/*
This file is part of »ivaldi«.

Copyright 2025 'Fenris Wolf' <fenris@folksprak.org>

»ivaldi« is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

»ivaldi« is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with »ivaldi«. If not, see <http://www.gnu.org/licenses/>.
 */

namespace _ivaldi
{
	
	/**
	 */
	function refine_definition(
		definition_raw : any
	) : _ivaldi.type_definition
	{
		return {
			"version": definition_raw["version"],
			"name": definition_raw["name"],
			"target": (
				definition_raw["target"]
				??
				"node"
			),
			"settings": {
				"typescript": {
					"command": (((definition_raw["settings"] ?? {})["typescript"] ?? {})["command"] ?? "tsc"),
					"libs": (((definition_raw["settings"] ?? {})["typescript"] ?? {})["libs"] ?? ["es2020"]),
				},
			},
			"directories": {
				"lib": (
					(definition_raw["misc"] ?? {})["lib"]
					??
					"lib"
				),
				"source": (
					(definition_raw["misc"] ?? {})["source"]
					??
					"source"
				),
				"misc": (
					(definition_raw["misc"] ?? {})["misc"]
					??
					"misc"
				),
			},
			"libs": ((libs_raw) => ({
				"plankton": (libs_raw["plankton"] ?? null),
				"node": (libs_raw["node"] ?? null),
			})) (definition_raw["libs"] ?? {}),
			"core": definition_raw["core"],
			"apps": (
				definition_raw["apps"].map(
					(app_raw : Record<string, any>) => (
						{
							"name": app_raw["name"],
							"sources": app_raw["sources"],
							"additional_dependencies": (app_raw["additional_dependencies"] ?? []),
							"destination": (app_raw["destination"] ?? "{{project}}-{{app}}"),
							"head": (app_raw["head"] ?? null),
							"executable": (app_raw["executable"] ?? false),
						}
					)
				)
			),
			"custom_rules": (
				(definition_raw["custom_rules"] ?? []).map(
					(custom_rule_raw : Record<string, any>) => (
						{
							"targets": custom_rule_raw["targets"],
							"dependencies": custom_rule_raw["dependencies"],
							"actions": custom_rule_raw["actions"],
							"info": (custom_rule_raw["info"] ?? null),
						}
					)
				)
			),
		};
	}


	/**
	 */
	function get_target_name(
		app_name : string
	) : string
	{
		return lib_plankton.string.coin(
			"app-{{name}}",
			{
				"name": app_name,
			}
		);
	}


	/**
	 */
	function get_temp_directory(
		definition : _ivaldi.type_definition,
		pattern : string
	) : string
	{
		return lib_plankton.string.coin(
			pattern,
			{
				"project": definition.name,
			}
		);
	}


	/**
	 */
	function get_build_directory(
		definition : _ivaldi.type_definition,
		pattern : string
	) : string
	{
		return lib_plankton.string.coin(
			pattern,
			{
				"project": definition.name,
			}
		);
	}


	/**
	 */
	async function action_fetch(
		definition : _ivaldi.type_definition
	) : Promise<void>
	{
		// plankton
		{
			if (definition.libs.plankton === null)
			{
				// do nothing
			}
			else
			{
				const directory : string = lib_plankton.string.coin(
					"{{directory}}/plankton",
					{
						"directory": definition.directories.lib,
					}
				);
				/**
				 * @todo do not use "_ivaldi.execute" for that
				 */
				await _ivaldi.execute(
					_ivaldi.command_mkdir(directory),
				);
				await _ivaldi.execute(
					_ivaldi.command_ptk_bundle(definition.target, definition.libs.plankton),
					{
						"working_directory": directory,
					}
				);
			}
		}
		// node
		{
			if (definition.libs.node === null)
			{
				// do nothing
			}
			else
			{
				const directory : string = lib_plankton.string.coin(
					"{{directory}}/node",
					{
						"directory": definition.directories.lib,
					}
				);
				/**
				 * @todo do not use "_ivaldi.execute" for that
				 */
				await _ivaldi.execute(
					_ivaldi.command_mkdir(directory)
				);
				await _ivaldi.execute(
					_ivaldi.command_npm_install(definition.libs.node),
					{
						"working_directory": directory,
					}
				);
			}
		}
	}


	/**
	 */
	async function action_clear(
		definition : _ivaldi.type_definition,
		temp_directory_pattern : string,
		build_directory_pattern : string
	) : Promise<void>
	{
		const commands : Array<string> = [
			_ivaldi.command_delete(get_temp_directory(definition, temp_directory_pattern)),
			_ivaldi.command_delete(get_build_directory(definition, build_directory_pattern)),
		];
		/**
		 * @todo do not use "_ivaldi.execute" for that
		 */
		for (const command of commands)
		{
			await _ivaldi.execute(command);
		}
	}


	/**
	 */
	async function action_build(
		definition : _ivaldi.type_definition,
		assets : Array<{from : string; to : string;}>,
		temp_directory_pattern : string,
		build_directory_pattern : string,
		makefile_path_pattern : string,
		targets : (null | Array<string>),
		{
			"show_actions": show_actions = true,
		}
		:
		{
			show_actions ?: boolean
		}
		=
		{
		}
	) : Promise<void>
	{
		const temp_directory : string = get_build_directory(definition, temp_directory_pattern);
		const build_directory : string = get_build_directory(definition, build_directory_pattern);

		// makefile stuff
		{
			const has_plankton : boolean = ((definition.libs.plankton !== null) && (definition.libs.plankton.length > 0));
			const has_node : boolean = ((definition.libs.node !== null) && (definition.libs.node.length > 0));

			const path_plankton_declaration : string = lib_plankton.string.coin(
				"{{directory_libs}}/plankton/plankton.d.ts",
				{
					"directory_libs": definition.directories.lib,
				}
			);
			const path_plankton_implementation : string = lib_plankton.string.coin(
				"{{directory_libs}}/plankton/plankton.js",
				{
					"directory_libs": definition.directories.lib,
				}
			);
			const path_core_declaration : string = lib_plankton.string.coin(
				"{{directory_temp}}/core-unlinked.d.ts",
				{
					"directory_temp": temp_directory,
				}
			);
			const path_core_implementation : string = lib_plankton.string.coin(
				"{{directory_temp}}/core-unlinked.js",
				{
					"directory_temp": temp_directory,
				}
			);

			const gnu_make_sheet : lib_plankton.gnu_make.type_sheet = {
				"rules": (
					(new Array<Array<lib_plankton.gnu_make.type_rule>>)
					// root
					.concat(
						[
							{
								"kind": "meta",
								"data": {
									"phony": true,
									"name": "_root",
									"dependencies": definition.apps.map((app : _ivaldi.type_app) => get_target_name(app.name)),
								}
							},
						]
					)
					// node modules
					.concat(
						has_node
						?
						[
							{
								"kind": "concrete",
								"data": {
									"targets": [
										"node_modules"
									],
									"dependencies": [],
									"actions": [
										_ivaldi.command_log("placing node modules …"),
										_ivaldi.command_mkdir(
											lib_plankton.string.coin("{{directory}}/node_modules", {"directory": build_directory})
										),
										_ivaldi.command_copy(
											lib_plankton.string.coin("{{directory}}/node/node_modules/*", {"directory": definition.directories.lib}),
											lib_plankton.string.coin("{{directory}}/node_modules/", {"directory": build_directory})
										)
									]
								}
							},
						]
						:
						[]
					)
					// custom rules
					.concat(
						[
							definition.custom_rules
							.map(
								custom_rule => ({
									"kind": "concrete",
									"data": {
										"targets": (
											custom_rule.targets
											.map(
												target => lib_plankton.string.coin(
													target,
													{
														"dir_build": build_directory,
													}
												)
											)
										),
										"dependencies": (
											custom_rule.dependencies.map(
												dependency => lib_plankton.string.coin(
													dependency,
													{
														"dir_source": definition.directories.source,
														"dir_misc": definition.directories.misc,
													}
												),
											)
										),
										"actions": (
											(new Array<string>())
											.concat(
												(custom_rule.info === null)
												?
												[]
												:
												[
													_ivaldi.command_log(
														lib_plankton.string.coin(
															"{{info}} …",
															{
																"info": custom_rule.info,
															}
														),
													)
												]
											)
											.concat(
												/**
												 * @todo coin?
												 */
												custom_rule.actions
											)
										),
									}
								})
							)
						]
					)
					// core
					.concat(
						[
							[
								{
									"kind": "concrete",
									"data": {
										"targets": [
											path_core_declaration,
											path_core_implementation,
										],
										"dependencies": (
											(new Array<string>())
											.concat(has_plankton ? [path_plankton_declaration] : [])
											.concat(
												definition.core.map(
													path => lib_plankton.string.coin(
														"{{directory}}/{{path}}",
														{
															"directory": definition.directories.source,
															"path": path,
														}
													)
												)
											)
										),
										"actions": [
											// log
											_ivaldi.command_log("core | compiling …"),
											// mkdir
											_ivaldi.command_mkdir("$(dir $@)"),
											// command
											_ivaldi.command_tsc(
												["$^"],
												path_core_implementation,
												{
													"declaration": true,
													"head": definition.settings.typescript.command,
													"libs": definition.settings.typescript.libs,
												}
											),
										]
									}
								},
							]
						]
					)
					// apps
					.concat(
						definition.apps
						.map(
							app => {
								const paths_sources : Array<string> = (
									app.sources
									.map(
										source => lib_plankton.string.coin(
											"{{directory}}/{{name}}",
											{
												"directory": definition.directories.source,
												"name": source,
											}
										)
									)
								);
								const path_app_unlinked : string = lib_plankton.string.coin(
									"{{directory_temp}}/app-{{name}}-unlinked.js",
									{
										"directory_temp": temp_directory,
										"name": app.name,
									}
								);
								const path_app_complete : string = lib_plankton.string.coin(
									"{{directory_build}}/{{destination}}",
									{
										"directory_build": build_directory,
										"destination": lib_plankton.string.coin(
											app.destination,
											{
												"project": definition.name,
												"app": app.name,
											}
										),
									}
								);
								return [
									// compile
									{
										"kind": "concrete",
										"data": {
											"targets": [
												path_app_unlinked,
											],
											"dependencies": (
												(new Array<string>())
												.concat(has_plankton ? [path_plankton_declaration] : [])
												.concat([path_core_declaration])
												.concat(paths_sources)
											),
											"actions": [
												_ivaldi.command_log(lib_plankton.string.coin("app:{{name}} | compiling …", {"name": app.name})),
												_ivaldi.command_mkdir("$(dir $@)"),
												_ivaldi.command_tsc(
													["$^"],
													"$@",
													{
														"head": definition.settings.typescript.command,
														"libs": definition.settings.typescript.libs,
													}
												),
											]
										}
									},
									// link
									{
										"kind": "concrete",
										"data": {
											"targets": [
												path_app_complete,
											],
											"dependencies": (
												(new Array<string>())
												.concat(has_plankton ? [path_plankton_implementation] : [])
												.concat([path_core_implementation])
												.concat([path_app_unlinked])
											),
											"actions": (
												(new Array<string>())
												.concat(
													[
														_ivaldi.command_log(lib_plankton.string.coin("app:{{name}} | linking …", {"name": app.name})),
														_ivaldi.command_mkdir("$(dir $@)"),
														lib_plankton.string.coin("echo '{{head}}' > {{path}}", {"head": (app.head ?? ""), "path": path_app_complete}),
														_ivaldi.command_cat(["$^"], "$@", {"append": true}),
													]
												)
												// make executable
												.concat(
													(
														app.executable
														?
														[
															/**
															 * @todo _ivaldi.command_
															 */
															"chmod +x $@",
														]
														:
														[
														]
													)
												)
											)
										},
									},
									// facade
									{
										"kind": "meta",
										"data": {
											"phony": true,
											"name": get_target_name(app.name),
											"dependencies": (
												(new Array<string>())
												.concat(has_node ? ["node_modules"] : [])
												.concat([path_app_complete])
												// additional dependencies
												.concat(
													app.additional_dependencies
													.map(
														dependency => lib_plankton.string.coin(
															dependency,
															{
																"dir_source": definition.directories.source,
																"dir_misc": definition.directories.misc,
																"dir_temp": temp_directory,
																"dir_build": build_directory,
															}
														)
													)
												)
											),
										},
									},
								];
							}
						)
					)
					.reduce(
						(x, y) => x.concat(y),
						[]
					)
				),
			};
			const makefile_content : string = lib_plankton.gnu_make.render_sheet(
				gnu_make_sheet,
				{
					"break_dependencies": true,
					"silent_actions": (! show_actions),
				}
			);
			const makefile_path : string = lib_plankton.string.coin(
				makefile_path_pattern,
				{
					"project": definition.name,
				}
			);
			await lib_plankton.file.write(
				makefile_path,
				makefile_content
			);
			const command : string = lib_plankton.string.coin(
				"make --file={{path}} {{targets}}",
				{
					"path": makefile_path,
					"targets": (
						(targets === null)
						?
						""
						:
						targets.map(target => get_target_name(target)).join(" ")
					),
				}
			);
			const result = await _ivaldi.execute(command);
			process.stdout.write(result.stdout + "\n");
			process.stderr.write(result.stderr + "\n");
		}
		// assets
		{
			const commands : Array<string> = assets.map(
				asset => _ivaldi.command_copy(
					asset.from,
					lib_plankton.string.coin("{{directory}}/{{path}}", {"directory": build_directory, "path": asset.to})
				)
			);
			for (const command of commands)
			{
				await _ivaldi.execute(command);
			}
		}
	}
	

	/**
	 */
	/*
	async function action_deploy(
		definition : _ivaldi.type_definition,
		build_directory_pattern : string,
		deploy_system : string,
		deploy_directory : string
	) : Promise<void>
	{
		const command : string = lib_plankton.string.coin(
			"rsync --recursive --update{{excludes}} {{from}}/ {{to_system}}:{{to_directory}}",
			{
				"from": get_build_directory(definition, build_directory_pattern),
				"to_system": deploy_system,
				"to_directory": deploy_directory,
			}
		);
		await _ivaldi.execute(command);
	}
	*/
	
	
	/**
	 */
	export async function main(
		args_raw : Array<string>
	) : Promise<void>
	{
		// args
		const arg_handler : lib_plankton.args.class_handler = new lib_plankton.args.class_handler(
			{
				"action": lib_plankton.args.class_argument.positional({
					"index": 0,
					"type": lib_plankton.args.enum_type.string,
					"mode": lib_plankton.args.enum_mode.replace,
					"default": "help",
					"info": "what to do : fetch | clear | build | deploy",
					"name": "action",
				}),
				"definition_path": lib_plankton.args.class_argument.volatile({
					"indicators_long": ["definition-path"],
					"indicators_short": ["d"],
					"type": lib_plankton.args.enum_type.string,
					"mode": lib_plankton.args.enum_mode.replace,
					"default": "ivaldi.json",
					"info": "path to definition file",
					"name": "definition-path",
				}),
				"assets": lib_plankton.args.class_argument.volatile({
					"indicators_long": ["asset"],
					"indicators_short": ["a"],
					"type": lib_plankton.args.enum_type.string,
					"mode": lib_plankton.args.enum_mode.accumulate,
					"default": [],
					"info": "<from>:<to>",
					"name": "assets",
				}),
				"targets": lib_plankton.args.class_argument.volatile({
					"indicators_long": ["target"],
					"indicators_short": ["t"],
					"type": lib_plankton.args.enum_type.string,
					"mode": lib_plankton.args.enum_mode.accumulate,
					"default": [],
					"info": "list of targets to build",
					"name": "targets",
				}),
				"temp_directory_pattern": lib_plankton.args.class_argument.volatile({
					"indicators_long": ["temp-directory"],
					"indicators_short": ["T"],
					"type": lib_plankton.args.enum_type.string,
					"mode": lib_plankton.args.enum_mode.replace,
					"default": "/tmp/{{project}}-temp",
					"info": "pattern for temp directory",
					"name": "temp-directory-pattern",
				}),
				"build_directory_pattern": lib_plankton.args.class_argument.volatile({
					"indicators_long": ["build-directory"],
					"indicators_short": ["B"],
					"type": lib_plankton.args.enum_type.string,
					"mode": lib_plankton.args.enum_mode.replace,
					"default": "/tmp/{{project}}",
					"info": "pattern for build directory",
					"name": "build-directory-pattern",
				}),
				"makefile_path_pattern": lib_plankton.args.class_argument.volatile({
					"indicators_long": ["makefile-path"],
					"indicators_short": ["M"],
					"type": lib_plankton.args.enum_type.string,
					"mode": lib_plankton.args.enum_mode.replace,
					"default": "/tmp/{{project}}-makefile",
					"info": "pattern for makefile path",
					"name": "makefile-path-pattern",
				}),
				"verbosity": lib_plankton.args.class_argument.volatile({
					"indicators_long": ["verbosity"],
					"indicators_short": ["v"],
					"type": lib_plankton.args.enum_type.string,
					"mode": lib_plankton.args.enum_mode.replace,
					"default": "notice",
					"info": "error | warning | notice | info | debug",
					"name": "verbosity",
				}),
				"help": lib_plankton.args.class_argument.volatile({
					"indicators_long": ["help"],
					"indicators_short": ["h"],
					"type": lib_plankton.args.enum_type.boolean,
					"mode": lib_plankton.args.enum_mode.replace,
					"default": false,
					"info": "alias for action 'help'",
					"name": "help",
				}),
			}
		);
		const args : Record<string, any> = arg_handler.read(
			lib_plankton.args.enum_environment.cli,
			args_raw.join(" ")
		);
		
		// init
		lib_plankton.log.set_main_logger(
			[
				{
					"kind": "filtered",
					"data": {
						"core": {
							"kind": "std",
							"data": {
								"target": "stdout",
								"format": {
									"kind": "human_readable",
									"data": {
									}
								}
							}
						},
						"predicate": [
							[
								{
									"item": {
										"kind": "level",
										"data": {
											"threshold": args.verbosity,
										}
									},
								}
							]
						],
					}
				},
			]
		);
		
		// exec
		if (args.help)
		{
			process.stdout.write(
				arg_handler.generate_help(
					{
						"programname": "ivaldi",
						"description": "a collection of tools for building and deploying a software project on basis of typescript and node",
						"executable": "ivaldi",
					}
				)
			);
		}
		else
		{
			const content : string = await lib_plankton.file.read(args.definition_path as string);
			const data_raw : any = lib_plankton.json.decode(content);
			const definition : _ivaldi.type_definition = refine_definition(data_raw);
			
			switch (args.action)
			{
				default:
				{
					return Promise.reject<void>((new Error("unhandled action: " + args.action)));
					break;
				}
				case "fetch":
				{
					await action_fetch(
						definition
					);
					break;
				}
				case "clear":
				{
					await action_clear(
						definition,
						args.temp_directory_pattern,
						args.build_directory_pattern
					);
					break;
				}
				case "build":
				{
					await action_build(
						definition,
						args.assets.map(
							(asset_raw : string) => {
								const parts : Array<string> = asset_raw.split(":", 2);
								return {"from": parts[0], "to": parts[1]};
							}
						),
						args.temp_directory_pattern,
						args.build_directory_pattern,
						args.makefile_path_pattern,
						((args.targets.length <= 0) ? null : args.targets),
						{
							"show_actions": ["debug"].includes(args.verbosity),
						}
					);
					break;
				}
				/*
				case "deploy":
				{
					await action_deploy(
						definition,
						args.build_directory_pattern,
						args.deploy_system,
						args.deploy_directory
					);
					break;
				}
				 */
			}
		}
	}
	
}

_ivaldi.main(process.argv.slice(2))
	.then(() => {})
	.catch((reason) => {process.stderr.write(String(reason) + "\n");})
;