/**
 * Based on Battle INF item handler http:// pastebin.com/N8yf8QYb
 */

/*global ScriptAPI, API, items*/
(function (ScriptAPI, API, items) {
  'use strict';

  var rarityToGrind = 5, // This rarity & lower is merged & sold
    raritiesToSave = [5, 6], // These rarities are merged with exactly matching items
    rarityToSell = 0, // This rarity & lower is simply sold if it has no other use
    defaultTimeout = 60, // Timeout for notifications
    allowAging = 3, // 1 ages inventory, 2 ages equipped items, 3 ages both
    showNotifications = [false, true, false, false, true]; // [ grind, save, sell, keep, watch ]

  function getInventory() { // Get inventory items
    return ScriptAPI.$user.inventory.items;
  }

  function getEquipment() { // Get equipped items
    return ScriptAPI.$user.character.equipment;
  }

  function showSummary(item, showPlus) { // Show a summary of an item
    var parts = [
      '\ud83c\udfe0' + item.mod, // Area
      '\u2606' + item.rarity, // Rarity
      item.name // Name
    ];

    if (showPlus) {
      parts.push('+' + item.plus);
    }

    return parts.join(' ');
  }

  function notify(message, timeout) { // Create a notification
    API.notifications.create(message, timeout || defaultTimeout);
  }

  function watch(item) { // Determine the best values for items
    var key = 'best',
      data = localStorage.getItem(key),
      stats = item.original ? item.original.stats : item.stats,
      filteredStats = {},
      isBest = false,
      maxKey,
      i;

    data = data ? JSON.parse(data) : {};

    if (!data.hasOwnProperty(item.mod)) {
      data[item.mod] = {};
    }

    if (!data[item.mod].hasOwnProperty(item.rarity)) {
      data[item.mod][item.rarity] = {};
    }

    if (!data[item.mod][item.rarity].hasOwnProperty(item.name)) {
      data[item.mod][item.rarity][item.name] = {};
    }

    for (i in stats) {
      if (stats.hasOwnProperty(i)) {
        if (stats[i] > 0) {
          filteredStats[i] = stats[i];

          if (!maxKey || stats[i] > stats[maxKey]) {
            maxKey = i;
          }
        }
      }
    }

    if (!data[item.mod][item.rarity][item.name].hasOwnProperty(maxKey) || stats[maxKey] >= data[item.mod][item.rarity][item.name][maxKey]) {
      isBest = true;

      for (i in filteredStats) {
        if (filteredStats.hasOwnProperty(i)) {
          data[item.mod][item.rarity][item.name][i] = filteredStats[i];
        }
      }
    }

    localStorage.setItem(key, JSON.stringify(data));

    if (isBest && item.rarity >= 6 && showNotifications[4]) {
      notify('\ud83d\udc4d ' + showSummary(item) + ' (' + filteredStats[maxKey] + ')');
      console.log(showSummary(item), filteredStats);
    }

    return isBest && filteredStats;
  }

  function sell(item) { // Sell an item
    if (showNotifications[2]) {
      notify('\u2604 ' + showSummary(item));
    }

    ScriptAPI.$userService.sellItem(item); // Sell item

    return true;
  }

  function keep(item) { // Keep an item
    if (showNotifications[3]) {
      notify('\u2764 ' + showSummary(item));
    }

    return true;
  }

  function craft(primary, secondary, option) { // Craft items
    var tmp;

    if (primary.ts > secondary.ts) { // Ensures primary is older than secondary
      tmp = primary;
      primary = secondary;
      secondary = tmp;
    }

    if (primary.rarity < secondary.rarity) { // Ensures primary is rarer than secondary
      tmp = primary;
      primary = secondary;
      secondary = tmp;
    }

    // Notify
    if (option === 1 && showNotifications[0]) {
      notify('\u267A ' + showSummary(primary) + ' \u2190 ' + showSummary(secondary));
    }

    if (option === 2 && showNotifications[1]) {
      notify('\u2726 ' + showSummary(primary, true) + ' \u2190 ' + showSummary(secondary, true));
    }

    ScriptAPI.$craftingService.craftItems(primary, secondary); // Craft item
    return primary;
  }

  function grind(item) { // Grind item with another in inventory
    var items = getInventory(),
      i;

    for (i = 0; i < items.length; i++) {
      if ((items[i] !== item) && (items[i].rarity <= rarityToGrind) && !items[i].lock) {
        ScriptAPI.$userService.sellItem(craft(items[i], item, 1)); // Grind items & sell result
        return true;
      }
    }
  }

  function merge(item) { // Merge with a similar item in inventory or equipped
    var items = getInventory().concat(getEquipment()),
      i;

    for (i = 0; i < items.length; i++) {
      if ((items[i] !== item) && (items[i].rarity === item.rarity) && (items[i].name === item.name) && (items[i].mod === item.mod) && (items[i].plus + item.plus < (5 * item.rarity + 5)) && !items[i].lock) {
        craft(items[i], item, 2); // Merge items
        return true;
      }
    }
  }

  function aging(setting) {
    var items,
      i;

    if (setting === 1) { // Age items in inventory
      items = getInventory();
    } else if (setting === 2) { // Age equipped items
      items = getEquipment();
    } else if (setting === 3) { // Age all items
      items = getEquipment().concat(getInventory());
    }

    if (items) {
      for (i = 0; i < items.length; i++) {
        ScriptAPI.$craftingService.ageUpItem(items[i]);
      }
    }
  }

  // Handle new item
  items.forEach(function (item) {
    var isDone = false;

    // Check if this item is the best possible item for its type
    watch(item);

    // Checks if item meets requirements for merging
    if (raritiesToSave.indexOf(item.rarity) >= 0) {
      isDone = merge(item);
    }

    // Check if item meets requirements for grinding
    if (!isDone && item.rarity <= rarityToGrind) {
      isDone = grind(item);
    }

    // Checks if item meets requirements for selling
    if (!isDone && (item.rarity <= rarityToSell)) {
      isDone = sell(item);
    }

    // If no function has been run, item will be kept
    if (!isDone) {
      isDone = keep(item);
    }
  });

  // Triggers item aging function
  if (allowAging > 0) {
    aging(allowAging);
  }
}(ScriptAPI, API, items));