/**
 * currency_helpers.php
 * /app/Helpers/currency_helpers.php
 * This original/initial version is DEPRECATED
 */

// Critical Info:

/* ************
All previous/existing fees fetching, fees structure, fees application/implementation, fees calculation, as well as all previous/existing fx rates, fx conversion, currency data, currency settings, currency formatting, calculation, etc helpers, methods, functions and classes must now delegate to the NEW currency + fees management suite, which implements records in the following db tables as source of truth for my fintech app/website platform.

modular_currency_data,
modular_currency_rates,
modular_currency_rates_history,
modular_currency_settings,
modular_fee_internal_names,
modular_fee_process_types,
modular_fee_structures

These NEW currency + fees management suite scripts include:
/app/Classes/PaymentModule.php
/app/Classes/fxMasterSuite.php
/app/Classes/SimpleFileCache.php

Fee structures are created and managed by the super_admin with the following script:
/app/Legacy/admin/fees-management.php which has been adapted from /app/Legacy/admin/admin_fees_management.php 
************  */





/**
 * ============================================================================
 * CURRENCY HELPERS
 * ============================================================================
 */

/**
 * Get currency symbol from database (with fallback)
 * 
 * @param string $currencyCode The currency code (e.g., USD, NGN)
 * @param mysqli|null $db Database connection (optional)
 * @return string Currency symbol
 */
function getCurrencySymbol($currencyCode, $db = null) {
    // Try to use FxCalculator first (most reliable)
    global $fxCalculator;
    
    if (isset($fxCalculator) && $fxCalculator instanceof MasterFxCalculator) {
        return $fxCalculator->getCurrencySymbol($currencyCode);
    }
    
    // Try database lookup
    if ($db) {
        try {
            $stmt = $db->prepare("SELECT symbol FROM currency_data WHERE currency_code = ? AND is_active = 1");
            $stmt->bind_param('s', $currencyCode);
            $stmt->execute();
            $result = $stmt->get_result();
            if ($row = $result->fetch_assoc()) {
                return $row['symbol'];
            }
        } catch (Exception $e) {
            error_log("Error getting currency symbol: " . $e->getMessage());
        }
    }
    
    // Fallback symbols
    $symbols = [
        'USD' => '$', 'EUR' => '€', 'GBP' => '£', 'NGN' => '₦',
        'GHS' => 'GH₵', 'KES' => 'KSh', 'ZAR' => 'R', 'CNY' => '¥',
        'JPY' => '¥', 'CAD' => 'C$', 'AUD' => 'A$', 'CHF' => 'Fr',
        'INR' => '₹', 'BRL' => 'R$', 'MXN' => '$', 'SGD' => 'S$'
    ];
    return $symbols[$currencyCode] ?? '$';
}

/**
 * Format amount with currency symbol
 * 
 * @param float|int|string $amount The amount to format
 * @param string $currencyCode The currency code
 * @param int|null $decimals Number of decimal places (optional, uses currency defaults)
 * @param mysqli|null $db Database connection (optional)
 * @return string Formatted amount with currency symbol
 */
function formatCurrency($amount, $currencyCode, $decimals = null, $db = null) {
    // Try to use FxCalculator
    global $fxCalculator;
    
    if (isset($fxCalculator) && $fxCalculator instanceof MasterFxCalculator) {
        return $fxCalculator->formatAmount($amount, $currencyCode, $decimals);
    }
    
    // Get decimals from database if not provided
    if ($decimals === null && $db) {
        try {
            $stmt = $db->prepare("SELECT decimals FROM currency_data WHERE currency_code = ? AND is_active = 1");
            $stmt->bind_param('s', $currencyCode);
            $stmt->execute();
            $result = $stmt->get_result();
            if ($row = $result->fetch_assoc()) {
                $decimals = (int)$row['decimals'];
            }
        } catch (Exception $e) {
            error_log("Error getting decimals: " . $e->getMessage());
        }
    }
    
    $decimals = $decimals ?? 2;
    $symbol = getCurrencySymbol($currencyCode, $db);
    $formatted = number_format((float)$amount, $decimals);
    return $symbol . $formatted;
}

/**
 * Convert amount between currencies using MasterFxCalculator
 * 
 * @param float|int|string $amount The amount to convert
 * @param string $fromCurrency Source currency code
 * @param string $toCurrency Target currency code
 * @param mysqli|null $db Database connection (optional)
 * @return float Converted amount
 */
function convertCurrency($amount, $fromCurrency, $toCurrency, $db = null) {
    // If same currency, no conversion needed
    if ($fromCurrency === $toCurrency) {
        return (float)$amount;
    }
    
    // Try to use FxCalculator (most reliable)
    global $fxCalculator;
    
    if (isset($fxCalculator) && $fxCalculator instanceof MasterFxCalculator) {
        $rate = $fxCalculator->getRate($fromCurrency, $toCurrency);
        return (float)$amount * $rate;
    }
    
    // Fallback: query database directly
    if ($db) {
        $baseCurrency = getBaseCurrency($db);
        
        try {
            $stmt = $db->prepare("SELECT external_rates FROM currency_rates 
                                  WHERE base_currency = ? 
                                  ORDER BY last_updated DESC LIMIT 1");
            $stmt->bind_param('s', $baseCurrency);
            $stmt->execute();
            $result = $stmt->get_result();
            $row = $result->fetch_assoc();
            
            if ($row) {
                $rates = json_decode($row['external_rates'], true);
                
                if (isset($rates[$fromCurrency]) && isset($rates[$toCurrency])) {
                    $inBase = (float)$amount / $rates[$fromCurrency];
                    return $inBase * $rates[$toCurrency];
                }
            }
        } catch (Exception $e) {
            error_log("Error converting currency: " . $e->getMessage());
        }
    }
    
    // Ultimate fallback - return original amount
    error_log("Currency conversion failed, using original amount: $fromCurrency -> $toCurrency");
    return (float)$amount;
}

/**
 * Get base currency from database
 * 
 * @param mysqli|null $db Database connection (optional)
 * @return string Base currency code
 */
/**
 * Get base currency from database - SOURCE OF TRUTH: currency_settings table
 */
function getBaseCurrency($db = null) {
    static $baseCurrency = null;
    
    if ($baseCurrency !== null) {
        return $baseCurrency;
    }
    
    // Try to use MasterFxCalculator first (it now uses currency_settings)
    global $fxCalculator;
    if (isset($fxCalculator) && $fxCalculator instanceof MasterFxCalculator) {
        $baseCurrency = $fxCalculator->getBaseCurrency();
        return $baseCurrency;
    }
    
    // Direct database query if calculator not available
    if ($db) {
        try {
            // PRIMARY SOURCE: currency_settings
            $result = $db->query("SELECT base_currency FROM currency_settings WHERE id = 1");
            if ($result && $row = $result->fetch_assoc()) {
                $baseCurrency = $row['base_currency'];
                return $baseCurrency;
            }
            
            // FALLBACK: folrun_currency_settings
            $result = $db->query("SELECT base_currency FROM folrun_currency_settings WHERE id = 1");
            if ($result && $row = $result->fetch_assoc()) {
                $baseCurrency = $row['base_currency'];
                return $baseCurrency;
            }
        } catch (Exception $e) {
            error_log("Error getting base currency: " . $e->getMessage());
        }
    }
    
    $baseCurrency = defined('DEFAULT_BASE_CURRENCY') ? DEFAULT_BASE_CURRENCY : 'USD';
    return $baseCurrency;
}


/**
 * Get fee by key from database
 */
function getFeeByKey_XXX($feeKey, $db = null) {
    if ($db === null) {
        global $db;
    }
    
    try {
        $stmt = $db->prepare("SELECT fee_value, fee_type FROM folrun_fee_settings 
                              WHERE fee_key = ? AND is_active = 1 LIMIT 1");
        if ($stmt) {
            $stmt->bind_param('s', $feeKey);
            $stmt->execute();
            $result = $stmt->get_result();
            return $result->fetch_assoc();
        }
    } catch (Exception $e) {
        error_log("Error getting fee by key: " . $e->getMessage());
    }
    
    return null;
}



/**
 * Get fee by transaction type, wallet type, and user role
 */
function getFeeByTransactionAndWallet($transactionType, $walletType, $userRole, $db = null) {
    if ($db === null) {
        global $db;
    }
    
    try {
        $sql = "SELECT * FROM folrun_fee_settings 
                WHERE is_active = 1 
                AND (transaction_type = ? OR transaction_type = 'all')
                AND (wallet_type = ? OR wallet_type = 'all')
                AND (user_role = ? OR user_role = 'all')
                ORDER BY 
                    CASE WHEN transaction_type = ? THEN 1 ELSE 2 END,
                    CASE WHEN wallet_type = ? THEN 1 ELSE 2 END,
                    CASE WHEN user_role = ? THEN 1 ELSE 2 END
                LIMIT 1";
        
        $stmt = $db->prepare($sql);
        $stmt->bind_param('ssssss', $transactionType, $walletType, $userRole, $transactionType, $walletType, $userRole);
        $stmt->execute();
        $result = $stmt->get_result();
        return $result->fetch_assoc();
    } catch (Exception $e) {
        error_log("Error getting fee by transaction and wallet: " . $e->getMessage());
        return null;
    }
}



/**
 * Get admin currency from database
 * 
 * @param mysqli|null $db Database connection (optional)
 * @return string Admin currency code
 */
function getAdminCurrency($db = null) {
    static $adminCurrency = null;
    
    if ($adminCurrency !== null) {
        return $adminCurrency;
    }
    
    global $fxCalculator;
    if (isset($fxCalculator) && $fxCalculator instanceof MasterFxCalculator) {
        $adminCurrency = $fxCalculator->getAdminCurrency();
        return $adminCurrency;
    }
    
    if ($db) {
        try {
            $result = $db->query("SELECT default_admin_currency FROM currency_settings WHERE id = 1");
            if ($result && $row = $result->fetch_assoc()) {
                $adminCurrency = $row['default_admin_currency'];
                return $adminCurrency;
            }
            
            $result = $db->query("SELECT default_admin_currency FROM folrun_currency_settings WHERE id = 1");
            if ($result && $row = $result->fetch_assoc()) {
                $adminCurrency = $row['default_admin_currency'];
                return $adminCurrency;
            }
        } catch (Exception $e) {
            error_log("Error getting admin currency: " . $e->getMessage());
        }
    }
    
    $adminCurrency = defined('DEFAULT_ADMIN_CURRENCY') ? DEFAULT_ADMIN_CURRENCY : 'GHS';
    return $adminCurrency;
}

/**
 * Get all active currencies with rates
 * 
 * @param mysqli $db Database connection
 * @return array Array of currencies with their data and rates
 */
function getAllCurrenciesWithRates($db) {
    $baseCurrency = getBaseCurrency($db);
    $currencies = [];
    
    try {
        // Get currency data
        $result = $db->query("SELECT currency_code, symbol, name, decimals, fallback_rate 
                              FROM currency_data WHERE is_active = 1 
                              ORDER BY currency_code");
        if ($result) {
            while ($row = $result->fetch_assoc()) {
                $currencies[$row['currency_code']] = [
                    'name' => $row['name'],
                    'symbol' => $row['symbol'],
                    'decimals' => (int)$row['decimals'],
                    'fallback_rate' => (float)$row['fallback_rate']
                ];
            }
        }
        
        // Get current rates
        $stmt = $db->prepare("SELECT external_rates, internal_rates_from, internal_rates_to 
                              FROM currency_rates WHERE base_currency = ? 
                              ORDER BY last_updated DESC LIMIT 1");
        $stmt->bind_param('s', $baseCurrency);
        $stmt->execute();
        $result = $stmt->get_result();
        $row = $result->fetch_assoc();
        
        $externalRates = $row ? json_decode($row['external_rates'], true) : [];
        $internalFrom = $row ? json_decode($row['internal_rates_from'], true) : [];
        $internalTo = $row ? json_decode($row['internal_rates_to'], true) : [];
        
        foreach ($currencies as $code => &$data) {
            $data['rate'] = $externalRates[$code] ?? $data['fallback_rate'];
            $data['rate_from'] = $internalFrom[$code] ?? $data['rate'];
            $data['rate_to'] = $internalTo[$code] ?? $data['rate'];
            $data['base_currency'] = $baseCurrency;
        }
        
    } catch (Exception $e) {
        error_log("Error getting currencies with rates: " . $e->getMessage());
    }
    
    return $currencies;
}

/**
 * Get active currencies list (without rates)
 * 
 * @param mysqli $db Database connection
 * @return array Array of active currencies
 */
function getActiveCurrencies($db): array {
    $currencies = [];
    try {
        $result = $db->query("SELECT currency_code, symbol, name, decimals 
                              FROM currency_data WHERE is_active = 1 
                              ORDER BY currency_code");
        if ($result) {
            while ($row = $result->fetch_assoc()) {
                $currencies[$row['currency_code']] = [
                    'symbol' => $row['symbol'],
                    'name' => $row['name'],
                    'decimals' => (int)$row['decimals']
                ];
            }
        }
    } catch (Exception $e) {
        error_log("Error getting active currencies: " . $e->getMessage());
    }
    return $currencies;
}

/**
 * ============================================================================
 * FEE HELPERS
 * ============================================================================
 */

/**
 * Get fee structure for a specific transaction
 * 
 * @param mysqli $db Database connection
 * @param string $transaction_type Transaction type (deposit, withdrawal, etc.)
 * @param string $wallet_type Wallet type (funding, earnings, etc.)
 * @param float|int $amount Transaction amount
 * @param MasterFxCalculator|null $fxCalculator Optional FX calculator instance
 * @return array Fee breakdown
 */
function getTransactionFees($db, $transaction_type, $wallet_type, $amount, $fxCalculator = null) {
    $fees = [
        'fx_spread' => 0,
        'main_fee' => 0,
        'total' => 0
    ];
    
    try {
        // Get FX spread - try to use FxCalculator first
        if ($fxCalculator && $fxCalculator instanceof MasterFxCalculator) {
            $fees['fx_spread'] = $fxCalculator->getFee('fx_spread_nominal_perc', 0.05);
        } else {
            $sql = "SELECT fee_value FROM fee_settings 
                    WHERE fee_key = 'fx_spread' AND is_active = 1 LIMIT 1";
            $result = $db->query($sql);
            if ($result && $row = $result->fetch_assoc()) {
                $fees['fx_spread'] = (float)$row['fee_value'] / 100;
            } else {
                $fees['fx_spread'] = 0.05;
            }
        }
        
        // Get transaction-specific fee
        $sql = "SELECT * FROM fee_settings 
                WHERE (transaction_type = ? OR transaction_type = 'all')
                AND (wallet_type = ? OR wallet_type = 'all')
                AND is_active = 1
                ORDER BY 
                    CASE WHEN transaction_type = ? THEN 1 
                         WHEN transaction_type = 'all' THEN 3 
                         ELSE 2 END,
                    CASE WHEN wallet_type = ? THEN 1 
                         WHEN wallet_type = 'all' THEN 3 
                         ELSE 2 END
                LIMIT 1";
        $stmt = $db->prepare($sql);
        $stmt->bind_param('ssss', $transaction_type, $wallet_type, $transaction_type, $wallet_type);
        $stmt->execute();
        $feeSetting = $stmt->get_result()->fetch_assoc();
        
        if ($feeSetting) {
            if ($feeSetting['fee_type'] === 'flexible') {
                if ($amount < $feeSetting['threshold_amount']) {
                    $fees['main_fee'] = (float)$feeSetting['fixed_fee_value'];
                } else {
                    $fees['main_fee'] = $amount * ((float)$feeSetting['percentage_fee_value'] / 100);
                }
            } elseif ($feeSetting['fee_type'] === 'percentage') {
                $fees['main_fee'] = $amount * ((float)$feeSetting['fee_value'] / 100);
            } elseif ($feeSetting['fee_type'] === 'fixed') {
                $fees['main_fee'] = (float)$feeSetting['fee_value'];
            }
        } else {
            $fees['main_fee'] = $amount * 0.10; // Default 10%
        }
        
        $fees['total'] = ($amount * $fees['fx_spread']) + $fees['main_fee'];
        
    } catch (Exception $e) {
        error_log("Error getting fees: " . $e->getMessage());
        $fees['fx_spread'] = 0.05;
        $fees['main_fee'] = $amount * 0.10;
        $fees['total'] = ($amount * 0.05) + ($amount * 0.10);
    }
    
    return $fees;
}

/**
 * Get a specific fee by key
 * 
 * @param mysqli $db Database connection
 * @param string $feeKey The fee key to retrieve
 * @param mixed $default Default value if fee not found
 * @return mixed Fee value or array for flexible fees
 */
 
/*
function getFeeByKey($db, $feeKey, $default = 0) {
    try {
        $sql = "SELECT fee_value, fee_type, threshold_amount, fixed_fee_value, percentage_fee_value 
                FROM fee_settings 
                WHERE fee_key = ? AND is_active = 1 
                LIMIT 1";
        $stmt = $db->prepare($sql);
        $stmt->bind_param('s', $feeKey);
        $stmt->execute();
        $result = $stmt->get_result();
        $fee = $result->fetch_assoc();
        
        if ($fee) {
            if ($fee['fee_type'] === 'percentage') {
                return (float)$fee['fee_value'] / 100;
            } elseif ($fee['fee_type'] === 'fixed') {
                return (float)$fee['fee_value'];
            } elseif ($fee['fee_type'] === 'flexible') {
                return [
                    'type' => 'flexible',
                    'threshold' => (float)$fee['threshold_amount'],
                    'fixed_fee' => (float)$fee['fixed_fee_value'],
                    'percentage_fee' => (float)$fee['percentage_fee_value']
                ];
            }
        }
    } catch (Exception $e) {
        error_log("Error getting fee by key: " . $e->getMessage());
    }
    return $default;
}
*/



/**
 * Get all active fees
 * 
 * @param mysqli $db Database connection
 * @return array Array of all active fees
 */
function getAllFees($db): array {
    $fees = [];
    try {
        $result = $db->query("SELECT * FROM fee_settings WHERE is_active = 1 ORDER BY sort_order");
        if ($result) {
            while ($row = $result->fetch_assoc()) {
                $fees[] = $row;
            }
        }
    } catch (Exception $e) {
        error_log("Error getting all fees: " . $e->getMessage());
    }
    return $fees;
}

/**
 * ============================================================================
 * USER CURRENCY HELPERS
 * ============================================================================
 */

/**
 * Get user's effective currency
 * 
 * @param int $user_id User ID
 * @param mysqli|null $db Database connection (optional)
 * @return string User's currency code
 */
function getUserCurrency($user_id, $db = null) {
    static $cache = [];
    
    if (isset($cache[$user_id])) {
        return $cache[$user_id];
    }
    
    // Try to use UserManager if available
    global $userManager;
    if (isset($userManager) && $userManager instanceof UserManager) {
        $user = $userManager->getUser($user_id);
        if ($user && isset($user['currency_code'])) {
            $cache[$user_id] = $user['currency_code'];
            return $cache[$user_id];
        }
    }
    
    // Query database directly
    if ($db) {
        try {
            $stmt = $db->prepare("SELECT currency_code FROM users WHERE id = ?");
            $stmt->bind_param('i', $user_id);
            $stmt->execute();
            $result = $stmt->get_result();
            if ($row = $result->fetch_assoc()) {
                $cache[$user_id] = $row['currency_code'];
                return $cache[$user_id];
            }
        } catch (Exception $e) {
            error_log("Error getting user currency: " . $e->getMessage());
        }
    }
    
    // Default fallback
    return defined('DEFAULT_USER_CURRENCY') ? DEFAULT_USER_CURRENCY : 'NGN';
}

/**
 * Update user's currency
 * 
 * @param int $user_id User ID
 * @param string $newCurrency New currency code
 * @param mysqli $db Database connection
 * @return bool True on success, false on failure
 */
function updateUserCurrency($user_id, $newCurrency, $db) {
    try {
        $stmt = $db->prepare("UPDATE users SET currency_code = ? WHERE id = ?");
        $stmt->bind_param('si', $newCurrency, $user_id);
        return $stmt->execute();
    } catch (Exception $e) {
        error_log("Error updating user currency: " . $e->getMessage());
        return false;
    }
}

/**
 * ============================================================================
 * UTILITY FUNCTIONS
 * ============================================================================
 */

/**
 * Calculate exchange rate impact (for display)
 * 
 * @param string $fromCurrency Source currency
 * @param string $toCurrency Target currency
 * @param float|int $amount Amount to convert
 * @param mysqli|null $db Database connection (optional)
 * @return array Exchange rate impact details
 */
function getExchangeRateImpact($fromCurrency, $toCurrency, $amount, $db = null) {
    $rate = convertCurrency(1, $fromCurrency, $toCurrency, $db);
    $result = $amount * $rate;
    
    return [
        'rate' => $rate,
        'original' => $amount,
        'converted' => $result,
        'formatted_original' => formatCurrency($amount, $fromCurrency, null, $db),
        'formatted_converted' => formatCurrency($result, $toCurrency, null, $db)
    ];
}

/**
 * Format amount in multiple currencies
 * 
 * @param float|int $amount Amount to format
 * @param array $currencies Array of currency codes
 * @param mysqli|null $db Database connection (optional)
 * @return array Formatted amounts by currency
 */
function formatMultiCurrency($amount, $currencies, $db = null) {
    $result = [];
    foreach ($currencies as $currency) {
        $result[$currency] = formatCurrency($amount, $currency, null, $db);
    }
    return $result;
}

/**
 * Validate currency code
 * 
 * @param string $currencyCode Currency code to validate
 * @param mysqli|null $db Database connection (optional)
 * @return bool True if currency is valid and active
 */
function isValidCurrency($currencyCode, $db = null) {
    if ($db) {
        try {
            $stmt = $db->prepare("SELECT id FROM currency_data WHERE currency_code = ? AND is_active = 1");
            $stmt->bind_param('s', $currencyCode);
            $stmt->execute();
            return $stmt->get_result()->num_rows > 0;
        } catch (Exception $e) {
            error_log("Error validating currency: " . $e->getMessage());
        }
    }
    
    $validCurrencies = ['USD', 'EUR', 'GBP', 'NGN', 'GHS', 'KES', 'ZAR', 'CNY'];
    return in_array(strtoupper($currencyCode), $validCurrencies);
}

/**
 * Get currency data for display
 * 
 * @param string $currencyCode Currency code
 * @param mysqli|null $db Database connection (optional)
 * @return array Currency display data
 */
function getCurrencyDisplayData($currencyCode, $db = null) {
    global $fxCalculator;
    
    if (isset($fxCalculator) && $fxCalculator instanceof MasterFxCalculator) {
        $data = $fxCalculator->getCurrencyDataFromDb($currencyCode);
        return [
            'code' => $currencyCode,
            'symbol' => $data['symbol'] ?? '$',
            'name' => $data['name'] ?? $currencyCode,
            'decimals' => $data['decimals'] ?? 2
        ];
    }
    
    if ($db) {
        try {
            $stmt = $db->prepare("SELECT symbol, name, decimals FROM currency_data WHERE currency_code = ? AND is_active = 1");
            $stmt->bind_param('s', $currencyCode);
            $stmt->execute();
            $result = $stmt->get_result();
            if ($row = $result->fetch_assoc()) {
                return [
                    'code' => $currencyCode,
                    'symbol' => $row['symbol'],
                    'name' => $row['name'],
                    'decimals' => (int)$row['decimals']
                ];
            }
        } catch (Exception $e) {
            error_log("Error getting currency display data: " . $e->getMessage());
        }
    }
    
    return [
        'code' => $currencyCode,
        'symbol' => getCurrencySymbol($currencyCode),
        'name' => $currencyCode,
        'decimals' => 2
    ];
}


/**
 * Get minimum deposit amount for a user based on their role
 * Returns amount in the system base currency (from database)
 * 
 * @param int $user_id User ID
 * @param mysqli|null $db Database connection
 * @return float Minimum deposit amount in system base currency (0 = no limit)
 */
function getMinimumDepositForUser($user_id, $db = null) {
    if ($db === null) {
        global $db;
    }
    
    if (!$db) {
        return 2.00;
    }
    
    // Get user's role
    $sql = "SELECT role FROM users WHERE id = ?";
    $stmt = $db->prepare($sql);
    if (!$stmt) {
        return 2.00;
    }
    $stmt->bind_param('i', $user_id);
    $stmt->execute();
    $result = $stmt->get_result();
    $user = $result->fetch_assoc();
    
    if (!$user) {
        return 2.00;
    }
    
    $role = $user['role'];
    
    // Get limits for this role (amounts are in system base currency)
    $sql = "SELECT min_deposit_base FROM transaction_limits 
            WHERE role = ?";
    $stmt = $db->prepare($sql);
    if (!$stmt) {
        return 2.00;
    }
    $stmt->bind_param('s', $role);
    $stmt->execute();
    $result = $stmt->get_result();
    $limit = $result->fetch_assoc();
    
    // Return 0 if no limit found (meaning no minimum)
    return $limit ? (float)$limit['min_deposit_base'] : 0;
}


/**
 * Get maximum deposit amount for a user based on their role
 * 
 * @param int $user_id User ID
 * @param mysqli|null $db Database connection
 * @return float Maximum deposit amount (0 = no limit)
 */
function getMaximumDepositForUser($user_id, $db = null) {
    if ($db === null) {
        global $db;
    }
    
    if (!$db) {
        return 0;
    }
    
    $sql = "SELECT role FROM users WHERE id = ?";
    $stmt = $db->prepare($sql);
    if (!$stmt) {
        return 0;
    }
    $stmt->bind_param('i', $user_id);
    $stmt->execute();
    $result = $stmt->get_result();
    $user = $result->fetch_assoc();
    
    if (!$user) {
        return 0;
    }
    
    $role = $user['role'];
    
    $sql = "SELECT max_deposit_base FROM transaction_limits WHERE role = ?";
    $stmt = $db->prepare($sql);
    if (!$stmt) {
        return 0;
    }
    $stmt->bind_param('s', $role);
    $stmt->execute();
    $result = $stmt->get_result();
    $limit = $result->fetch_assoc();
    
    return $limit ? (float)$limit['max_deposit_base'] : 0;
}




/**
 * Get minimum withdrawal amount for a user based on their role
 * 
 * @param int $user_id User ID
 * @param string|null $currency Currency to return the amount in
 * @param mysqli|null $db Database connection
 * @return float Minimum withdrawal amount
 */
function getMinimumWithdrawalForUser($user_id, $currency = null, $db = null) {
    if ($db === null) {
        global $db;
    }
    
    if (!$db) {
        return 2.00;
    }
    
    $sql = "SELECT role FROM users WHERE id = ?";
    $stmt = $db->prepare($sql);
    if (!$stmt) {
        return 2.00;
    }
    $stmt->bind_param('i', $user_id);
    $stmt->execute();
    $result = $stmt->get_result();
    $user = $result->fetch_assoc();
    
    if (!$user) {
        return 2.00;
    }
    
    $role = $user['role'];
    
    $sql = "SELECT min_withdrawal_base FROM transaction_limits 
            WHERE (role = ? OR role IS NULL)
            ORDER BY CASE WHEN role = ? THEN 0 ELSE 1 END
            LIMIT 1";
    $stmt = $db->prepare($sql);
    if (!$stmt) {
        return 2.00;
    }
    $stmt->bind_param('ss', $role, $role);
    $stmt->execute();
    $result = $stmt->get_result();
    $limit = $result->fetch_assoc();
    
    $minWithdrawalBase = $limit ? (float)$limit['min_withdrawal_base'] : 2.00;
    
    if ($currency !== null) {
        global $fxCalculator;
        if (isset($fxCalculator) && $fxCalculator instanceof MasterFxCalculator) {
            return $fxCalculator->convert($minWithdrawalBase, 'USD', $currency);
        }
    }
    
    return $minWithdrawalBase;
}


/**
 * Get daily deposit limit for a user based on their role
 * 
 * @param int $user_id User ID
 * @param mysqli|null $db Database connection
 * @return float Daily deposit limit (0 = no limit)
 */
function getDailyDepositLimitForUser($user_id, $db = null) {
    if ($db === null) {
        global $db;
    }
    
    if (!$db) {
        return 0;
    }
    
    $sql = "SELECT role FROM users WHERE id = ?";
    $stmt = $db->prepare($sql);
    if (!$stmt) {
        return 0;
    }
    $stmt->bind_param('i', $user_id);
    $stmt->execute();
    $result = $stmt->get_result();
    $user = $result->fetch_assoc();
    
    if (!$user) {
        return 0;
    }
    
    $role = $user['role'];
    
    $sql = "SELECT daily_deposit_limit_base FROM transaction_limits WHERE role = ?";
    $stmt = $db->prepare($sql);
    if (!$stmt) {
        return 0;
    }
    $stmt->bind_param('s', $role);
    $stmt->execute();
    $result = $stmt->get_result();
    $limit = $result->fetch_assoc();
    
    return $limit ? (float)$limit['daily_deposit_limit_base'] : 0;
}



/**
 * Get daily withdrawal limit for a user based on their role
 * CORRECTED: Uses 'daily_withdrawal_limit_base' column
 * 
 * @param int $user_id User ID
 * @param string|null $currency Currency to return the amount in
 * @param mysqli|null $db Database connection
 * @return float Daily withdrawal limit (0 = no limit)
 */
function getDailyWithdrawalLimitForUser($user_id, $currency = null, $db = null) {
    if ($db === null) {
        global $db;
    }
    
    if (!$db) {
        return 0;
    }
    
    $sql = "SELECT role FROM users WHERE id = ?";
    $stmt = $db->prepare($sql);
    if (!$stmt) {
        return 0;
    }
    $stmt->bind_param('i', $user_id);
    $stmt->execute();
    $result = $stmt->get_result();
    $user = $result->fetch_assoc();
    
    if (!$user) {
        return 0;
    }
    
    $role = $user['role'];
    
    // CORRECTED: Use 'daily_withdrawal_limit_base' column
    $sql = "SELECT daily_withdrawal_limit_base FROM transaction_limits 
            WHERE (role = ? OR role IS NULL)
            ORDER BY CASE WHEN role = ? THEN 0 ELSE 1 END
            LIMIT 1";
    $stmt = $db->prepare($sql);
    if (!$stmt) {
        return 0;
    }
    $stmt->bind_param('ss', $role, $role);
    $stmt->execute();
    $result = $stmt->get_result();
    $limit = $result->fetch_assoc();
    
    $dailyLimitBase = $limit ? (float)$limit['daily_withdrawal_limit_base'] : 0;
    
    if ($currency !== null && $dailyLimitBase > 0) {
        global $fxCalculator;
        if (isset($fxCalculator) && $fxCalculator instanceof MasterFxCalculator) {
            return $fxCalculator->convert($dailyLimitBase, 'USD', $currency);
        }
    }
    
    return $dailyLimitBase;
}



/**
 * Get formatted minimum deposit string for display
 * 
 * @param int $user_id User ID
 * @param string $userCurrency User's currency code
 * @param mysqli|null $db Database connection
 * @return string Formatted minimum deposit string
 */
function getFormattedMinimumDeposit($user_id, $userCurrency, $db = null) {
    if ($db === null) {
        global $db;
    }
    
    global $fxCalculator;
    
    $minInBase = getMinimumDepositForUser($user_id, null, $db);
    $minInUserCurrency = $fxCalculator->convert($minInBase, 'USD', $userCurrency);
    
    return $fxCalculator->formatAmount($minInUserCurrency, $userCurrency);
}





/**
 * Get remaining daily deposit allowance in system base currency
 * 
 * @param int $user_id User ID
 * @param mysqli|null $db Database connection
 * @return float Remaining daily deposit amount in system base currency
 */
function getRemainingDailyDepositAllowance($user_id, $db = null) {
    if ($db === null) {
        global $db;
    }
    
    if (!$db) {
        return 0;
    }
    
    $dailyLimit = getDailyDepositLimitForUser($user_id, $db);
    
    // If no daily limit, return a large number
    if ($dailyLimit <= 0) {
        return 99999999.00;
    }
    
    // Get today's total deposits (in system base currency)
    $sql = "SELECT COALESCE(SUM(gross_amount_base_curr), 0) as today_deposits 
            FROM all_transactions 
            WHERE user_id = ? 
            AND transaction_type = 'credit' 
            AND DATE(date_created) = CURDATE()
            AND status IN ('pending', 'processing', 'successful')";
    $stmt = $db->prepare($sql);
    if (!$stmt) {
        return $dailyLimit;
    }
    $stmt->bind_param('i', $user_id);
    $stmt->execute();
    $result = $stmt->get_result();
    $row = $result->fetch_assoc();
    
    $todayDeposits = (float)($row['today_deposits'] ?? 0);
    
    return max(0, $dailyLimit - $todayDeposits);
}<br />
<b>Warning</b>:  http_response_code(): Cannot set response code - headers already sent (output started at /home/globalw1/public_html/gigz/app/Helpers/currency_helpers_DEPRECATED.php:1) in <b>/home/globalw1/public_html/gigz/app/Core/Router.php</b> on line <b>328</b><br />
<h1>404 - Page Not Found</h1><h3>Debug Information:</h3><pre>Message: No route matched for: /assets/images/logo.svg
Request Method: GET
Request URI: /assets/images/logo.svg
Script Name: /gigz/public/index.php
Base Path: /gigz/public

Loaded Routes:
  GET: /test-route
  GET: /
  GET: /home
  GET: /login
  GET: /register
  GET: /logout
  GET: /forgot-password
  GET: /reset-password
  GET: /verify
  GET: /faq
  GET: /contact
  GET: /about
  GET: /terms
  GET: /privacy
  GET: /dashboard/wallets
  GET: /dashboard
  GET: /dashboard/profile
  GET: /dashboard/transactions
  GET: /dashboard/deposit
  GET: /dashboard/withdraw
  GET: /dashboard/referrals
  GET: /dashboard/analytics
  GET: /dashboard/security
  GET: /dashboard/settings
  GET: /dashboard/kyc
  GET: /dashboard/bank-accounts
  GET: /dashboard/notifications
  GET: /dashboard/support
  GET: /dashboard/rewards
  GET: /dashboard/api-keys
  GET: /dashboard/available-content
  GET: /dashboard/content
  GET: /dashboard/earnings
  GET: /dashboard/transfer
  GET: /dashboard/currency-change
  GET: /dashboard/deposit-complete
  GET: /dashboard/pending-deposits
  GET: /dashboard/publisher
  GET: /dashboard/sharer
  GET: /dashboard/buyer
  GET: /dashboard/seller
  GET: /dashboard/generic
  GET: /dashboard/ajax/get_notifications
  GET: /dashboard/ajax/get_transaction
  GET: /dashboard/ajax/get_payment_proof
  GET: /admin/login
  GET: /admin/logout
  GET: /admin/profile
  GET: /admin
  GET: /admin/dashboard
  GET: /admin/users
  GET: /admin/user-detail
  GET: /admin/user-edit
  GET: /admin/user-wallets
  GET: /admin/transactions
  GET: /admin/transactions-detail
  GET: /admin/deposits
  GET: /admin/deposit-confirm
  GET: /admin/withdrawals
  GET: /admin/withdrawal-approve
  GET: /admin/kyc
  GET: /admin/kyc-review
  GET: /admin/referrals
  GET: /admin/reports
  GET: /admin/settings
  GET: /admin/fees-management
  GET: /admin/audit-log
  GET: /admin/system-health
  GET: /admin/system-alerts
  GET: /admin/partners
  GET: /admin/partner-payouts
  GET: /admin/admins
  GET: /admin/create-admin
  GET: /admin/edit-admin
  GET: /admin/edit-partner
  GET: /admin/content
  GET: /admin/content-edit
  GET: /admin/content-preview
  GET: /admin/fx-profits
  GET: /admin/debug
  GET: /admin/export/transactions
  GET: /admin/export/fx-profits
  GET: /admin/export/users
  GET: /admin/export/referrals
  GET: /admin/export/content
  GET: /admin/export/deposits
  GET: /admin/export/withdrawals
  GET: /admin/export/audit-log
  GET: /admin/export/partner-payouts
  GET: /admin/ajax/get_transaction_admin
  GET: /admin/ajax/get_audit_detail
  GET: /admin/ajax/get_kyc_document
  GET: /admin/ajax/get_content
  GET: /admin/ajax/get_user
  GET: /admin/ajax/get_stats
  GET: /admin/ajax/check_currency_integrity
  GET: /admin/cron/backup
  GET: /admin/cron/cleanup
  GET: /admin/cron/expire
  GET: /admin/cron/notify
  GET: /admin/cron/process_queue
  GET: /admin/cron/process_referrals
  GET: /admin/cron/queue
  GET: /admin/cron/reports
  GET: /admin/cron/update_rates
  GET: /dashboard/products
  GET: /dashboard/upgrade
  GET: /dashboard/store
  GET: /dashboard/orders
  GET: /dashboard/wishlist
  GET: /dashboard/add-product
  GET: /dashboard/orders-seller
  GET: /dashboard/sales
  GET: /dashboard/my-shares
  GET: /dashboard/deposit-confirm
  GET: /admin/currency-management
  GET: /dashboard/deposit-bank-transfer
  GET: /dashboard/ajax/get_bank_details
  GET: /admin/payment-methods
  GET: /admin/bank-details
  GET: /admin/payment-proofs
  GET: /admin/admin_currency_management
  GET: /admin/admin_fees_management
  GET: /admin/ajax/get_payment_proof
  GET: /admin/dynamic-user-wallets
  GET: /ajax/get_dynamic_variables
  GET: /admin/ajax/get_dynamic_variables
  GET: /dashboard/ajax/get_dynamic_variables
  GET: /dashboard/ajax/calculate_withdrawal
  GET: /debug-fees
  GET: /receipt
  GET: /admin/test-currency
  POST: /login
  POST: /register
  POST: /forgot-password
  POST: /reset-password
  POST: /contact
  POST: /dashboard/profile
  POST: /dashboard/currency-change
  POST: /dashboard/kyc
  POST: /dashboard/bank-accounts
  POST: /dashboard/ajax/add_bank_account
  POST: /dashboard/ajax/set_primary_bank
  POST: /dashboard/ajax/delete_bank_account
  POST: /dashboard/ajax/calculate_deposit
  POST: /dashboard/ajax/calculate_withdrawal
  POST: /dashboard/ajax/confirm_payment
  POST: /dashboard/ajax/process_withdrawal
  POST: /dashboard/ajax/upload_kyc
  POST: /dashboard/ajax/currency_change
  POST: /dashboard/ajax/delete_account
  POST: /dashboard/ajax/generate_2fa_secret
  POST: /dashboard/ajax/regenerate_backup_codes
  POST: /dashboard/ajax/get_transaction.php
  POST: /dashboard/ajax/get_transaction
  POST: /dashboard/ajax/get_payment_proof
  POST: /admin/login
  POST: /admin/profile
  POST: /admin/dashboard
  POST: /admin/users
  POST: /admin/user-edit
  POST: /admin/user-wallets
  POST: /admin/transactions
  POST: /admin/deposits
  POST: /admin/deposit-confirm
  POST: /admin/withdrawals
  POST: /admin/withdrawal-approve
  POST: /admin/kyc
  POST: /admin/kyc-review
  POST: /admin/referrals
  POST: /admin/reports
  POST: /admin/settings
  POST: /admin/fees-management
  POST: /admin/audit-log
  POST: /admin/system-health
  POST: /admin/system-alerts
  POST: /admin/partners
  POST: /admin/partner-payouts
  POST: /admin/admins
  POST: /admin/create-admin
  POST: /admin/edit-admin
  POST: /admin/edit-partner
  POST: /admin/content
  POST: /admin/content-edit
  POST: /admin/fx-profits
  POST: /admin/debug
  POST: /admin/ajax/adjust_wallet
  POST: /admin/ajax/approve_withdrawal
  POST: /admin/ajax/confirm_deposit
  POST: /admin/ajax/verify_kyc
  POST: /admin/ajax/delete_user
  POST: /admin/ajax/delete_admin
  POST: /admin/ajax/toggle_user_status
  POST: /admin/ajax/reset_user_password
  POST: /admin/ajax/clear_cache
  POST: /admin/ajax/run_cron
  POST: /admin/ajax/process_partner_payout
  POST: /admin/ajax/calculate_partner_payout
  POST: /admin/ajax/reverse_transaction
  POST: /admin/ajax/sync_currency_data
  POST: /admin/currency-management
  POST: /dashboard/deposit-confirm
  POST: /dashboard/deposit-bank-transfer
  POST: /dashboard/deposit-complete
  POST: /admin/payment-methods
  POST: /admin/bank-details
  POST: /admin/payment-proofs
  POST: /admin/admin_currency_management
  POST: /admin/admin_fees_management
  POST: /admin/ajax/confirm_payment_proof
  POST: /admin/ajax/reject_payment_proof
  POST: /admin/ajax/reject_deposit
  POST: /admin/ajax/adjust_wallet_dynamic
  POST: /admin/dynamic-user-wallets
  POST: /ajax/get_dynamic_variables
  POST: /admin/ajax/get_dynamic_variables
  POST: /dashboard/ajax/get_dynamic_variables
  POST: /ajax/save-browser-timezone
</pre>