package service

import (
	"fmt"
	"math"
	"strconv"
	"strings"
	"time"

	"browser.local/platform/domain"
	"browser.local/platform/repo"
	"browser.local/platform/validator"
)

func (svc *CoreService) ApplySCUMObservationResult(result domain.SCUMObservationResult) (domain.SCUMDataObservation, error) {
	result = domain.CopySCUMObservationResult(result)
	if strings.TrimSpace(result.ServerInstanceID) == "" {
		return domain.SCUMDataObservation{}, validationError("serverInstanceId is required")
	}
	instance, err := svc.store.ServerInstances().Get(result.ServerInstanceID)
	if err != nil {
		return domain.SCUMDataObservation{}, err
	}
	if strings.TrimSpace(result.PluginID) == "" {
		result.PluginID = instance.PluginID
	}
	if result.PluginID != instance.PluginID {
		return domain.SCUMDataObservation{}, validationError("pluginId must match server instance")
	}
	if strings.TrimSpace(result.QueryKey) == "" {
		return domain.SCUMDataObservation{}, validationError("queryKey is required")
	}
	if result.ReceivedAt.IsZero() {
		result.ReceivedAt = svc.now()
	}
	if result.ObservedAt.IsZero() {
		result.ObservedAt = result.ReceivedAt
	}
	if result.Status == "" {
		result.Status = domain.SCUMObservationAccepted
	}
	latest, err := svc.latestSCUMObservation(result.ServerInstanceID, result.PluginID, result.QueryKey)
	if err != nil {
		return domain.SCUMDataObservation{}, err
	}
	if result.Status == domain.SCUMObservationAccepted && !latest.ObservedAt.IsZero() && scumObservationOlder(result, latest) {
		result.Status = domain.SCUMObservationStale
		result.ErrorCode = "older_observation"
		result.SafeSummary = domain.SCUMSafeSummary{Title: "旧数据已忽略", Message: "Run 返回的 SCUM.db 数据早于当前本地记录，未覆盖 last-known-good 数据。"}
	}
	observation := domain.SCUMDataObservation{ID: scumObservationID(result), ServerInstanceID: result.ServerInstanceID, PluginID: result.PluginID, Source: result.Source, QueryKey: result.QueryKey, Sequence: result.Sequence, Checksum: result.Checksum, Status: result.Status, ErrorCode: result.ErrorCode, SafeSummary: result.SafeSummary, ObservedAt: result.ObservedAt, ReceivedAt: result.ReceivedAt}
	if err := svc.upsertSCUMObservation(observation); err != nil {
		return domain.SCUMDataObservation{}, err
	}
	if result.Status != domain.SCUMObservationAccepted {
		if result.Status == domain.SCUMObservationFailed {
			return observation, svc.markSCUMQueryStale(result, "observation_failed")
		}
		return observation, nil
	}
	freshness := domain.SCUMProjectionFreshnessState{Status: domain.SCUMProjectionFresh, ObservationID: observation.ID, Source: observation.Source, QueryKey: observation.QueryKey, Sequence: observation.Sequence, Checksum: observation.Checksum, ObservedAt: observation.ObservedAt, ReceivedAt: observation.ReceivedAt}
	if err := svc.applySCUMRows(result.QueryKey, result.ServerInstanceID, result.Rows, freshness); err != nil {
		return domain.SCUMDataObservation{}, err
	}
	return observation, nil
}

func (svc *CoreService) ListSCUMPlayerLiveStatesForSession(sessionID string, filter domain.SCUMProjectionFilter) ([]domain.SCUMPlayerLiveState, error) {
	if err := svc.authorizeServerLifecycle(sessionID, filter.ServerInstanceID); err != nil {
		return nil, err
	}
	values, err := svc.store.SCUMPlayerLiveStates().List(filter)
	if err != nil {
		return nil, err
	}
	limitSCUMProjectionSlice(&values, filter.Limit)
	return values, nil
}

func (svc *CoreService) ListSCUMSquadsForSession(sessionID string, filter domain.SCUMProjectionFilter) ([]domain.SCUMSquad, error) {
	if err := svc.authorizeServerLifecycle(sessionID, filter.ServerInstanceID); err != nil {
		return nil, err
	}
	values, err := svc.store.SCUMSquads().List(filter)
	if err != nil {
		return nil, err
	}
	limitSCUMProjectionSlice(&values, filter.Limit)
	return values, nil
}

func (svc *CoreService) ListSCUMSquadMembersForSession(sessionID string, filter domain.SCUMProjectionFilter) ([]domain.SCUMSquadMember, error) {
	if err := svc.authorizeServerLifecycle(sessionID, filter.ServerInstanceID); err != nil {
		return nil, err
	}
	values, err := svc.store.SCUMSquadMembers().List(filter)
	if err != nil {
		return nil, err
	}
	limitSCUMProjectionSlice(&values, filter.Limit)
	return values, nil
}

func (svc *CoreService) ListSCUMVehiclesForSession(sessionID string, filter domain.SCUMProjectionFilter) ([]domain.SCUMVehicle, error) {
	if err := svc.authorizeServerLifecycle(sessionID, filter.ServerInstanceID); err != nil {
		return nil, err
	}
	values, err := svc.store.SCUMVehicles().List(filter)
	if err != nil {
		return nil, err
	}
	limitSCUMProjectionSlice(&values, filter.Limit)
	return values, nil
}

func (svc *CoreService) ListSCUMFlagsForSession(sessionID string, filter domain.SCUMProjectionFilter) ([]domain.SCUMFlag, error) {
	if err := svc.authorizeServerLifecycle(sessionID, filter.ServerInstanceID); err != nil {
		return nil, err
	}
	values, err := svc.store.SCUMFlags().List(filter)
	if err != nil {
		return nil, err
	}
	limitSCUMProjectionSlice(&values, filter.Limit)
	return values, nil
}

func (svc *CoreService) ListSCUMCurrentPositionsForSession(sessionID string, filter domain.SCUMProjectionFilter) ([]domain.SCUMCurrentPosition, error) {
	if err := svc.authorizeServerLifecycle(sessionID, filter.ServerInstanceID); err != nil {
		return nil, err
	}
	values, err := svc.store.SCUMCurrentPositions().List(filter)
	if err != nil {
		return nil, err
	}
	limitSCUMProjectionSlice(&values, filter.Limit)
	return values, nil
}

func (svc *CoreService) latestSCUMObservation(serverID, pluginID, queryKey string) (domain.SCUMDataObservation, error) {
	observations, err := svc.store.SCUMDataObservations().List(domain.SCUMProjectionFilter{ServerInstanceID: serverID, QueryKey: queryKey})
	if err != nil {
		return domain.SCUMDataObservation{}, err
	}
	var latest domain.SCUMDataObservation
	for _, observation := range observations {
		if pluginID != "" && observation.PluginID != pluginID {
			continue
		}
		if latest.ObservedAt.IsZero() || observation.Sequence > latest.Sequence || (observation.Sequence == latest.Sequence && observation.ObservedAt.After(latest.ObservedAt)) {
			latest = observation
		}
	}
	return latest, nil
}

func scumObservationOlder(next domain.SCUMObservationResult, latest domain.SCUMDataObservation) bool {
	if next.Sequence > 0 && latest.Sequence > 0 && next.Sequence <= latest.Sequence {
		return true
	}
	return !next.ObservedAt.IsZero() && !latest.ObservedAt.IsZero() && next.ObservedAt.Before(latest.ObservedAt)
}

func (svc *CoreService) upsertSCUMObservation(observation domain.SCUMDataObservation) error {
	if existing, err := svc.store.SCUMDataObservations().Get(observation.ID); err == nil {
		existing.Status = observation.Status
		existing.ErrorCode = observation.ErrorCode
		existing.SafeSummary = observation.SafeSummary
		existing.ReceivedAt = observation.ReceivedAt
		return svc.store.SCUMDataObservations().Update(existing)
	} else if err != repo.ErrNotFound {
		return err
	}
	return svc.store.SCUMDataObservations().Create(observation)
}

func (svc *CoreService) applySCUMRows(queryKey, serverID string, rows []map[string]any, freshness domain.SCUMProjectionFreshnessState) error {
	lower := strings.ToLower(queryKey)
	if strings.Contains(lower, "player") || strings.Contains(lower, "profile") || strings.Contains(lower, "economy") {
		for _, row := range rows {
			if err := svc.applySCUMPlayerRow(serverID, row, freshness); err != nil {
				return err
			}
		}
	}
	if strings.Contains(lower, "squad-member") || strings.Contains(lower, "squad.member") || strings.Contains(lower, "member") {
		for _, row := range rows {
			if err := svc.applySCUMSquadMemberRow(serverID, row, freshness); err != nil {
				return err
			}
		}
	} else if strings.Contains(lower, "squad") {
		for _, row := range rows {
			if err := svc.applySCUMSquadRow(serverID, row, freshness); err != nil {
				return err
			}
		}
	}
	if strings.Contains(lower, "vehicle") {
		for _, row := range rows {
			if err := svc.applySCUMVehicleRow(serverID, row, freshness); err != nil {
				return err
			}
		}
	}
	if strings.Contains(lower, "flag") {
		for _, row := range rows {
			if err := svc.applySCUMFlagRow(serverID, row, freshness); err != nil {
				return err
			}
		}
	}
	if strings.Contains(lower, "position") || strings.Contains(lower, "coordinate") {
		for _, row := range rows {
			if err := svc.applySCUMPositionRow(serverID, row, freshness); err != nil {
				return err
			}
		}
	}
	return nil
}

func (svc *CoreService) applySCUMPlayerRow(serverID string, row map[string]any, freshness domain.SCUMProjectionFreshnessState) error {
	gamePlayerID := firstString(row, "gamePlayerId", "playerId", "steamId", "steam_id")
	profileID := firstString(row, "userProfileId", "user_profile_id", "profileId")
	steamID := firstString(row, "steamId", "steam_id")
	name := firstString(row, "displayName", "name", "playerName")
	if gamePlayerID == "" && steamID != "" {
		gamePlayerID = steamID
	}
	if gamePlayerID == "" && profileID == "" {
		return nil
	}
	playerRecordID := ""
	if gamePlayerID != "" {
		playerRecordID = gamePlayerRecordID(serverID, gamePlayerID)
		if err := svc.upsertSCUMGamePlayer(serverID, playerRecordID, gamePlayerID, name, freshness.ObservedAt); err != nil {
			return err
		}
	}
	idSource := gamePlayerID
	if idSource == "" {
		idSource = "profile-" + profileID
	}
	id := scumProjectionID("player-live", serverID, idSource)
	state, err := svc.store.SCUMPlayerLiveStates().Get(id)
	if err == repo.ErrNotFound {
		state = domain.SCUMPlayerLiveState{ID: id, ServerInstanceID: serverID, GamePlayerRecordID: playerRecordID, GamePlayerID: gamePlayerID, UserProfileID: profileID, SteamID: steamID, DisplayName: name, Freshness: domain.SCUMProjectionStateUnknown(), CreatedAt: svc.now()}
	} else if err != nil {
		return err
	}
	if isProjectionOlder(freshness, state.Freshness) {
		return nil
	}
	state.GamePlayerRecordID = coalesceString(playerRecordID, state.GamePlayerRecordID)
	state.GamePlayerID = coalesceString(gamePlayerID, state.GamePlayerID)
	state.UserProfileID = coalesceString(profileID, state.UserProfileID)
	state.SteamID = coalesceString(steamID, state.SteamID)
	state.DisplayName = coalesceString(name, state.DisplayName)
	state.SquadID = coalesceString(firstString(row, "squadId", "squad_id"), state.SquadID)
	state.SquadName = coalesceString(firstString(row, "squadName", "squad_name"), state.SquadName)
	if value, ok := firstFloat(row, "famePoints", "fame_points", "fame"); ok {
		state.FamePoints = value
	}
	if value, ok := firstFloat(row, "normalBalance", "currencyNormal", "money", "normal_balance"); ok {
		state.NormalBalance = value
	}
	if value, ok := firstFloat(row, "goldBalance", "currencyGold", "gold", "gold_balance"); ok {
		state.GoldBalance = value
	}
	if value, ok := firstBool(row, "online", "isOnline"); ok {
		state.Online = value
	}
	state.LastLoginAt = coalesceTime(firstTime(row, "lastLoginAt", "last_login_at"), state.LastLoginAt)
	state.LastLogoutAt = coalesceTime(firstTime(row, "lastLogoutAt", "last_logout_at"), state.LastLogoutAt)
	state.LastSaveTime = coalesceTime(firstTime(row, "lastSaveTime", "last_save_time"), state.LastSaveTime)
	if position, ok := scumPositionFromRow(serverID, domain.SCUMProjectionSubjectPlayer, gamePlayerID, row, freshness); ok {
		position.GamePlayerRecordID = playerRecordID
		position.GamePlayerID = gamePlayerID
		state.Position = position
		if err := svc.upsertSCUMPosition(position); err != nil {
			return err
		}
	}
	state.UnknownFields = unknownRowFields(row, "gamePlayerId", "playerId", "steamId", "steam_id", "userProfileId", "user_profile_id", "profileId", "displayName", "name", "playerName", "squadId", "squad_id", "squadName", "squad_name", "famePoints", "fame_points", "fame", "normalBalance", "currencyNormal", "money", "normal_balance", "goldBalance", "currencyGold", "gold", "gold_balance", "online", "isOnline", "lastLoginAt", "last_login_at", "lastLogoutAt", "last_logout_at", "lastSaveTime", "last_save_time", "x", "y", "z", "worldX", "worldY", "worldZ", "mapId", "mapVersion")
	state.Freshness = freshness
	state.UpdatedAt = svc.now()
	if err == repo.ErrNotFound {
		return svc.store.SCUMPlayerLiveStates().Create(state)
	}
	return svc.store.SCUMPlayerLiveStates().Update(state)
}

func (svc *CoreService) applySCUMSquadRow(serverID string, row map[string]any, freshness domain.SCUMProjectionFreshnessState) error {
	squadID := firstString(row, "squadId", "squad_id", "id")
	if squadID == "" {
		return nil
	}
	id := scumProjectionID("squad", serverID, squadID)
	value, err := svc.store.SCUMSquads().Get(id)
	if err == repo.ErrNotFound {
		value = domain.SCUMSquad{ID: id, ServerInstanceID: serverID, SquadID: squadID, Freshness: domain.SCUMProjectionStateUnknown(), CreatedAt: svc.now()}
	} else if err != nil {
		return err
	}
	if isProjectionOlder(freshness, value.Freshness) {
		return nil
	}
	value.Name = coalesceString(firstString(row, "name", "squadName", "squad_name"), value.Name)
	value.LeaderProfileID = coalesceString(firstString(row, "leaderProfileId", "leader_profile_id"), value.LeaderProfileID)
	value.LeaderPlayerID = coalesceString(firstString(row, "leaderPlayerId", "leader_player_id", "leaderSteamId"), value.LeaderPlayerID)
	if memberCount, ok := firstInt(row, "memberCount", "member_count"); ok {
		value.MemberCount = memberCount
	}
	if score, ok := firstFloat(row, "score", "fame", "points"); ok {
		value.Score = score
	}
	value.UnknownFields = unknownRowFields(row, "squadId", "squad_id", "id", "name", "squadName", "squad_name", "leaderProfileId", "leader_profile_id", "leaderPlayerId", "leader_player_id", "leaderSteamId", "memberCount", "member_count", "score", "fame", "points")
	value.Freshness = freshness
	value.UpdatedAt = svc.now()
	if err == repo.ErrNotFound {
		return svc.store.SCUMSquads().Create(value)
	}
	return svc.store.SCUMSquads().Update(value)
}

func (svc *CoreService) applySCUMSquadMemberRow(serverID string, row map[string]any, freshness domain.SCUMProjectionFreshnessState) error {
	squadID := firstString(row, "squadId", "squad_id")
	profileID := firstString(row, "userProfileId", "user_profile_id", "profileId")
	gamePlayerID := firstString(row, "gamePlayerId", "playerId", "steamId", "steam_id")
	if squadID == "" || (profileID == "" && gamePlayerID == "") {
		return nil
	}
	playerRecordID := ""
	if gamePlayerID != "" {
		playerRecordID = gamePlayerRecordID(serverID, gamePlayerID)
		if err := svc.upsertSCUMGamePlayer(serverID, playerRecordID, gamePlayerID, firstString(row, "displayName", "name", "playerName"), freshness.ObservedAt); err != nil {
			return err
		}
	}
	id := scumProjectionID("squad-member", serverID, squadID+"/"+coalesceString(profileID, gamePlayerID))
	value, err := svc.store.SCUMSquadMembers().Get(id)
	if err == repo.ErrNotFound {
		value = domain.SCUMSquadMember{ID: id, ServerInstanceID: serverID, SquadID: squadID, UserProfileID: profileID, GamePlayerRecordID: playerRecordID, GamePlayerID: gamePlayerID, Freshness: domain.SCUMProjectionStateUnknown(), CreatedAt: svc.now()}
	} else if err != nil {
		return err
	}
	if isProjectionOlder(freshness, value.Freshness) {
		return nil
	}
	value.UserProfileID = coalesceString(profileID, value.UserProfileID)
	value.GamePlayerRecordID = coalesceString(playerRecordID, value.GamePlayerRecordID)
	value.GamePlayerID = coalesceString(gamePlayerID, value.GamePlayerID)
	value.SteamID = coalesceString(firstString(row, "steamId", "steam_id"), value.SteamID)
	value.DisplayName = coalesceString(firstString(row, "displayName", "name", "playerName"), value.DisplayName)
	value.Rank = coalesceString(firstString(row, "rank", "role"), value.Rank)
	if isLeader, ok := firstBool(row, "isLeader", "leader"); ok {
		value.IsLeader = isLeader
	}
	value.JoinedAt = coalesceTime(firstTime(row, "joinedAt", "joined_at"), value.JoinedAt)
	value.UnknownFields = unknownRowFields(row, "squadId", "squad_id", "userProfileId", "user_profile_id", "profileId", "gamePlayerId", "playerId", "steamId", "steam_id", "displayName", "name", "playerName", "rank", "role", "isLeader", "leader", "joinedAt", "joined_at")
	value.Freshness = freshness
	value.UpdatedAt = svc.now()
	if err == repo.ErrNotFound {
		return svc.store.SCUMSquadMembers().Create(value)
	}
	return svc.store.SCUMSquadMembers().Update(value)
}

func (svc *CoreService) applySCUMVehicleRow(serverID string, row map[string]any, freshness domain.SCUMProjectionFreshnessState) error {
	vehicleID := firstString(row, "vehicleId", "vehicle_id", "id")
	entityID := firstString(row, "entityId", "entity_id")
	if vehicleID == "" && entityID != "" {
		vehicleID = entityID
	}
	if vehicleID == "" {
		return nil
	}
	id := scumProjectionID("vehicle", serverID, vehicleID)
	value, err := svc.store.SCUMVehicles().Get(id)
	if err == repo.ErrNotFound {
		value = domain.SCUMVehicle{ID: id, ServerInstanceID: serverID, VehicleID: vehicleID, Freshness: domain.SCUMProjectionStateUnknown(), CreatedAt: svc.now()}
	} else if err != nil {
		return err
	}
	if isProjectionOlder(freshness, value.Freshness) {
		return nil
	}
	value.EntityID = coalesceString(entityID, value.EntityID)
	value.ClassName = coalesceString(firstString(row, "className", "class", "type"), value.ClassName)
	value.Label = coalesceString(firstString(row, "label", "vehicleName", "name"), value.Label)
	if value.Label == "" {
		value.Label = coalesceString(value.ClassName, "Unknown vehicle")
	}
	value.OwnerProfileID = coalesceString(firstString(row, "ownerProfileId", "owner_profile_id", "userProfileId", "user_profile_id"), value.OwnerProfileID)
	value.OwnerPlayerID = coalesceString(firstString(row, "ownerPlayerId", "owner_player_id", "steamId", "steam_id"), value.OwnerPlayerID)
	value.SquadID = coalesceString(firstString(row, "squadId", "squad_id"), value.SquadID)
	if position, ok := scumPositionFromRow(serverID, domain.SCUMProjectionSubjectVehicle, vehicleID, row, freshness); ok {
		position.VehicleID = vehicleID
		position.EntityID = entityID
		value.Position = position
		if err := svc.upsertSCUMPosition(position); err != nil {
			return err
		}
	}
	value.UnknownFields = unknownRowFields(row, "vehicleId", "vehicle_id", "id", "entityId", "entity_id", "className", "class", "type", "label", "vehicleName", "name", "ownerProfileId", "owner_profile_id", "userProfileId", "user_profile_id", "ownerPlayerId", "owner_player_id", "steamId", "steam_id", "squadId", "squad_id", "x", "y", "z", "worldX", "worldY", "worldZ", "mapId", "mapVersion")
	value.Freshness = freshness
	value.UpdatedAt = svc.now()
	if err == repo.ErrNotFound {
		return svc.store.SCUMVehicles().Create(value)
	}
	return svc.store.SCUMVehicles().Update(value)
}

func (svc *CoreService) applySCUMFlagRow(serverID string, row map[string]any, freshness domain.SCUMProjectionFreshnessState) error {
	flagID := firstString(row, "flagId", "flag_id", "baseElementId", "base_element_id", "id")
	entityID := firstString(row, "entityId", "entity_id")
	if flagID == "" && entityID != "" {
		flagID = entityID
	}
	if flagID == "" {
		return nil
	}
	id := scumProjectionID("flag", serverID, flagID)
	value, err := svc.store.SCUMFlags().Get(id)
	if err == repo.ErrNotFound {
		value = domain.SCUMFlag{ID: id, ServerInstanceID: serverID, FlagID: flagID, Freshness: domain.SCUMProjectionStateUnknown(), CreatedAt: svc.now()}
	} else if err != nil {
		return err
	}
	if isProjectionOlder(freshness, value.Freshness) {
		return nil
	}
	value.EntityID = coalesceString(entityID, value.EntityID)
	value.OwnerProfileID = coalesceString(firstString(row, "ownerProfileId", "owner_profile_id", "userProfileId", "user_profile_id"), value.OwnerProfileID)
	value.OwnerPlayerID = coalesceString(firstString(row, "ownerPlayerId", "owner_player_id", "steamId", "steam_id"), value.OwnerPlayerID)
	value.OwnerSquadID = coalesceString(firstString(row, "ownerSquadId", "owner_squad_id", "squadId", "squad_id"), value.OwnerSquadID)
	value.OwnerSquadName = coalesceString(firstString(row, "ownerSquadName", "owner_squad_name", "squadName", "squad_name"), value.OwnerSquadName)
	value.OwnershipConfidence = coalesceString(firstString(row, "ownershipConfidence", "ownership_confidence"), value.OwnershipConfidence)
	if value.OwnershipConfidence == "" {
		value.OwnershipConfidence = "unknown"
	}
	if position, ok := scumPositionFromRow(serverID, domain.SCUMProjectionSubjectFlag, flagID, row, freshness); ok {
		position.EntityID = entityID
		value.Position = position
		if err := svc.upsertSCUMPosition(position); err != nil {
			return err
		}
	}
	value.UnknownFields = unknownRowFields(row, "flagId", "flag_id", "baseElementId", "base_element_id", "id", "entityId", "entity_id", "ownerProfileId", "owner_profile_id", "userProfileId", "user_profile_id", "ownerPlayerId", "owner_player_id", "steamId", "steam_id", "ownerSquadId", "owner_squad_id", "squadId", "squad_id", "ownerSquadName", "owner_squad_name", "squadName", "squad_name", "ownershipConfidence", "ownership_confidence", "x", "y", "z", "worldX", "worldY", "worldZ", "mapId", "mapVersion")
	value.Freshness = freshness
	value.UpdatedAt = svc.now()
	if err == repo.ErrNotFound {
		return svc.store.SCUMFlags().Create(value)
	}
	return svc.store.SCUMFlags().Update(value)
}

func (svc *CoreService) applySCUMPositionRow(serverID string, row map[string]any, freshness domain.SCUMProjectionFreshnessState) error {
	subjectType := domain.SCUMProjectionSubject(firstString(row, "subjectType", "subject_type"))
	if subjectType == "" {
		if firstString(row, "vehicleId", "vehicle_id") != "" {
			subjectType = domain.SCUMProjectionSubjectVehicle
		} else {
			subjectType = domain.SCUMProjectionSubjectPlayer
		}
	}
	subjectID := firstString(row, "subjectId", "subject_id", "gamePlayerId", "playerId", "vehicleId", "flagId", "entityId", "id")
	position, ok := scumPositionFromRow(serverID, subjectType, subjectID, row, freshness)
	if !ok {
		return nil
	}
	position.GamePlayerID = firstString(row, "gamePlayerId", "playerId", "steamId", "steam_id")
	if position.GamePlayerID != "" {
		position.GamePlayerRecordID = gamePlayerRecordID(serverID, position.GamePlayerID)
	}
	position.VehicleID = firstString(row, "vehicleId", "vehicle_id")
	position.EntityID = firstString(row, "entityId", "entity_id")
	return svc.upsertSCUMPosition(position)
}

func (svc *CoreService) upsertSCUMGamePlayer(serverID, recordID, gamePlayerID, displayName string, observedAt time.Time) error {
	if gamePlayerID == "" || recordID == "" {
		return nil
	}
	if observedAt.IsZero() {
		observedAt = svc.now()
	}
	player, err := svc.store.GamePlayers().Get(recordID)
	if err == repo.ErrNotFound {
		return svc.store.GamePlayers().Create(domain.GamePlayer{ID: recordID, ServerInstanceID: serverID, GamePlayerID: gamePlayerID, DisplayName: displayName, FirstSeenAt: observedAt, LastSeenAt: observedAt, LastEventAt: observedAt, CreatedAt: svc.now(), UpdatedAt: svc.now()})
	}
	if err != nil {
		return err
	}
	if observedAt.Before(player.LastEventAt) {
		return nil
	}
	player.DisplayName = coalesceString(displayName, player.DisplayName)
	player.LastSeenAt = maxTime(player.LastSeenAt, observedAt)
	player.LastEventAt = observedAt
	player.UpdatedAt = svc.now()
	return svc.store.GamePlayers().Update(player)
}

func (svc *CoreService) projectSCUMLoginLiveState(player domain.GamePlayer, batch domain.LogBatchIngest, entry domain.LogEntry, observedAt time.Time, online bool, reason string) error {
	if player.ID == "" || player.GamePlayerID == "" {
		return nil
	}
	freshness := domain.SCUMProjectionFreshnessState{Status: domain.SCUMProjectionFresh, ObservationID: entryID(batch.LogStreamID, entry.Seq), Source: "login-log", QueryKey: strings.TrimSpace(entry.Fields["eventType"]), Sequence: entry.Seq, Checksum: validator.LogLineChecksum(entry.Line), ObservedAt: observedAt, ReceivedAt: svc.now()}
	id := scumProjectionID("player-live", player.ServerInstanceID, player.GamePlayerID)
	state, err := svc.store.SCUMPlayerLiveStates().Get(id)
	if err == repo.ErrNotFound {
		state = domain.SCUMPlayerLiveState{ID: id, ServerInstanceID: player.ServerInstanceID, GamePlayerRecordID: player.ID, GamePlayerID: player.GamePlayerID, DisplayName: player.DisplayName, Freshness: domain.SCUMProjectionStateUnknown(), CreatedAt: svc.now()}
	} else if err != nil {
		return err
	}
	if isProjectionOlder(freshness, state.Freshness) {
		return nil
	}
	state.GamePlayerRecordID = player.ID
	state.GamePlayerID = player.GamePlayerID
	state.DisplayName = player.DisplayName
	state.Online = online
	if online {
		state.LastLoginAt = observedAt
	} else {
		state.LastLogoutAt = observedAt
	}
	state.Freshness = freshness
	if reason != "" {
		state.UnknownFields = domain.CopyGameClientBridgePayload(map[string]any{"lastLogoutReason": bounded(reason, 80)})
	}
	state.UpdatedAt = svc.now()
	if err == repo.ErrNotFound {
		return svc.store.SCUMPlayerLiveStates().Create(state)
	}
	return svc.store.SCUMPlayerLiveStates().Update(state)
}

func (svc *CoreService) upsertSCUMPosition(position domain.SCUMCurrentPosition) error {
	existing, err := svc.store.SCUMCurrentPositions().Get(position.ID)
	if err == repo.ErrNotFound {
		position.CreatedAt = svc.now()
		position.UpdatedAt = svc.now()
		return svc.store.SCUMCurrentPositions().Create(position)
	}
	if err != nil {
		return err
	}
	if isProjectionOlder(position.Freshness, existing.Freshness) {
		return nil
	}
	position.CreatedAt = existing.CreatedAt
	position.UpdatedAt = svc.now()
	return svc.store.SCUMCurrentPositions().Update(position)
}

func (svc *CoreService) markSCUMQueryStale(result domain.SCUMObservationResult, reason string) error {
	freshness := domain.SCUMProjectionFreshnessState{Status: domain.SCUMProjectionStale, ObservationID: scumObservationID(result), Source: result.Source, QueryKey: result.QueryKey, Sequence: result.Sequence, Checksum: result.Checksum, StaleReason: reason, ObservedAt: result.ObservedAt, ReceivedAt: result.ReceivedAt}
	lower := strings.ToLower(result.QueryKey)
	if strings.Contains(lower, "player") || strings.Contains(lower, "profile") || strings.Contains(lower, "economy") {
		values, err := svc.store.SCUMPlayerLiveStates().List(domain.SCUMProjectionFilter{ServerInstanceID: result.ServerInstanceID})
		if err != nil {
			return err
		}
		for _, value := range values {
			if !isProjectionOlder(freshness, value.Freshness) {
				value.Freshness = freshness
				value.UpdatedAt = svc.now()
				if err := svc.store.SCUMPlayerLiveStates().Update(value); err != nil {
					return err
				}
			}
		}
	}
	if strings.Contains(lower, "squad") {
		values, err := svc.store.SCUMSquads().List(domain.SCUMProjectionFilter{ServerInstanceID: result.ServerInstanceID})
		if err != nil {
			return err
		}
		for _, value := range values {
			if !isProjectionOlder(freshness, value.Freshness) {
				value.Freshness = freshness
				value.UpdatedAt = svc.now()
				if err := svc.store.SCUMSquads().Update(value); err != nil {
					return err
				}
			}
		}
	}
	if strings.Contains(lower, "vehicle") {
		values, err := svc.store.SCUMVehicles().List(domain.SCUMProjectionFilter{ServerInstanceID: result.ServerInstanceID})
		if err != nil {
			return err
		}
		for _, value := range values {
			if !isProjectionOlder(freshness, value.Freshness) {
				value.Freshness = freshness
				value.UpdatedAt = svc.now()
				if err := svc.store.SCUMVehicles().Update(value); err != nil {
					return err
				}
			}
		}
	}
	if strings.Contains(lower, "flag") {
		values, err := svc.store.SCUMFlags().List(domain.SCUMProjectionFilter{ServerInstanceID: result.ServerInstanceID})
		if err != nil {
			return err
		}
		for _, value := range values {
			if !isProjectionOlder(freshness, value.Freshness) {
				value.Freshness = freshness
				value.UpdatedAt = svc.now()
				if err := svc.store.SCUMFlags().Update(value); err != nil {
					return err
				}
			}
		}
	}
	return nil
}

func scumPositionFromRow(serverID string, subjectType domain.SCUMProjectionSubject, subjectID string, row map[string]any, freshness domain.SCUMProjectionFreshnessState) (domain.SCUMCurrentPosition, bool) {
	x, hasX := firstFloat(row, "x", "worldX", "world_x", "locationX")
	y, hasY := firstFloat(row, "y", "worldY", "world_y", "locationY")
	z, hasZ := firstFloat(row, "z", "worldZ", "world_z", "locationZ")
	if !hasX || !hasY {
		return domain.SCUMCurrentPosition{}, false
	}
	if subjectID == "" {
		return domain.SCUMCurrentPosition{}, false
	}
	position := domain.SCUMCurrentPosition{ID: scumProjectionID("position-"+string(subjectType), serverID, subjectID), ServerInstanceID: serverID, SubjectType: subjectType, SubjectID: subjectID, MapID: coalesceString(firstString(row, "mapId", "map_id"), domain.SCUMMapTrajectoryMapID), MapVersion: coalesceString(firstString(row, "mapVersion", "map_version"), "0.9"), X: x, Y: y, HasCoordinates: true, LastSaveTime: firstTime(row, "lastSaveTime", "last_save_time"), Freshness: freshness}
	if hasZ && !math.IsNaN(z) {
		position.Z = z
	}
	return position, true
}

func isProjectionOlder(next, current domain.SCUMProjectionFreshnessState) bool {
	if current.Status == "" || current.Status == domain.SCUMProjectionUnknown {
		return false
	}
	if next.Source == current.Source && next.QueryKey == current.QueryKey && next.Sequence > 0 && current.Sequence > 0 && next.Sequence < current.Sequence {
		return true
	}
	return !next.ObservedAt.IsZero() && !current.ObservedAt.IsZero() && next.ObservedAt.Before(current.ObservedAt)
}

func scumObservationID(result domain.SCUMObservationResult) string {
	seed := fmt.Sprintf("%s/%s/%s/%d/%s", result.ServerInstanceID, result.PluginID, result.QueryKey, result.Sequence, result.Checksum)
	if result.Checksum == "" {
		seed = fmt.Sprintf("%s/%s/%s/%d/%s", result.ServerInstanceID, result.PluginID, result.QueryKey, result.Sequence, result.ObservedAt.Format(time.RFC3339Nano))
	}
	return "scum-observation-" + fingerprintID(result.ServerInstanceID, seed)
}

func scumProjectionID(kind, serverID, subject string) string {
	return "scum-" + kind + "-" + fingerprintID(serverID, subject)
}

func firstString(row map[string]any, keys ...string) string {
	for _, key := range keys {
		if value, ok := row[key]; ok {
			switch typed := value.(type) {
			case string:
				if trimmed := strings.TrimSpace(typed); trimmed != "" {
					return trimmed
				}
			case fmt.Stringer:
				if trimmed := strings.TrimSpace(typed.String()); trimmed != "" {
					return trimmed
				}
			case int, int64, uint64, float64:
				return fmt.Sprint(typed)
			}
		}
	}
	return ""
}

func firstFloat(row map[string]any, keys ...string) (float64, bool) {
	for _, key := range keys {
		if value, ok := row[key]; ok {
			switch typed := value.(type) {
			case float64:
				return typed, true
			case float32:
				return float64(typed), true
			case int:
				return float64(typed), true
			case int64:
				return float64(typed), true
			case uint64:
				return float64(typed), true
			case string:
				parsed, err := strconv.ParseFloat(strings.TrimSpace(typed), 64)
				if err == nil {
					return parsed, true
				}
			}
		}
	}
	return 0, false
}

func firstInt(row map[string]any, keys ...string) (int, bool) {
	value, ok := firstFloat(row, keys...)
	if !ok {
		return 0, false
	}
	return int(value), true
}

func firstBool(row map[string]any, keys ...string) (bool, bool) {
	for _, key := range keys {
		if value, ok := row[key]; ok {
			switch typed := value.(type) {
			case bool:
				return typed, true
			case string:
				parsed, err := strconv.ParseBool(strings.TrimSpace(typed))
				if err == nil {
					return parsed, true
				}
			case int:
				return typed != 0, true
			case int64:
				return typed != 0, true
			case float64:
				return typed != 0, true
			}
		}
	}
	return false, false
}

func firstTime(row map[string]any, keys ...string) time.Time {
	for _, key := range keys {
		if value, ok := row[key]; ok {
			switch typed := value.(type) {
			case time.Time:
				return typed
			case string:
				trimmed := strings.TrimSpace(typed)
				if trimmed == "" {
					continue
				}
				if parsed, err := time.Parse(time.RFC3339Nano, trimmed); err == nil {
					return parsed
				}
				if parsed, err := time.Parse("2006-01-02 15:04:05", trimmed); err == nil {
					return parsed.UTC()
				}
			case int64:
				return time.Unix(typed, 0).UTC()
			case float64:
				return time.Unix(int64(typed), 0).UTC()
			}
		}
	}
	return time.Time{}
}

func unknownRowFields(row map[string]any, known ...string) map[string]any {
	knownSet := map[string]struct{}{}
	for _, key := range known {
		knownSet[key] = struct{}{}
	}
	unknown := map[string]any{}
	for key, value := range row {
		if _, ok := knownSet[key]; ok {
			continue
		}
		unknown[key] = value
	}
	if len(unknown) == 0 {
		return nil
	}
	return domain.CopyGameClientBridgePayload(unknown)
}

func coalesceString(next, current string) string {
	if strings.TrimSpace(next) != "" {
		return strings.TrimSpace(next)
	}
	return current
}

func coalesceTime(next, current time.Time) time.Time {
	if !next.IsZero() {
		return next
	}
	return current
}

func limitSCUMProjectionSlice[T any](values *[]T, limit int) {
	if limit > 0 && len(*values) > limit {
		*values = (*values)[:limit]
	}
}