import { expect } from "@esm-bundle/chai";
import { Explorer } from "../../src/units/Explorer.js";

// Mock Class Definitions
const CLASS_VANGUARD = {
  id: "CLASS_VANGUARD",
  base_stats: { health: 100, attack: 10, speed: 5 },
  growth_rates: { health: 10, attack: 1 },
};

const CLASS_TINKER = {
  id: "CLASS_TINKER",
  base_stats: { health: 80, attack: 8, speed: 7 },
  growth_rates: { health: 5, attack: 2 },
};

describe("Unit: Explorer Class Logic", () => {
  it("CoA 1: Should initialize with base stats from definition", () => {
    const hero = new Explorer("p1", "Hero", "CLASS_VANGUARD", CLASS_VANGUARD);

    expect(hero.baseStats.health).to.equal(100);
    expect(hero.baseStats.attack).to.equal(10);
    expect(hero.classMastery["CLASS_VANGUARD"]).to.exist;
    expect(hero.classMastery["CLASS_VANGUARD"].level).to.equal(1);
  });

  it("CoA 2: Should calculate stats based on Level Growth", () => {
    const hero = new Explorer("p1", "Hero", "CLASS_VANGUARD", CLASS_VANGUARD);

    // Manually level up to 3
    hero.classMastery["CLASS_VANGUARD"].level = 3;
    hero.recalculateBaseStats(CLASS_VANGUARD);

    // Level 3 means 2 level-ups.
    // Health: 100 + (10 * 2) = 120
    // Attack: 10 + (1 * 2) = 12
    expect(hero.baseStats.health).to.equal(120);
    expect(hero.baseStats.attack).to.equal(12);
  });

  it("CoA 3: changeClass should switch stats and persist old progress", () => {
    const hero = new Explorer("p1", "Hero", "CLASS_VANGUARD", CLASS_VANGUARD);

    // Level up Vanguard
    hero.classMastery["CLASS_VANGUARD"].level = 5;
    hero.recalculateBaseStats(CLASS_VANGUARD);
    expect(hero.baseStats.health).to.equal(140); // 100 + 40

    // Switch to Tinker (New Job)
    hero.changeClass("CLASS_TINKER", CLASS_TINKER);

    // Should have Level 1 Tinker Stats
    expect(hero.activeClassId).to.equal("CLASS_TINKER");
    expect(hero.baseStats.health).to.equal(80); // Base Tinker

    // Verify Vanguard history is saved
    expect(hero.classMastery["CLASS_VANGUARD"].level).to.equal(5);
  });

  it("CoA 4: Switching BACK to old class should restore high stats", () => {
    const hero = new Explorer("p1", "Hero", "CLASS_VANGUARD", CLASS_VANGUARD);
    hero.classMastery["CLASS_VANGUARD"].level = 5;

    // Switch Away
    hero.changeClass("CLASS_TINKER", CLASS_TINKER);

    // Switch Back
    hero.changeClass("CLASS_VANGUARD", CLASS_VANGUARD);

    // Should be back to Level 5 Stats
    expect(hero.baseStats.health).to.equal(140);
  });
});