import XCTest
@testable import iosApp
import SwiftUI

final class DesignSystemTests: XCTestCase {

    // MARK: - Color Tests

    func testPrimaryColorsExist() {
        // Then
        XCTAssertNotNil(AppColors.primary)
        XCTAssertNotNil(AppColors.primaryLight)
        XCTAssertNotNil(AppColors.primaryDark)
    }

    func testAccentColorsExist() {
        // Then
        XCTAssertNotNil(AppColors.accent)
        XCTAssertNotNil(AppColors.accentLight)
    }

    func testSemanticColorsExist() {
        // Then
        XCTAssertNotNil(AppColors.success)
        XCTAssertNotNil(AppColors.warning)
        XCTAssertNotNil(AppColors.error)
        XCTAssertNotNil(AppColors.info)
    }

    func testNeutralColorsExist() {
        // Then
        XCTAssertNotNil(AppColors.background)
        XCTAssertNotNil(AppColors.surface)
        XCTAssertNotNil(AppColors.surfaceSecondary)
        XCTAssertNotNil(AppColors.textPrimary)
        XCTAssertNotNil(AppColors.textSecondary)
        XCTAssertNotNil(AppColors.textTertiary)
        XCTAssertNotNil(AppColors.border)
        XCTAssertNotNil(AppColors.borderLight)
    }

    func testTaskStatusColorsExist() {
        // Then
        XCTAssertNotNil(AppColors.taskUpcoming)
        XCTAssertNotNil(AppColors.taskInProgress)
        XCTAssertNotNil(AppColors.taskCompleted)
        XCTAssertNotNil(AppColors.taskCanceled)
        XCTAssertNotNil(AppColors.taskArchived)
    }

    func testGradientsExist() {
        // Then
        XCTAssertNotNil(AppColors.primaryGradient)
        XCTAssertNotNil(AppColors.accentGradient)
    }

    // MARK: - Typography Tests

    func testDisplayTypographyExists() {
        // Then
        XCTAssertNotNil(AppTypography.displayLarge)
        XCTAssertNotNil(AppTypography.displayMedium)
        XCTAssertNotNil(AppTypography.displaySmall)
    }

    func testHeadlineTypographyExists() {
        // Then
        XCTAssertNotNil(AppTypography.headlineLarge)
        XCTAssertNotNil(AppTypography.headlineMedium)
        XCTAssertNotNil(AppTypography.headlineSmall)
    }

    func testTitleTypographyExists() {
        // Then
        XCTAssertNotNil(AppTypography.titleLarge)
        XCTAssertNotNil(AppTypography.titleMedium)
        XCTAssertNotNil(AppTypography.titleSmall)
    }

    func testBodyTypographyExists() {
        // Then
        XCTAssertNotNil(AppTypography.bodyLarge)
        XCTAssertNotNil(AppTypography.bodyMedium)
        XCTAssertNotNil(AppTypography.bodySmall)
    }

    func testLabelTypographyExists() {
        // Then
        XCTAssertNotNil(AppTypography.labelLarge)
        XCTAssertNotNil(AppTypography.labelMedium)
        XCTAssertNotNil(AppTypography.labelSmall)
    }

    // MARK: - Spacing Tests

    func testSpacingValuesAreCorrect() {
        // Then
        XCTAssertEqual(AppSpacing.xxs, 4)
        XCTAssertEqual(AppSpacing.xs, 8)
        XCTAssertEqual(AppSpacing.sm, 12)
        XCTAssertEqual(AppSpacing.md, 16)
        XCTAssertEqual(AppSpacing.lg, 24)
        XCTAssertEqual(AppSpacing.xl, 32)
        XCTAssertEqual(AppSpacing.xxl, 48)
        XCTAssertEqual(AppSpacing.xxxl, 64)
    }

    // MARK: - Radius Tests

    func testRadiusValuesAreCorrect() {
        // Then
        XCTAssertEqual(AppRadius.xs, 4)
        XCTAssertEqual(AppRadius.sm, 8)
        XCTAssertEqual(AppRadius.md, 12)
        XCTAssertEqual(AppRadius.lg, 16)
        XCTAssertEqual(AppRadius.xl, 20)
        XCTAssertEqual(AppRadius.xxl, 24)
        XCTAssertEqual(AppRadius.full, 9999)
    }

    // MARK: - Shadow Tests

    func testShadowsExist() {
        // Then
        XCTAssertNotNil(AppShadow.sm)
        XCTAssertNotNil(AppShadow.md)
        XCTAssertNotNil(AppShadow.lg)
        XCTAssertNotNil(AppShadow.xl)
    }

    // MARK: - Color Extension Tests

    func testColorFromValidHexString() {
        // When
        let color = Color(hex: "FF0000")

        // Then
        XCTAssertNotNil(color)
    }

    func testColorFromInvalidHexString() {
        // When
        let color = Color(hex: "INVALID")

        // Then
        XCTAssertNil(color)
    }

    func testColorFrom3DigitHex() {
        // When
        let color = Color(hex: "F00")

        // Then
        XCTAssertNotNil(color)
    }

    func testColorFrom6DigitHex() {
        // When
        let color = Color(hex: "FF0000")

        // Then
        XCTAssertNotNil(color)
    }

    func testColorFrom8DigitHex() {
        // When
        let color = Color(hex: "FF0000FF")

        // Then
        XCTAssertNotNil(color)
    }
}