package data

import (
	"f1-game/internal/code"
	"f1-game/internal/extend/rand"
)

var (
	dropPoolWeightMap map[int32]*rand.Weight[*DropPoolRow]
)

func (p *dropPoolConfig) OnAfterLoad(_ bool) {
	loadMap := map[int32]*rand.Weight[*DropPoolRow]{}

	for poolID, rows := range p.idListMaps {
		weight := rand.NewSliceWeight(rows, func(v *DropPoolRow) int32 {

			return v.Weight
		})
		loadMap[poolID] = weight
	}

	dropPoolWeightMap = loadMap
}

func (p *dropPoolConfig) RandomOne(dropPoolID int32) (*DropPoolRow, int32) {
	weighter, found := p.GetWeighter(dropPoolID)
	if !found {
		//道具池找不到
		return nil, code.ConfigNotFound_DropPool
	}

	// 随机取一个奖励
	row := weighter.SelectOne()
	if row == nil {
		return nil, code.HeroCannotRecruit
	}

	return row, code.OK
}

func (p *dropPoolConfig) Random(dropPoolID int32, num int32) ([]*DropPoolRow, int32) {
	weighter, found := p.GetWeighter(dropPoolID)
	if !found {
		//道具池找不到
		return nil, code.ConfigNotFound_DropPool
	}

	// 随机num个奖励
	rows := weighter.Select(int(num))
	if rows == nil {
		return nil, code.HeroCannotRecruit
	}

	return rows, code.OK
}

func (p *dropPoolConfig) GetWeighter(itemPoolID int32) (*rand.Weight[*DropPoolRow], bool) {
	value, found := dropPoolWeightMap[itemPoolID]
	return value, found
}

func (p *dropPoolConfig) GetDropPoolRow(poolID, itemID int32) (*DropPoolRow, bool) {
	rows, found := p.ListByID(poolID)
	if !found {
		return nil, false
	}

	for _, row := range rows {
		if row.ItemID == itemID {
			return row, true
		}
	}

	return nil, false
}