package game

import (
	"errors"

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

var (
	// ErrReviveQuotaExceeded is returned when a non-subscriber has used their free revives.
	ErrReviveQuotaExceeded = errors.New("revive quota exceeded")
	// ErrReviveNotDead is returned when revive is requested for a living hero.
	ErrReviveNotDead = errors.New("hero is not dead")
)

// IsEffectivelyDead is true when the hero must be revived to keep playing.
func IsEffectivelyDead(hero *model.Hero) bool {
	if hero == nil {
		return false
	}
	return hero.State == model.StateDead || hero.HP <= 0
}

// CheckPlayerReviveQuota enforces the same limits as POST /hero/revive (non-subscribers only).
func CheckPlayerReviveQuota(hero *model.Hero) error {
	if hero == nil {
		return ErrReviveNotDead
	}
	if !hero.SubscriptionActive && hero.ReviveCount >= 2 {
		return ErrReviveQuotaExceeded
	}
	return nil
}

// ApplyHeroReviveMechanical sets partial HP, walking state, clears debuffs, and consumes resurrection buff.
// Used for timeout auto-revive, offline catch-up, and as the base step for button/admin revive.
func ApplyHeroReviveMechanical(hero *model.Hero) {
	if hero == nil {
		return
	}
	hero.HP = int(float64(hero.MaxHP) * tuning.Get().ReviveHpPercent)
	if hero.HP < 1 {
		hero.HP = 1
	}
	hero.State = model.StateWalking
	hero.Buffs = model.RemoveBuffType(hero.Buffs, model.BuffResurrection)
	hero.Debuffs = nil
}

// ApplyPlayerReviveProgressCounters matches POST /api/v1/hero/revive side effects (quota uses ReviveCount).
func ApplyPlayerReviveProgressCounters(hero *model.Hero) {
	if hero == nil {
		return
	}
	hero.TotalDeaths++
	hero.KillsSinceDeath = 0
	hero.ReviveCount++
}