/**
 * ============================================================================
 * MOCK FONT DATA
 * ============================================================================
 *
 * Factory functions and preset mock data for fonts.
 * Used in Storybook stories, tests, and development.
 *
 * ## Usage
 *
 * ```ts
 * import {
 *     mockGoogleFont,
 *     mockFontshareFont,
 *     mockUnifiedFont,
 *     GOOGLE_FONTS,
 *     FONTHARE_FONTS,
 *     UNIFIED_FONTS,
 * } from '$entities/Font/lib/mocks';
 *
 * // Create a mock Google Font
 * const roboto = mockGoogleFont({ family: 'Roboto', category: 'sans-serif' });
 *
 * // Create a mock Fontshare font
 * const satoshi = mockFontshareFont({ name: 'Satoshi', slug: 'satoshi' });
 *
 * // Create a mock UnifiedFont
 * const font = mockUnifiedFont({ id: 'roboto', name: 'Roboto' });
 *
 * // Use preset fonts
 * import { UNIFIED_FONTS } from '$entities/Font/lib/mocks';
 * ```
 */

import type {
    FontCategory,
    FontProvider,
    FontSubset,
    FontVariant,
} from '$entities/Font/model/types';
import type {
    FontFeatures,
    FontMetadata,
    FontStyleUrls,
    UnifiedFont,
} from '$entities/Font/model/types';

// UNIFIED FONT MOCKS

/**
 * Options for creating a mock UnifiedFont
 */
export interface MockUnifiedFontOptions {
    /** Unique identifier (default: derived from name) */
    id?: string;
    /** Font display name (default: 'Mock Font') */
    name?: string;
    /** Font provider (default: 'google') */
    provider?: FontProvider;
    /** Font category (default: 'sans-serif') */
    category?: FontCategory;
    /** Font subsets (default: ['latin']) */
    subsets?: FontSubset[];
    /** Font variants (default: ['regular', '700', 'italic', '700italic']) */
    variants?: FontVariant[];
    /** Style URLs (if not provided, mock URLs are generated) */
    styles?: FontStyleUrls;
    /** Metadata overrides */
    metadata?: Partial<FontMetadata>;
    /** Features overrides */
    features?: Partial<FontFeatures>;
}

/**
 * Default mock UnifiedFont
 */
export function mockUnifiedFont(options: MockUnifiedFontOptions = {}): UnifiedFont {
    const {
        id,
        name = 'Mock Font',
        provider = 'google',
        category = 'sans-serif',
        subsets = ['latin'],
        variants = ['regular', '700', 'italic', '700italic'],
        styles,
        metadata,
        features,
    } = options;

    const fontId = id ?? name.toLowerCase().replace(/\s+/g, '');
    const baseUrl = provider === 'google'
        ? `https://fonts.gstatic.com/s/${fontId}/v30`
        : `//cdn.fontshare.com/wf/${fontId}`;

    return {
        id: fontId,
        name,
        provider,
        category,
        subsets,
        variants: variants as FontVariant[],
        styles: styles ?? {
            regular: `${baseUrl}/regular.woff2`,
            bold: `${baseUrl}/bold.woff2`,
            italic: `${baseUrl}/italic.woff2`,
            boldItalic: `${baseUrl}/bolditalic.woff2`,
        },
        metadata: {
            cachedAt: Date.now(),
            version: '1.0',
            lastModified: new Date().toISOString().split('T')[0],
            popularity: 1,
            ...metadata,
        },
        features: {
            isVariable: false,
            ...features,
        },
    };
}

/**
 * Preset UnifiedFont mocks
 */
export const UNIFIED_FONTS: Record<string, UnifiedFont> = {
    roboto: mockUnifiedFont({
        id: 'roboto',
        name: 'Roboto',
        provider: 'google',
        category: 'sans-serif',
        subsets: ['latin', 'latin-ext'],
        variants: ['100', '300', '400', '500', '700', '900'],
        metadata: { popularity: 1 },
    }),
    openSans: mockUnifiedFont({
        id: 'open-sans',
        name: 'Open Sans',
        provider: 'google',
        category: 'sans-serif',
        subsets: ['latin', 'latin-ext'],
        variants: ['300', '400', '500', '600', '700', '800'],
        metadata: { popularity: 2 },
    }),
    lato: mockUnifiedFont({
        id: 'lato',
        name: 'Lato',
        provider: 'google',
        category: 'sans-serif',
        subsets: ['latin', 'latin-ext'],
        variants: ['100', '300', '400', '700', '900'],
        metadata: { popularity: 3 },
    }),
    playfairDisplay: mockUnifiedFont({
        id: 'playfair-display',
        name: 'Playfair Display',
        provider: 'google',
        category: 'serif',
        subsets: ['latin'],
        variants: ['400', '700', '900'],
        metadata: { popularity: 10 },
    }),
    montserrat: mockUnifiedFont({
        id: 'montserrat',
        name: 'Montserrat',
        provider: 'google',
        category: 'sans-serif',
        subsets: ['latin', 'latin-ext'],
        variants: ['100', '200', '300', '400', '500', '600', '700', '800', '900'],
        metadata: { popularity: 4 },
    }),
    satoshi: mockUnifiedFont({
        id: 'satoshi',
        name: 'Satoshi',
        provider: 'fontshare',
        category: 'sans-serif',
        subsets: ['latin'],
        variants: ['regular', 'bold', 'italic', 'bolditalic'] as FontVariant[],
        features: { isVariable: true, axes: [{ name: 'wght', property: 'wght', default: 400, min: 300, max: 700 }] },
        metadata: { popularity: 15000 },
    }),
    generalSans: mockUnifiedFont({
        id: 'general-sans',
        name: 'General Sans',
        provider: 'fontshare',
        category: 'sans-serif',
        subsets: ['latin'],
        variants: ['regular', 'bold', 'italic', 'bolditalic'] as FontVariant[],
        features: { isVariable: true },
        metadata: { popularity: 12000 },
    }),
    clashDisplay: mockUnifiedFont({
        id: 'clash-display',
        name: 'Clash Display',
        provider: 'fontshare',
        category: 'display',
        subsets: ['latin'],
        variants: ['regular', '500', '600', 'bold'] as FontVariant[],
        features: { tags: ['Headlines', 'Posters', 'Branding'] },
        metadata: { popularity: 8000 },
    }),
    oswald: mockUnifiedFont({
        id: 'oswald',
        name: 'Oswald',
        provider: 'google',
        category: 'sans-serif',
        subsets: ['latin'],
        variants: ['200', '300', '400', '500', '600', '700'],
        metadata: { popularity: 6 },
    }),
    raleway: mockUnifiedFont({
        id: 'raleway',
        name: 'Raleway',
        provider: 'google',
        category: 'sans-serif',
        subsets: ['latin'],
        variants: ['100', '200', '300', '400', '500', '600', '700', '800', '900'],
        metadata: { popularity: 7 },
    }),
};

/**
 * Get an array of all preset UnifiedFonts
 */
export function getAllMockFonts(): UnifiedFont[] {
    return Object.values(UNIFIED_FONTS);
}

/**
 * Get fonts by provider
 */
export function getFontsByProvider(provider: FontProvider): UnifiedFont[] {
    return getAllMockFonts().filter(font => font.provider === provider);
}

/**
 * Get fonts by category
 */
export function getFontsByCategory(category: FontCategory): UnifiedFont[] {
    return getAllMockFonts().filter(font => font.category === category);
}

/**
 * Generate an array of mock fonts with sequential naming
 */
export function generateMockFonts(count: number, options?: Omit<MockUnifiedFontOptions, 'id' | 'name'>): UnifiedFont[] {
    return Array.from({ length: count }, (_, i) =>
        mockUnifiedFont({
            ...options,
            id: `mock-font-${i + 1}`,
            name: `Mock Font ${i + 1}`,
        }));
}

/**
 * Generate an array of mock fonts with different categories
 */
export function generateMixedCategoryFonts(countPerCategory: number = 2): UnifiedFont[] {
    const categories: FontCategory[] = ['sans-serif', 'serif', 'display', 'handwriting', 'monospace'];
    const fonts: UnifiedFont[] = [];

    categories.forEach(category => {
        for (let i = 0; i < countPerCategory; i++) {
            fonts.push(
                mockUnifiedFont({
                    id: `${category}-${i + 1}`,
                    name: `${category.replace('-', ' ')} ${i + 1}`,
                    category,
                }),
            );
        }
    });

    return fonts;
}