package world

import (
	"bd2server/internal/server/gamedata"
	"bd2server/internal/server/wire"
	"fmt"
)

func (s *Service) handlePackDetail(request []byte) (int, []byte, bool, error) {
	seq, found, err := wire.Varint(request, 1)
	if err != nil || !found || seq == 0 || seq > 0x7fffffff {
		return 0, nil, true, fmt.Errorf("%w: PackDetailInfo invalid sequence", ErrInvalidRequest)
	}
	packID, err := requestPack(request)
	if err != nil {
		return 0, nil, true, err
	}
	if !s.packUnlocked(packID) || !s.packSummaryTargets[packID] {
		return 0, nil, true, fmt.Errorf("%w: PackDetailInfo unavailable pack %d", ErrInvalidRequest, packID)
	}
	if s.packDetailDesign == nil {
		return 0, nil, true, fmt.Errorf("world: missing pack detail design loader")
	}
	design, err := s.packDetailDesign(packID)
	if err != nil {
		return 0, nil, true, err
	}
	filter := map[int]bool{}
	for _, id := range design.RegenMonsterIDs {
		filter[id] = true
	}
	ids, err := s.openedFieldObjects(packID)
	if err != nil {
		return 0, nil, true, err
	}
	response := []byte{}
	if len(filter) > 0 {
		rows, e := s.monsterRows(packID, filter)
		if e != nil {
			return 0, nil, true, e
		}
		for _, row := range rows {
			response = wire.AppendBytes(response, 1, row)
		}
	}
	for _, id := range ids {
		response = wire.AppendBytes(response, 2, wire.AppendVarint(nil, 1, uint64(id)))
	}
	research, e := s.state.ResearchObjects(packID)
	if e != nil {
		return 0, nil, true, e
	}
	for _, id := range research {
		response = wire.AppendVarint(response, 3, uint64(id))
	}
	return 627, response, true, nil
}

func (s *Service) attachPackDetailDesign(root, version string) {
	s.packDetailDesign = func(packID int) (gamedata.PackDetailDesign, error) {
		return gamedata.LoadPackDetailDesign(root, version, packID)
	}
}