const optionsSchema = require("./optionsSchema.json");

const nestedProperties = ["anyOf", "oneOf", "allOf"];

const resolveSchema = schema => {
	let current = schema;
	if (schema && typeof schema === "object" && "$ref" in schema) {
		const path = schema.$ref.split("/");
		for (const element of path) {
			if (element === "#") {
				current = optionsSchema;
			} else {
				current = current[element];
			}
		}
	}
	return current;
};

const findPropertyInSchema = (schema, property, subProperty) => {
	if (!schema) return null;
	if (subProperty) {
		if (schema[property] && typeof schema[property] === "object" && subProperty in schema[property]) {
			return resolveSchema(schema[property][subProperty]);
		}
	} else {
		if (property in schema) return resolveSchema(schema[property]);
	}
	for (const name of nestedProperties) {
		if (schema[name]) {
			for (const item of schema[name]) {
				const resolvedItem = resolveSchema(item);
				const result = findPropertyInSchema(resolvedItem, property, subProperty);
				if (result) return result;
			}
		}
	}
	return undefined;
};

const getSchemaInfo = (path, property, subProperty) => {
	const pathSegments = path.split(".");
	let current = optionsSchema;
	for (const segment of pathSegments) {
		if (segment === "*") {
			current = findPropertyInSchema(current, "additionalProperties") || findPropertyInSchema(current, "items");
		} else {
			current = findPropertyInSchema(current, "properties", segment);
		}
		if (!current) return undefined;
	}
	return findPropertyInSchema(current, property, subProperty);
};

const CONFIG_GROUP = "Config options:";
const BASIC_GROUP = "Basic options:";
const MODULE_GROUP = "Module options:";
const OUTPUT_GROUP = "Output options:";
const ADVANCED_GROUP = "Advanced options:";
const RESOLVE_GROUP = "Resolving options:";
const OPTIMIZE_GROUP = "Optimizing options:";

module.exports = function(yargs) {
	yargs
		.help("help")
		.alias("help", "h")
		.version()
		.alias("version", "v")
		.options({
			config: {
				type: "string",
				describe: "Path to the config file",
				group: CONFIG_GROUP,
				defaultDescription: "webpack.config.js or webpackfile.js",
				requiresArg: true
			},
			"config-register": {
				type: "array",
				alias: "r",
				describe: "Preload one or more modules before loading the webpack configuration",
				group: CONFIG_GROUP,
				defaultDescription: "module id or path",
				requiresArg: true
			},
			"config-name": {
				type: "string",
				describe: "Name of the config to use",
				group: CONFIG_GROUP,
				requiresArg: true
			},
			env: {
				describe: "Environment passed to the config, when it is a function",
				group: CONFIG_GROUP
			},
			mode: {
				type: getSchemaInfo("mode", "type"),
				choices: getSchemaInfo("mode", "enum"),
				describe: getSchemaInfo("mode", "description"),
				group: CONFIG_GROUP,
				requiresArg: true
			},
			context: {
				type: getSchemaInfo("context", "type"),
				describe: getSchemaInfo("context", "description"),
				group: BASIC_GROUP,
				defaultDescription: "The current directory",
				requiresArg: true
			},
			entry: {
				type: "string",
				describe: getSchemaInfo("entry", "description"),
				group: BASIC_GROUP,
				requiresArg: true
			},
			"module-bind": {
				type: "string",
				describe: "Bind an extension to a loader",
				group: MODULE_GROUP,
				requiresArg: true
			},
			"module-bind-post": {
				type: "string",
				describe: "Bind an extension to a post loader",
				group: MODULE_GROUP,
				requiresArg: true
			},
			"module-bind-pre": {
				type: "string",
				describe: "Bind an extension to a pre loader",
				group: MODULE_GROUP,
				requiresArg: true
			},
			output: {
				alias: "o",
				describe: "The output path and file for compilation assets",
				group: OUTPUT_GROUP,
				requiresArg: true
			},
			"output-path": {
				type: "string",
				describe: getSchemaInfo("output.path", "description"),
				group: OUTPUT_GROUP,
				defaultDescription: "The current directory",
				requiresArg: true
			},
			"output-filename": {
				type: "string",
				describe: getSchemaInfo("output.filename", "description"),
				group: OUTPUT_GROUP,
				defaultDescription: "[name].js",
				requiresArg: true
			},
			"output-chunk-filename": {
				type: "string",
				describe: getSchemaInfo("output.chunkFilename", "description"),
				group: OUTPUT_GROUP,
				defaultDescription: "filename with [id] instead of [name] or [id] prefixed",
				requiresArg: true
			},
			"output-source-map-filename": {
				type: "string",
				describe: getSchemaInfo("output.sourceMapFilename", "description"),
				group: OUTPUT_GROUP,
				requiresArg: true
			},
			"output-public-path": {
				type: "string",
				describe: getSchemaInfo("output.publicPath", "description"),
				group: OUTPUT_GROUP,
				requiresArg: true
			},
			"output-jsonp-function": {
				type: "string",
				describe: getSchemaInfo("output.jsonpFunction", "description"),
				group: OUTPUT_GROUP,
				requiresArg: true
			},
			"output-pathinfo": {
				type: "boolean",
				describe: getSchemaInfo("output.pathinfo", "description"),
				group: OUTPUT_GROUP
			},
			"output-library": {
				type: "array",
				describe: "Expose the exports of the entry point as library",
				group: OUTPUT_GROUP,
				requiresArg: true
			},
			"output-library-target": {
				type: "string",
				describe: getSchemaInfo("output.libraryTarget", "description"),
				choices: getSchemaInfo("output.libraryTarget", "enum"),
				group: OUTPUT_GROUP,
				requiresArg: true
			},
			"records-input-path": {
				type: "string",
				describe: getSchemaInfo("recordsInputPath", "description"),
				group: ADVANCED_GROUP,
				requiresArg: true
			},
			"records-output-path": {
				type: "string",
				describe: getSchemaInfo("recordsOutputPath", "description"),
				group: ADVANCED_GROUP,
				requiresArg: true
			},
			"records-path": {
				type: "string",
				describe: getSchemaInfo("recordsPath", "description"),
				group: ADVANCED_GROUP,
				requiresArg: true
			},
			define: {
				type: "string",
				describe: "Define any free var in the bundle",
				group: ADVANCED_GROUP,
				requiresArg: true
			},
			target: {
				type: "string",
				describe: getSchemaInfo("target", "description"),
				group: ADVANCED_GROUP,
				requiresArg: true
			},
			cache: {
				type: "boolean",
				describe: getSchemaInfo("cache", "description"),
				default: null,
				group: ADVANCED_GROUP,
				defaultDescription: "It's enabled by default when watching"
			},
			watch: {
				type: "boolean",
				alias: "w",
				describe: getSchemaInfo("watch", "description"),
				group: BASIC_GROUP
			},
			"watch-stdin": {
				type: "boolean",
				alias: "stdin",
				describe: getSchemaInfo("watchOptions.stdin", "description"),
				group: ADVANCED_GROUP
			},
			"watch-aggregate-timeout": {
				describe: getSchemaInfo("watchOptions.aggregateTimeout", "description"),
				type: getSchemaInfo("watchOptions.aggregateTimeout", "type"),
				group: ADVANCED_GROUP,
				requiresArg: true
			},
			"watch-poll": {
				type: "string",
				describe: getSchemaInfo("watchOptions.poll", "description"),
				group: ADVANCED_GROUP
			},
			hot: {
				type: "boolean",
				describe: "Enables Hot Module Replacement",
				group: ADVANCED_GROUP
			},
			debug: {
				type: "boolean",
				describe: "Switch loaders to debug mode",
				group: BASIC_GROUP
			},
			devtool: {
				type: "string",
				describe: getSchemaInfo("devtool", "description"),
				group: BASIC_GROUP,
				requiresArg: true
			},
			"resolve-alias": {
				type: "string",
				describe: getSchemaInfo("resolve.alias", "description"),
				group: RESOLVE_GROUP,
				requiresArg: true
			},
			"resolve-extensions": {
				type: "array",
				describe: getSchemaInfo("resolve.alias", "description"),
				group: RESOLVE_GROUP,
				requiresArg: true
			},
			"resolve-loader-alias": {
				type: "string",
				describe: "Setup a loader alias for resolving",
				group: RESOLVE_GROUP,
				requiresArg: true
			},
			"optimize-max-chunks": {
				describe: "Try to keep the chunk count below a limit",
				group: OPTIMIZE_GROUP,
				requiresArg: true
			},
			"optimize-min-chunk-size": {
				describe: getSchemaInfo("optimization.splitChunks.minSize", "description"),
				group: OPTIMIZE_GROUP,
				requiresArg: true
			},
			"optimize-minimize": {
				type: "boolean",
				describe: getSchemaInfo("optimization.minimize", "description"),
				group: OPTIMIZE_GROUP
			},
			prefetch: {
				type: "string",
				describe: "Prefetch this request (Example: --prefetch ./file.js)",
				group: ADVANCED_GROUP,
				requiresArg: true
			},
			provide: {
				type: "string",
				describe: "Provide these modules as free vars in all modules (Example: --provide jQuery=jquery)",
				group: ADVANCED_GROUP,
				requiresArg: true
			},
			"labeled-modules": {
				type: "boolean",
				describe: "Enables labeled modules",
				group: ADVANCED_GROUP
			},
			plugin: {
				type: "string",
				describe: "Load this plugin",
				group: ADVANCED_GROUP,
				requiresArg: true
			},
			bail: {
				type: getSchemaInfo("bail", "type"),
				describe: getSchemaInfo("bail", "description"),
				group: ADVANCED_GROUP,
				default: null
			},
			profile: {
				type: "boolean",
				describe: getSchemaInfo("profile", "description"),
				group: ADVANCED_GROUP,
				default: null
			},
			d: {
				type: "boolean",
				describe: "shortcut for --debug --devtool eval-cheap-module-source-map --output-pathinfo",
				group: BASIC_GROUP
			},
			p: {
				type: "boolean",
				describe: "shortcut for --optimize-minimize --define process.env.NODE_ENV=\"production\"",
				group: BASIC_GROUP
			}
		});
};