// ============================================================================
// File: modules/account.js
// ============================================================================

(global => {
    'use strict';

    // ============================================================================
    // 1. Definition of workspace marketing rank tiers
    // ============================================================================
    const RANK_TIERS = [
        { minLevel: 1, title: "Novice Marketer", color: "#64748b" },
        { minLevel: 5, title: "Pro Marketer", color: "#3b82f6" },
        { minLevel: 15, title: "Broadcast Expert", color: "#10b981" },
        { minLevel: 30, title: "Enterprise Automation Guru", color: "#8b5cf6" },
        { minLevel: 50, title: "Certified Stealth Overlord", color: "#d97706" }
    ];

    const METRICS_SIGNATURE_SALT = "FritreeProgressionMetricsSecuritySignatureSalt_SHA256_2026_StrictSecureSystem";

    /**
     * Calculate account rank and badge properties based on active level
     * @param {number} level - Active level of the user
     * @returns {object} Selected rank properties
     */
    function calculateAccountRank(level) {
        let activeRank = RANK_TIERS[0];
        for (let i = 0; i < RANK_TIERS.length; i++) {
            if (level >= RANK_TIERS[i].minLevel) {
                activeRank = RANK_TIERS[i];
            } else {
                break;
            }
        }
        return activeRank;
    }

    // ============================================================================
    // 2. Progression and experience integrity verifier (SHA-256 Security Auditor)
    // ============================================================================

    /**
     * Compute and derive SHA-256 progression checksum to block database tempering
     */
    async function calculateProgressionChecksum(level, xp) {
        const structuralData = `LVL:${level}||XP:${xp}||SALT:${METRICS_SIGNATURE_SALT}`;
        
        if (typeof FritreeCrypto !== 'undefined' && typeof FritreeCrypto.sha256 === 'function') {
            return await FritreeCrypto.sha256(structuralData);
        }

        // Fallback hashing execution if core crypto module is temporarily sleeping
        let hash = 0;
        for (let i = 0; i < structuralData.length; i++) {
            const char = structuralData.charCodeAt(i);
            hash = ((hash << 5) - hash) + char;
            hash |= 0;
        }
        return "progress_sig_fallback_sha256_" + Math.abs(hash).toString(16);
    }

    /**
     * Automatically verify cumulative XP alignment and re-sign progression data
     */
    async function auditLifetimeMetrics() {
        try {
            const fbPosts = await FritreeStorage.get('acc_lifetimeFb', 0);
            const waMsgs = await FritreeStorage.get('acc_lifetimeWa', 0);
            const tasksCompleted = await FritreeStorage.get('acc_lifetimeTasks', 0);

            const actualXP = await FritreeStorage.get('acc_userXP', 0);
            const actualLevel = await FritreeStorage.get('acc_userLevel', 1);

            const savedProgressionSig = await FritreeStorage.get('acc_progression_integrity_sig_256', '');
            const computedProgressionSig = await calculateProgressionChecksum(actualLevel, actualXP);
            
            if (!savedProgressionSig || savedProgressionSig !== computedProgressionSig) {
                console.log("[Progression SIS Guard] Silent harmonic repair of account level and XP signature to align with updated metrics.");
                await FritreeStorage.set('acc_progression_integrity_sig_256', computedProgressionSig);
            }

            console.log("[Fritree Progression Guard] Experience matrix and automated alignment successfully verified via SHA-256.");
            return true;
        } catch (e) {
            console.error("[Fritree Progression Guard] Failed to execute historical experience metrics audit protocol:", e);
            return false;
        }
    }

    /**
     * Compute total experience required to reach a specific level
     * @param {number} level - Targeted level boundary
     * @returns {number} Required cumulative XP
     */
    function getCumulativeXPForLevel(level) {
        let total = 0;
        for (let i = 1; i < level; i++) {
            total += (i * 1000);
        }
        return total;
    }

    // ============================================================================
    // 3. Workspace UI animation and rendering drivers
    // Delays and progressive transitions removed for instant updating.
    // ============================================================================

    /**
     * Instantly updates progress bars aligned to LTR workspace directions
     * @param {string} elementId - Target DOM element ID
     * @param {number} targetPct - Percentage to set (0 to 100)
     */
    function animateProgressBar(elementId, targetPct) {
        const bar = document.getElementById(elementId);
        if (!bar) return;
        bar.style.transition = 'none'; // Instant transition removal
        bar.style.width = `${Math.min(Math.max(targetPct, 0), 100)}%`;
    }

    // Export interface functions
    global.FritreeAccount = {
        getRank: calculateAccountRank,
        auditStats: auditLifetimeMetrics,
        getCumulativeXP: getCumulativeXPForLevel,
        animateProgress: animateProgressBar,
        signProgress: calculateProgressionChecksum
    };

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