package routers

import (
	"context"
	"sync"
)

var _ = sync.Mutex{}
var _ = context.Background

// 
// Fifth entity channel: functional NPCs at fixed city spots (shop clerks, ticket sellers, ...).
// Same four-step announce sequence as the citizen channels — this file does not invent a spawn
// path, it only supplies different coordinates. Instead of "a plot's pavement spots, how many
// decided by the hour" the positions are固定的: one per venue, already snapped onto pavement by
// the generator, so a shop clerk ends up where the shop actually is.
// What the NPC *does* is not our problem here: F-key behaviour (open a shop panel, buy a ticket,
// start a mahjong match) is driven entirely by the client's own lua through
// AgentConfig.InteractSetting. The server just has to put a body there. That is deliberate — it
// is the whole reason this card is cheap.
// Two ways in, sharing one placement helper so they can never disagree:
// • the follow loop (EnsureFunctionalNpcs) — how they normally appear: walk up to
// a shop and its clerk is standing there;
// • the panel button (SpawnFunctionalNpcsAsync) — "put them all down now".
// 
func GameRouter_FunctionalNpc_FunctionalNpcStateOf(ctx context.Context, session *GameSession) any {
	// Router implementation for GameRouter_FunctionalNpc_FunctionalNpcStateOf
	var zero any; return zero
}

// World-ready hook: start the follow loop. Idempotent; no-op when disabled.
func GameRouter_FunctionalNpc_EnsureFunctionalNpcs(ctx context.Context, session *GameSession) any {
	// Router implementation for GameRouter_FunctionalNpc_EnsureFunctionalNpcs
	var zero any; return zero
}

// Disconnect / scene switch: stop the loop. The client clears the entities itself.
func GameRouter_FunctionalNpc_StopFunctionalNpcs(ctx context.Context, session *GameSession) any {
	// Router implementation for GameRouter_FunctionalNpc_StopFunctionalNpcs
	var zero any; return zero
}

// How many the follow loop currently has standing. Panel display only.
func GameRouter_FunctionalNpc_FunctionalNpcActiveCount(ctx context.Context, session *GameSession) int32 {
	// Router implementation for GameRouter_FunctionalNpc_FunctionalNpcActiveCount
	return 0
}

func GameRouter_FunctionalNpc_RunFunctionalNpcLoopAsync(ctx context.Context, session *GameSession, owner any, token context.Context) any {
	// Router implementation for GameRouter_FunctionalNpc_RunFunctionalNpcLoopAsync
	var zero any; return zero
}

func GameRouter_FunctionalNpc_TickFunctionalNpcsAsync(ctx context.Context, session *GameSession, owner any, cfg any) any {
	// Router implementation for GameRouter_FunctionalNpc_TickFunctionalNpcsAsync
	var zero any; return zero
}

func GameRouter_FunctionalNpc_RemoveFunctionalNpcAsync(ctx context.Context, session *GameSession, state any, owner any, id uint64, spot any) any {
	// Router implementation for GameRouter_FunctionalNpc_RemoveFunctionalNpcAsync
	var zero any; return zero
}

// 
// ★★★ R93（2026-09-27）—— **落脚高度吸附**：把点位声明的 Y 换成「该 XZ 上真实地面/物件的高度」。
// 为什么必须做：FunctionalNpcSpots.json 的 Y 是用 CivilianDistricts 人行道点
// 反向找的（见该文件 note）。那套人行道点只在**主城平地**有数据，一旦点位的 XZ 落在
// **高台/庙会/室内**，找出来的就是别处（常常是 y≈0/2 那一层）的 Y。
// 实测标本（2026-09-27）：Tea Shop Owner(40954014)/Tea Stall Owner(40954022) 声明 Y=2.00，
// 而同 XZ 上 2528 件场景物一律 **y≈166~172** ⇒ NPC 被生成在**地下 167 m**，
// 现象 = 用户所说的「摊位的npc呢」（看着像根本没刷，其实刷了、埋了）。
// 数据源 = config/scene_item_placements.json（mtime 热重载，4877 件带真实 y）。
// 取点位 XZ **半径  内最近的若干件**的 y 中位数当落脚高度：
// 中位数对「同一点位旁边既有台面又有地面」的情况比最近邻稳。
// 命中不到（荒地/新点位）⇒ **原样返回**，绝不猜。
// 
func GameRouter_FunctionalNpc_SnapGroundY(ctx context.Context, x float32, y float32, z float32, samples int32, snapped float32, radius float32) float32 {
	// Router implementation for GameRouter_FunctionalNpc_SnapGroundY
	return 0
}

// 
// One placement: announce + remember. Returns the entity id, or 0 when the spot's ids are not
// in the catalogs (a bad row in the json must not kill the batch).
// 
func GameRouter_FunctionalNpc_PlaceFunctionalNpcAsync(ctx context.Context, session *GameSession, state any, owner any, spot any) uint64 {
	// Router implementation for GameRouter_FunctionalNpc_PlaceFunctionalNpcAsync
	return 0
}

// 
// Panel button: place every functional NPC of the current scene (nearest first when a radius
// is given, radius <= 0 = the whole scene). Anything already standing is skipped.
// 
func GameRouter_FunctionalNpc_SpawnFunctionalNpcsAsync(ctx context.Context, session *GameSession, radius float32, includeSemantic bool) any {
	// Router implementation for GameRouter_FunctionalNpc_SpawnFunctionalNpcsAsync
	var zero any; return zero
}

func GameRouter_FunctionalNpc_Distance2(ctx context.Context, spot any, x float32, z float32) float32 {
	// Router implementation for GameRouter_FunctionalNpc_Distance2
	return 0
}

type FunctionalNpcSessionState struct {
	SyncRoot any `json:"syncRoot"`
	Cts *context.CancelFunc `json:"cts"`
	Loop *any `json:"loop"`
// entityId -> the spot it was placed for. Doubles as the "already placed" set.
	Active map[uint64]FunctionalNpcSpot4229938 `json:"active"`
// 
// Formwork ids whose placement has been started but not finished yet.
// ⛑ Placement awaits several network writes and happens OUTSIDE the lock, so a tick that
// starts while the previous batch is still in flight cannot see it in Active
// and would place the same clerk again — two identical NPCs stacked on one spot.
// 
	Pending []uint32 `json:"pending"`
// Scene the Active entries belong to; a change wipes them.
	Raid uint32 `json:"raid"`
}