const _conf_schema : lib_plankton.conf.type_schema = {
	"nullable": false,
	"type": "object",
	"properties": {
		"version": {
			"nullable": false,
			"type": "string"
		},
		"target": {
			"anyOf": [
				{
					"nullable": false,
					"type": "object",
					"properties": {
						"kind": {
							"nullable": false,
							"type": "string",
							"enum": ["plain"]
						},
						"parameters": {
							"nullable": false,
							"type": "object",
							"properties": {
								"directory": {
									"nullable": false,
									"type": "string"
								},
							},
							"additionalProperties": false,
							"required": [
								"directory",
							]
						},
					},
					"additionalProperties": false,
					"required": [
						"kind",
						"parameters",
					]
				},
				{
					"nullable": false,
					"type": "object",
					"properties": {
						"kind": {
							"nullable": false,
							"type": "string",
							"enum": ["borg"]
						},
						"parameters": {
							"nullable": false,
							"type": "object",
							"properties": {
								"repository": {
									"nullable": false,
									"type": "string"
								},
								"compression": {
									"nullable": false,
									"type": "string",
									"enum": [
										"none",
										"lz4",
										"zlib",
										"lzma",
									],
									"default": "lz4"
								},
							},
							"required": [
								"repository",
							]
						},
					},
					"additionalProperties": false,
					"required": [
						"kind",
						"parameters",
					]
				}
			]
		},
		/*
		"defaults": {
		},
		 */
		"concerns": {
			"nullable": false,
			"type": "array",
			"items": {
				"anyOf": [
					{
						"nullable": false,
						"type": "object",
						"properties": {
							"active": {
								"nullable": false,
								"type": "boolean",
								"default": true
							},
							"name": {
								"nullable": false,
								"type": "string"
							},
							"kind": {
								"nullable": false,
								"type": "string",
								"enum": ["files"]
							},
							"parameters": {
								"nullable": false,
								"type": "object",
								"properties": {
									"path": {
										"nullable": false,
										"type": "string",
									},
									"name": {
										"nullable": false,
										"type": "string",
									},
								},
								"additionalProperties": false,
								"required": [
									"path",
									"name",
								]
							}
						},
						"additionalProperties": false,
						"required": [
							"name",
							"kind",
							"parameters",
						]
					},
					{
						"nullable": false,
						"type": "object",
						"properties": {
							"active": {
								"nullable": false,
								"type": "boolean",
								"default": true
							},
							"name": {
								"nullable": false,
								"type": "string"
							},
							"kind": {
								"nullable": false,
								"type": "string",
								"enum": ["postgresql_dump"]
							},
							"parameters": {
								"nullable": false,
								"type": "object",
								"properties": {
									"credentials": {
										"nullable": false,
										"type": "object",
										"properties": {
											"host": {
												"nullable": false,
												"type": "string",
											},
											"port": {
												"nullable": false,
												"type": "integer",
												"default": 5432
											},
											"username": {
												"nullable": false,
												"type": "string",
											},
											"password": {
												"nullable": false,
												"type": "string",
											},
											"schema": {
												"nullable": false,
												"type": "string",
											},
										},
										"additionalProperties": false,
										"required": [
											"host",
											"username",
											"password",
											"schema",
										]
									},
									"name": {
										"nullable": false,
										"type": "string",
									},
								},
								"additionalProperties": false,
								"required": [
									"credentials",
									"name",
								]
							}
						},
						"additionalProperties": false,
						"required": [
							"name",
							"kind",
							"parameters",
						]
					},
				]
			}
		},
	},
	"additionalProperties": false,
	"required": [
		"version",
		"target",
		"concerns",
	]
};


/**
 */
function get_stamp(): string
{
	let date: Date = (new Date(Date.now()));
	return lib_plankton.string.coin(
		// "{{year}}{{month}}{{day}}T{{hour}}{{minute}}{{second}}",
		"{{year}}-{{month}}-{{day}}",
		{
			"year": date.getFullYear().toFixed(0).padStart(4, "0"),
			"month": (date.getMonth() + 1).toFixed(0).padStart(2, "0"),
			"day": date.getDate().toFixed(0).padStart(2, "0"),
			"hour": date.getHours().toFixed(0).padStart(2, "0"),
			"minute": date.getMinutes().toFixed(0).padStart(2, "0"),
			"second": date.getSeconds().toFixed(0).padStart(2, "0"),
		}
	);
}


/**
 */
async function main(): Promise<void>
{
	// const conf = lib_plankton.json.decode(await lib_plankton.file.read("conf.json"));
	const conf : any = await lib_plankton.conf.load(
		_conf_schema,
		"conf.json"
	);
	const stamp: string = get_stamp();
	
	switch (conf.target.kind) {
		case "plain": {
			const target_directory = (conf.target.parameters.directory/* + "/" + stamp*/);
			
			let commands: Array<string> = [];
			const commands_add : (command: string) => void = (command) => {
				commands.push(command);
			};
			const commands_apply : () => void = () => {
				// TODO
				process.stdout.write(commands.join("\n") + "\n");
			};
			
			commands_add(
				lib_plankton.string.coin(
					"mkdir --parents {{directory}}",
					{
						"directory": target_directory,
					}
				)
			);
			commands_add(
				""
			);
			for await (const concern of conf.concerns) {
				if (! concern.active) {
					// do nothing
				}
				else {
					commands_add(
						lib_plankton.string.coin(
							"# {{name}}",
							{
								"name": concern.name,
								"kind": concern.kind,
							}
						)
					);
					commands_add(
						lib_plankton.string.coin(
							"echo '-- {{name}}' > /dev/stderr",
							{
								"name": concern.name,
								"kind": concern.kind,
							}
						)
					);
					switch (concern.kind) {
						case "files": {
							commands_add(
								lib_plankton.string.coin(
									"mkdir --parents {{directory}}",
									{
										"directory": lib_plankton.string.coin(
											"{{directory}}/{{name}}",
											{
												"directory": target_directory,
												"name": concern.parameters.name,
											}
										),
									}
								)
							);
							commands_add(
								lib_plankton.string.coin(
									"tar --create --directory={{path}} . > {{target_path}}",
									{
										"path": concern.parameters.path,
										"target_path": lib_plankton.string.coin(
											"{{directory}}/{{name}}/data.tar",
											{
												"directory": target_directory,
												"name": concern.parameters.name,
											}
										),
									}
								)
							);
							break;
						}
						case "postgresql_dump": {
							const password_file_path: string = "${HOME}/.pgpass";
							commands_add(
								lib_plankton.string.coin(
									"echo '{{host}}:{{port}}:{{schema}}:{{username}}:{{password}}' > {{path}} && chmod 0600 {{path}}",
									{
										"path": password_file_path,
										"host": concern.parameters.credentials.host,
										"port": concern.parameters.credentials.port.toFixed(0),
										"username": concern.parameters.credentials.username,
										"password": concern.parameters.credentials.password,
										"schema": concern.parameters.credentials.schema,
									}
								)
							);
							commands_add(
								lib_plankton.string.coin(
									"mkdir --parents {{directory}}",
									{
										"directory": lib_plankton.string.coin(
											"{{directory}}/{{name}}",
											{
												"directory": target_directory,
												"name": concern.parameters.name,
											}
										),
									}
								)
							);
							commands_add(
								lib_plankton.string.coin(
									"pg_dump --host={{host}} --port={{port}} --username={{username}} {{schema}} > {{target_path}}",
									{
										"host": concern.parameters.credentials.host,
										"port": concern.parameters.credentials.port.toFixed(0),
										"username": concern.parameters.credentials.username,
										"schema": concern.parameters.credentials.schema,
										"target_path": lib_plankton.string.coin(
											"{{directory}}/{{name}}/data.sql",
											{
												"directory": target_directory,
												"name": concern.parameters.name,
											}
										),
									}
								)
							);
							commands_add(
								lib_plankton.string.coin(
									"rm {{path}}",
									{
										"path": password_file_path,
									}
								)
							);
							break;
						}
						default: {
							throw (new Error("unhandled kind: " + concern.kind));
							break;
						}
					}
					commands_add(
						""
					);
				}
			}
			commands_add(
				lib_plankton.string.coin(
					"echo '{{directory}}'",
					{
						"directory": target_directory,
					}
				)
			);
			commands_apply();
			break;
		}
		default: {
			throw (new Error("unhandled target kind: " + conf.target.kind));
			break;
		}
	}
	
	return Promise.resolve<void>(undefined);
}

main();