extends Node
## Comparison captures for the graphics phases G1–G6, always from the real game camera
## and the real HUD at the running window size (use 1920x1080).
## Run: godot --path . --resolution 1920x1080 res://tools/luneraria/g_views.tscn -- --out=res://docs/luneraria/screenshots/g1/nachher
## Views: 01 map, 02–04 lanes in combat, 05/06 bases, 07 grotto, 08 many units, 09 HUD,
## 10 hero selected, 11 close zoom, 12 camera in motion. Match and fixture are fixed
## (seed 4, Wurzelbund on Mid) so every phase is photographed the same way. Fixture gold
## only exists in this capture run; the rules are the ones of the running build.
const Game = preload("res://scripts/luneraria/lune_game.gd")

var out: String = "res://docs/luneraria/screenshots/g1/nachher/"
var main: Node
var shots: Array[String] = []

func _ready() -> void:
	for arg: String in OS.get_cmdline_user_args():
		if arg.begins_with("--out="):
			out = arg.substr(6)
			if not out.ends_with("/"):
				out += "/"
	call_deferred("run")

func shot(label: String, frames: int = 14) -> void:
	for i: int in frames:
		await get_tree().process_frame
	await RenderingServer.frame_post_draw
	DirAccess.make_dir_recursive_absolute(ProjectSettings.globalize_path(out))
	get_viewport().get_texture().get_image().save_png(out + label + ".png")
	shots.append(label)
	print("G_VIEW ", label)

## Camera helpers that only use public map data, so they frame old and new layouts alike.
func grotto_point(game: Node3D) -> Vector2:
	var map: LuneMap = game.match_state.map
	return map.grotto_center() if map.has_method("grotto_center") else LuneMap.GROTTO

func look(game: Node3D, at: Vector2, zoom: float) -> void:
	game.camera.look_at_point(Vector3(at.x, 0, at.y), zoom, true)

## Runs the combat clock quickly (more fixed steps per frame, rules unchanged) and holds it.
func advance_combat(game: Node3D, seconds: float) -> void:
	var state: LuneMatch = game.match_state
	game.paused = false
	while state.phase == LuneMatch.Phase.COMBAT and state.combat.elapsed < seconds:
		for i: int in range(20):
			if state.phase != LuneMatch.Phase.COMBAT or state.combat.elapsed >= seconds:
				break
			state.step_combat()
		await get_tree().process_frame
	game.paused = true

## Documentation only (not a game view): orthographic top-down plan without the HUD.
func plan_view(game: Node3D) -> void:
	var plan := Camera3D.new()
	plan.projection = Camera3D.PROJECTION_ORTHOGONAL
	plan.size = 86.0
	plan.far = 400.0
	game.add_child(plan)
	plan.position = Vector3(0, 150, 0)
	plan.rotation = Vector3(-PI * .5, 0, 0)
	plan.current = true
	game.hud.visible = false
	await shot("00-kartenplan-draufsicht", 10)
	game.hud.visible = true
	game.camera.current = true
	plan.queue_free()

func run() -> void:
	Soundscape.enabled = false
	main = load("res://scenes/luneraria.tscn").instantiate()
	add_child(main)
	var menu: MainMenu = main.menu
	while not (menu.stage.is_ready("glutpakt") and menu.stage.is_ready("wurzelbund")):
		await get_tree().process_frame
	menu.bund = "wurzelbund"
	menu.lane = "mid"
	main.start_match({"seed": 4})
	await get_tree().create_timer(.8).timeout
	var game: Node3D = main.game
	var state: LuneMatch = game.match_state
	var slot: int = game.human_slot
	# Fixture: enough gold for a hero with one item next to the starting army.
	state.players[slot].draft.gold = 900
	game._on_command({"type": "hero_buy", "hero_id": "held_ringborke"})
	game._on_command({"type": "item_buy", "item_id": "basaltschild"})
	game.hud._starter.pressed.emit()
	game.hud.show_page(0)
	game.focus_lane("mid", true)
	await shot("09-hud-planung", 24)
	game.hud.show_page(1)
	await shot("10-held-ausgewaehlt")
	game.hud.show_page(0)
	game.camera.overview(true)
	await shot("01-karte", 20)
	await plan_view(game)
	look(game, state.map.core_position(0), 26.0)
	await shot("05-eigene-basis")
	look(game, state.map.core_position(1), 26.0)
	await shot("06-gegnerbasis")
	look(game, grotto_point(game), 22.0)
	await shot("07-bossgrotte")
	game._on_ready()
	await get_tree().process_frame
	await advance_combat(game, 16.0)
	var names := {"top": "02-top-lane", "mid": "03-mid-lane", "bot": "04-bottom-lane"}
	for lane: String in LuneMap.LANES:
		game.focus_lane(lane, true)
		await shot(names[lane])
	# Camera in motion: a real, non-instant pan from Mid towards the own base.
	game.focus_lane("mid", true)
	await get_tree().process_frame
	var base: Vector2 = state.map.core_position(0)
	game.camera.look_at_point(Vector3(base.x, 0, base.y), 30.0, false)
	await shot("12-kamera-bewegt", 5)
	# Many units: all six armies at the supply cap in a round-13 wave (capture fixture).
	main.queue_free()
	await get_tree().process_frame
	var crowd: Node3D = Game.new()
	add_child(crowd)
	crowd.start({"seed": 5, "human_slot": 1})
	var crowd_state: LuneMatch = crowd.match_state
	crowd_state.round_number = 13
	for other: int in range(6):
		crowd_state.players[other].draft.gold = 100000
		crowd_state.players[other].draft.roster.clear()
		LuneBot.plan(crowd_state, other, "ausgewogen")
	crowd._on_ready()
	await get_tree().process_frame
	await advance_combat(crowd, 13.0)
	crowd.focus_lane("mid", true)
	await shot("08-kampf-viele-einheiten", 20)
	var fight: Vector2 = crowd_state.map.lane_point(0, "mid", crowd_state.map.lanes["mid"].length * .5)
	look(crowd, fight, 13.0)
	await shot("11-zoom-nah")
	print("G_VIEWS_DONE ", shots.size())
	get_tree().quit()