/* global window, document, localStorage */

const $ = selector => Array.from(document.querySelectorAll(selector));
const $$ = selector => Array.from(document.querySelector(selector));

(() => {
  "use strict";

  /**
   * Initialize the theme toggle button functionality.
   * Toggles between 'dark' and 'light' themes and persists the state in localStorage.
   */
  function initThemeToggle() {
    const themeToggleButton = document.getElementById("theme-toggle-btn");
    if (!themeToggleButton) return;
    themeToggleButton.classList.toggle("btn-ghost", !("theme" in localStorage));
    themeToggleButton.addEventListener("click", () => {
      const documentRoot = document.documentElement;
      const isSystemTheme = themeToggleButton.classList.contains("btn-ghost");
      const isDarkTheme = documentRoot.classList.contains("dark");
      const newTheme = isSystemTheme ? "dark" : (isDarkTheme ? "light" : "system");

      if (newTheme === "system") {
        documentRoot.classList.toggle("dark", window.matchMedia("(prefers-color-scheme: dark)").matches);
        documentRoot.setAttribute("data-theme", window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light");
        localStorage.removeItem("theme");
      } else {
        if (newTheme === "light") {
          documentRoot.classList.remove("dark");
        } else if (newTheme === "dark") {
          documentRoot.classList.add("dark");
        }
        documentRoot.setAttribute("data-theme", newTheme);
        localStorage.setItem("theme", newTheme);
      }
      themeToggleButton.classList.toggle("btn-ghost", newTheme === "system");
    });
  }

  /**
   * Initialize event listeners for forms containing multiselect fields.
   * When the form is submitted, process each 'card-multiselect' to create hidden inputs.
   */
  function initCardMultiselectHandling() {
    const forms = document.querySelectorAll("form");
    forms.forEach(form => {
      if (form.querySelector("select.card-multiselect")) {
        form.addEventListener("submit", () => {
          processMultiselectForm(form);
        });
      }
    });
  }

  /**
   * Process multiselect fields within a form before submission by:
   *  - Creating hidden inputs for each selected option with value in 'card_id:quantity' format.
   *  - Removing the original name attribute to avoid duplicate submissions.
   *
   * @param {HTMLFormElement} form - The form element to process.
   */
  function processMultiselectForm(form) {
    const multiselectFields = form.querySelectorAll("select.card-multiselect");
    multiselectFields.forEach(selectField => {
      const originalFieldName =
        selectField.getAttribute("data-original-name") || selectField.getAttribute("name");
      if (!originalFieldName) return;
      selectField.setAttribute("data-original-name", originalFieldName);

      // Remove any previously generated hidden inputs for this multiselect.
      form
        .querySelectorAll(`input[data-generated-for-card-multiselect="${originalFieldName}"]`)
        .forEach(input => input.remove());

      // For each selected option, create a hidden input.
      selectField.querySelectorAll("option:checked").forEach(option => {
        const cardId = option.value;
        const quantity = option.getAttribute("data-quantity") || "1";
        const hiddenInput = document.createElement("input");
        hiddenInput.type = "hidden";
        hiddenInput.name = originalFieldName;
        hiddenInput.value = `${cardId}:${quantity}`;
        hiddenInput.setAttribute("data-generated-for-card-multiselect", originalFieldName);
        form.appendChild(hiddenInput);
      });

      // Prevent the browser from submitting the select field directly.
      selectField.removeAttribute("name");
    });
  }

  /**
   * Reset stale selections in all card multiselect fields.
   * This is triggered on the window's 'pageshow' event to clear any lingering selections.
   */
  function resetCardMultiselectState() {
    const multiselectFields = document.querySelectorAll("select.card-multiselect");
    multiselectFields.forEach(selectField => {
      // Deselect all options.
      selectField.querySelectorAll("option").forEach(option => {
        option.selected = false;
      });

      // If the select field has an associated Choices.js instance, clear its selection.
      if (selectField.choicesInstance) {
        const activeSelections = selectField.choicesInstance.getValue(true);
        if (activeSelections.length > 0) {
          selectField.choicesInstance.removeActiveItemsByValue(activeSelections);
        }
        selectField.choicesInstance.setValue([]);
      }
    });
  }

  // On DOMContentLoaded, initialize theme toggling and form processing.
  document.addEventListener("DOMContentLoaded", () => {
    initThemeToggle();
    initCardMultiselectHandling();
  });

  // On pageshow, only reset multiselect state if the page was loaded from bfcache.
  window.addEventListener("pageshow", function(event) {
    if (event.persisted) {
      resetCardMultiselectState();
    }
  });

  // Expose tradeOfferCard globally if not already defined.
  if (!window.tradeOfferCard) {
    window.tradeOfferCard = function() {
      return {
        flipped: false,
        show_back: false,
        collapsed: false,
        /*
         * flipWithCollapse() now applies the height transition directly on the visible card face.
         * It measures the current face (front or back) and the target face's height,
         * then animates the current face's height change before toggling the flip.
         *
         * Make sure your template markup includes:
         *   - x-ref="front" on the front card face
         *   - x-ref="back" on the back card face
         */
        flipWithCollapse() {
          // Determine the currently visible face and the target face.
          const currentFace = this.flipped ? this.$refs.back : this.$refs.front;
          const targetFace = this.flipped ? this.$refs.front : this.$refs.back;
          const container = this.$refs.container;
    
          // Temporarily force target face to display to measure its height.
          const originalHeight = targetFace.style.height;
          const originalDisplay = targetFace.style.display;
          const originalPosition = targetFace.style.position;
          const originalVisibility = targetFace.style.visibility;
          targetFace.style.height = 'auto';
          targetFace.style.display = 'block';
          targetFace.style.position = 'absolute';
          targetFace.style.visibility = 'hidden';
          const targetHeight = targetFace.offsetHeight + 18;
          targetFace.style.height = originalHeight;
          targetFace.style.display = originalDisplay;
          targetFace.style.position = originalPosition;
          targetFace.style.visibility = originalVisibility;

          container.setAttribute('x-collapse.duration.500ms.min.' + targetHeight + 'px', '');
          this.collapsed = true;
          setTimeout(() => {
            this.show_back = this.flipped;
            this.flipped = !this.flipped;
            setTimeout(() => {
              this.show_back = !this.show_back;
            }, 250)
            setTimeout(() => { 
              this.collapsed = false;
              setTimeout(() => {
                container.removeAttribute('x-collapse.duration.500ms.min.' + targetHeight + 'px');
              }, 550);
            }, 550);
          }, 550);
        }
      }
    };
  }
})();