import { describe, expect, it } from "vitest";
import { dungeonSpawnSelected, selectDungeonSessionPopulation } from "./dungeonSpawnSelection";

describe("dungeon spawn selection", () => {
  it("keeps ordinary spawns and honors source chance boundaries", () => {
    expect(dungeonSpawnSelected("deadmines", 1, { id: "ordinary" })).toBe(true);
    expect(dungeonSpawnSelected("deadmines", 1, { id: "never", spawnChance: 0 })).toBe(false);
    expect(dungeonSpawnSelected("deadmines", 1, { id: "always", spawnChance: 1 })).toBe(true);
  });

  it("selects rare spawns deterministically within a dungeon session", () => {
    const results = Array.from({ length: 100 }, (_, sessionRevision) => (
      dungeonSpawnSelected("blackrock-spire", sessionRevision, {
        id: "creature-43519",
        spawnChance: 0.15,
      })
    ));

    expect(results.some(Boolean)).toBe(true);
    expect(results.some((selected) => !selected)).toBe(true);
    expect(results).toEqual(Array.from({ length: 100 }, (_, sessionRevision) => (
      dungeonSpawnSelected("blackrock-spire", sessionRevision, {
        id: "creature-43519",
        spawnChance: 0.15,
      })
    )));
  });

  it("filters static and roaming source populations with the same session rule", () => {
    const population = selectDungeonSessionPopulation("stockades", 4, [
      { id: "ordinary", entityId: "guard", position: [0, 0, 0] },
      { id: "removed", entityId: "rare", position: [1, 0, 0], spawnChance: 0 },
    ], [{
      id: "removed-patrol",
      name: "Rare Patrol",
      speed: 1,
      formationSource: "database-solo",
      spawnChance: 0,
      waypoints: [[0, 0, 0], [1, 0, 0]],
      members: [{ id: "member", entityId: "rare", role: "leader", formationOffset: [0, 0, 0] }],
    }]);

    expect(population.staticSpawns.map((spawn) => spawn.id)).toEqual(["ordinary"]);
    expect(population.roamingPacks).toEqual([]);
  });
});