package game

import (
	"testing"

	"gitea.boner.be/bdnugget/goonscape/game/testutils"
	rl "github.com/gen2brain/raylib-go/raylib"
	"github.com/stretchr/testify/assert"
)

func TestLoginScreen_Update(t *testing.T) {
	login := NewLoginScreen()

	// Test field focus switching
	simulateMouseClick(400, 215) // Click username field
	assert.Equal(t, 0, login.focusedField)

	simulateMouseClick(400, 265) // Click password field
	assert.Equal(t, 1, login.focusedField)

	// Test input length limits
	login.focusedField = 0
	for i := 0; i < 20; i++ {
		simulateCharInput('x')
	}
	assert.LessOrEqual(t, len(login.username), 12)

	login.focusedField = 1
	for i := 0; i < 30; i++ {
		simulateCharInput('x')
	}
	assert.LessOrEqual(t, len(login.password), 20)

	// Test mode switching
	simulateMouseClick(600, 365) // Click switch mode button
	assert.True(t, login.isRegistering)
	simulateMouseClick(600, 365) // Click again
	assert.False(t, login.isRegistering)

	// Test submission
	login.username = "test"
	login.password = "password"
	testutils.SimulateMousePosition(400, 365)
	testutils.SimulateMouseButton(testutils.ToInt32(rl.MouseLeftButton), true)
	username, password, isRegistering, submitted := login.Update()
	assert.True(t, submitted)
	assert.Equal(t, "test", username)
	assert.Equal(t, "password", password)
	assert.False(t, isRegistering)
}

func TestLoginScreen_ErrorHandling(t *testing.T) {
	login := NewLoginScreen()

	// Test empty fields
	login.username = ""
	login.password = "test"
	testutils.SimulateMousePosition(400, 365)
	testutils.SimulateMouseButton(testutils.ToInt32(rl.MouseLeftButton), true)
	_, _, _, submitted := login.Update()
	assert.False(t, submitted)
	assert.Contains(t, login.errorMessage, "username")

	// Test special characters
	login.username = "test!@#"
	login.password = "password"
	testutils.SimulateMousePosition(400, 365)
	testutils.SimulateMouseButton(testutils.ToInt32(rl.MouseLeftButton), true)
	_, _, _, submitted = login.Update()
	assert.False(t, submitted)
	assert.Contains(t, login.errorMessage, "invalid characters")

	// Test error message display
	login.SetError("Test error")
	assert.Equal(t, "Test error", login.errorMessage)
}

func simulateMouseClick(x, y float32) {
	// Implementation would depend on how raylib is mocked
}