/**
 * Reset-to-default for site role mapping and feature-access matrix (admin settings).
 *
 * @package    mod_meetletacbmarketplace
 * @copyright  2026 MeetLet
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
(function () {
    'use strict';

    var modalState = {
        open: false,
        resolve: null,
        lastFocus: null,
        onKey: null,
        mode: 'confirm',
        pendingSection: null,
    };

    function modalScroll() {
        return window.MeetletModalScroll || {
            lock: function () {},
            unlock: function () {},
            focusNoScroll: function (el) {
                if (el && typeof el.focus === 'function') {
                    el.focus();
                }
            },
        };
    }

    function byId(id) {
        return document.getElementById(id);
    }

    function parseStrings(root) {
        if (!root) {
            return {};
        }
        try {
            return JSON.parse(root.getAttribute('data-strings') || '{}') || {};
        } catch (e) {
            return {};
        }
    }

    function sectionContainer(section) {
        if (section === 'rolemapping') {
            return document.querySelector('[data-meetlet-rolemapping]');
        }
        if (section === 'featureaccess') {
            return document.querySelector('[data-meetlet-access-matrix]');
        }
        return null;
    }

    function applyRoleMatrix(container, matrix) {
        if (!container || !matrix) {
            return;
        }
        Object.keys(matrix).forEach(function (rowkey) {
            var row = container.querySelector('[data-role-row="' + rowkey + '"]');
            if (!row) {
                return;
            }
            var val = matrix[rowkey];
            var radio = row.querySelector('input[type="radio"][value="' + val + '"]');
            if (radio) {
                radio.checked = true;
            }
        });
    }

    function applyFeatureMatrix(container, matrix) {
        if (!container || !matrix) {
            return;
        }
        container.querySelectorAll('.meetlet-access-check').forEach(function (cb) {
            var role = cb.getAttribute('data-role');
            var feature = cb.getAttribute('data-feature');
            var on = matrix[role] && matrix[role][feature];
            cb.checked = !!on;
        });
    }

    function renderModalMessage(bodyEl, mode, message) {
        if (!bodyEl) {
            return;
        }
        bodyEl.textContent = '';
        if (mode === 'busy') {
            var wrap = document.createElement('div');
            wrap.className = 'meetlet-modal__busy';
            var spinner = document.createElement('div');
            spinner.className = 'meetlet-modal__spinner';
            spinner.setAttribute('aria-hidden', 'true');
            var text = document.createElement('p');
            text.className = 'meetlet-modal__lead';
            text.textContent = message || '';
            wrap.appendChild(spinner);
            wrap.appendChild(text);
            bodyEl.appendChild(wrap);
            return;
        }
        var lead = document.createElement('p');
        lead.className = 'meetlet-modal__lead';
        lead.textContent = message || '';
        bodyEl.appendChild(lead);
    }

    function closeModal(confirmed) {
        var modal = byId('meetlet-access-reset-modal');
        if (!modal || !modalState.open) {
            return;
        }
        modal.setAttribute('hidden', 'hidden');
        modal.style.display = 'none';
        modal.classList.remove('is-busy');
        modal.setAttribute('aria-busy', 'false');
        modalState.open = false;
        modalScroll().unlock();
        if (modalState.onKey) {
            document.removeEventListener('keydown', modalState.onKey, true);
            modalState.onKey = null;
        }
        var resolve = modalState.resolve;
        modalState.resolve = null;
        modalState.pendingSection = null;
        if (resolve) {
            resolve(!!confirmed);
        }
        if (modalState.lastFocus && typeof modalState.lastFocus.focus === 'function') {
            modalScroll().focusNoScroll(modalState.lastFocus);
        }
        modalState.lastFocus = null;
    }

    function openModal(opts) {
        opts = opts || {};
        var mode = opts.mode === 'alert' ? 'alert' : (opts.mode === 'busy' ? 'busy' : 'confirm');
        var modal = byId('meetlet-access-reset-modal');
        if (!modal) {
            return Promise.resolve(false);
        }

        if (modalState.open) {
            if (modalState.mode === 'busy' && mode === 'alert') {
                modalState.resolve = null;
            } else {
                closeModal(false);
            }
        }

        var str = opts.strings || {};
        var titleEl = byId('meetlet-access-reset-modal-title');
        var bodyEl = byId('meetlet-access-reset-modal-body');
        var confirmBtn = byId('meetlet-access-reset-modal-confirm');
        var cancelBtn = modal.querySelector('[data-meetlet-modal-dismiss].btn');
        var closeBtn = modal.querySelector('.meetlet-modal__close');

        if (titleEl) {
            titleEl.textContent = opts.title || '';
        }
        renderModalMessage(bodyEl, mode, opts.message || '');
        modal.classList.toggle('is-busy', mode === 'busy');
        modal.setAttribute('aria-busy', mode === 'busy' ? 'true' : 'false');

        if (confirmBtn) {
            confirmBtn.textContent = opts.confirmLabel || (mode === 'alert' ? (str.modal_ok || 'OK') : (str.confirm_reset || 'Reset'));
            confirmBtn.className = opts.confirmClass || (mode === 'alert' ? 'btn btn-primary' : 'btn btn-outline-danger');
            confirmBtn.hidden = mode === 'busy';
            confirmBtn.disabled = mode === 'busy';
            confirmBtn.style.display = mode === 'busy' ? 'none' : '';
        }
        if (cancelBtn) {
            cancelBtn.textContent = str.modal_cancel || 'Cancel';
            cancelBtn.hidden = mode !== 'confirm';
            cancelBtn.style.display = mode !== 'confirm' ? 'none' : '';
        }
        if (closeBtn) {
            if (str.modal_close) {
                closeBtn.setAttribute('aria-label', str.modal_close);
            }
            closeBtn.hidden = mode === 'busy';
            closeBtn.style.display = mode === 'busy' ? 'none' : '';
        }

        var dir = document.documentElement.getAttribute('dir') || 'ltr';
        modal.setAttribute('dir', dir);
        var dialog = modal.querySelector('.meetlet-modal__dialog');
        if (dialog) {
            dialog.setAttribute('dir', dir);
        }

        modalState.mode = mode;
        if (!modalState.lastFocus) {
            modalState.lastFocus = document.activeElement;
        }
        modalScroll().lock();
        modal.removeAttribute('hidden');
        modal.style.display = 'flex';
        modalState.open = true;

        if (modalState.onKey) {
            document.removeEventListener('keydown', modalState.onKey, true);
        }
        modalState.onKey = function (e) {
            if (!modalState.open) {
                return;
            }
            if (e.key === 'Escape') {
                if (modalState.mode === 'busy') {
                    e.preventDefault();
                    e.stopPropagation();
                    return;
                }
                e.preventDefault();
                e.stopPropagation();
                closeModal(false);
                return;
            }
            if (e.key !== 'Tab' || modalState.mode === 'busy') {
                return;
            }
            var focusable = modal.querySelectorAll(
                'button:not([disabled]):not([hidden]), [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
            );
            var visible = [];
            for (var i = 0; i < focusable.length; i++) {
                if (focusable[i].style.display === 'none') {
                    continue;
                }
                visible.push(focusable[i]);
            }
            if (!visible.length) {
                return;
            }
            var first = visible[0];
            var last = visible[visible.length - 1];
            if (e.shiftKey && document.activeElement === first) {
                e.preventDefault();
                modalScroll().focusNoScroll(last);
            } else if (!e.shiftKey && document.activeElement === last) {
                e.preventDefault();
                modalScroll().focusNoScroll(first);
            }
        };
        document.addEventListener('keydown', modalState.onKey, true);

        if (mode !== 'busy' && confirmBtn && !confirmBtn.hidden) {
            window.setTimeout(function () {
                modalScroll().focusNoScroll(confirmBtn);
            }, 20);
        }

        if (mode === 'busy') {
            modalState.resolve = null;
            return Promise.resolve(true);
        }

        return new Promise(function (resolve) {
            modalState.resolve = resolve;
        });
    }

    function bindModal() {
        var modal = byId('meetlet-access-reset-modal');
        if (!modal || modal.dataset.bound === '1') {
            return;
        }
        modal.dataset.bound = '1';
        modal.addEventListener('click', function (e) {
            if (modalState.mode === 'busy') {
                e.preventDefault();
                return;
            }
            if (e.target.closest('[data-meetlet-modal-dismiss]')) {
                e.preventDefault();
                closeModal(false);
            }
        });
        var confirmBtn = byId('meetlet-access-reset-modal-confirm');
        if (confirmBtn) {
            confirmBtn.addEventListener('click', function (e) {
                e.preventDefault();
                if (modalState.mode === 'busy') {
                    return;
                }
                closeModal(true);
            });
        }
    }

    function postReset(root, section, str) {
        var endpoint = root.getAttribute('data-endpoint') || '';
        var sesskey = root.getAttribute('data-sesskey') || '';
        if (!endpoint || !sesskey) {
            return Promise.reject(new Error(str.error || 'Error'));
        }
        var url = endpoint + (endpoint.indexOf('?') >= 0 ? '&' : '?') +
            'sesskey=' + encodeURIComponent(sesskey) +
            '&section=' + encodeURIComponent(section);
        return fetch(url, {
            method: 'POST',
            credentials: 'same-origin',
            headers: {
                'Accept': 'application/json',
            },
        }).then(function (resp) {
            return resp.json();
        });
    }

    function confirmCopy(section, str) {
        if (section === 'rolemapping') {
            return {
                title: str.confirm_rolemapping_title || '',
                message: str.confirm_rolemapping || '',
            };
        }
        return {
            title: str.confirm_featureaccess_title || '',
            message: str.confirm_featureaccess || '',
        };
    }

    function successCopy(section, str, serverMessage) {
        if (serverMessage) {
            return serverMessage;
        }
        if (section === 'rolemapping') {
            return str.success_rolemapping || '';
        }
        return str.success_featureaccess || '';
    }

    function handleResetClick(btn, root, str) {
        var section = btn.getAttribute('data-meetlet-reset-section') || '';
        if (!section) {
            return;
        }
        var copy = confirmCopy(section, str);
        openModal({
            mode: 'confirm',
            strings: str,
            title: copy.title,
            message: copy.message,
            confirmClass: 'btn btn-outline-danger',
        }).then(function (confirmed) {
            if (!confirmed) {
                return;
            }
            openModal({
                mode: 'busy',
                strings: str,
                title: str.busy || '',
                message: str.busy || '',
            });
            btn.disabled = true;
            postReset(root, section, str).then(function (data) {
                btn.disabled = false;
                if (!data || !data.success) {
                    openModal({
                        mode: 'alert',
                        strings: str,
                        title: str.error || 'Error',
                        message: (data && data.error) || str.error || 'Error',
                        confirmClass: 'btn btn-primary',
                    });
                    return;
                }
                var container = sectionContainer(section);
                if (section === 'rolemapping') {
                    applyRoleMatrix(container, data.matrix);
                } else {
                    applyFeatureMatrix(container, data.matrix);
                }
                openModal({
                    mode: 'alert',
                    strings: str,
                    title: copy.title,
                    message: successCopy(section, str, data.message),
                    confirmClass: 'btn btn-primary',
                });
            }).catch(function () {
                btn.disabled = false;
                openModal({
                    mode: 'alert',
                    strings: str,
                    title: str.error || 'Error',
                    message: str.error || 'Error',
                    confirmClass: 'btn btn-primary',
                });
            });
        });
    }

    function init() {
        var root = byId('meetlet-access-reset-root');
        if (!root) {
            return;
        }
        var str = parseStrings(root);
        bindModal();
        document.addEventListener('click', function (e) {
            var btn = e.target.closest('[data-meetlet-reset-section]');
            if (!btn || btn.disabled) {
                return;
            }
            e.preventDefault();
            handleResetClick(btn, root, str);
        });
    }

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }
})();