package middleware

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

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

func TestNoStoreSensitiveResponses(t *testing.T) {
	gin.SetMode(gin.TestMode)

	tests := []struct {
		name       string
		path       string
		fullPath   string
		wantNoCache bool
	}{
		{
			name:       "auth login path",
			path:       "/api/v1/auth/login",
			fullPath:   "/api/v1/auth/login",
			wantNoCache: true,
		},
		{
			name:       "auth register path",
			path:       "/api/v1/auth/register",
			fullPath:   "/api/v1/auth/register",
			wantNoCache: true,
		},
		{
			name:       "non-auth path",
			path:       "/api/v1/users",
			fullPath:   "/api/v1/users",
			wantNoCache: false,
		},
		{
			name:       "empty fullPath uses request path",
			path:       "/api/v1/auth/refresh",
			fullPath:   "",
			wantNoCache: true,
		},
		{
			name:       "subpath of auth",
			path:       "/api/v1/auth/oauth/callback",
			fullPath:   "/api/v1/auth/oauth/callback",
			wantNoCache: true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			router := gin.New()
			router.Use(NoStoreSensitiveResponses())
			router.GET(tt.path, func(c *gin.Context) {
				c.String(200, "OK")
			})

			w := httptest.NewRecorder()
			req, _ := http.NewRequest("GET", tt.path, nil)
			router.ServeHTTP(w, req)

			if tt.wantNoCache {
				assert.Equal(t, "no-store, no-cache, must-revalidate, max-age=0", w.Header().Get("Cache-Control"))
				assert.Equal(t, "no-cache", w.Header().Get("Pragma"))
				assert.Equal(t, "0", w.Header().Get("Expires"))
				assert.Equal(t, "no-store", w.Header().Get("Surrogate-Control"))
			} else {
				assert.Empty(t, w.Header().Get("Cache-Control"))
				assert.Empty(t, w.Header().Get("Pragma"))
			}
		})
	}
}

func TestShouldDisableCaching(t *testing.T) {
	tests := []struct {
		name        string
		routePath   string
		requestPath string
		expected    bool
	}{
		{
			name:        "auth prefix match",
			routePath:   "/api/v1/auth/login",
			requestPath: "/api/v1/auth/login",
			expected:    true,
		},
		{
			name:        "no auth prefix",
			routePath:   "/api/v1/users",
			requestPath: "/api/v1/users",
			expected:    false,
		},
		{
			name:        "empty routePath uses requestPath",
			routePath:   "",
			requestPath: "/api/v1/auth/logout",
			expected:    true,
		},
		{
			name:        "trimmed spaces",
			routePath:   "  /api/v1/auth/login  ",
			requestPath: "/api/v1/auth/login",
			expected:    true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			result := shouldDisableCaching(tt.routePath, tt.requestPath)
			assert.Equal(t, tt.expected, result)
		})
	}
}
