package game

import (
	"io"
	"log/slog"
	"testing"
	"time"

	"github.com/denisovdennis/autohero/internal/model"
)

func TestResolveCombat_MatchesEngineOutcome(t *testing.T) {
	baseHero := &model.Hero{
		ID:           1,
		Level:        5,
		MaxHP:        320,
		HP:           320,
		Attack:       25,
		Defense:      8,
		Speed:        1.0,
		Strength:     10,
		Constitution: 12,
		Agility:      8,
		Luck:         5,
		Potions:      0,
		State:        model.StateWalking,
	}

	tmpl, ok := model.EnemyTemplates[model.EnemyWolf]
	if !ok {
		tmpl = model.Enemy{
			Type:             model.EnemyWolf,
			Name:             "Forest Wolf",
			MaxHP:            40,
			HP:               40,
			Attack:           8,
			Defense:          2,
			Speed:            1.2,
			BaseLevel:        1,
			LevelVariance:    0.3,
			MaxHeroLevelDiff: 5,
			HPPerLevel:       5,
			AttackPerLevel:   1.5,
			DefensePerLevel:  1.0,
		}
	}
	enemy := ScaleEnemyTemplate(tmpl, baseHero.Level)

	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
	eventCh := make(chan model.CombatEvent, 8)
	engine := NewEngine(100*time.Millisecond, eventCh, logger)

	heroEngine := *baseHero
	enemyEngine := enemy
	engine.StartCombat(&heroEngine, &enemyEngine)

	now := time.Now()
	for i := 0; i < 20000; i++ {
		now = now.Add(100 * time.Millisecond)
		engine.processCombatTick(now)
		if _, ok := engine.GetCombat(heroEngine.ID); !ok {
			break
		}
	}

	heroResolve := *baseHero
	enemyResolve := enemy
	survived := ResolveCombatToEnd(&heroResolve, &enemyResolve, time.Now(), CombatSimOptions{
		TickRate: 100 * time.Millisecond,
	})

	engineSurvived := heroEngine.HP > 0
	if survived != engineSurvived {
		t.Fatalf("survival mismatch: resolve=%v engine=%v", survived, engineSurvived)
	}
	// Final HP can differ: engine applies debuff ticks for all combats before the attack queue each tick,
	// while ResolveCombatToEnd interleaves tick vs attacks on one timeline. Survival is the parity signal.
}