId:    "12345",
		PageSize:  10,
		PageIndex: 1,
	}

	mockComments := []*model.Comment{
		{
			ID:           primitive.NewObjectID(),
			PostID:       "12345",
			UID:          "54321",
			Content:      "This is a comment",
			LikeCount:    10,
			DisLikeCount: 2,
		},
		{
			ID:           primitive.NewObjectID(),
			PostID:       "12345",
			UID:          "67890",
			Content:      "This is another comment",
			LikeCount:    5,
			DisLikeCount: 1,
		},
	}

	// 測試數據集
	tests := []struct {
		name      string
		input     *tweeting.GetCommentsReq
		prepare   func()
		expectErr bool
	}{
		{
			name:  "成功查詢評論",
			input: getCommentsReq,
			prepare: func() {
				mockValidate.EXPECT().ValidateAll(gomock.Any()).Return(nil).Times(1)
				mockCommentModel.EXPECT().Find(gomock.Any(), gomock.Any()).Return(mockComments, int64(len(mockComments)), nil).Times(1)
			},
			expectErr: false,
		},
		{
			name:  "查詢評論失敗",
			input: getCommentsReq,
			prepare: func() {
				mockValidate.EXPECT().ValidateAll(gomock.Any()).Return(nil).Times(1)
				mockCommentModel.EXPECT().Find(gomock.Any(), gomock.Any()).Return(nil, int64(0), errors.New("find failed")).Times(1)
			},
			expectErr: true,
		},
		{
			name:  "驗證失敗",
			input: getCommentsReq,
			prepare: func() {
				mockValidate.EXPECT().ValidateAll(gomock.Any()).Return(errors.New("validation 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 GetCommentsLogic
			logic := GetCommentsLogic{
				svcCtx: svcCtx,
				ctx:    context.TODO(),
			}

			// 執行 GetComments
			resp, err := logic.GetComments(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.Len(t, resp.Comments, len(mockComments))
			}
		})
	}
}