import { describe, expect, it } from "vitest";

import { sampleContentPack } from "@/data/sampleContentPack";

import { createRoomStateFromTemplate } from "./rooms";
import { resolveRoomEncounter } from "./encounters";

function createSequenceRoller(values: number[]) {
  let index = 0;

  return () => {
    const next = values[index];
    index += 1;
    return next;
  };
}

describe("encounter resolution", () => {
  it("marks explicitly empty rooms as having no encounter", () => {
    const room = createRoomStateFromTemplate(
      sampleContentPack,
      "room.level1.small.empty",
      1,
      "room.level1.small.empty-space",
    );
    room.notes.push("Nothing here.");

    const result = resolveRoomEncounter(sampleContentPack, room);

    expect(result.encounter?.creatureIds).toEqual([]);
    expect(result.encounter?.resultLabel).toBe("No encounter");
  });

  it("uses room context to resolve a guard encounter table", () => {
    const room = createRoomStateFromTemplate(
      sampleContentPack,
      "room.level1.guard-room",
      1,
      "room.level1.normal.guard-room",
    );
    room.notes.push("Use the guards encounter table if occupied.");

    const result = resolveRoomEncounter(
      sampleContentPack,
      room,
      createSequenceRoller([6]),
    );

    expect(result.lookup?.entry.label).toBe("Guard and Warrior");
    expect(result.encounter?.sourceTableCode).toBe("L1G");
    expect(result.encounter?.creatureNames).toEqual(["Guard", "Warrior"]);
  });

  it("resolves crate events from room context when the room hints at crate rolls", () => {
    const room = createRoomStateFromTemplate(
      sampleContentPack,
      "room.level1.storage-area",
      1,
      "room.level1.normal.storage-area",
    );
    room.notes.push("Roll for food, drink, or crate events while searching.");

    const result = resolveRoomEncounter(
      sampleContentPack,
      room,
      createSequenceRoller([2]),
    );

    expect(result.lookup?.entry.label).toBe("Giant Rat Pair");
    expect(result.encounter?.sourceTableCode).toBe("L1CE");
    expect(result.encounter?.creatureNames).toEqual(["Giant Rat Pair"]);
  });
});