/**
 * LOCALIZATION SYSTEM
 * Multi-language support with JSON translation files
 */
class LocalizationSystem {
    constructor() {
        this.currentLang = 'en'; // Default language
        this.translations = {};
        this.supportedLanguages = ['slo', 'en', 'de', 'it', 'cn'];

        // Load from localStorage
        const savedLang = localStorage.getItem('novafarma_language');
        if (savedLang && this.supportedLanguages.includes(savedLang)) {
            this.currentLang = savedLang;
        }

        this.loadTranslations();
    }

    loadTranslations() {
        // Embedded translations (inline for simplicity)
        this.translations = {
            'slo': {
                // UI
                'ui.inventory': 'Inventar',
                'ui.crafting': 'Izdelovanje',
                'ui.health': 'Zdravje',
                'ui.hunger': 'Lakota',
                'ui.oxygen': 'Kisik',
                'ui.day': 'Dan',
                'ui.season': 'Letni čas',

                // Items
                'item.wood': 'Les',
                'item.stone': 'Kamen',
                'item.seeds': 'Semena',
                'item.wheat': 'Pšenica',
                'item.corn': 'Koruza',

                // Actions
                'action.plant': 'Posadi',
                'action.harvest': 'Požanji',
                'action.craft': 'Izdelaj',
                'action.build': 'Zgradi',

                // Seasons
                'season.spring': 'Pomlad',
                'season.summer': 'Poletje',
                'season.autumn': 'Jesen',
                'season.winter': 'Zima',

                // Messages
                'msg.demo_end': 'Demo končan! Hvala za igranje.',
                'msg.freezing': '❄️ Zmrzuješ!',
                'msg.overheating': '🔥 Pregrevanje!'
            },
            'en': {
                // UI
                'ui.inventory': 'Inventory',
                'ui.crafting': 'Crafting',
                'ui.health': 'Health',
                'ui.hunger': 'Hunger',
                'ui.oxygen': 'Oxygen',
                'ui.day': 'Day',
                'ui.season': 'Season',

                // Items
                'item.wood': 'Wood',
                'item.stone': 'Stone',
                'item.seeds': 'Seeds',
                'item.wheat': 'Wheat',
                'item.corn': 'Corn',

                // Actions
                'action.plant': 'Plant',
                'action.harvest': 'Harvest',
                'action.craft': 'Craft',
                'action.build': 'Build',

                // Seasons
                'season.spring': 'Spring',
                'season.summer': 'Summer',
                'season.autumn': 'Autumn',
                'season.winter': 'Winter',

                // Messages
                'msg.demo_end': 'Demo Ended! Thanks for playing.',
                'msg.freezing': '❄️ Freezing!',
                'msg.overheating': '🔥 Overheating!'
            },
            'de': {
                'ui.inventory': 'Inventar',
                'ui.crafting': 'Handwerk',
                'ui.health': 'Gesundheit',
                'season.spring': 'Frühling',
                'season.summer': 'Sommer',
                'season.autumn': 'Herbst',
                'season.winter': 'Winter'
            },
            'it': {
                'ui.inventory': 'Inventario',
                'ui.crafting': 'Artigianato',
                'season.spring': 'Primavera',
                'season.summer': 'Estate',
                'season.autumn': 'Autunno',
                'season.winter': 'Inverno'
            },
            'cn': {
                'ui.inventory': '库存',
                'ui.crafting': '制作',
                'season.spring': '春天',
                'season.summer': '夏天',
                'season.autumn': '秋天',
                'season.winter': '冬天'
            }
        };
    }

    /**
     * Get translated string
     * @param {string} key - Translation key (e.g. 'ui.inventory')
     * @param {string} fallback - Fallback text if translation missing
     */
    t(key, fallback = key) {
        const lang = this.translations[this.currentLang];
        if (lang && lang[key]) {
            return lang[key];
        }

        // Fallback to English
        const enLang = this.translations['en'];
        if (enLang && enLang[key]) {
            return enLang[key];
        }

        return fallback;
    }

    /**
     * Set current language
     */
    setLanguage(langCode) {
        if (this.supportedLanguages.includes(langCode)) {
            this.currentLang = langCode;
            localStorage.setItem('novafarma_language', langCode);
            console.log(`🌍 Language changed to: ${langCode}`);
            return true;
        }
        return false;
    }

    getCurrentLanguage() {
        return this.currentLang;
    }

    getSupportedLanguages() {
        return this.supportedLanguages.map(code => ({
            code,
            name: this.getLanguageName(code)
        }));
    }

    getLanguageName(code) {
        const names = {
            'slo': 'Slovenščina',
            'en': 'English',
            'de': 'Deutsch',
            'it': 'Italiano',
            'cn': '中文'
        };
        return names[code] || code;
    }
}

// Global instance
window.LocalizationSystem = LocalizationSystem;