package v1

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

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

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

// csatMockDBProvider implements automation.DBProvider for validation-only tests.
// DB() returns nil — service methods are never reached since validation fails first.
type csatMockDBProvider struct{}

func (m *csatMockDBProvider) DB() *gorm.DB { return nil }

func setupCsatSurveyRouter(handler *CsatSurveyHandler) *gin.Engine {
	gin.SetMode(gin.TestMode)
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/csats", handler.List)
	r.GET("/api/v1/accounts/:account_id/csats/metrics", handler.Metrics)
	r.POST("/api/v1/accounts/:account_id/csats/:id/update_review_notes", handler.UpdateReviewNotes)
	return r
}

func newTestCsatSurveyHandler() *CsatSurveyHandler {
	svc := automation.NewCsatSurveyService(&csatMockDBProvider{})
	return NewCsatSurveyHandler(svc)
}

// --- List endpoint tests ---

func TestCsatSurveyList_InvalidAccountID(t *testing.T) {
	handler := newTestCsatSurveyHandler()
	router := setupCsatSurveyRouter(handler)

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

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

// --- Metrics endpoint tests ---

func TestCsatSurveyMetrics_InvalidAccountID(t *testing.T) {
	handler := newTestCsatSurveyHandler()
	router := setupCsatSurveyRouter(handler)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/xyz/csats/metrics", nil)
	router.ServeHTTP(w, req)

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

// --- UpdateReviewNotes endpoint tests ---

func TestCsatSurveyUpdateReviewNotes_InvalidID(t *testing.T) {
	handler := newTestCsatSurveyHandler()
	router := setupCsatSurveyRouter(handler)

	body := `{"csat_review_notes":"looks good"}`
	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/1/csats/xyz/update_review_notes", strings.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(w, req)

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

func TestCsatSurveyUpdateReviewNotes_InvalidJSON(t *testing.T) {
	handler := newTestCsatSurveyHandler()
	router := setupCsatSurveyRouter(handler)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/1/csats/1/update_review_notes", strings.NewReader("{invalid}"))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(w, req)

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