/* global Module, MM, NCCFormatDuration */

Module.register("MMM-NextcloudCookbook", {
  defaults: {
    controlPath: "/MMM-NextcloudCookbook/control",
    controlUrl: "",
    animationSpeed: 400,
    shareUrl: "",
    sharePassword: ""
  },

  start() {
    this.state = { active: false, recipe: null, error: null };
    this.hiddenModules = false;
    window.addEventListener("resize", () => this.scheduleRecipeFit());
    this.sendSocketNotification("CONFIG", this.config);
  },

  getStyles() {
    return ["MMM-NextcloudCookbook.css"];
  },

  getScripts() {
    return [this.file("lib/format-duration.js")];
  },

  socketNotificationReceived(notification, payload) {
    if (notification !== "STATE") return;
    this.state = payload;
    this.setRecipeMode(Boolean(payload.active));
    this.updateDom(this.config.animationSpeed);
  },

  notificationReceived(notification) {
    if (notification === "MODULE_DOM_UPDATED") this.scheduleRecipeFit();
  },

  scheduleRecipeFit() {
    window.requestAnimationFrame(() => this.fitRecipe());
  },

  fitRecipe() {
    const root = document.getElementById(this.identifier)?.querySelector(".ncc-active");
    const recipe = root?.querySelector(".ncc-recipe");
    if (!root || !recipe) return;

    const style = window.getComputedStyle(root);
    const availableHeight = root.clientHeight
      - Number.parseFloat(style.paddingTop)
      - Number.parseFloat(style.paddingBottom);
    const availableWidth = root.clientWidth
      - Number.parseFloat(style.paddingLeft)
      - Number.parseFloat(style.paddingRight);
    let minimum = 0.45;
    let maximum = 2;
    let best = minimum;

    for (let attempt = 0; attempt < 12; attempt++) {
      const scale = (minimum + maximum) / 2;
      root.style.setProperty("--ncc-type-scale", scale);
      const fits = recipe.scrollHeight <= availableHeight
        && recipe.scrollWidth <= availableWidth;
      if (fits) {
        best = scale;
        minimum = scale;
      } else {
        maximum = scale;
      }
    }
    root.style.setProperty("--ncc-type-scale", best.toFixed(3));
  },

  setRecipeMode(active) {
    if (active && !this.hiddenModules) {
      MM.getModules().exceptModule(this).enumerate((module) => {
        module.hide(this.config.animationSpeed, { lockString: this.name });
      });
      this.hiddenModules = true;
    } else if (!active && this.hiddenModules) {
      MM.getModules().exceptModule(this).enumerate((module) => {
        module.show(this.config.animationSpeed, { lockString: this.name });
      });
      this.hiddenModules = false;
    }
  },

  getDom() {
    const root = document.createElement("section");
    root.className = this.state.active
      ? "ncc-root ncc-active"
      : "ncc-root ncc-idle";

    const qr = document.createElement("a");
    qr.className = "ncc-qr";
    qr.href = this.config.controlUrl || this.config.controlPath;
    qr.setAttribute("aria-label", "Open recipe controller");
    const qrLabel = document.createElement("span");
    qrLabel.textContent = "Recipe mode control:";
    const qrImage = document.createElement("img");
    qrImage.src = "/MMM-NextcloudCookbook/qr.svg";
    qrImage.alt = "Recipe controller QR code";
    qr.append(qrLabel, qrImage);
    root.appendChild(qr);

    if (!this.state.active) return root;

    if (this.state.error) {
      const error = document.createElement("p");
      error.className = "ncc-error";
      error.textContent = this.state.error;
      root.appendChild(error);
      return root;
    }

    if (!this.state.recipe) {
      const loading = document.createElement("p");
      loading.className = "ncc-loading";
      loading.textContent = "Loading recipe…";
      root.appendChild(loading);
      return root;
    }

    root.appendChild(this.renderRecipe(this.state.recipe));
    return root;
  },

  renderRecipe(recipe) {
    const article = document.createElement("article");
    article.className = "ncc-recipe";

    const header = document.createElement("header");
    const title = document.createElement("h1");
    title.textContent = recipe.name || "Untitled recipe";
    header.appendChild(title);

    const metadata = [
      ["Yield", recipe.recipeYield],
      ["Prep", NCCFormatDuration(recipe.prepTime)],
      ["Cook", NCCFormatDuration(recipe.cookTime)],
      ["Total", NCCFormatDuration(recipe.totalTime)]
    ].filter(([, value]) => value);
    if (metadata.length) {
      const list = document.createElement("dl");
      list.className = "ncc-meta";
      metadata.forEach(([label, value]) => {
        const term = document.createElement("dt");
        term.textContent = label;
        const detail = document.createElement("dd");
        detail.textContent = value;
        list.append(term, detail);
      });
      header.appendChild(list);
    }
    article.appendChild(header);

    const columns = document.createElement("div");
    columns.className = "ncc-columns";

    const ingredients = document.createElement("section");
    const ingredientsTitle = document.createElement("h2");
    ingredientsTitle.textContent = "Ingredients";
    ingredients.appendChild(ingredientsTitle);
    const ingredientList = document.createElement("ul");
    (recipe.recipeIngredient || []).forEach((ingredient) => {
      const item = document.createElement("li");
      item.textContent = ingredient;
      ingredientList.appendChild(item);
    });
    ingredients.appendChild(ingredientList);

    const instructions = document.createElement("section");
    const instructionsTitle = document.createElement("h2");
    instructionsTitle.textContent = "Instructions";
    instructions.appendChild(instructionsTitle);
    const instructionList = document.createElement("ol");
    this.flattenInstructions(recipe.recipeInstructions || []).forEach((step) => {
      const item = document.createElement("li");
      item.textContent = step;
      instructionList.appendChild(item);
    });
    instructions.appendChild(instructionList);

    columns.append(ingredients, instructions);
    article.appendChild(columns);
    return article;
  },

  flattenInstructions(instructions) {
    return instructions.flatMap((instruction) => {
      if (typeof instruction === "string") return [instruction];
      if (Array.isArray(instruction.itemListElement)) {
        return this.flattenInstructions(instruction.itemListElement);
      }
      return instruction.text ? [instruction.text] : [];
    });
  }
});