extends Node3D

# ═══════════════════════════════════════════════════════════════
# HEX-DIAMANT-INSEL — Blockout
# Krone (begehbar): flaches 6-Eck-Tisch + 6 Trapez-Facetten zur Rundiste
# Pavillon (rein optisch): steile 6-seitige Pyramide unter der Rundiste
# ═══════════════════════════════════════════════════════════════

@export var table_radius    : float = 80.0    # flaches Sechseck in der Mitte
@export var girdle_radius   : float = 260.0   # äußerer Sechseck-Rand (Rundiste)
@export var crown_drop      : float = 30.0    # Höhenabfall Tisch -> Rundiste
@export var pavilion_depth  : float = 190.0   # Höhenabfall Rundiste -> Spitze
@export var angle_offset_deg: float = 0.0

@export var border_spacing : float = 18.0   # Abstand zwischen Grenz-Props entlang eines Grats
@export var border_jitter  : float = 3.0    # zufälliger seitlicher Versatz

const COLOR_TABLE    := Color(0.75, 0.74, 0.70)
const COLOR_FACET_A  := Color(0.55, 0.55, 0.48)
const COLOR_FACET_B  := Color(0.49, 0.49, 0.43)
const COLOR_PAVILION := Color(0.30, 0.28, 0.26)

# Grenz-Props: gleiche Modelle + Skalierung + Hitbox-Maße wie in main.tscn
const MOUNTAIN_SCENE  := preload("res://assets/models/mountain.glb")
const MOUNTAIN2_SCENE := preload("res://assets/models/mountain2v5.glb")
const FOREST_SCENE    := preload("res://assets/models/forest.glb")

const MOUNTAIN_SCALE  := 0.1
const MOUNTAIN2_SCALE := 0.05
const FOREST_SCALE    := 0.2

func _ready() -> void:
	_build_crown()
	_build_pavilion()
	_build_region_borders()

func _hex_angle(k: int) -> float:
	return deg_to_rad(angle_offset_deg) + float(k) / 6.0 * TAU

func _add_tri(st: SurfaceTool, a: Vector3, b: Vector3, c: Vector3, col: Color) -> void:
	var n := (b - a).cross(c - a).normalized()
	for v in [a, b, c]:
		st.set_normal(n)
		st.set_color(col)
		st.add_vertex(v)

# ═══════════════════════════════════════════════
# KRONE — Tisch + 6 Facetten (begehbar, mit Kollision)
# ═══════════════════════════════════════════════
func _build_crown() -> void:
	var st := SurfaceTool.new()
	st.begin(Mesh.PRIMITIVE_TRIANGLES)

	var center := Vector3.ZERO
	var table_pts  : Array[Vector3] = []
	var girdle_pts : Array[Vector3] = []
	for k in range(6):
		var a := _hex_angle(k)
		table_pts.append(Vector3(cos(a) * table_radius, 0.0, sin(a) * table_radius))
		girdle_pts.append(Vector3(cos(a) * girdle_radius, -crown_drop, sin(a) * girdle_radius))

	# Tisch-Fan (Zentrum-Region)
	for k in range(6):
		var k1 := (k + 1) % 6
		_add_tri(st, center, table_pts[k1], table_pts[k], COLOR_TABLE)

	# 6 Facetten (Außenregionen), abwechselnd eingefärbt für sichtbare Nähte
	for k in range(6):
		var k1 := (k + 1) % 6
		var col := COLOR_FACET_A if k % 2 == 0 else COLOR_FACET_B
		_add_tri(st, table_pts[k],  table_pts[k1],  girdle_pts[k], col)
		_add_tri(st, table_pts[k1], girdle_pts[k1], girdle_pts[k], col)

	var mesh := st.commit()
	var mat := StandardMaterial3D.new()
	mat.vertex_color_use_as_albedo = true
	mat.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
	mat.cull_mode = BaseMaterial3D.CULL_DISABLED
	mesh.surface_set_material(0, mat)

	var body := StaticBody3D.new()
	body.name = "Crown"
	var mi := MeshInstance3D.new()
	mi.mesh = mesh
	body.add_child(mi)
	var cs := CollisionShape3D.new()
	cs.shape = mesh.create_trimesh_shape()
	body.add_child(cs)
	add_child(body)

# ═══════════════════════════════════════════════
# PAVILLON — Pyramide unter der Rundiste (rein optisch)
# ═══════════════════════════════════════════════
func _build_pavilion() -> void:
	var st := SurfaceTool.new()
	st.begin(Mesh.PRIMITIVE_TRIANGLES)

	var apex := Vector3(0, -crown_drop - pavilion_depth, 0)
	var girdle_pts: Array[Vector3] = []
	for k in range(6):
		var a := _hex_angle(k)
		girdle_pts.append(Vector3(cos(a) * girdle_radius, -crown_drop, sin(a) * girdle_radius))

	for k in range(6):
		var k1 := (k + 1) % 6
		_add_tri(st, girdle_pts[k], girdle_pts[k1], apex, COLOR_PAVILION)

	var mesh := st.commit()
	var mat := StandardMaterial3D.new()
	mat.vertex_color_use_as_albedo = true
	mat.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
	mat.cull_mode = BaseMaterial3D.CULL_DISABLED
	mesh.surface_set_material(0, mat)

	var mi := MeshInstance3D.new()
	mi.name = "Pavilion"
	mi.mesh = mesh
	add_child(mi)

# ═══════════════════════════════════════════════
# GRENZEN — Berg/Wald entlang der 6 Grate zwischen den Regionen
# Grat k = Strecke von Tisch-Ecke T[k] zu Rundiste-Ecke G[k]
# (gemeinsame Kante von Facette k-1 und Facette k)
# ═══════════════════════════════════════════════
func _build_region_borders() -> void:
	var borders := Node3D.new()
	borders.name = "Borders"
	add_child(borders)

	for k in range(6):
		var a := _hex_angle(k)
		var dir := Vector3(cos(a), 0.0, sin(a))
		var perp := Vector3(-dir.z, 0.0, dir.x)

		var t := table_radius
		while t <= girdle_radius:
			var frac := (t - table_radius) / (girdle_radius - table_radius)
			var pos := dir * t
			pos.y = lerp(0.0, -crown_drop, frac)
			pos += perp * randf_range(-border_jitter, border_jitter)

			_place_border_prop(borders, pos)
			t += border_spacing + randf_range(-4.0, 4.0)

func _place_border_prop(parent: Node3D, pos: Vector3) -> void:
	var roll := randf()
	var inst: Node3D
	var scale_factor: float
	var shape: Shape3D

	if roll < 0.4:
		inst = MOUNTAIN_SCENE.instantiate() as Node3D
		scale_factor = MOUNTAIN_SCALE
		var cap := CapsuleShape3D.new()
		cap.radius = 7.0
		cap.height = 20.0
		shape = cap
	elif roll < 0.7:
		inst = MOUNTAIN2_SCENE.instantiate() as Node3D
		scale_factor = MOUNTAIN2_SCALE
		var cap2 := CapsuleShape3D.new()
		cap2.radius = 8.5078125
		cap2.height = 17.015625
		shape = cap2
	else:
		inst = FOREST_SCENE.instantiate() as Node3D
		scale_factor = FOREST_SCALE
		var cyl := CylinderShape3D.new()
		cyl.radius = 0.72021484
		cyl.height = 2.2817383
		shape = cyl

	inst.position = pos
	inst.rotation.y = randf() * TAU
	inst.scale = Vector3.ONE * scale_factor

	var cs := CollisionShape3D.new()
	cs.shape = shape
	inst.add_child(cs)

	parent.add_child(inst)