#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIRECTORY="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
PROJECT_DIRECTORY="$(CDPATH= cd -- "$SCRIPT_DIRECTORY/.." && pwd)"
cd "$PROJECT_DIRECTORY"

failure_count=0

fail_with_matches() {
	local label="$1"
	local matches="$2"
	if [ -n "$matches" ]; then
		printf 'ARCHITECTURE ERROR: %s\n%s\n' "$label" "$matches"
		failure_count=$((failure_count + 1))
	fi
}

if ! rg -q 'config/features=.*"Forward Plus"' project.godot; then
	fail_with_matches \
		"production project must declare Forward Plus" \
		"project.godot does not declare the Forward Plus feature"
fi

renderer_overrides="$(rg -n '^renderer/rendering_method' project.godot || true)"
fail_with_matches "production project overrides its Forward+ renderer" "$renderer_overrides"

autoload_entries="$({
	awk '
		/^\[autoload\]$/ { in_autoload = 1; next }
		/^\[/ { in_autoload = 0 }
		in_autoload && /^[^;[:space:]][^=]*=/ { print NR ":" $0 }
	' project.godot
} || true)"
fail_with_matches "custom autoloads require an ADR" "$autoload_entries"

source_directories="src tests"
if [ -d game ]; then
	source_directories="$source_directories game"
fi

duplicate_classes="$(
	rg --no-filename -o \
		'^[[:space:]]*class_name[[:space:]]+[A-Za-z_][A-Za-z0-9_]*' \
		$source_directories 2>/dev/null \
	| awk '{print $2}' \
	| sort \
	| uniq -d \
	|| true
)"
fail_with_matches "duplicate class_name declarations" "$duplicate_classes"

if [ -d game ]; then
	prototype_imports="$(rg -n 'res://(src|scenes)/' game --glob '*.gd' || true)"
	fail_with_matches "production imports prototype code or scenes" "$prototype_imports"

	test_imports="$(rg -n 'res://tests/' game --glob '*.gd' || true)"
	fail_with_matches "production imports test code" "$test_imports"

	poc_references="$(rg -n 'poc_[ab]|POC_[AB]' game --glob '*.gd' --glob '*.tscn' || true)"
	fail_with_matches "production contains a prototype dependency" "$poc_references"

	if [ -d game/domain ]; then
		domain_nodes="$(
			rg -n '^extends[[:space:]]+(Node|Node2D|Node3D|Control|CanvasLayer|CharacterBody3D|SubViewport)' \
				game/domain --glob '*.gd' || true
		)"
		fail_with_matches "domain extends scene-tree or presentation nodes" "$domain_nodes"

		domain_dependencies="$(
			rg -n 'res://game/(application|world|presentation|infrastructure|composition)/' \
				game/domain --glob '*.gd' || true
		)"
		fail_with_matches "domain depends on an outer layer" "$domain_dependencies"
	fi

	if [ -d game/application ]; then
		application_dependencies="$(
			rg -n 'res://game/(world|presentation|infrastructure|composition)/' \
				game/application --glob '*.gd' || true
		)"
		fail_with_matches "application depends on an adapter layer" "$application_dependencies"
	fi

	if [ -d game/world ]; then
		world_dependencies="$(
			rg -n 'res://game/(presentation|infrastructure|composition)/' \
				game/world --glob '*.gd' || true
		)"
		fail_with_matches "world depends on presentation or infrastructure" "$world_dependencies"
	fi

	if [ -d game/presentation ]; then
		presentation_dependencies="$(
			rg -n 'res://game/(world|infrastructure|composition)/' \
				game/presentation --glob '*.gd' || true
		)"
		fail_with_matches "presentation depends on a concrete adapter" "$presentation_dependencies"
	fi

	if [ -d game/infrastructure ]; then
		infrastructure_dependencies="$(
			rg -n 'res://game/(world|presentation|composition)/' \
				game/infrastructure --glob '*.gd' || true
		)"
		fail_with_matches "infrastructure depends on world or presentation" "$infrastructure_dependencies"
	fi

	input_violations="$(
		rg -n '\bInput\.' game --glob '*.gd' \
		| sed 's#\\#/#g' \
		| rg -v '^game/infrastructure/input/' \
		|| true
	)"
	fail_with_matches "direct Input access outside infrastructure/input" "$input_violations"
fi

if [ "$failure_count" -ne 0 ]; then
	printf 'Architecture checks: %d failure(s).\n' "$failure_count"
	exit 1
fi

printf 'Architecture checks: passed.\n'