/**
 * @type {{
 *   guns: [Internal.ItemStack, Internal.ItemStack][],
 *   items: Internal.ItemStack[],
 * }}
 */
var loot = { guns: [], items: [] };

/** @type {{[key: string]: number }} */
var playerKills = {};
/** @type {?string} */
var playerBoss = null;

ServerEvents.commandRegistry((event) => {
  // /enter_warzone <target>
  registerCommand(event, {
    command: "enter_warzone",
    operator: true,
    parameters: [
      {
        name: "target",
        type: event.arguments.PLAYER,
        handler: (ctx) => {
          const server = ctx.source.server;
          const player = event.arguments.PLAYER.getResult(ctx, "target");

          // Initialize scoreboards
          if (!server.persistentData.getBoolean("scoreboardsInitialized")) {
            server.runCommandSilent(
              `scoreboard objectives add warzone_kills dummy "Kills"`,
            );
            server.runCommandSilent(
              `scoreboard objectives setdisplay sidebar warzone_kills`,
            );
            server.runCommandSilent(
              `scoreboard objectives setdisplay belowName warzone_kills`,
            );
            server.runCommandSilent(
              `scoreboard objectives add warzone_total_kills dummy "Total Kills"`,
            );
            server.runCommandSilent(
              `scoreboard objectives setdisplay list warzone_total_kills`,
            );
            server.persistentData.putBoolean("scoreboardsInitialized", true);
          }

          // Teleport to warzone
          server.runCommandSilent(
            `execute in retards:adventure run tp ${player.username} 424 122 552`,
          );

          // Clear inventory
          server.runCommandSilent(`clear ${player.username}`);

          // Initialize kill count
          const data = player.persistentData;
          if (!data.getInt("kills")) data.putInt("kills", 0);

          // Set scoreboard kill count
          server.runCommandSilent(
            `scoreboard players set ${player.username} warzone_total_kills ${data.getInt("kills")}`,
          );

          // Initialize kill streak
          playerKills[player.username] = 0;

          // Set scoreboard kill streak
          server.runCommandSilent(
            `scoreboard players set ${player.username} warzone_kills 0`,
          );

          // Toggle layout
          server.runCommandSilent(
            `fmlayout default_hud_layout false ${player.username}`,
          );
          server.runCommandSilent(
            `fmlayout warzone_hud_layout true ${player.username}`,
          );
        },
      },
    ],
  });

  // /exit_warzone <target>
  registerCommand(event, {
    command: "exit_warzone",
    operator: true,
    parameters: [
      {
        name: "target",
        type: event.arguments.PLAYER,
        handler: (ctx) => {
          const server = ctx.source.server;
          const player = event.arguments.PLAYER.getResult(ctx, "target");

          // Teleport to portal
          server.runCommandSilent(
            `execute in retards:adventure run tp ${player.username} -103 -14 -82`,
          );

          // Clear inventory
          server.runCommandSilent(`clear ${player.username}`);

          // Remove from scoreboards
          server.runCommandSilent(
            `scoreboard players remove ${player.username} warzone_total_kills`,
          );
          server.runCommandSilent(
            `scoreboard players remove ${player.username} warzone_kills`,
          );

          // Toggle layout
          server.runCommandSilent(
            `fmlayout warzone_hud_layout false ${player.username}`,
          );
          server.runCommandSilent(
            `fmlayout default_hud_layout true ${player.username}`,
          );
        },
      },
    ],
  });

  // /warzone_load_loot_tables
  registerCommand(event, {
    command: "warzone_load_loot_tables",
    operator: true,
    handler: (ctx) => {
      const server = ctx.source.server;
      const level = server.getLevel("retards:adventure");

      const itemFrames = filterEntities(
        level,
        (e) => e.type === "minecraft:item_frame",
      );

      loot = { guns: [], items: [] };

      const isAir = (/** @type {Internal.ItemStack} */ item) =>
        item.id === "minecraft:air";

      for (var i = 0; i < itemFrames.size(); i++) {
        var frame = itemFrames.get(i);
        if (frame.item && frame.item.id === "minecraft:copper_ingot") {
          var pos = frame.blockPosition().below();
          var block = level.getBlock(pos);
          if (block.id == "minecraft:chest") {
            console.log(pos);
            /** @type {Internal.Optional<Internal.ChestBlockEntity>} */
            var chestEntity = level.getBlockEntity(pos, "chest");
            if (chestEntity.isPresent()) {
              /** @type {Internal.ChestBlockEntity} */
              var chest = chestEntity.get();
              for (var col = 0; col < 9; col++) {
                var first = chest.getItem(col).copy();
                var second = chest.getItem(col + 9).copy();
                var third = chest.getItem(col + 18).copy();

                if (!isAir(first) && !isAir(second))
                  loot.guns.push([first, second]);
                if (!isAir(third)) loot.items.push(third);
              }
            }
          }
        }
      }

      const gunCount = loot.guns.length;
      const itemCount = loot.items.length;

      server.runCommandSilent(
        `say Loaded ${gunCount} guns and ${itemCount} items`,
      );
    },
  });
});

ServerEvents.tick((event) => {
  if (event.server.tickCount % 1200 !== 0) return;
  if (event.server.tickCount % 2400 === 0)
    event.server.runCommandSilent(
      "execute in retards:adventure run effect give @a[x=424,y=-1,z=552,distance=..128] minecraft:glowing 3 1 true",
    );
  const level = event.server.getLevel("retards:adventure");

  const itemFrames = filterEntities(
    level,
    (entity) => entity.type === "minecraft:item_frame",
  );

  for (var i = 0; i < itemFrames.size(); i++) {
    var frame = itemFrames.get(i);
    if (frame.item && frame.item.id === "minecraft:gunpowder") {
      var pos = frame.blockPosition().above().above();
      var block = level.getBlock(pos);
      if (block.id === "minecraft:chest") {
        /** @type {Internal.Optional<Internal.ChestBlockEntity>} */
        var chestEntity = level.getBlockEntity(pos, "chest");
        if (chestEntity.isPresent()) {
          /** @type {Internal.ChestBlockEntity} */
          var chest = chestEntity.get();
          chest.clearContent();
          var { guns, items } = loot;
          if (guns.length) {
            var [gun, ammo] = guns[Math.floor(Math.random() * guns.length)];
            chest.setItem(0, gun.copy());
            chest.setItem(1, ammo.copy());
          }
          if (items.length) {
            var item = items[Math.floor(Math.random() * items.length)];
            chest.setItem(2, item.copy());
          }
        }
      }
    }
  }
});

EntityEvents.death("player", (event) => {
  const killer = event.source.player;
  const victim = event.entity;

  if (!killer) return;

  // Increase killer total kill count
  const data = killer.persistentData;
  data.putInt("kills", data.getInt("kills") + 1);
  event.server.runCommandSilent(
    `scoreboard players set ${killer.username} warzone_total_kills ${data.getInt("kills")}`,
  );

  // Increase killer kill streak
  if (!playerKills[killer.username]) playerKills[killer.username] = 0;
  playerKills[killer.username]++;
  event.server.runCommandSilent(
    `scoreboard players set ${killer.username} warzone_kills ${playerKills[killer.username]}`,
  );

  // Reset victim kill streak
  playerKills[victim.username] = 0;
  event.server.runCommandSilent(
    `scoreboard players set ${victim.username} warzone_kills 0`,
  );

  // Update player boss
  event.server.runCommandSilent(`effect clear ${playerBoss} minecraft:glowing`);
  for (const [username, kills] of Object.entries(playerKills))
    if (!playerBoss || kills > playerKills[playerBoss]) playerBoss = username;
  event.server.runCommandSilent(`effect clear ${playerBoss} minecraft:glowing`);
});