package v1

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

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"

	"github.com/gochat/gochat/internal/model"
	"github.com/gochat/gochat/internal/repository"
	"github.com/gochat/gochat/internal/service"
)

func setupNotionIntegrationRouter(t *testing.T) (*gin.Engine, *gorm.DB) {
	t.Helper()
	gin.SetMode(gin.TestMode)
	r := gin.New()
	r.RedirectTrailingSlash = false

	db, err := gorm.Open(sqlite.Open("file::memory:"), &gorm.Config{Logger: logger.Default.LogMode(logger.Silent)})
	require.NoError(t, err)
	require.NoError(t, db.AutoMigrate(&model.Account{}, &model.IntegrationHook{}))
	t.Cleanup(func() {
		sqlDB, _ := db.DB()
		_ = sqlDB.Close()
	})

	handler := NewNotionIntegrationHandler(service.NewNotionIntegrationService(repository.NewIntegrationHookRepo(db)))

	account := r.Group("/api/v1/accounts/:account_id")
	account.POST("/notion/authorization", handler.Authorization)
	integrations := account.Group("/integrations")
	RegisterNotionIntegrationRoutes(integrations, handler)

	return r, db
}

// ========================================
// NotionIntegration — param validation tests
// ========================================

func TestNotionIntegration_Delete_BadAccountID(t *testing.T) {
	r, _ := setupNotionIntegrationRouter(t)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("DELETE", "/api/v1/accounts/abc/integrations/notion/", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	errBody := resp["error"].(map[string]interface{})
	assert.Contains(t, errBody["message"], "invalid account_id")
}

func TestNotionIntegration_Authorization_BadAccountID(t *testing.T) {
	r, _ := setupNotionIntegrationRouter(t)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/abc/notion/authorization", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	errBody := resp["error"].(map[string]interface{})
	assert.Contains(t, errBody["message"], "invalid account_id")
}

func TestNotionIntegration_Authorization_ReturnsChatwootPayload(t *testing.T) {
	t.Setenv("NOTION_CLIENT_ID", "notion-client")
	t.Setenv("NOTION_CLIENT_SECRET", "notion-secret")
	t.Setenv("FRONTEND_URL", "https://app.example.test/")
	r, db := setupNotionIntegrationRouter(t)
	account := &model.Account{Name: "Test Account"}
	require.NoError(t, db.Create(account).Error)

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

	assert.Equal(t, http.StatusOK, w.Code)
	var resp map[string]interface{}
	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &resp))
	assert.Equal(t, true, resp["success"])
	assert.Contains(t, resp["url"], "https://api.notion.com/v1/oauth/authorize")
	assert.Contains(t, resp["url"], "redirect_uri=https%3A%2F%2Fapp.example.test%2Fnotion%2Fcallback")
}

func TestNotionIntegration_Delete_NoTrailingSlashReturnsEmptyOK(t *testing.T) {
	r, db := setupNotionIntegrationRouter(t)
	account := &model.Account{Name: "Test Account"}
	require.NoError(t, db.Create(account).Error)
	hook := &model.IntegrationHook{AccountID: account.ID, AppID: "notion", HookType: model.HookTypeNotion, Status: model.HookStatusActive, AccessToken: "notion-token"}
	require.NoError(t, db.Create(hook).Error)

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

	assert.Equal(t, http.StatusOK, w.Code)
	assert.Empty(t, w.Body.String())

	var count int64
	db.Model(&model.IntegrationHook{}).Where("account_id = ? AND app_id = ?", account.ID, "notion").Count(&count)
	assert.Equal(t, int64(0), count)
}