package world

import (
	"gopkg.in/yaml.v3"
	"thehouseoficarus/internal/behavior"
)

type ExitDir string

const (
	North ExitDir = "north"
	South ExitDir = "south"
	East  ExitDir = "east"
	West  ExitDir = "west"
	Up    ExitDir = "up"
	Down  ExitDir = "down"
)

var ExitAliases = map[string]ExitDir{
	"n": North,
	"s": South,
	"e": East,
	"w": West,
	"u": Up,
	"d": Down,
}

var OppositeExit = map[ExitDir]ExitDir{
	North: South,
	South: North,
	East:  West,
	West:  East,
	Up:    Down,
	Down:  Up,
}

var ExitOrder = []ExitDir{
	North, South, East, West, Up, Down,
}

type SpawnDef struct {
	ID           string  `yaml:"id"`
	Quantity     int     `yaml:"quantity"`
	RespawnTicks float64 `yaml:"respawn_ticks"`
}

type ExitDef struct {
	Room           int                 `yaml:"room"`
	Condition      *behavior.Condition `yaml:"condition"`
	BlockedMessage string              `yaml:"blocked_message"`
	SetFlags       map[string]any      `yaml:"set_flags"`
	SetPlayerFlags map[string]any      `yaml:"set_player_flags"`
}

func (e *ExitDef) UnmarshalYAML(value *yaml.Node) error {
	if value.Kind == yaml.ScalarNode {
		var n int
		if err := value.Decode(&n); err != nil {
			return err
		}
		e.Room = n
		return nil
	}
	type raw ExitDef
	return value.Decode((*raw)(e))
}

type Room struct {
	ID          int                 `yaml:"id"`
	Name        string              `yaml:"name"`
	Description behavior.DescList   `yaml:"description"`
	Exits       map[ExitDir]ExitDef `yaml:"exits"`
	Objects     []RoomObject        `yaml:"objects"`
	ItemSpawns  []SpawnDef          `yaml:"item_spawns"`
	Mobs        []RoomMob           `yaml:"mobs"`
	OnEnter     []EnterStep         `yaml:"on_enter"`
	Hazard      string              `yaml:"hazard"`
	Triggers    []TriggerDef        `yaml:"triggers"`
}

type RoomMob struct {
	ID             string  `yaml:"id"`
	WanderRooms    []int   `yaml:"wander_rooms"`
	WanderInterval float64 `yaml:"wander_interval"`
}

func (rm *RoomMob) UnmarshalYAML(value *yaml.Node) error {
	if value.Kind == yaml.ScalarNode {
		var s string
		if err := value.Decode(&s); err != nil {
			return err
		}
		rm.ID = s
		return nil
	}
	type raw RoomMob
	return value.Decode((*raw)(rm))
}

type EnterStep struct {
	Message        string              `yaml:"message"`
	Condition      *behavior.Condition `yaml:"condition"`
	Delay          int                 `yaml:"delay"`
	SetFlags       map[string]any      `yaml:"set_flags"`
	SetPlayerFlags map[string]any      `yaml:"set_player_flags"`
	Broadcast       string          `yaml:"broadcast"`
	BroadcastGlobal string          `yaml:"broadcast_global"`
	SpawnMob        *SpawnMobConfig `yaml:"spawn_mob"`
	DespawnMob      string          `yaml:"despawn_mob"`
	GiveItem        string          `yaml:"give_item"`
	TakeItem        string          `yaml:"take_item"`
	Teleport        int             `yaml:"teleport"`
	Heal            int             `yaml:"heal"`
}

// IsTimed reports whether the step carries enter-sequence semantics (any
// non-zero field means it needs per-tick scheduling rather than synchronous
// printing).
func (e EnterStep) IsTimed() bool {
	return e.Delay > 0 || len(e.SetFlags) > 0 || len(e.SetPlayerFlags) > 0 ||
		e.Message != "" || e.Broadcast != "" || e.BroadcastGlobal != "" ||
		e.SpawnMob != nil || e.DespawnMob != "" || e.GiveItem != "" ||
		e.TakeItem != "" || e.Teleport != 0 || e.Heal != 0
}

type RoomObject struct {
	ID             string  `yaml:"id"`
	WanderRooms    []int   `yaml:"wander_rooms"`
	WanderInterval float64 `yaml:"wander_interval"`
}