<?php
    require('../.hta_config/conf.php');

    if ($_SERVER['REQUEST_METHOD'] === 'POST' && !empty($_GET['customerId'])) {
        try {
            $db = new PDO("mysql:host=$mariaServer;dbname=$mariaDb", $mariaUser, $mariaPass);
            $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

            $totalAmount = $_POST['totalAmount'];
            $tenure = $_POST['tenure'];
            $frequency = $_POST['frequency'];
            $bookingDate = $_POST['bookingDate'];
            $paymentMode = $_POST['paymentMode'];
            $salesAgent = $_POST['salesAgent'];
            $adminNote = $_POST['adminNote'];
            $invoiceId = $_POST['invoiceId'];
            $customerName = $_POST['customerName'];
            $customerAddress = $_POST['customerAddress'];
            $marketingAgents = $_POST['marketingAgent'];
            $marketingAgentList = implode(", ", $marketingAgents);
            $item = $_POST['item'];
            $description = $_POST['description'];
            $quantity = $_POST['quantity'];
            $rate = $_POST['rate'];
            $discount = $_POST['discount'];
            $discountAmount = $_POST['discountAmount'];


            // EMI Calculation
            $emiAmount = round($totalAmount / $tenure, 2);
            $outstandingAmount = $totalAmount;
            $emiDate = new DateTime($bookingDate); // Set initial date

            // $stmt = $db->prepare("INSERT INTO emi (customerId, emiNumber, emiAmount, emiDate, totalAmount, outstanding, tenure, frequency, bookingDate, invoiceId) VALUES (:customerId, :emiNumber, :emiAmount, :emiDate, :totalAmount, :outstanding, :tenure, :frequency, :bookingDate, :invoiceId)");
            // for ($i = 1; $i <= $tenure; $i++) {
            //     $outstandingAmount -= $emiAmount;
            //     $emiDateFormatted = $emiDate->format('Y-m-d');
            //     $stmt->bindParam(':customerId', $_GET['customerId']);
            //     $stmt->bindParam(':emiNumber', $i);
            //     $stmt->bindParam(':emiAmount', $emiAmount);
            //     $stmt->bindParam(':emiDate', $emiDateFormatted);
            //     $stmt->bindParam(':totalAmount', $totalAmount);
            //     $stmt->bindParam(':outstanding', $outstandingAmount);
            //     $stmt->bindParam(':tenure', $tenure);
            //     $stmt->bindParam(':frequency', $frequency);
            //     $stmt->bindParam(':bookingDate', $bookingDate);
            //     $stmt->bindParam(':invoiceId', $invoiceId);
            //     $stmt->execute();
            //     // Move to the next EMI date
            //     if (trim(strtolower($frequency)) === 'weekly') {
            //         $emiDate->modify('+1 week');
            //     } elseif (trim(strtolower($frequency)) === 'monthly') {
            //         $emiDate->modify('+1 month');
            //     }
            // }

            // Insert into invoice table
            $stmt2 = $db->prepare("UPDATE invoice SET customerName = :customerName, address = :address, frequency = :frequency, invoiceDate = :invoiceDate, paymentMode = :paymentMode, salesAgent = :salesAgent, marketingAgent = :marketingAgent, tenure = :tenure, item = :item, description = :description, qty = :qty, rate = :rate, discount = :discount, totalAmount = :totalAmount, adminNote = :adminNote, discount = :discount WHERE customerId = :customerId AND invoiceId = :invoiceId");
            $stmt2->bindParam(':customerId', $_GET['customerId']);
            $stmt2->bindParam(':invoiceId', $invoiceId);
            $stmt2->bindParam(':customerName', $customerName);
            $stmt2->bindParam(':address', $customerAddress);
            $stmt2->bindParam(':frequency', $frequency);
            $stmt2->bindParam(':invoiceDate', $bookingDate);
            $stmt2->bindParam(':paymentMode', $paymentMode);
            $stmt2->bindParam(':salesAgent', $salesAgent);
            $stmt2->bindParam(':marketingAgent', $marketingAgentList);
            $stmt2->bindParam(':tenure', $tenure);
            $stmt2->bindParam(':item', $item);
            $stmt2->bindParam(':description', $description);
            $stmt2->bindParam(':qty', $quantity);
            $stmt2->bindParam(':rate', $rate);
            $stmt2->bindParam(':discount', $discount);
            $stmt2->bindParam(':totalAmount', $totalAmount);
            $stmt2->bindParam(':adminNote', $adminNote);
            $stmt2->bindParam(':discountAmount', $discountAmount);
            $stmt2->execute();
            echo '<div class="alert alert-success">New EMI Plan Saved Successfully!</div>';
            echo '<script>
                document.addEventListener("DOMContentLoaded", function() {
                    document.getElementById("printBtn").classList.remove("visually-hidden");
                });
            </script>';
        } catch (PDOException $e) {
            echo '<div class="alert alert-danger">Error: ' . $e->getMessage() . '</div>';
        }
    }
    $invoiceData = null;
    if (!empty($_GET['customerId'])) {
        try {
            $db = new PDO("mysql:host=$mariaServer;dbname=$mariaDb", $mariaUser, $mariaPass);
            $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

            $stmt = $db->prepare("SELECT * FROM invoice WHERE customerId = :customerId");
            $stmt->bindParam(':customerId', $_GET['customerId']);
            $stmt->execute();
            $invoiceData = $stmt->fetch(PDO::FETCH_ASSOC);
            $invoiceDate = date('Y-m-d', strtotime($invoiceData['invoiceDate']));
        } catch (PDOException $e) {
            echo '<div class="alert alert-danger">Error: ' . $e->getMessage() . '</div>';
        }
    }
?>


<div class="container mt-4">
    <h4>Create New Invoice</h4>
    <hr>
    <form method="POST">
        <div class="d-flex justify-content-between gap-4">
            <div class="w-100">
                <div class="mb-3">
                    <label for="invoiceId" class="form-label">Invoice Id:</label>
                    <input type="text" class="form-control bg-white" id="invoiceId" name="invoiceId" value="<?= $invoiceData['invoiceId']; ?>">
                </div>
                <div class="mb-3">
                    <label for="name" class="form-label">Customer:</label>
                    <input readonly type="text" class="form-control bg-white" id="customerName" name="customerName" value="<?= htmlspecialchars($invoiceData['customerName']); ?>">
                </div>
                <div class="mb-3">
                    <label for="address" class="form-label">Address:</label>
                    <input id="address" readonly name="customerAddress" class="form-control bg-white" type="text" value="<?= htmlspecialchars($invoiceData['address']); ?>">
                </div>

                <div class="mb-3">
                    <label for="frequency" class="form-label">Frequency:</label>
                    <select name="frequency" class="form-control" required>
                        <option value="">-Select-</option>
                        <option value="Weekly" <?php echo ($invoiceData['frequency'] === 'Weekly') ? 'selected' : ''; ?>>Weekly</option>
                        <option value="Monthly" <?php echo ($invoiceData['frequency'] === 'Monthly') ? 'selected' : ''; ?>>Monthly</option>
                    </select>
                </div>
                <div class="d-flex w-100 gap-2">
                    <div class="mb-3 w-100">
                        <label for="bookingDate" class="form-label">Invoice Date:</label>
                        <input type="date" class="form-control" id="bookingDate" name="bookingDate" value="<?= htmlspecialchars($invoiceDate); ?>" required>
                    </div>
                </div>
            </div>
            <div class="w-100">
                <div class="mb-3">
                    <label for="paymentMode" class="form-label">Payment Methods:</label>
                    <select name="paymentMode" class="form-control"required>
                        <option value="">-Select-</option>
                        <?php
                            $paymentModes = ["Stripe", "Zelle", "Bank Transfer", "Cheque", "Other"];
                            foreach ($paymentModes as $mode) {
                                $selected = ($invoiceData['paymentMode'] === $mode) ? 'selected' : '';
                                echo "<option value=\"$mode\" $selected>$mode</option>";
                            }
                        ?>
                    </select>
                </div>
                <div class="mb-3">
                    <label for="salesAgent" class="form-label">Sales Agent:</label>
                    <select name="salesAgent" class="form-control"required>
                        <option value="">-Select-</option>
                            <?php
                                $salesAgentOptions = ["Prabhat Mishra", "Suvojit Mishra"];
                                foreach ($salesAgentOptions as $salesAgentItems) {
                                    $selected = ($invoiceData['salesAgent'] === $salesAgentItems) ? 'selected' : '';
                                    echo "<option value=\"$salesAgentItems\" $selected>$salesAgentItems</option>";
                                }
                            ?>
                    </select>
                </div>
                <div class="mb-3">
                    <label for="marketingAgent" class="form-label">Marketing Agent:</label>
                    <select name="marketingAgent[]" class="form-control" required multiple>
                        <?php
                            $marketingAgents = ["Prabhat Mishra", "Suvojit Mishra", "Aditya Sarkar", "Suvankar Sarkar"];
                            $selectedAgents = isset($invoiceData['marketingAgent']) && !empty($invoiceData['marketingAgent']) ? explode(',', $invoiceData['marketingAgent']) : [];
                            foreach ($marketingAgents as $agent) {
                                $selected = in_array(trim($agent), array_map('trim', $selectedAgents)) ? 'selected' : '';
                                echo "<option value=\"$agent\" $selected>$agent</option>";
                            }
                        ?>
                    </select>
                </div>
                <?php
                    $tenureOptions = [ "1" => "One Time","3" => "3","6" => "6","9" => "9","12" => "12","0" => "Custom" ];
                    $selectedTenure = $invoiceData['tenure'] ?? ''; // Get selected tenure value
                ?>

                <div class="mb-3">
                    <label for="tenure" class="form-label">Total Cycles:</label>
                    <select onchange="changeTenureField();" id="tenureAuto" name="tenure" class="form-control" required>
                        <option value="">-Select-</option>
                        <?php
                        foreach ($tenureOptions as $value => $label) {
                            $selected = ($selectedTenure == $value) ? 'selected' : '';
                            echo "<option value=\"$value\" $selected>$label</option>";
                        }
                        ?>
                    </select>
                    <input type="text" name="tenure" id="tenureCustom" class="form-control visually-hidden" 
                        placeholder="Enter custom value" disabled onblur="restoreDropdown(this)" />
                </div>

                <div class="mb-3">
                    <label for="adminNote" class="form-label">Admin Note:</label>
                    <textarea class="form-control" name="adminNote" id="adminNote" cols="30" rows="4"><?= htmlspecialchars($invoiceData['adminNote']); ?></textarea>
                </div>
            </div>
        </div>
        <div>
            <table class="w-100">
                <thead>
                    <tr class="bg-secondary text-white">
                        <th class="p-2">Item</th>
                        <th class="p-2">Description</th>
                        <th class="p-2">Qty</th>
                        <th class="p-2">Rate</th>
                        <th class="p-2">Tax % </th>
                        <th class="p-2">Tax Amount</th>
                        <th class="p-2">Amount</th>
                    </tr>
                </thead>
                <tbody>
                    <tr>
                        <td>
                            <input type="text" class="form-control w-100" name="item" id="item" value="<?= htmlspecialchars($invoiceData['item']); ?>" />
                        </td>
                        <td>
                        <input type="text" class="form-control w-100" name="description" id="description" value="<?= htmlspecialchars($invoiceData['description']); ?>"/>
                        </td>
                        <td>
                            <input class="form-control w-100" name="quantity" id="quantity" value="<?= htmlspecialchars($invoiceData['qty']); ?>"/>
                        </td>
                        <td>
                            <input class="form-control w-100" name="rate" id="rate" value="<?= htmlspecialchars($invoiceData['rate']); ?>"/>
                        </td>
                        <td>
                            <select name="discount" id="discount" class="form-control">
                                <option value="0">No Discount</option>
                                <?php
                                    $discountOptions = ["5", "10", "12", "18"];
                                    foreach ($discountOptions as $discountItems) {
                                        $selected = ($invoiceData['discount'] === $discountItems) ? 'selected' : '';
                                        echo "<option value=\"$discountItems\" $selected> $discountItems%</option>";
                                    }
                                ?>
                            </select>
                        </td>
                        <td>
                            <input readonly class="form-control" name="discountAmount" id="discountAmount" value="<?= htmlspecialchars($invoiceData['discountAmount']); ?>" />
                        </td>
                        <td>
                            <input readonly class="form-control" name="totalAmount" id="totalAmount" value="<?= htmlspecialchars($invoiceData['totalAmount']); ?>"/>
                        </td>
                    </tr>
                </tbody>
            </table>
        </div>
        <div class="d-flex justify-content-end align-items-center">
            <div>
                <button class="btn btn-secondary">Discard</button>
                <button type="submit" class="btn btn-primary">Save</button>
                <a href="/customers/print-invoice/?customerId=<?= $_GET['customerId'] . '&invoiceId='. $_GET['invoiceId']; ?>" id="printBtn" class="btn btn-primary visually-">Print Invoice</a>
            </div>
        </div>
        
    </form>
</div>
<script>   
    function changeTenureField() {
        const tenureAuto = document.getElementById('tenureAuto');
        const tenureCustom = document.getElementById('tenureCustom');

        if (tenureAuto.value === "0") { 
            tenureAuto.classList.add('visually-hidden');
            tenureAuto.setAttribute('disabled', 'true'); 
            tenureAuto.removeAttribute('name'); 

            tenureCustom.classList.remove('visually-hidden');
            tenureCustom.removeAttribute('disabled'); 
            tenureCustom.setAttribute('name', 'tenure'); 
            tenureCustom.focus();
        }
    }

    function restoreDropdown(input) {
        const tenureAuto = document.getElementById('tenureAuto');

        if (input.value.trim() === "") { 
            tenureAuto.classList.remove('visually-hidden');
            tenureAuto.removeAttribute('disabled'); 
            tenureAuto.setAttribute('name', 'tenure'); 
            tenureAuto.value = ""; // Reset dropdown selection

            input.classList.add('visually-hidden');
            input.setAttribute('disabled', 'true'); 
            input.removeAttribute('name'); 
            input.value = ""; // Clear input value
        } else {
            tenureAuto.value = "0"; // Ensure dropdown remains on "Custom" if input has a value
        }
    }

    document.addEventListener("DOMContentLoaded", function () {
        const quantityInput = document.getElementById("quantity");
        const rateInput = document.getElementById("rate");
        const taxSelect = document.getElementById("discount");
        const taxAmountInput = document.getElementById("discountAmount");
        const totalAmountInput = document.getElementById("totalAmount");

        function calculateTotal() {
            const quantity = parseFloat(quantityInput.value) || 0;
            const rate = parseFloat(rateInput.value) || 0;
            const tax = parseFloat(taxSelect.value) || 0;

            let subtotal = quantity * rate;
            let taxAmount = (subtotal * tax) / 100;
            let grandTotal = subtotal - taxAmount;

            taxAmountInput.value = taxAmount.toFixed(2); // Format Tax Amount
            totalAmountInput.value = grandTotal.toFixed(2); // Format Total Amount
        }

        // Event listeners for real-time calculation
        quantityInput.addEventListener("input", calculateTotal);
        rateInput.addEventListener("input", calculateTotal);
        taxSelect.addEventListener("change", calculateTotal);
    });


</script>

<!-- cust_67c9925ff14f4834489101 -->
<!-- CB03252 -->