extends RefCounted

## Catalogue site « Jardin des Formes »: one quarter per reference landform
## (docs/briefs/terrain-varied-landforms.md §5). No wreck, no route; a single
## mooring beacon at the centre. Field 512 x 512 m at 1 m, +X east, +Z south.

const SiteTerrainBaker = preload("res://tools/site_terrain_baker.gd")
const SiteTerrainData = preload("res://game/domain/sites/site_terrain_data.gd")
const DiveSiteDefinition = preload("res://game/domain/sites/dive_site_definition.gd")
const SitePlacement = preload("res://game/domain/sites/site_placement.gd")

# North-west: stratified canyon cut through a mesa.
const MESA_CENTRE := Vector2(-120.0, -130.0)
const CANYON_PATH: Array[Vector2] = [
	Vector2(-205.0, -85.0), Vector2(-150.0, -120.0), Vector2(-110.0, -150.0), Vector2(-60.0, -200.0),
]
const CANYON_HALF_WIDTH_M := 14.0
const CANYON_DEPTH_M := 20.0
# North-east: crevasse between two buttes.
const WEST_BUTTE_CENTRE := Vector2(80.0, -120.0)
const EAST_BUTTE_CENTRE := Vector2(165.0, -125.0)
const CREVASSE_PATH: Array[Vector2] = [
	Vector2(122.0, -200.0), Vector2(118.0, -160.0), Vector2(124.0, -120.0), Vector2(119.0, -80.0), Vector2(123.0, -40.0),
]
const CREVASSE_HALF_WIDTH_M := 3.0
const CREVASSE_DEPTH_M := 20.0
# South-west: boulder field on rippled sand.
const BOULDER_FIELD_CENTRE := Vector2(-120.0, 110.0)
const BOULDER_FIELD_RADIUS_M := 75.0
# South-east: two rock spurs framing a sand channel.
const WEST_SPUR_CENTRE := Vector2(80.0, 120.0)
const EAST_SPUR_CENTRE := Vector2(170.0, 125.0)
const CHANNEL_CENTRE := Vector2(125.0, 120.0)
# South: sinuous escarpment with rounded knolls on the slope below.
const ESCARPMENT_PATH: Array[Vector2] = [
	Vector2(-270.0, 215.0), Vector2(-150.0, 205.0), Vector2(-40.0, 225.0), Vector2(60.0, 205.0),
	Vector2(170.0, 228.0), Vector2(270.0, 210.0),
]
const ESCARPMENT_DROP_M := 22.0


static func recipe() -> SiteTerrainBaker.Recipe:
	var result := SiteTerrainBaker.Recipe.new()
	result.columns = 513
	result.rows = 513
	result.cell_size_m = 1.0
	result.origin_x_m = -256.0
	result.origin_z_m = -256.0
	result.floor_elevation_m = -80.0
	result.rock_slope_degrees = 20.0
	result.rock_reflectivity = 0.72
	result.sand_reflectivity = 0.45
	result.primitives = [
		# Base plateau: 30 m deep at the centre, 4 m deeper over the 500 m southward.
		SiteTerrainBaker.SlopedPlane.new(30.0, 0.0, -0.008, 0.0, 0.0),

		# NW — la Mesa fendue: flat rock plateau 6 m high, 20 m deep canyon with a
		# 14 m wide flat floor, 55 degree walls cut into 4 m ledges by the Strata
		# modifier (one ledge every 2.8 m across, resolvable at 1 m per cell), rippled
		# sand on the floor.
		SiteTerrainBaker.Outcrop.new(MESA_CENTRE, 95.0, 85.0, 6.0, 10.0, 101, 6.0, true),
		SiteTerrainBaker.Canyon.new(PackedVector2Array(CANYON_PATH), CANYON_HALF_WIDTH_M, CANYON_DEPTH_M, 7.0, 102, 2.0),
		SiteTerrainBaker.Ripples.new(Vector2(0.8, -0.6), 4.0, 0.25, Vector2(-130.0, -140.0), 70.0),

		# NE — la Fente: two buttes 8-9 m high with a 6 m wide, 20 m deep slot between them.
		SiteTerrainBaker.Outcrop.new(WEST_BUTTE_CENTRE, 38.0, 70.0, 8.0, 8.0, 201, 5.0, true),
		SiteTerrainBaker.Outcrop.new(EAST_BUTTE_CENTRE, 38.0, 75.0, 9.0, 8.0, 202, 5.0, true),
		SiteTerrainBaker.Canyon.new(PackedVector2Array(CREVASSE_PATH), CREVASSE_HALF_WIDTH_M, CREVASSE_DEPTH_M, 1.0, 203, 1.0),

		# SW — le Chaos: ninety boulders 2-6 m across plus six coral heads, on rippled sand.
		SiteTerrainBaker.BoulderField.new(BOULDER_FIELD_CENTRE, BOULDER_FIELD_RADIUS_M, 301, 90, 2.0, 6.0, 0.7),
		SiteTerrainBaker.BoulderField.new(Vector2(-100.0, 130.0), 40.0, 302, 6, 6.0, 9.0, 0.6),
		SiteTerrainBaker.Ripples.new(Vector2(1.0, 0.3), 3.5, 0.3, BOULDER_FIELD_CENTRE, 110.0),

		# SE — les Éperons: two pitted rock spurs 6-7 m high framing a 20 m sand channel
		# littered with small blocks.
		SiteTerrainBaker.Outcrop.new(WEST_SPUR_CENTRE, 30.0, 60.0, 7.0, 5.0, 401, 7.0, true),
		SiteTerrainBaker.Outcrop.new(EAST_SPUR_CENTRE, 30.0, 55.0, 6.0, 5.0, 402, 7.0, true),
		SiteTerrainBaker.BoulderField.new(CHANNEL_CENTRE, 50.0, 403, 12, 1.5, 3.0, 0.8),

		# S — la Corniche: sinuous 22 m escarpment, then a 42 degree slope to the 80 m floor,
		# with rounded knolls on the slope.
		SiteTerrainBaker.Escarpment.new(PackedVector2Array(ESCARPMENT_PATH), ESCARPMENT_DROP_M, 6.0, 0.9, 501, 8.0),
		SiteTerrainBaker.Outcrop.new(Vector2(-60.0, 240.0), 12.0, 10.0, 5.0, 10.0, 502, 2.0, true),
		SiteTerrainBaker.Outcrop.new(Vector2(40.0, 236.0), 10.0, 9.0, 4.0, 9.0, 503, 2.0, true),
		SiteTerrainBaker.Outcrop.new(Vector2(130.0, 245.0), 14.0, 11.0, 6.0, 11.0, 504, 2.0, true),

		# Roughness: broad undulation plus cell-scale pitting.
		SiteTerrainBaker.Roughness.new(1933, 0.02, 0.6),
		SiteTerrainBaker.Roughness.new(2027, 0.15, 0.2),
	]
	result.modifiers = [
		# Strata on the mesa flanks and canyon walls only: 4 m ledges.
		SiteTerrainBaker.Strata.new(4.0, 0.85, 30.0, 50.0, MESA_CENTRE, 130.0),
	]
	return result


static func definition(terrain: SiteTerrainData) -> DiveSiteDefinition:
	var result := DiveSiteDefinition.new()
	result.site_id = &"terrain_showcase"
	result.display_name = "Jardin des Formes"
	result.terrain = terrain
	result.playable_bounds_m = Rect2(-220.0, -220.0, 440.0, 440.0)
	result.spawn_position_m = Vector3(0.0, -12.0, 0.0)
	result.spawn_yaw_radians = 0.0
	var anchor := SitePlacement.new()
	anchor.placement_id = &"vessel_anchor"
	anchor.kind = SitePlacement.Kind.VESSEL_ANCHOR
	anchor.position_m = Vector3(0.0, -16.0, 0.0)
	result.placements = [anchor]
	return result