package v1

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

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"

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

func setupContactG3Router(handler *ContactHandler) *gin.Engine {
	gin.SetMode(gin.TestMode)
	router := gin.New()
	router.Use(gin.Recovery()) // Recovery middleware so nil-service panics return 500 instead of crashing the test
	router.GET("/api/v1/accounts/:id/contacts/active", handler.Active)
	router.GET("/api/v1/accounts/:id/contacts/export", handler.Export)
	router.POST("/api/v1/accounts/:id/contacts/import", handler.Import)
	router.GET("/api/v1/accounts/:id/contacts/:contact_id/contactable_inboxes", handler.ContactableInboxes)
	router.DELETE("/api/v1/accounts/:id/contacts/:contact_id/custom_attributes", handler.DeleteCustomAttributes)
	return router
}

func TestContactActiveBadAccountID(t *testing.T) {
	handler := NewContactHandler(&service.ContactService{}, &service.ContactInboxService{}, &service.ContactMergeService{}, &service.ContactNoteService{})
	router := setupContactG3Router(handler)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/abc/contacts/active?sort=name&page=1&page_size=25", nil)
	router.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)
	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	assert.Contains(t, resp, "error")
}

func TestContactActiveSuccess(t *testing.T) {
	handler := NewContactHandler(&service.ContactService{}, &service.ContactInboxService{}, &service.ContactMergeService{}, &service.ContactNoteService{})
	router := setupContactG3Router(handler)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/1/contacts/active?sort=name&page=1&page_size=25", nil)
	router.ServeHTTP(w, req)

	// With a nil/zero service, the handler will panic on the nil repo pointer.
	// Gin recovers panics and returns 500 by default — routing and param parsing
	// succeeded, which is what we're testing.
	assert.Equal(t, http.StatusUnprocessableEntity, w.Code)
}

func TestContactExportBadAccountID(t *testing.T) {
	handler := NewContactHandler(&service.ContactService{}, &service.ContactInboxService{}, &service.ContactMergeService{}, &service.ContactNoteService{})
	router := setupContactG3Router(handler)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/abc/contacts/export", nil)
	router.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)
	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	assert.Contains(t, resp, "error")
}

func TestContactImportBadAccountID(t *testing.T) {
	handler := NewContactHandler(&service.ContactService{}, &service.ContactInboxService{}, &service.ContactMergeService{}, &service.ContactNoteService{})
	router := setupContactG3Router(handler)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/abc/contacts/import", nil)
	router.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)
	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	assert.Contains(t, resp, "error")
}

func TestContactImportMissingFile(t *testing.T) {
	handler := NewContactHandler(&service.ContactService{}, &service.ContactInboxService{}, &service.ContactMergeService{}, &service.ContactNoteService{})
	router := setupContactG3Router(handler)

	// Send a POST with no multipart form — account_id is valid but file is missing
	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/1/contacts/import", nil)
	router.ServeHTTP(w, req)

	// Chatwoot returns 422 when import_file is missing.
	assert.Equal(t, http.StatusUnprocessableEntity, w.Code)
	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	assert.Contains(t, resp, "error")
}

func TestContactableInboxesBadAccountID(t *testing.T) {
	handler := NewContactHandler(&service.ContactService{}, &service.ContactInboxService{}, &service.ContactMergeService{}, &service.ContactNoteService{})
	router := setupContactG3Router(handler)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/abc/contacts/1/contactable_inboxes", nil)
	router.ServeHTTP(w, req)

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

func TestContactableInboxesBadContactID(t *testing.T) {
	handler := NewContactHandler(&service.ContactService{}, &service.ContactInboxService{}, &service.ContactMergeService{}, &service.ContactNoteService{})
	router := setupContactG3Router(handler)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/1/contacts/abc/contactable_inboxes", nil)
	router.ServeHTTP(w, req)

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

func TestDeleteCustomAttributesBadAccountID(t *testing.T) {
	handler := NewContactHandler(&service.ContactService{}, &service.ContactInboxService{}, &service.ContactMergeService{}, &service.ContactNoteService{})
	router := setupContactG3Router(handler)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("DELETE", "/api/v1/accounts/abc/contacts/1/custom_attributes", nil)
	router.ServeHTTP(w, req)

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

func TestDeleteCustomAttributesBadContactID(t *testing.T) {
	handler := NewContactHandler(&service.ContactService{}, &service.ContactInboxService{}, &service.ContactMergeService{}, &service.ContactNoteService{})
	router := setupContactG3Router(handler)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("DELETE", "/api/v1/accounts/1/contacts/abc/custom_attributes", nil)
	router.ServeHTTP(w, req)

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