// terminal-readers.js
// Powers the Company Settings "Card Readers" tab: registering, listing, and deactivating Stripe
// Terminal readers, plus saving the in-person surcharge toggle. Loaded only when the company has an
// active Stripe Connect account.
(function () {
    'use strict';

    function token() {
        var el = document.querySelector('input[name="__RequestVerificationToken"]');
        return el ? el.value : '';
    }

    function notifyOk(msg) {
        if (typeof showSuccess === 'function') showSuccess(msg); else console.log(msg);
    }
    function notifyErr(msg) {
        if (typeof showError === 'function') showError(msg); else console.error(msg);
    }

    function post(url, data) {
        return fetch(url, {
            method: 'POST',
            headers: {
                'RequestVerificationToken': token(),
                'Content-Type': 'application/x-www-form-urlencoded'
            },
            body: new URLSearchParams(data)
        }).then(function (r) { return r.json(); });
    }

    var tableBody = document.getElementById('readersTableBody');
    var registerBtn = document.getElementById('registerReaderBtn');
    var saveSettingsBtn = document.getElementById('saveTerminalSettingsBtn');
    var loaded = false;

    function escapeHtml(s) {
        return (s || '').replace(/[&<>"']/g, function (c) {
            return { '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }[c];
        });
    }

    function renderReaders(readers) {
        if (!readers || readers.length === 0) {
            tableBody.innerHTML = '<tr><td colspan="5" class="text-muted small">No readers registered yet.</td></tr>';
            return;
        }
        tableBody.innerHTML = readers.map(function (r) {
            var net = r.networkStatus
                ? '<span class="badge bg-' + (r.networkStatus === 'online' ? 'success' : 'secondary') + '">' + escapeHtml(r.networkStatus) + '</span>'
                : '<span class="text-muted small">&mdash;</span>';
            return '<tr>' +
                '<td>' + escapeHtml(r.label) + '</td>' +
                '<td class="small text-muted">' + escapeHtml(r.deviceType) + '</td>' +
                '<td class="small text-muted">' + escapeHtml(r.serialNumber || '&mdash;') + '</td>' +
                '<td>' + net + '</td>' +
                '<td class="text-end"><button type="button" class="btn btn-outline-danger btn-sm" data-reader-id="' + r.id + '">' +
                '<i class="bi bi-trash"></i></button></td>' +
                '</tr>';
        }).join('');
    }

    function loadReaders() {
        fetch('/Terminal/ListReaders', { headers: { 'RequestVerificationToken': token() } })
            .then(function (r) { return r.json(); })
            .then(function (res) {
                if (res.success) renderReaders(res.readers);
                else tableBody.innerHTML = '<tr><td colspan="5" class="text-danger small">Could not load readers.</td></tr>';
            })
            .catch(function () {
                tableBody.innerHTML = '<tr><td colspan="5" class="text-danger small">Could not load readers.</td></tr>';
            });
    }

    if (registerBtn) {
        registerBtn.addEventListener('click', function () {
            var code = document.getElementById('readerRegCode').value.trim();
            var label = document.getElementById('readerLabel').value.trim();
            if (!code || !label) { notifyErr('Enter both a registration code and a label.'); return; }

            registerBtn.disabled = true;
            post('/Terminal/RegisterReader', { registrationCode: code, label: label }).then(function (res) {
                registerBtn.disabled = false;
                if (res.success) {
                    notifyOk('Reader registered.');
                    document.getElementById('readerRegCode').value = '';
                    document.getElementById('readerLabel').value = '';
                    loadReaders();
                } else {
                    notifyErr(res.error || 'Could not register the reader.');
                }
            }).catch(function () {
                registerBtn.disabled = false;
                notifyErr('Could not register the reader.');
            });
        });
    }

    // Deactivate (event delegation on the table body).
    if (tableBody) {
        tableBody.addEventListener('click', function (e) {
            var btn = e.target.closest('button[data-reader-id]');
            if (!btn) return;
            if (!confirm('Remove this reader? You can register it again later.')) return;
            btn.disabled = true;
            post('/Terminal/DeactivateReader', { id: btn.dataset.readerId }).then(function (res) {
                if (res.success) { notifyOk('Reader removed.'); loadReaders(); }
                else { btn.disabled = false; notifyErr(res.error || 'Could not remove the reader.'); }
            });
        });
    }

    if (saveSettingsBtn) {
        saveSettingsBtn.addEventListener('click', function () {
            var enabled = document.getElementById('terminalSurchargeEnabled').checked;
            post('/Terminal/UpdateTerminalSettings', { surchargeEnabled: enabled }).then(function (res) {
                if (res.success) notifyOk('Reader settings saved.');
                else notifyErr(res.error || 'Could not save settings.');
            });
        });
    }

    // Lazy-load the readers list the first time the tab is shown.
    var tabBtn = document.getElementById('card-readers-tab');
    if (tabBtn) {
        tabBtn.addEventListener('shown.bs.tab', function () {
            if (!loaded) { loadReaders(); loaded = true; }
        });
    }
})();