/**
 * @fileoverview 
 * @module config/store-config
 * @description 
 */

(global => {
    'use strict';

    const EXCHANGE_RATES = Object.freeze({
        FB: 2000, 
        WA: 1000  
    });

    const ALL_PROMO_PACKAGES = Object.freeze([
        {
            id: "pkg_fb_tier1_500",
            platform: "fb",
            name: "باقة فيسبوك القياسية ($500)",
            cost: 500.00,
            basePoints: 1000000,
            bonusPct: 0.00,
            bonusPoints: 0,
            totalPoints: 1000000,
            desc: "تمنحك 1,000,000 نقطة فيسبوك صافية بمعدل $1 = 2,000 FB",
            badge: "قياسية",
            color: "#1877f2",
            bg: "#eff6ff",
            border: "var(--border)",
            icon: "fa-brands fa-facebook"
        },
        {
            id: "pkg_fb_tier2_1000",
            platform: "fb",
            name: "باقة فيسبوك الكبرى ($1,000)",
            cost: 1000.00,
            basePoints: 2000000,
            bonusPct: 0.00,
            bonusPoints: 0,
            totalPoints: 2000000,
            desc: "تمنحك 2,000,000 نقطة فيسبوك صافية بمعدل $1 = 2,000 FB",
            badge: "كبرى",
            color: "#1877f2",
            bg: "#eff6ff",
            border: "var(--border)",
            icon: "fa-brands fa-facebook"
        },
        {
            id: "pkg_wa_tier1_500",
            platform: "wa",
            name: "باقة واتساب القياسية ($500)",
            cost: 500.00,
            basePoints: 500000,
            bonusPct: 0.00,
            bonusPoints: 0,
            totalPoints: 500000,
            desc: "تمنحك 500,000 نقطة واتساب صافية بمعدل $1 = 1,000 WA",
            badge: "قياسية",
            color: "#00a884",
            bg: "#f0fdf4",
            border: "var(--border)",
            icon: "fa-brands fa-whatsapp"
        },
        {
            id: "pkg_wa_tier2_1000",
            platform: "wa",
            name: "باقة واتساب الكبرى ($1,000)",
            cost: 1000.00,
            basePoints: 1000000,
            bonusPct: 0.00,
            bonusPoints: 0,
            totalPoints: 1000000,
            desc: "تمنحك 1,000,000 نقطة واتساب صافية بمعدل $1 = 1,000 WA",
            badge: "كبرى",
            color: "#00a884",
            bg: "#f0fdf4",
            border: "var(--border)",
            icon: "fa-brands fa-whatsapp"
        }
    ]);

    /**
     * @param {number} usdValue 
     * @returns {number} 
     */
    const getDynamicSpendBonus = (usdValue) => {
        return 0.00; 
    };

    /**
     * @param {string} type 
     * @param {number} amount 
     * @param {number} cost 
     * @param {number} balanceAfter 
     * @returns {Promise<string>} 
     */
    async function calculateExchangeSignature(type, amount, cost, balanceAfter) {
        try {
            const currentAccountId = global.FritreeCrypto && typeof global.FritreeCrypto.getOrGenerateAccountId === 'function'
                ? await global.FritreeCrypto.getOrGenerateAccountId()
                : "standalone_fallback_id";

            const salt = global.FritreeAppConstants?.SECURITY_SALTS?.STORE_INTEGRITY_SALT ||
                "FritreeSymmetricExchangeRegistrySecureValidationMatrix_2026_StrictIntegritySeal";

            const payloadText = `EXCHANGE_TX:${type}:${amount}:${cost}:${balanceAfter}:${currentAccountId}:${salt}`;

            if (global.FritreeCrypto && typeof global.FritreeCrypto.sha256 === 'function') {
                return await global.FritreeCrypto.sha256(payloadText);
            }

            let hash = 0;
            for (let i = 0; i < payloadText.length; i++) {
                const char = payloadText.charCodeAt(i);
                hash = ((hash << 5) - hash) + char;
                hash |= 0;
            }
            return "store_sig_sha256_" + Math.abs(hash).toString(16);
        } catch (e) {
            console.error("[Fritree Store Config] Failed to generate transaction signature:", e);
            return "sig_error_fallback";
        }
    }

    /**
     * @param {string} sourceType 
     * @param {string} targetType 
     * @param {number} amount 
     * @returns {{ targetAmount: number, ratioText: string }}
     */
    const calculateSwapOutput = (sourceType, targetType, amount) => {
        const srcAmount = parseFloat(amount) || 0;
        if (srcAmount <= 0 || sourceType === targetType) {
            return { targetAmount: 0, ratioText: "1 : 1" };
        }

        let targetAmount = 0;
        let ratioText = "";

        if (sourceType === 'fb' && targetType === 'wa') {
            targetAmount = Math.floor(srcAmount * 0.5);
            ratioText = "2 FB = 1 WA (معادلة التبديل المباشرة)";
        } else if (sourceType === 'wa' && targetType === 'fb') {
            targetAmount = Math.floor(srcAmount * 2.0);
            ratioText = "1 WA = 2 FB (معادلة التبديل المباشرة)";
        } else if (sourceType === 'fb' && targetType === 'usd') {
            targetAmount = Math.floor((srcAmount / 2000.0) * 100) / 100;
            ratioText = "2,000 FB = $1.00 USD";
        } else if (sourceType === 'wa' && targetType === 'usd') {
            targetAmount = Math.floor((srcAmount / 1000.0) * 100) / 100;
            ratioText = "1,000 WA = $1.00 USD";
        } else if (sourceType === 'usd' && targetType === 'fb') {
            targetAmount = Math.floor(srcAmount * 2000.0);
            ratioText = "$1.00 USD = 2,000 FB";
        } else if (sourceType === 'usd' && targetType === 'wa') {
            targetAmount = Math.floor(srcAmount * 1000.0);
            ratioText = "$1.00 USD = 1,000 WA";
        }

        return { targetAmount, ratioText };
    };

    /**
     * @param {string} sourceType 
     * @param {string} targetType 
     * @param {number} sourceAmount 
     * @param {number} targetAmount 
     * @param {string} timestamp 
     * @returns {Promise<string>}
     */
    async function calculateSwapSignature(sourceType, targetType, sourceAmount, targetAmount, timestamp) {
        try {
            const currentAccountId = global.FritreeCrypto && typeof global.FritreeCrypto.getOrGenerateAccountId === 'function'
                ? await global.FritreeCrypto.getOrGenerateAccountId()
                : "standalone_fallback_id";

            const salt = global.FritreeAppConstants?.SECURITY_SALTS?.STORE_INTEGRITY_SALT ||
                "FritreeSymmetricExchangeRegistrySecureValidationMatrix_2026_StrictIntegritySeal";

            const payloadText = `SWAP_TX:${sourceType}:${targetType}:${sourceAmount}:${targetAmount}:${timestamp}:${currentAccountId}:${salt}`;

            if (global.FritreeCrypto && typeof global.FritreeCrypto.sha256 === 'function') {
                return await global.FritreeCrypto.sha256(payloadText);
            }

            let hash = 0;
            for (let i = 0; i < payloadText.length; i++) {
                const char = payloadText.charCodeAt(i);
                hash = ((hash << 5) - hash) + char;
                hash |= 0;
            }
            return "swap_sig_sha256_" + Math.abs(hash).toString(16);
        } catch (e) {
            console.error("[Fritree Store Config] Failed to generate swap signature:", e);
            return "swap_sig_fallback";
        }
    }

    global.FritreeStoreConfig = Object.freeze({
        EXCHANGE_RATES,
        ALL_PROMO_PACKAGES,
        getDynamicSpendBonus,
        calculateExchangeSignature,
        calculateSwapOutput,
        calculateSwapSignature
    });

})(typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : this);