import { PlayerStateMachine } from '@logic/PlayerStateMachine';
import { PlayerColorState, PLAYER_IFRAME_SECONDS } from '@common/Constants';

describe('PlayerStateMachine — auto-upgrade (req 5.1-5.2)', () => {
    it('Red → Green on first crystal pickup', () => {
        const sm = new PlayerStateMachine();
        expect(sm.pickupCrystalJade()).toBe(PlayerColorState.Green);
    });

    it('Green → Yellow on second crystal pickup', () => {
        const sm = new PlayerStateMachine();
        sm.pickupCrystalJade();
        expect(sm.pickupCrystalJade()).toBe(PlayerColorState.Yellow);
    });

    it('Yellow → Yellow on additional crystal pickups (no overflow)', () => {
        const sm = new PlayerStateMachine();
        sm.pickupCrystalJade();
        sm.pickupCrystalJade();
        expect(sm.pickupCrystalJade()).toBe(PlayerColorState.Yellow);
    });

    it('Zeng Wan adds one life (req 7.5)', () => {
        const sm = new PlayerStateMachine(1);
        expect(sm.pickupZengWan()).toBe(2);
    });
});

describe('PlayerStateMachine — damage (req 5.3-5.6, 10.4-10.5)', () => {
    it('downgrades from Yellow to Red on shuriken hit', () => {
        const sm = new PlayerStateMachine();
        sm.pickupCrystalJade();
        sm.pickupCrystalJade();
        const out = sm.takeHit('shuriken');
        expect(out).toEqual({ kind: 'downgraded', from: PlayerColorState.Yellow, to: PlayerColorState.Red });
        expect(sm.color).toBe(PlayerColorState.Red);
    });

    it('downgrades from Green to Red on sword hit', () => {
        const sm = new PlayerStateMachine();
        sm.pickupCrystalJade();
        const out = sm.takeHit('sword');
        expect(out.kind).toBe('downgraded');
        expect(sm.color).toBe(PlayerColorState.Red);
    });

    it('Red + shuriken → death, consumes one life', () => {
        const sm = new PlayerStateMachine(2);
        const out = sm.takeHit('shuriken');
        expect(out.kind).toBe('died');
        expect(sm.lives).toBe(1);
        expect(sm.isDead).toBe(false);
    });

    it('fireball is always lethal regardless of color', () => {
        const sm = new PlayerStateMachine(2);
        sm.pickupCrystalJade();
        sm.pickupCrystalJade();
        const out = sm.takeHit('fireball');
        expect(out).toEqual({ kind: 'died', cause: 'fireball' });
        expect(sm.color).toBe(PlayerColorState.Red);
    });

    it('smoke bomb is always lethal', () => {
        const sm = new PlayerStateMachine();
        sm.pickupCrystalJade();
        const out = sm.takeHit('smoke_bomb');
        expect(out.kind).toBe('died');
    });

    it('zero lives → isDead=true', () => {
        const sm = new PlayerStateMachine(1);
        sm.takeHit('sword');
        expect(sm.lives).toBe(0);
        expect(sm.isDead).toBe(true);
    });
});

describe('PlayerStateMachine — iframes & sword parry (req 3.7-3.8, 10.2-10.3)', () => {
    it('i-frames start at PLAYER_IFRAME_SECONDS after a hit', () => {
        const sm = new PlayerStateMachine();
        sm.pickupCrystalJade();
        sm.takeHit('shuriken');
        expect(sm.snapshot.iframeSec).toBe(PLAYER_IFRAME_SECONDS);
    });

    it('hits during i-frames are ignored', () => {
        const sm = new PlayerStateMachine();
        sm.pickupCrystalJade();
        sm.takeHit('shuriken');
        const out = sm.takeHit('shuriken');
        expect(out).toEqual({ kind: 'no_effect', reason: 'iframe' });
    });

    it('tick() drains i-frames so the player is vulnerable again', () => {
        const sm = new PlayerStateMachine();
        sm.pickupCrystalJade();
        sm.takeHit('shuriken');
        sm.tick(PLAYER_IFRAME_SECONDS + 0.01);
        expect(sm.snapshot.iframeSec).toBe(0);
    });

    it('sword parry nullifies shuriken/sword damage', () => {
        const sm = new PlayerStateMachine();
        sm.setSwordActive(true);
        const out = sm.takeHit('shuriken');
        expect(out).toEqual({ kind: 'no_effect', reason: 'parried' });
        expect(sm.color).toBe(PlayerColorState.Red);
    });

    it('sword parry does NOT nullify fireball / smoke_bomb (req 3.8, 10.4-10.5)', () => {
        const sm = new PlayerStateMachine();
        sm.setSwordActive(true);
        expect(sm.takeHit('fireball').kind).toBe('died');
        const sm2 = new PlayerStateMachine();
        sm2.setSwordActive(true);
        expect(sm2.takeHit('smoke_bomb').kind).toBe('died');
    });
});