/**
 * quote-modal.js — Quote create/edit modal
 * Uses shared item-editor for accordion items
 */
import { addItem, getItems, resetItemCounter } from '../utils/item-editor.js';
import { setDefaultDate, showSpinner, hideSpinner } from '../utils/helpers.js';

let currentQuoteId = null;

/**
 * Auto-set tax exempt based on customer's taxable flag
 */
function applyCustomerTaxStatus(customerId) {
    const allCust = window.getCustomers ? window.getCustomers() : (window.customers || []);
    const customer = allCust.find(c => c.id === parseInt(customerId));
    if (customer) {
        const cb = document.getElementById('quote-tax-exempt');
        if (cb) {
            cb.checked = (customer.taxable === false);
            updateQuoteTotals();
        }
    }
}

export function openQuoteModal(quoteId = null) {
    currentQuoteId = quoteId;

    if (quoteId) {
        loadQuoteForEdit(quoteId);
    } else {
        prepareNewQuote();
    }

    document.getElementById('quote-modal').classList.add('active');
}

export function closeQuoteModal() {
    document.getElementById('quote-modal').classList.remove('active');
    currentQuoteId = null;
}

async function loadQuoteForEdit(quoteId) {
    document.getElementById('quote-modal-title').textContent = 'Edit Quote';

    const response = await fetch(`/api/quotes/${quoteId}`);
    const data = await response.json();

    // Set customer in Alpine component
    const allCust = window.getCustomers ? window.getCustomers() : (window.customers || []);
    const customer = allCust.find(c => c.id === data.quote.customer_id);
    if (customer) {
        const customerInput = document.querySelector('#quote-modal input[placeholder="Search customer..."]');
        if (customerInput) {
            customerInput.value = customer.name;
            customerInput.dispatchEvent(new Event('input'));
            const alpineData = Alpine.$data(customerInput.closest('[x-data]'));
            if (alpineData) {
                alpineData.search = customer.name;
                alpineData.selectedId = customer.id;
                alpineData.selectedName = customer.name;
            }
        }
    }

    document.getElementById('quote-customer').value = data.quote.customer_id;
    document.getElementById('quote-date').value = data.quote.quote_date.split('T')[0];
    document.getElementById('quote-tax-exempt').checked = data.quote.tax_exempt;

    // Load items using shared editor
    document.getElementById('quote-items').innerHTML = '';
    resetItemCounter();
    data.items.forEach(item => {
        addItem('quote-items', { item, type: 'quote', onUpdate: updateQuoteTotals });
    });

    updateQuoteTotals();
}

function prepareNewQuote() {
    document.getElementById('quote-modal-title').textContent = 'New Quote';
    document.getElementById('quote-form').reset();
    document.getElementById('quote-items').innerHTML = '';
    resetItemCounter();
    setDefaultDate();

    // Add one default item
    addItem('quote-items', { type: 'quote', onUpdate: updateQuoteTotals });
}

export function addQuoteItem(item = null) {
    addItem('quote-items', { item, type: 'quote', onUpdate: updateQuoteTotals });
}

export function updateQuoteTotals() {
    const items = getItems('quote-items');
    const taxExempt = document.getElementById('quote-tax-exempt').checked;

    let subtotal = 0;
    let hasTbd = false;

    items.forEach(item => {
        if (item.rate.toUpperCase() === 'TBD' || item.amount.toUpperCase() === 'TBD') {
            hasTbd = true;
        } else {
            const amount = parseFloat(item.amount.replace(/[$,]/g, '')) || 0;
            subtotal += amount;
        }
    });

    const taxAmount = taxExempt ? 0 : (subtotal * 8.25 / 100);
    const total = subtotal + taxAmount;

    document.getElementById('quote-subtotal').textContent = `$${subtotal.toFixed(2)}`;
    document.getElementById('quote-tax').textContent = taxExempt ? '$0.00' : `$${taxAmount.toFixed(2)}`;
    document.getElementById('quote-total').textContent = hasTbd ? `$${total.toFixed(2)}*` : `$${total.toFixed(2)}`;
    document.getElementById('quote-tax-row').style.display = taxExempt ? 'none' : 'block';
}

export async function handleQuoteSubmit(e) {
    e.preventDefault();

    const items = getItems('quote-items');
    if (items.length === 0) {
        alert('Please add at least one item');
        return;
    }

    const data = {
        customer_id: parseInt(document.getElementById('quote-customer').value),
        quote_date: document.getElementById('quote-date').value,
        tax_exempt: document.getElementById('quote-tax-exempt').checked,
        items: items
    };

    try {
        const url = currentQuoteId ? `/api/quotes/${currentQuoteId}` : '/api/quotes';
        const method = currentQuoteId ? 'PUT' : 'POST';

        const response = await fetch(url, {
            method,
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(data)
        });

        if (response.ok) {
            closeQuoteModal();
            if (window.quoteView) window.quoteView.loadQuotes();
        } else {
            alert('Error saving quote');
        }
    } catch (error) {
        console.error('Error:', error);
        alert('Error saving quote');
    }
}

// Wire up form submit and tax-exempt checkbox
export function initQuoteModal() {
    const form = document.getElementById('quote-form');
    if (form) form.addEventListener('submit', handleQuoteSubmit);

    const taxExempt = document.getElementById('quote-tax-exempt');
    if (taxExempt) taxExempt.addEventListener('change', updateQuoteTotals);

    // Watch for customer selection → auto-set tax exempt (only for new quotes)
    const customerHidden = document.getElementById('quote-customer');
    if (customerHidden) {
        const observer = new MutationObserver(() => {
            if (!currentQuoteId && customerHidden.value) {
                applyCustomerTaxStatus(customerHidden.value);
            }
        });
        observer.observe(customerHidden, { attributes: true, attributeFilter: ['value'] });
    }
}

// Expose for onclick handlers
window.openQuoteModal = openQuoteModal;
window.closeQuoteModal = closeQuoteModal;
window.addQuoteItem = addQuoteItem;