// shadowdarklings-importer.js
Hooks.once("ready", function () {
  // Add button to Actors Directory
  Hooks.on("renderActorDirectory", (app, html, data) => {
    appendImportButton(html, app, "actor");
  });
  // Add button to Items Directory
  Hooks.on("renderItemDirectory", (app, html, data) => {
    appendImportButton(html, app, "item");
  });
});

function appendImportButton(html, app, type) {
  const importBtn = $(
    `<button class="shadowdarklings-importer"><i class="fas fa-file-import"></i> Shadowdarklings Import</button>`
  );
  importBtn.on("click", async () => {
    const dialog = new ShadowdarklingsImportDialog(type, app);
    dialog.render(true);
  });
  html.find(".directory-footer").append(importBtn);
}

// Upload dialog
class ShadowdarklingsImportDialog extends Dialog {
  constructor(type, app) {
    super({
      title: `Import Shadowdarklings ${type === "actor" ? "Character/Monster" : "Item"}`,
      content: `
        <form>
          <div class="form-group">
            <label>Upload Shadowdarklings JSON:</label>
            <input type="file" name="json" accept="application/json"/>
          </div>
        </form>
      `,
      buttons: {
        import: {
          icon: '<i class="fas fa-file-import"></i>',
          label: "Import",
          callback: (html) => this.importJSON(html)
        },
        cancel: {
          icon: '<i class="fas fa-times"></i>',
          label: "Cancel"
        }
      },
      default: "import"
    });
    this.type = type;
    this.app = app;
  }

  async importJSON(html) {
    const file = html.find('input[name="json"]')[0]?.files[0];
    if (!file) {
      ui.notifications.error("No file selected!");
      return;
    }
    let json;
    try {
      json = JSON.parse(await file.text());
    } catch (err) {
      ui.notifications.error("Invalid JSON file.");
      return;
    }

    if (this.type === "actor") {
      return importShadowdarklingsActor(json, this.app);
    } else {
      return importShadowdarklingsItem(json, this.app);
    }
  }
}

// Main actor importer
async function importShadowdarklingsActor(data, app) {
  // Use system-defined actor types: 'pc' (player), 'npc' (monsters/opponents)
  // Try to discern if this is a PC or NPC/Monster.
  let actorType = "npc";
  // If class or level is present, it's likely a PC
  if (data.class || data.level || data.background || data.player) actorType = "pc";

  // Allowed actor types
  const allowedTypes = game.system.model.Actor ? Object.keys(game.system.model.Actor) : ["pc","npc"];
  if (!allowedTypes.includes(actorType)) actorType = allowedTypes[0]; // Fallback

  // Setup the document data
  const actorData = {
    name: data.name || "Imported Character",
    type: actorType,
    system: {
      abilities: {
        str: { value: data.str },
        dex: { value: data.dex },
        int: { value: data.int },
        wis: { value: data.wis },
        con: { value: data.con },
        cha: { value: data.cha }
      },
      ac: { value: data.ac },
      hp: { value: data.hp, max: data.hp || data.maxHp, min: 0 },
      level: { value: data.level },
      class: { value: data.class },
      ancestry: { value: data.race },
      alignment: { value: data.alignment }
      // Extend as needed for your Shadowdark system version
    },
    // Optionally add image
    // img: data.img || "icons/svg/mystery-man.svg"
  };

  // Try inventory import (if system supports embedded items in actors)
  if (Array.isArray(data.inventory)) {
    actorData.items = data.inventory.filter(i=>i.name).map(itm => ({
      name: itm.name,
      type: "equipment", // Or "gear" or your actual item type in Shadowdark
      system: {
        description: { value: itm.description || "" },
        quantity: itm.quantity || 1,
        value: itm.value || "",
        weight: itm.weight || ""
      }
    }));
  }

  // Create the actor using v12 Documents API
  try {
    const created = await Actor.createDocuments([actorData], {parent: game.actors});
    ui.notifications.info(`${actorData.name} imported successfully!`);
    // Optionally, highlight/select the imported actor
    if (created.length && app) {
      app._lastSelected = [created[0].id];
      app.render();
    }
  } catch (e) {
    console.error(e);
    ui.notifications.error("Actor import failed.");
  }
}

// Items (single or list)
async function importShadowdarklingsItem(data, app) {
  // Accept single or array of items
  const items = Array.isArray(data) ? data : [data];
  let created = [];
  for (let itm of items) {
    if (!itm.name) continue;
    const itemData = {
      name: itm.name,
      type: itm.type || "equipment", // Check your Shadowdark item types!
      system: {
        description: { value: itm.description || "" },
        quantity: itm.quantity || 1
      }
    };
    try {
      const docs = await Item.createDocuments([itemData], {parent: game.items});
      created.push(...docs);
    } catch (e) {
      console.error(e);
      ui.notifications.warn(`Failed to import item: ${itm.name}`);
    }
  }
  if (created.length > 0) ui.notifications.info("Items imported.");
}