package middleware

import (
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
)

func TestLoginAttemptTracker_RecordFailedAttempt(t *testing.T) {
	tracker := NewLoginAttemptTracker(3, 5*time.Minute, 5*time.Minute)

	username := "testuser"

	// First failed attempt
	locked, remainingTime := tracker.RecordFailedAttempt(username)
	assert.False(t, locked)
	assert.Equal(t, time.Duration(0), remainingTime)

	// Second failed attempt
	locked, remainingTime = tracker.RecordFailedAttempt(username)
	assert.False(t, locked)
	assert.Equal(t, time.Duration(0), remainingTime)

	// Third failed attempt - should lock
	locked, remainingTime = tracker.RecordFailedAttempt(username)
	assert.True(t, locked)
	assert.Greater(t, remainingTime, time.Duration(0))

	// Verify user is locked
	locked, _ = tracker.IsLocked(username)
	assert.True(t, locked)

	// Clear attempts
	tracker.ClearAttempts(username)

	// Should no longer be locked
	locked, _ = tracker.IsLocked(username)
	assert.False(t, locked)
}

func TestLoginAttemptTracker_IsLocked(t *testing.T) {
	tracker := NewLoginAttemptTracker(3, 5*time.Minute, 5*time.Minute)

	username := "lockeduser"

	// Record failed attempts up to max
	for i := 0; i < 3; i++ {
		tracker.RecordFailedAttempt(username)
	}

	// Verify user is locked
	locked, remainingTime := tracker.IsLocked(username)
	assert.True(t, locked)
	assert.Greater(t, remainingTime, time.Duration(0))

	// Clear attempts
	tracker.ClearAttempts(username)

	// Should no longer be locked
	locked, remainingTime = tracker.IsLocked(username)
	assert.False(t, locked)
	assert.Equal(t, time.Duration(0), remainingTime)
}

func TestLoginAttemptTracker_ConcurrentAccess(t *testing.T) {
	tracker := NewLoginAttemptTracker(5, 5*time.Minute, 5*time.Minute)

	done := make(chan bool, 10)

	// Concurrent access from multiple goroutines
	for i := 0; i < 10; i++ {
		go func(index int) {
			username := "user" + string(rune('0'+index))
			tracker.RecordFailedAttempt(username)
			tracker.IsLocked(username)
			tracker.ClearAttempts(username)
			done <- true
		}(i)
	}

	// Wait for all goroutines
	for i := 0; i < 10; i++ {
		<-done
	}

	// Should complete without deadlock or race
}

func TestDeviceRateLimiter_CheckRateLimit(t *testing.T) {
	limiter := NewDeviceRateLimiter()

	config := DeviceRateLimitConfig{
		SyncRequestsPerMinute: 5,
	}

	deviceID := "test-device-123"
	requestType := "sync"

	// First 5 requests should succeed
	for i := 0; i < 5; i++ {
		allowed := limiter.CheckRateLimit(deviceID, requestType, config)
		assert.True(t, allowed, "Request %d should be allowed", i+1)
	}

	// 6th request should be rate limited
	allowed := limiter.CheckRateLimit(deviceID, requestType, config)
	assert.False(t, allowed, "Request 6 should be rate limited")

	// Get remaining requests
	remaining := limiter.GetRemainingRequests(deviceID, requestType, config)
	assert.Equal(t, 0, remaining)
}

func TestDeviceRateLimiter_DifferentDevices(t *testing.T) {
	limiter := NewDeviceRateLimiter()

	config := DeviceRateLimitConfig{
		SyncRequestsPerMinute: 2,
	}

	// Exhaust limit for device1
	for i := 0; i < 2; i++ {
		limiter.CheckRateLimit("device1", "sync", config)
	}

	// Device1 should be rate limited
	allowed := limiter.CheckRateLimit("device1", "sync", config)
	assert.False(t, allowed)

	// Device2 should still work
	allowed = limiter.CheckRateLimit("device2", "sync", config)
	assert.True(t, allowed)
}

func TestDeviceRateLimiter_GetRemainingRequests(t *testing.T) {
	limiter := NewDeviceRateLimiter()

	config := DeviceRateLimitConfig{
		SyncRequestsPerMinute: 10,
	}

	deviceID := "test-device-456"

	// Initially should have all requests remaining
	remaining := limiter.GetRemainingRequests(deviceID, "sync", config)
	assert.Equal(t, 10, remaining)

	// Use 3 requests
	for i := 0; i < 3; i++ {
		limiter.CheckRateLimit(deviceID, "sync", config)
	}

	// Should have 7 remaining
	remaining = limiter.GetRemainingRequests(deviceID, "sync", config)
	assert.Equal(t, 7, remaining)
}

func TestNewRateLimiter(t *testing.T) {
	config := RateLimiterConfig{
		Enabled:           true,
		RequestsPerMinute: 60,
		CleanupInterval:   time.Minute,
	}
	limiter := NewRateLimiter(config)

	assert.NotNil(t, limiter)
}