package main

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

	"github.com/labstack/echo/v5"
	"github.com/stretchr/testify/assert"
)

// TestUsernameWhitespaceValidation tests that whitespace-only usernames are rejected
func TestUsernameWhitespaceValidation(t *testing.T) {
	// This would require integration testing with actual handler
	t.Skip("Requires integration test with real handler")
}

// TestRoleCaseNormalization tests that roles are normalized to lowercase
func TestRoleCaseNormalization(t *testing.T) {
	// This would require integration testing with actual handler
	t.Skip("Requires integration test with real handler")
}

// TestPaginationMaxLimit tests that pagination has a maximum limit
func TestPaginationMaxLimit(t *testing.T) {
	// This is tested in ebook_test.go
	t.Skip("Already tested in TestPaginationAndFiltering")
}

// TestPaginationNegativeOffset tests that negative offset is rejected
func TestPaginationNegativeOffset(t *testing.T) {
	// This is tested in ebook_test.go
	t.Skip("Already tested in TestPaginationAndFiltering")
}

// TestRateLimiter tests the rate limiting middleware
func TestRateLimiter(t *testing.T) {
	e := echo.New()

	// Create a simple handler
	handler := func(c *echo.Context) error {
		return c.String(http.StatusOK, "ok")
	}

	// Create rate limiter: 3 requests per minute
	config := ratelimitConfig{
		RequestsPerMinute: 3,
		CleanupInterval:   1 * time.Minute,
	}
	rl := newRateLimiter(config)
	rateLimitMiddleware := rateLimiterMiddleware(rl)

	// Wrap handler
	wrappedHandler := rateLimitMiddleware(handler)

	// Make 3 successful requests
	for i := 0; i < 3; i++ {
		req := httptest.NewRequest("GET", "/test", nil)
		req.RemoteAddr = "192.168.1.1:1234"
		rec := httptest.NewRecorder()

		c := e.NewContext(req, rec)
		err := wrappedHandler(c)

		assert.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)
	}

	// 4th request should be rate limited
	req := httptest.NewRequest("GET", "/test", nil)
	req.RemoteAddr = "192.168.1.1:1234"
	rec := httptest.NewRecorder()

	c := e.NewContext(req, rec)
	err := wrappedHandler(c)

	assert.NoError(t, err)
	assert.Equal(t, http.StatusTooManyRequests, rec.Code)
}

// Mock rate limiter types for testing
type ratelimitConfig struct {
	RequestsPerMinute int
	CleanupInterval   time.Duration
}

func newRateLimiter(config ratelimitConfig) *mockRateLimiter {
	return &mockRateLimiter{
		config:   config,
		requests: make(map[string]int),
	}
}

type mockRateLimiter struct {
	requests map[string]int
	config   ratelimitConfig
}

func (m *mockRateLimiter) Allow(ip string) bool {
	count := m.requests[ip]
	if count >= m.config.RequestsPerMinute {
		return false
	}
	m.requests[ip]++
	return true
}

func rateLimiterMiddleware(rl *mockRateLimiter) echo.MiddlewareFunc {
	return func(next echo.HandlerFunc) echo.HandlerFunc {
		return func(c *echo.Context) error {
			ip := c.RealIP()
			if ip == "" {
				ip = c.Request().RemoteAddr
			}
			if !rl.Allow(ip) {
				return c.JSON(http.StatusTooManyRequests, map[string]string{
					"error": "too many requests",
				})
			}
			return next(c)
		}
	}
}
