package gameserver

import (
	"fmt"
	"gac-hkrpg-go/internal/common"
	pb "gac-hkrpg-go/protocol/proto"
)

// Inspect actual battle buffs, rather than ChallengeStageID or a reused stage ID.
// This covers an imported custom battle that already includes Corruption.
func (r *battleRules) applyAhaHelp(battle *pb.SceneBattleInfo, legacyEnabled bool, owner uint32) error {
	var corruption uint32
	for _, buff := range battle.BuffList {
		for _, id := range r.InvasionBuffs {
			if buff.Id == id {
				corruption = id
			}
		}
	}
	if corruption == 0 {
		return nil
	}
	selected, err := common.ReadAhaHelpLevel()
	if err != nil {
		return fmt.Errorf("battle Aha help setting: %w", err)
	}
	rows, err := common.LoadAhaHelpLevels()
	if err != nil {
		return err
	}
	var support, level uint32
	if selected == nil {
		if legacyEnabled {
			support = r.InvasionSupportBuff
		}
	} else if *selected != 0 {
		for _, row := range rows {
			if row.BuffLevel == *selected {
				support, level = row.BuffID, row.BuffLevel
			}
		}
		if support == 0 {
			return fmt.Errorf("battle Aha help level %d is not configured", *selected)
		}
	}
	// The selected/off setting owns this family. Remove old imported support buffs
	// to avoid stacking multiple levels or ignoring an explicit off selection.
	filtered := battle.BuffList[:0]
	for _, buff := range battle.BuffList {
		isSupport := buff.Id == r.InvasionSupportBuff
		for _, row := range rows {
			isSupport = isSupport || buff.Id == row.BuffID
		}
		if !isSupport {
			filtered = append(filtered, buff)
		}
	}
	battle.BuffList = filtered
	if support != 0 {
		battle.BuffList = append(battle.BuffList, battleBuff(support, owner, map[string]float32{"SkillIndex": 1}))
	}
	SceneDebugLog("AHA_HELP stage=%d corruption=%d selected=%v legacy=%t support=%d level=%d", battle.StageId, corruption, selectedValue(selected), legacyEnabled, support, level)
	return nil
}

func selectedValue(value *uint32) any {
	if value == nil {
		return "freesr"
	}
	return *value
}