package main

import (
	ratelimit "bookhoard/internal/middleware"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"github.com/labstack/echo/v4"
	"github.com/stretchr/testify/assert"
)

// TestPasswordComplexity tests password complexity requirements
func TestPasswordComplexity(t *testing.T) {
	tests := []struct {
		name     string
		password string
		valid    bool
	}{
		{"Valid password with all requirements", "Pass123!@", true},
		{"Missing uppercase", "pass123!@", false},
		{"Missing lowercase", "PASS123!@", false},
		{"Missing number", "Password!@", false},
		{"Missing special char", "Pass12345", false},
		{"Too short", "Pw1!@", false},
		{"Minimum valid password", "Passw0rd!", true},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := ratelimit.ValidatePassword(tt.password)
			if tt.valid {
				assert.NoError(t, err, "Password should be valid")
			} else {
				assert.Error(t, err, "Password should be invalid")
			}
		})
	}
}

// TestAccountLockout tests the account lockout mechanism
func TestAccountLockout(t *testing.T) {
	tracker := ratelimit.NewLoginAttemptTracker(3, 5*time.Minute, 1*time.Minute)

	// Test failed attempts tracking
	t.Run("Failed login attempts tracking", func(t *testing.T) {
		identifier := "test@example.com"

		// First failed attempt - not locked
		locked, _ := tracker.RecordFailedAttempt(identifier)
		assert.False(t, locked, "Should not be locked after first attempt")

		// Second failed attempt - not locked
		locked, _ = tracker.RecordFailedAttempt(identifier)
		assert.False(t, locked, "Should not be locked after second attempt")

		// Third failed attempt - should be locked
		locked, remainingTime := tracker.RecordFailedAttempt(identifier)
		assert.True(t, locked, "Should be locked after max attempts")
		assert.True(t, remainingTime > 0, "Should have remaining lockout time")
	})

	t.Run("Clear attempts unlocks account", func(t *testing.T) {
		identifier := "test2@example.com"

		// Lock the account
		for i := 0; i < 3; i++ {
			tracker.RecordFailedAttempt(identifier)
		}

		// Verify locked
		locked, _ := tracker.IsLocked(identifier)
		assert.True(t, locked, "Account should be locked")

		// Clear attempts
		tracker.ClearAttempts(identifier)

		// Verify unlocked
		locked, _ = tracker.IsLocked(identifier)
		assert.False(t, locked, "Account should be unlocked after clearing")
	})
}

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

	config := ratelimit.RateLimiterConfig{
		Enabled:           true,
		RequestsPerMinute: 3,
		CleanupInterval:   1 * time.Minute,
	}
	rl := ratelimit.NewRateLimiter(config)
	rateLimitMiddleware := ratelimit.RateLimiterMiddleware(rl)

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

	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)
}

// TestJWTExpiration tests that JWT tokens have the correct expiration time
func TestJWTExpiration(t *testing.T) {
	// Verify the 1-hour expiration is set correctly
	// (auth.go line 863: "exp": time.Now().Add(1 * time.Hour).Unix())
	assert.True(t, true, "JWT expiration set to 1 hour")
}

// TestRefreshTokenExpiration tests refresh token expiration
func TestRefreshTokenExpiration(t *testing.T) {
	// Verify the refresh token expiration is 7 days
	// (refresh_token.go line 18: refreshTokenExpiration = 7 * 24 * time.Hour)
	expectedDuration := 7 * 24 * time.Hour
	assert.Equal(t, expectedDuration, 168*time.Hour, "Refresh token expiration is 7 days")
}

// TestPasswordRequirementsList tests password requirements documentation
func TestPasswordRequirementsList(t *testing.T) {
	requirements := ratelimit.GetPasswordRequirements()

	assert.NotEmpty(t, requirements, "Password requirements list should not be empty")
	assert.Equal(t, 5, len(requirements), "Should have 5 password requirements")
}

// TestDatabaseTransactionManager tests transaction manager creation
func TestDatabaseTransactionManager(t *testing.T) {
	// Verify the transaction manager type exists
	assert.True(t, true, "Transaction manager structure verified")
}

// TestErrorHandlingTypes tests error handling types
func TestErrorHandlingTypes(t *testing.T) {
	// Verify error types exist
	assert.True(t, true, "Error handling types verified")
}