package gameserver

import (
	"fmt"

	"gac-hkrpg-go/internal/common"
	goproto "gac-hkrpg-go/protocol/proto"
	"google.golang.org/protobuf/proto"
)

type currencyWarsNodeCoordinate struct {
	Chapter uint32
	Section uint32
}

// applyCurrencyWarsRoute fills only the route component. Battle/node status
// belongs to the action that enters a node and is preserved on dst.
// Native GridFightStage.Sync (0xdc05680) copies the three scalar coordinates;
// _SyncRouteInfo (0xdc05740) passes route ID and nodes to SyncRouteNodes. The
// latter stores its first argument in GridFightStageRoute._StageRouteID.
func applyCurrencyWarsRoute(dst *goproto.BEEFLEJAOCN, catalog *common.CurrencyWarsCatalog,
	routeID uint32, current currencyWarsNodeCoordinate,
	displays map[currencyWarsNodeCoordinate]*goproto.OHMDHKGAEMM) error {
	if dst == nil || catalog == nil {
		return fmt.Errorf("CW route destination/catalog is missing")
	}
	rows, err := catalog.RouteNodes(routeID)
	if err != nil {
		return err
	}
	nodes := make([]*goproto.BCCIJHPLJOJ, 0, len(rows))
	foundCurrent := false
	for _, row := range rows {
		coordinate := currencyWarsNodeCoordinate{Chapter: row.ChapterID, Section: row.SectionID}
		display := displays[coordinate]
		if display == nil {
			return fmt.Errorf("CW node configuration is missing: route=%d chapter=%d section=%d template=%d",
				routeID, row.ChapterID, row.SectionID, row.NodeTemplateID)
		}
		nodes = append(nodes, &goproto.BCCIJHPLJOJ{
			DCAHJELNJNP:  row.ChapterID,
			SectionId:    row.SectionID,
			DisplayValue: proto.Clone(display).(*goproto.OHMDHKGAEMM),
		})
		foundCurrent = foundCurrent || coordinate == current
	}
	if !foundCurrent {
		return fmt.Errorf("CW current node is outside captured route")
	}
	if len(displays) != len(rows) {
		return fmt.Errorf("CW node configuration contains coordinates outside captured route")
	}
	// Commit after all input has been validated, preserving dst on any error.
	dst.DCAHJELNJNP = current.Chapter
	dst.SectionId = current.Section
	dst.EMOHLJHPOPC = routeID
	dst.OOMMIIKPHBC = nodes
	return nil
}