@extends('layouts.app')

@section('title', 'Create Payment Schedule')

@section('content')
<div class="container-fluid">
    <!-- Page Header -->
    <div class="row mb-4">
        <div class="col-12">
            <div class="d-flex justify-content-between align-items-center">
                <div>
                    <h1 class="h3 mb-0 text-gray-800">
                        <i class="fas fa-plus mr-2"></i>Create Payment Schedule
                    </h1>
                    <nav aria-label="breadcrumb">
                        <ol class="breadcrumb">
                            <li class="breadcrumb-item"><a href="{{ route('reseller.payment-schedules.index') }}">Payment Schedules</a></li>
                            <li class="breadcrumb-item active">Create</li>
                        </ol>
                    </nav>
                </div>
                <div>
                    <a href="{{ route('reseller.payment-schedules.index') }}" class="btn btn-secondary">
                        <i class="fas fa-arrow-left mr-2"></i>Back
                    </a>
                </div>
            </div>
        </div>
    </div>

    @if($errors->any())
        <div class="alert alert-danger alert-dismissible fade show" role="alert">
            <i class="fas fa-exclamation-circle mr-2"></i>
            <ul class="mb-0">
                @foreach($errors->all() as $error)
                    <li>{{ $error }}</li>
                @endforeach
            </ul>
            <button type="button" class="close" data-dismiss="alert">
                <span>&times;</span>
            </button>
        </div>
    @endif

    <div class="card">
        <div class="card-body">
            <form method="POST" action="{{ route('reseller.payment-schedules.store') }}">
                @csrf
                
                <div class="row">
                    <div class="col-md-6 mb-3">
                        <label for="provider_id" class="form-label">Provider <span class="text-danger">*</span></label>
                        <select name="provider_id" id="provider_id" class="form-control" required onchange="loadInvoicesForProvider(this.value)">
                            <option value="">Select Provider</option>
                            @foreach($providers as $provider)
                                <option value="{{ $provider->id }}" 
                                        data-total-due="{{ $provider->total_due ?? 0 }}"
                                        {{ old('provider_id', $selectedProviderId) == $provider->id ? 'selected' : '' }}>
                                    {{ $provider->company_name ?? $provider->name }} 
                                    @if(($provider->total_due ?? 0) > 0)
                                        (Total Due: BDT {{ number_format($provider->total_due, 2) }})
                                    @endif
                                </option>
                            @endforeach
                        </select>
                        @error('provider_id')
                            <span class="text-danger small">{{ $message }}</span>
                        @enderror
                    </div>
                    
                    <div class="col-md-6 mb-3">
                        <label for="invoice_id" class="form-label">Invoice</label>
                        <select name="invoice_id" id="invoice_id" class="form-control">
                            <option value="">Select Invoice (Optional)</option>
                            @foreach($invoices as $invoice)
                                <option value="{{ $invoice->id }}" 
                                        data-provider-id="{{ $invoice->provider_id }}"
                                        data-due-amount="{{ $invoice->due_amount }}"
                                        {{ old('invoice_id', $selectedInvoiceId) == $invoice->id ? 'selected' : '' }}
                                        style="display: none;">
                                    {{ $invoice->bill_no ?? 'Invoice #' . $invoice->id }} - Due: BDT {{ number_format($invoice->due_amount, 2) }}
                                </option>
                            @endforeach
                        </select>
                        @error('invoice_id')
                            <span class="text-danger small">{{ $message }}</span>
                        @enderror
                    </div>
                    
                    <div class="col-md-12 mb-3">
                        <div class="d-flex justify-content-between align-items-center mb-2">
                            <label class="form-label mb-0">Payment Schedule Entries <span class="text-danger">*</span></label>
                            <button type="button" class="btn btn-sm btn-success" id="addScheduleRow">
                                <i class="fas fa-plus mr-1"></i>Add Row
                            </button>
                        </div>
                        <div id="scheduleRowsContainer">
                            <div class="schedule-row border rounded p-3 mb-3" data-row-index="0">
                                <div class="row">
                                    <div class="col-md-2 mb-2">
                                        <label class="small mb-1">Due Date <span class="text-danger">*</span></label>
                                        <input type="date" name="schedules[0][due_date]" class="form-control schedule-due-date" value="{{ old('schedules.0.due_date', date('Y-m-d')) }}" required>
                                    </div>
                                    <div class="col-md-2 mb-2">
                                        <label class="small mb-1">Amount</label>
                                        <input type="text" class="form-control" value="0.00" readonly style="background:#f0f0f0;" id="display_amount_0">
                                        <input type="hidden" name="schedules[0][amount]" class="schedule-amount" value="{{ old('schedules.0.amount', 0) }}" required>
                                    </div>
                                    <div class="col-md-2 mb-2">
                                        <label class="small mb-1">Committed Amount</label>
                                        <input type="number" name="schedules[0][paid_amount]" class="form-control schedule-paid-amount" step="0.01" min="0" value="{{ old('schedules.0.paid_amount', 0) }}">
                                    </div>
                                    <div class="col-md-2 mb-2">
                                        <label class="small mb-1">Payment Status</label>
                                        <select name="schedules[0][payment_status]" class="form-control schedule-payment-status">
                                            <option value="pending" selected>Pending</option>
                                            <option value="partial">Partial</option>
                                            <option value="paid">Paid</option>
                                        </select>
                                    </div>
                                    <div class="col-md-3 mb-2">
                                        <label class="small mb-1">Notes</label>
                                        <input type="text" name="schedules[0][notes]" class="form-control" value="{{ old('schedules.0.notes') }}" placeholder="Optional notes">
                                    </div>
                                    <div class="col-md-1 mb-2 d-flex align-items-end">
                                        <button type="button" class="btn btn-sm btn-danger remove-row" style="display: none;">
                                            <i class="fas fa-times"></i>
                                        </button>
                                    </div>
                                </div>
                            </div>
                        </div>
                        @error('schedules')
                            <span class="text-danger small">{{ $message }}</span>
                        @enderror
                    </div>
                    
                </div>
                
                <div class="d-flex justify-content-end">
                    <a href="{{ route('reseller.payment-schedules.index') }}" class="btn btn-secondary mr-2">Cancel</a>
                    <button type="submit" class="btn btn-primary">
                        <i class="fas fa-save mr-2"></i>Create Schedule
                    </button>
                </div>
            </form>
        </div>
    </div>
</div>

@push('scripts')
<script>
// Store all invoice options
let allInvoiceOptions = [];

// Initialize on page load
document.addEventListener('DOMContentLoaded', function() {
    const invoiceSelect = document.getElementById('invoice_id');
    
    // Store all invoice options
    allInvoiceOptions = Array.from(invoiceSelect.querySelectorAll('option[data-provider-id]')).map(option => ({
        value: option.value,
        text: option.textContent,
        providerId: option.getAttribute('data-provider-id'),
        dueAmount: option.getAttribute('data-due-amount')
    }));
    
    // Initialize with selected provider if any
    const providerSelect = document.getElementById('provider_id');
    if (providerSelect && providerSelect.value) {
        loadInvoicesForProvider(providerSelect.value);
    }
    
    // Add change listener to invoice select for auto-fill amount in all rows
    invoiceSelect.addEventListener('change', function() {
        const selectedOption = this.options[this.selectedIndex];
        const providerSelect = document.getElementById('provider_id');
        
        if (selectedOption && selectedOption.value) {
            // If invoice is selected, use invoice's due amount
            const dueAmount = parseFloat(selectedOption.getAttribute('data-due-amount')) || 0;
            if (dueAmount > 0) {
                updateAllRowAmounts(dueAmount);
            }
        } else {
            // If invoice is cleared, use provider's total due amount
            if (providerSelect && providerSelect.value) {
                const selectedProviderOption = providerSelect.options[providerSelect.selectedIndex];
                const totalDue = parseFloat(selectedProviderOption.getAttribute('data-total-due')) || 0;
                updateAllRowAmounts(totalDue);
            } else {
                updateAllRowAmounts(0);
            }
        }
    });
});

function loadInvoicesForProvider(providerId) {
    const invoiceSelect = document.getElementById('invoice_id');
    const providerSelect = document.getElementById('provider_id');
    
    // Store current selected invoice value
    const currentInvoiceValue = invoiceSelect.value;
    
    // Clear invoice dropdown except the first option
    const firstOption = invoiceSelect.querySelector('option[value=""]');
    invoiceSelect.innerHTML = '';
    if (firstOption) {
        invoiceSelect.appendChild(firstOption.cloneNode(true));
    }
    
    if (!providerId) {
        // If no provider selected, hide all invoices and clear amount
        updateAllRowAmounts(0);
        return;
    }
    
    // Get total due amount for selected provider
    const selectedProviderOption = providerSelect.options[providerSelect.selectedIndex];
    const totalDue = parseFloat(selectedProviderOption.getAttribute('data-total-due')) || 0;
    
    // Filter and show invoices for selected provider
    allInvoiceOptions.forEach(option => {
        if (option.providerId == providerId) {
            const newOption = document.createElement('option');
            newOption.value = option.value;
            newOption.textContent = option.text;
            newOption.setAttribute('data-provider-id', option.providerId);
            newOption.setAttribute('data-due-amount', option.dueAmount);
            invoiceSelect.appendChild(newOption);
        }
    });
    
    // Restore selected invoice value if it's still available
    if (currentInvoiceValue && invoiceSelect.querySelector(`option[value="${currentInvoiceValue}"]`)) {
        invoiceSelect.value = currentInvoiceValue;
        // If invoice is selected, use invoice's due amount
        const selectedInvoiceOption = invoiceSelect.options[invoiceSelect.selectedIndex];
        const invoiceDueAmount = parseFloat(selectedInvoiceOption.getAttribute('data-due-amount')) || 0;
        if (invoiceDueAmount > 0) {
            updateAllRowAmounts(invoiceDueAmount);
        }
    } else {
        // If no invoice selected, use provider's total due amount
        invoiceSelect.value = '';
        updateAllRowAmounts(totalDue);
    }
}

// Update amount for all rows
function updateAllRowAmounts(amount) {
    const rows = document.querySelectorAll('.schedule-row');
    rows.forEach((row, index) => {
        const hiddenAmountInput = row.querySelector('.schedule-amount');
        const displayAmountInput = document.getElementById(`display_amount_${index}`);
        
        if (hiddenAmountInput) {
            hiddenAmountInput.value = amount.toFixed(2);
        }
        if (displayAmountInput) {
            displayAmountInput.value = parseFloat(amount).toLocaleString('en-US', {minimumFractionDigits: 2, maximumFractionDigits: 2});
        }
    });
}

// Update payment status for a specific row (keep as pending by default)
function updateRowPaymentStatus(rowIndex) {
    // Payment Status will remain as "Pending" by default
    // User can manually change it if needed
    const row = document.querySelector(`.schedule-row[data-row-index="${rowIndex}"]`);
    if (!row) return;
    
    const statusSelect = row.querySelector('.schedule-payment-status');
    if (statusSelect && !statusSelect.value) {
        statusSelect.value = 'pending';
    }
}

// Add new schedule row
function addScheduleRow() {
    const container = document.getElementById('scheduleRowsContainer');
    if (!container) return;
    
    const rows = container.querySelectorAll('.schedule-row');
    const nextIndex = rows.length;
    
    const newRow = document.createElement('div');
    newRow.className = 'schedule-row border rounded p-3 mb-3';
    newRow.setAttribute('data-row-index', nextIndex);
    
    // Get total due amount from provider
    const providerSelect = document.getElementById('provider_id');
    let totalDue = 0;
    if (providerSelect && providerSelect.value) {
        const selectedProviderOption = providerSelect.options[providerSelect.selectedIndex];
        totalDue = parseFloat(selectedProviderOption.getAttribute('data-total-due')) || 0;
    }
    
    newRow.innerHTML = `
        <div class="row">
            <div class="col-md-2 mb-2">
                <label class="small mb-1">Due Date <span class="text-danger">*</span></label>
                <input type="date" name="schedules[${nextIndex}][due_date]" class="form-control schedule-due-date" value="{{ date('Y-m-d') }}" required>
            </div>
            <div class="col-md-2 mb-2">
                <label class="small mb-1">Amount</label>
                <input type="text" class="form-control" value="${totalDue.toFixed(2)}" readonly style="background:#f0f0f0;" id="display_amount_${nextIndex}">
                <input type="hidden" name="schedules[${nextIndex}][amount]" class="schedule-amount" value="${totalDue.toFixed(2)}" required>
            </div>
            <div class="col-md-2 mb-2">
                <label class="small mb-1">Committed Amount</label>
                <input type="number" name="schedules[${nextIndex}][paid_amount]" class="form-control schedule-paid-amount" step="0.01" min="0" value="0">
            </div>
            <div class="col-md-2 mb-2">
                <label class="small mb-1">Payment Status</label>
                <select name="schedules[${nextIndex}][payment_status]" class="form-control schedule-payment-status">
                    <option value="pending" selected>Pending</option>
                    <option value="partial">Partial</option>
                    <option value="paid">Paid</option>
                </select>
            </div>
            <div class="col-md-3 mb-2">
                <label class="small mb-1">Notes</label>
                <input type="text" name="schedules[${nextIndex}][notes]" class="form-control" value="" placeholder="Optional notes">
            </div>
            <div class="col-md-1 mb-2 d-flex align-items-end">
                <button type="button" class="btn btn-sm btn-danger remove-row">
                    <i class="fas fa-times"></i>
                </button>
            </div>
        </div>
    `;
    
    container.appendChild(newRow);
    updateRemoveButtons();
}

// Remove schedule row
function removeScheduleRow(button) {
    const row = button.closest('.schedule-row');
    if (row) {
        row.remove();
        updateRowIndices();
        updateRemoveButtons();
    }
}

// Update row indices
function updateRowIndices() {
    const container = document.getElementById('scheduleRowsContainer');
    if (!container) return;
    
    const rows = container.querySelectorAll('.schedule-row');
    
    rows.forEach((row, index) => {
        row.setAttribute('data-row-index', index);
        const inputs = row.querySelectorAll('input, select');
        inputs.forEach(input => {
            const name = input.getAttribute('name');
            if (name && name.includes('[')) {
                const newName = name.replace(/schedules\[\d+\]/, `schedules[${index}]`);
                input.setAttribute('name', newName);
            }
        });
        
        // Update oninput attribute
        const paidAmountInput = row.querySelector('.schedule-paid-amount');
        if (paidAmountInput) {
            paidAmountInput.setAttribute('oninput', `updateRowPaymentStatus(${index})`);
        }
        
        // Update display amount input ID
        const displayAmountInput = row.querySelector('input[readonly][id^="display_amount_"]');
        if (displayAmountInput) {
            displayAmountInput.id = `display_amount_${index}`;
        }
    });
}

// Update remove buttons visibility
function updateRemoveButtons() {
    const container = document.getElementById('scheduleRowsContainer');
    if (!container) return;
    
    const rows = container.querySelectorAll('.schedule-row');
    const removeButtons = container.querySelectorAll('.remove-row');
    
    removeButtons.forEach(button => {
        button.style.display = rows.length > 1 ? 'block' : 'none';
    });
}

// Initialize row management
document.addEventListener('DOMContentLoaded', function() {
    const addBtn = document.getElementById('addScheduleRow');
    const container = document.getElementById('scheduleRowsContainer');
    
    if (addBtn) {
        addBtn.addEventListener('click', addScheduleRow);
    }
    
    if (container) {
        container.addEventListener('click', function(e) {
            if (e.target.closest('.remove-row')) {
                removeScheduleRow(e.target.closest('.remove-row'));
            }
        });
    }
    
    // Initialize remove buttons
    updateRemoveButtons();
});
</script>
@endpush
@endsection