package handler

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"
	"tss-rocks-be/ent"
	"tss-rocks-be/internal/config"
	"tss-rocks-be/internal/service"
	"tss-rocks-be/internal/service/mock"

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/suite"
	"go.uber.org/mock/gomock"

	"errors"
	"strings"
)

type DailyHandlerTestSuite struct {
	suite.Suite
	ctrl    *gomock.Controller
	service *mock.MockService
	handler *Handler
	router  *gin.Engine
}

func (s *DailyHandlerTestSuite) SetupTest() {
	s.ctrl = gomock.NewController(s.T())
	s.service = mock.NewMockService(s.ctrl)
	cfg := &config.Config{
		JWT: config.JWTConfig{
			Secret: "test-secret",
		},
	}
	s.handler = NewHandler(cfg, s.service)

	// Setup Gin router
	gin.SetMode(gin.TestMode)
	s.router = gin.New()

	// Setup mock for GetTokenBlacklist
	tokenBlacklist := &service.TokenBlacklist{}
	s.service.EXPECT().
		GetTokenBlacklist().
		Return(tokenBlacklist).
		AnyTimes()

	s.handler.RegisterRoutes(s.router)
}

func (s *DailyHandlerTestSuite) TearDownTest() {
	s.ctrl.Finish()
}

func TestDailyHandlerSuite(t *testing.T) {
	suite.Run(t, new(DailyHandlerTestSuite))
}

func (s *DailyHandlerTestSuite) TestListDailies() {
	testCases := []struct {
		name           string
		langCode       string
		categoryID     string
		limit          string
		offset         string
		setupMock      func()
		expectedStatus int
		expectedBody   interface{}
	}{
		{
			name:     "Success with default language",
			langCode: "",
			setupMock: func() {
				s.service.EXPECT().
					ListDailies(gomock.Any(), "en", nil, 10, 0).
					Return([]*ent.Daily{
						{
							ID:       "daily1",
							ImageURL: "https://example.com/image1.jpg",
							Edges: ent.DailyEdges{
								Category: &ent.Category{ID: 1},
								Contents: []*ent.DailyContent{
									{
										LanguageCode: "en",
										Quote:        "Test Quote 1",
									},
								},
							},
						},
					}, nil)
			},
			expectedStatus: http.StatusOK,
			expectedBody: []*ent.Daily{
				{
					ID:       "daily1",
					ImageURL: "https://example.com/image1.jpg",
					Edges: ent.DailyEdges{
						Category: &ent.Category{ID: 1},
						Contents: []*ent.DailyContent{
							{
								LanguageCode: "en",
								Quote:        "Test Quote 1",
							},
						},
					},
				},
			},
		},
		{
			name:     "Success with specific language",
			langCode: "zh",
			setupMock: func() {
				s.service.EXPECT().
					ListDailies(gomock.Any(), "zh", nil, 10, 0).
					Return([]*ent.Daily{
						{
							ID:       "daily1",
							ImageURL: "https://example.com/image1.jpg",
							Edges: ent.DailyEdges{
								Category: &ent.Category{ID: 1},
								Contents: []*ent.DailyContent{
									{
										LanguageCode: "zh",
										Quote:        "测试语录1",
									},
								},
							},
						},
					}, nil)
			},
			expectedStatus: http.StatusOK,
			expectedBody: []*ent.Daily{
				{
					ID:       "daily1",
					ImageURL: "https://example.com/image1.jpg",
					Edges: ent.DailyEdges{
						Category: &ent.Category{ID: 1},
						Contents: []*ent.DailyContent{
							{
								LanguageCode: "zh",
								Quote:        "测试语录1",
							},
						},
					},
				},
			},
		},
		{
			name:       "Success with category filter",
			categoryID: "1",
			setupMock: func() {
				categoryID := 1
				s.service.EXPECT().
					ListDailies(gomock.Any(), "en", &categoryID, 10, 0).
					Return([]*ent.Daily{
						{
							ID:       "daily1",
							ImageURL: "https://example.com/image1.jpg",
							Edges: ent.DailyEdges{
								Category: &ent.Category{ID: 1},
								Contents: []*ent.DailyContent{
									{
										LanguageCode: "en",
										Quote:        "Test Quote 1",
									},
								},
							},
						},
					}, nil)
			},
			expectedStatus: http.StatusOK,
			expectedBody: []*ent.Daily{
				{
					ID:       "daily1",
					ImageURL: "https://example.com/image1.jpg",
					Edges: ent.DailyEdges{
						Category: &ent.Category{ID: 1},
						Contents: []*ent.DailyContent{
							{
								LanguageCode: "en",
								Quote:        "Test Quote 1",
							},
						},
					},
				},
			},
		},
		{
			name:   "Success with pagination",
			limit:  "2",
			offset: "1",
			setupMock: func() {
				s.service.EXPECT().
					ListDailies(gomock.Any(), "en", nil, 2, 1).
					Return([]*ent.Daily{
						{
							ID:       "daily2",
							ImageURL: "https://example.com/image2.jpg",
							Edges: ent.DailyEdges{
								Category: &ent.Category{ID: 1},
								Contents: []*ent.DailyContent{
									{
										LanguageCode: "en",
										Quote:        "Test Quote 2",
									},
								},
							},
						},
					}, nil)
			},
			expectedStatus: http.StatusOK,
			expectedBody: []*ent.Daily{
				{
					ID:       "daily2",
					ImageURL: "https://example.com/image2.jpg",
					Edges: ent.DailyEdges{
						Category: &ent.Category{ID: 1},
						Contents: []*ent.DailyContent{
							{
								LanguageCode: "en",
								Quote:        "Test Quote 2",
							},
						},
					},
				},
			},
		},
		{
			name: "Service Error",
			setupMock: func() {
				s.service.EXPECT().
					ListDailies(gomock.Any(), "en", nil, 10, 0).
					Return(nil, errors.New("service error"))
			},
			expectedStatus: http.StatusInternalServerError,
			expectedBody:   gin.H{"error": "Failed to list dailies"},
		},
	}

	for _, tc := range testCases {
		s.Run(tc.name, func() {
			tc.setupMock()

			url := "/api/v1/dailies"
			if tc.langCode != "" {
				url += "?lang=" + tc.langCode
			}
			if tc.categoryID != "" {
				if strings.Contains(url, "?") {
					url += "&"
				} else {
					url += "?"
				}
				url += "category_id=" + tc.categoryID
			}
			if tc.limit != "" {
				if strings.Contains(url, "?") {
					url += "&"
				} else {
					url += "?"
				}
				url += "limit=" + tc.limit
			}
			if tc.offset != "" {
				if strings.Contains(url, "?") {
					url += "&"
				} else {
					url += "?"
				}
				url += "offset=" + tc.offset
			}

			req := httptest.NewRequest(http.MethodGet, url, nil)
			w := httptest.NewRecorder()
			s.router.ServeHTTP(w, req)

			s.Equal(tc.expectedStatus, w.Code, "HTTP status code mismatch")

			if tc.expectedBody != nil {
				expectedJSON, err := json.Marshal(tc.expectedBody)
				s.NoError(err, "Failed to marshal expected body")
				s.JSONEq(string(expectedJSON), w.Body.String(), "Response body mismatch")
			}
		})
	}
}

func (s *DailyHandlerTestSuite) TestGetDaily() {
	testCases := []struct {
		name           string
		id             string
		setupMock      func()
		expectedStatus int
		expectedBody   interface{}
	}{
		{
			name: "Success",
			id:   "daily1",
			setupMock: func() {
				s.service.EXPECT().
					GetDailyByID(gomock.Any(), "daily1").
					Return(&ent.Daily{
						ID:       "daily1",
						ImageURL: "https://example.com/image1.jpg",
						Edges: ent.DailyEdges{
							Category: &ent.Category{ID: 1},
							Contents: []*ent.DailyContent{
								{
									LanguageCode: "en",
									Quote:        "Test Quote 1",
								},
							},
						},
					}, nil)
			},
			expectedStatus: http.StatusOK,
			expectedBody: &ent.Daily{
				ID:       "daily1",
				ImageURL: "https://example.com/image1.jpg",
				Edges: ent.DailyEdges{
					Category: &ent.Category{ID: 1},
					Contents: []*ent.DailyContent{
						{
							LanguageCode: "en",
							Quote:        "Test Quote 1",
						},
					},
				},
			},
		},
		{
			name: "Service error",
			id:   "daily1",
			setupMock: func() {
				s.service.EXPECT().
					GetDailyByID(gomock.Any(), "daily1").
					Return(nil, errors.New("service error"))
			},
			expectedStatus: http.StatusInternalServerError,
			expectedBody:   gin.H{"error": "Failed to get daily"},
		},
	}

	for _, tc := range testCases {
		s.Run(tc.name, func() {
			tc.setupMock()

			req := httptest.NewRequest(http.MethodGet, "/api/v1/dailies/"+tc.id, nil)
			w := httptest.NewRecorder()
			s.router.ServeHTTP(w, req)

			s.Equal(tc.expectedStatus, w.Code, "HTTP status code mismatch")

			if tc.expectedBody != nil {
				expectedJSON, err := json.Marshal(tc.expectedBody)
				s.NoError(err, "Failed to marshal expected body")
				s.JSONEq(string(expectedJSON), w.Body.String(), "Response body mismatch")
			}
		})
	}
}

func (s *DailyHandlerTestSuite) TestCreateDaily() {
	testCases := []struct {
		name           string
		body           interface{}
		setupMock      func()
		expectedStatus int
		expectedBody   interface{}
	}{
		{
			name: "Success",
			body: CreateDailyRequest{
				ID:         "daily1",
				CategoryID: 1,
				ImageURL:   "https://example.com/image1.jpg",
			},
			setupMock: func() {
				s.service.EXPECT().
					CreateDaily(gomock.Any(), "daily1", 1, "https://example.com/image1.jpg").
					Return(&ent.Daily{
						ID:       "daily1",
						ImageURL: "https://example.com/image1.jpg",
						Edges: ent.DailyEdges{
							Category: &ent.Category{ID: 1},
							Contents: []*ent.DailyContent{},
						},
					}, nil)
			},
			expectedStatus: http.StatusCreated,
			expectedBody: &ent.Daily{
				ID:       "daily1",
				ImageURL: "https://example.com/image1.jpg",
				Edges: ent.DailyEdges{
					Category: &ent.Category{ID: 1},
					Contents: []*ent.DailyContent{},
				},
			},
		},
		{
			name: "Invalid request body",
			body: map[string]interface{}{
				"id": "daily1",
				// Missing required fields
			},
			setupMock:      func() {},
			expectedStatus: http.StatusBadRequest,
			expectedBody:   gin.H{"error": "Key: 'CreateDailyRequest.CategoryID' Error:Field validation for 'CategoryID' failed on the 'required' tag\nKey: 'CreateDailyRequest.ImageURL' Error:Field validation for 'ImageURL' failed on the 'required' tag"},
		},
		{
			name: "Service error",
			body: CreateDailyRequest{
				ID:         "daily1",
				CategoryID: 1,
				ImageURL:   "https://example.com/image1.jpg",
			},
			setupMock: func() {
				s.service.EXPECT().
					CreateDaily(gomock.Any(), "daily1", 1, "https://example.com/image1.jpg").
					Return(nil, errors.New("service error"))
			},
			expectedStatus: http.StatusInternalServerError,
			expectedBody:   gin.H{"error": "Failed to create daily"},
		},
	}

	for _, tc := range testCases {
		s.Run(tc.name, func() {
			tc.setupMock()

			body, err := json.Marshal(tc.body)
			s.NoError(err, "Failed to marshal request body")

			req := httptest.NewRequest(http.MethodPost, "/api/v1/dailies", bytes.NewReader(body))
			req.Header.Set("Content-Type", "application/json")
			w := httptest.NewRecorder()
			s.router.ServeHTTP(w, req)

			s.Equal(tc.expectedStatus, w.Code, "HTTP status code mismatch")

			if tc.expectedBody != nil {
				expectedJSON, err := json.Marshal(tc.expectedBody)
				s.NoError(err, "Failed to marshal expected body")
				s.JSONEq(string(expectedJSON), w.Body.String(), "Response body mismatch")
			}
		})
	}
}

func (s *DailyHandlerTestSuite) TestAddDailyContent() {
	testCases := []struct {
		name           string
		dailyID        string
		body           interface{}
		setupMock      func()
		expectedStatus int
		expectedBody   interface{}
	}{
		{
			name:    "Success",
			dailyID: "daily1",
			body: AddDailyContentRequest{
				LanguageCode: "en",
				Quote:        "Test Quote 1",
			},
			setupMock: func() {
				s.service.EXPECT().
					AddDailyContent(gomock.Any(), "daily1", "en", "Test Quote 1").
					Return(&ent.DailyContent{
						LanguageCode: "en",
						Quote:        "Test Quote 1",
					}, nil)
			},
			expectedStatus: http.StatusCreated,
			expectedBody: &ent.DailyContent{
				LanguageCode: "en",
				Quote:        "Test Quote 1",
			},
		},
		{
			name:    "Invalid request body",
			dailyID: "daily1",
			body: map[string]interface{}{
				"language_code": "en",
				// Missing required fields
			},
			setupMock:      func() {},
			expectedStatus: http.StatusBadRequest,
			expectedBody:   gin.H{"error": "Key: 'AddDailyContentRequest.Quote' Error:Field validation for 'Quote' failed on the 'required' tag"},
		},
		{
			name:    "Service error",
			dailyID: "daily1",
			body: AddDailyContentRequest{
				LanguageCode: "en",
				Quote:        "Test Quote 1",
			},
			setupMock: func() {
				s.service.EXPECT().
					AddDailyContent(gomock.Any(), "daily1", "en", "Test Quote 1").
					Return(nil, errors.New("service error"))
			},
			expectedStatus: http.StatusInternalServerError,
			expectedBody:   gin.H{"error": "Failed to add daily content"},
		},
	}

	for _, tc := range testCases {
		s.Run(tc.name, func() {
			tc.setupMock()

			body, err := json.Marshal(tc.body)
			s.NoError(err, "Failed to marshal request body")

			req := httptest.NewRequest(http.MethodPost, "/api/v1/dailies/"+tc.dailyID+"/contents", bytes.NewReader(body))
			req.Header.Set("Content-Type", "application/json")
			w := httptest.NewRecorder()
			s.router.ServeHTTP(w, req)

			s.Equal(tc.expectedStatus, w.Code, "HTTP status code mismatch")

			if tc.expectedBody != nil {
				expectedJSON, err := json.Marshal(tc.expectedBody)
				s.NoError(err, "Failed to marshal expected body")
				s.JSONEq(string(expectedJSON), w.Body.String(), "Response body mismatch")
			}
		})
	}
}