// Tiny modal helper. Registers a single document-level Esc + backdrop-click
// handler so individual modals don't have to. Public API: openModal(id) /
// closeModal(id) / closeAllModals().
"use strict";

let bound = false;

function bindGlobal() {
    if (bound) return;
    bound = true;
    document.addEventListener("keydown", e => {
        if (e.key === "Escape") closeAllModals();
    });
    document.addEventListener("click", e => {
        // Backdrop click closes the topmost open modal.
        const backdrop = e.target.closest(".modal-backdrop");
        if (backdrop) closeModal(backdrop.parentElement.id);
        const closeBtn = e.target.closest(".modal-close");
        if (closeBtn) closeModal(closeBtn.closest(".modal").id);
    });
}

export function openModal(id) {
    bindGlobal();
    const m = document.getElementById(id);
    if (!m) return;
    m.hidden = false;
    document.body.classList.add("modal-open");
    // Focus first input/button for keyboard users.
    setTimeout(() => {
        const focusable = m.querySelector("input, button:not(.modal-close), select, textarea");
        focusable?.focus();
    }, 50);
}

export function closeModal(id) {
    const m = document.getElementById(id);
    if (!m) return;
    m.hidden = true;
    if (!document.querySelector(".modal:not([hidden])")) {
        document.body.classList.remove("modal-open");
    }
}

export function closeAllModals() {
    document.querySelectorAll(".modal:not([hidden])").forEach(m => m.hidden = true);
    document.body.classList.remove("modal-open");
}

/// Wires `data-open-modal="someId"` on any element to opening the modal.
export function setupModalTriggers() {
    bindGlobal();
    document.addEventListener("click", e => {
        const trigger = e.target.closest("[data-open-modal]");
        if (trigger) openModal(trigger.getAttribute("data-open-modal"));
    });
}