package v1

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/gin-gonic/gin"
	"github.com/gochat/gochat/internal/model"
	"github.com/gochat/gochat/internal/repository"
	"github.com/gochat/gochat/internal/service"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/suite"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
)

type WebhookSubscriptionHandlerTestSuite struct {
	suite.Suite
	db      *gorm.DB
	handler *WebhookSubscriptionHandler
	account *model.Account
}

func (s *WebhookSubscriptionHandlerTestSuite) SetupSuite() {
	gin.SetMode(gin.TestMode)
	db, err := gorm.Open(sqlite.Open("file::memory:"), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	s.Require().NoError(err)
	s.Require().NoError(db.AutoMigrate(&model.Account{}, &model.Inbox{}, &model.WebhookSubscription{}))
	s.db = db

	repo := repository.NewWebhookSubscriptionRepo(db)
	svc := service.NewWebhookSubscriptionService(repo)
	s.handler = NewWebhookSubscriptionHandler(svc)

	s.account = &model.Account{Name: "test-webhook-account"}
	s.Require().NoError(db.Create(s.account).Error)
}

func (s *WebhookSubscriptionHandlerTestSuite) TearDownSuite() {
	if s.db != nil {
		sqlDB, _ := s.db.DB()
		sqlDB.Close()
	}
}

func TestWebhookSubscriptionHandlerSuite(t *testing.T) {
	suite.Run(t, new(WebhookSubscriptionHandlerTestSuite))
}

func (s *WebhookSubscriptionHandlerTestSuite) TestList_Success() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/webhooks", s.handler.List)

	_, err := s.handler.webhookSubscriptionService.CreateWebhook(context.Background(), s.account.ID, service.WebhookSubscriptionMutation{
		Name:          "List hook",
		URL:           "https://example.com/list-hook",
		Subscriptions: []string{"message_created"},
	})
	s.Require().NoError(err)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", fmt.Sprintf("/api/v1/accounts/%d/webhooks", s.account.ID), nil)
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	var body map[string]any
	s.Require().NoError(json.Unmarshal(w.Body.Bytes(), &body))
	payload := body["payload"].(map[string]any)
	webhooks := payload["webhooks"].([]any)
	s.NotEmpty(webhooks)
}

func (s *WebhookSubscriptionHandlerTestSuite) TestCreate_Success_ChatwootPayload() {
	r := gin.New()
	r.POST("/api/v1/accounts/:account_id/webhooks", s.handler.Create)

	body := `{"webhook":{"name":"Created hook","url":"https://example.com/created-hook","subscriptions":["conversation_created","message_created"]}}`
	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", fmt.Sprintf("/api/v1/accounts/%d/webhooks", s.account.ID), bytes.NewBufferString(body))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	var parsed map[string]any
	s.Require().NoError(json.Unmarshal(w.Body.Bytes(), &parsed))
	webhook := parsed["payload"].(map[string]any)["webhook"].(map[string]any)
	s.Equal("Created hook", webhook["name"])
	s.Equal("https://example.com/created-hook", webhook["url"])
	s.NotEmpty(webhook["secret"])
	s.Equal([]any{"conversation_created", "message_created"}, webhook["subscriptions"])
}

func (s *WebhookSubscriptionHandlerTestSuite) TestUpdate_Success_ChatwootPayload() {
	created, err := s.handler.webhookSubscriptionService.CreateWebhook(context.Background(), s.account.ID, service.WebhookSubscriptionMutation{
		Name:          "Before",
		URL:           "https://example.com/update-before",
		Subscriptions: []string{"message_created"},
	})
	s.Require().NoError(err)

	r := gin.New()
	r.PATCH("/api/v1/accounts/:account_id/webhooks/:webhook_id", s.handler.Update)

	body := `{"webhook":{"name":"After","url":"https://example.com/update-after","subscriptions":["contact_created"]}}`
	w := httptest.NewRecorder()
	req, _ := http.NewRequest("PATCH", fmt.Sprintf("/api/v1/accounts/%d/webhooks/%d", s.account.ID, created.ID), bytes.NewBufferString(body))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	var parsed map[string]any
	s.Require().NoError(json.Unmarshal(w.Body.Bytes(), &parsed))
	webhook := parsed["payload"].(map[string]any)["webhook"].(map[string]any)
	s.Equal("After", webhook["name"])
	s.Equal("https://example.com/update-after", webhook["url"])
	s.Equal([]any{"contact_created"}, webhook["subscriptions"])
}

func (s *WebhookSubscriptionHandlerTestSuite) TestDelete_Success_ReturnsEmptyOK() {
	created, err := s.handler.webhookSubscriptionService.CreateWebhook(context.Background(), s.account.ID, service.WebhookSubscriptionMutation{
		Name:          "Delete",
		URL:           "https://example.com/delete-hook",
		Subscriptions: []string{"message_created"},
	})
	s.Require().NoError(err)

	r := gin.New()
	r.DELETE("/api/v1/accounts/:account_id/webhooks/:webhook_id", s.handler.Delete)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("DELETE", fmt.Sprintf("/api/v1/accounts/%d/webhooks/%d", s.account.ID, created.ID), nil)
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	s.Empty(w.Body.String())
}

func (s *WebhookSubscriptionHandlerTestSuite) TestCreate_BadRequest_EmptyBody() {
	r := gin.New()
	r.POST("/api/v1/accounts/:account_id/webhooks", s.handler.Create)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", fmt.Sprintf("/api/v1/accounts/%d/webhooks", s.account.ID), nil)
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *WebhookSubscriptionHandlerTestSuite) TestGet_BadRequest_InvalidID() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/webhooks/:webhook_id", s.handler.Get)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", fmt.Sprintf("/api/v1/accounts/%d/webhooks/abc", s.account.ID), nil)
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *WebhookSubscriptionHandlerTestSuite) TestUpdate_BadRequest_InvalidID() {
	r := gin.New()
	r.PATCH("/api/v1/accounts/:account_id/webhooks/:webhook_id", s.handler.Update)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("PATCH", fmt.Sprintf("/api/v1/accounts/%d/webhooks/abc", s.account.ID), bytes.NewBufferString(`{"webhook":{"url":"https://example.com","subscriptions":["message_created"]}}`))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *WebhookSubscriptionHandlerTestSuite) TestDelete_BadRequest_InvalidID() {
	r := gin.New()
	r.DELETE("/api/v1/accounts/:account_id/webhooks/:webhook_id", s.handler.Delete)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("DELETE", fmt.Sprintf("/api/v1/accounts/%d/webhooks/abc", s.account.ID), nil)
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *WebhookSubscriptionHandlerTestSuite) TestListDeliveries_BadRequest_InvalidID() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/webhooks/:webhook_id/subscriptions/:webhook_id/deliveries", s.handler.ListDeliveries)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", fmt.Sprintf("/api/v1/accounts/%d/webhooks/1/subscriptions/abc/deliveries", s.account.ID), nil)
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}