"use strict";

const Promise = require("bluebird");
const dlayer = require(".");
const syncpipe = require("syncpipe");

let fakeDriveTree = {
	one: [ "/dev/1a", "/dev/1b" ],
	two: [ "/dev/2a" ]
};

let invertedTree = {
	"/dev/1a": "one",
	"/dev/1b": "one",
	"/dev/2a": "two"
};

let contextCounter = 1;

// FIXME: Disallow type name conflicts!

let moduleDrives = {
	name: "Drives",
	types: {
		"sysquery.core.Drive": function ({ name }) {
			return {
				name: name
			};
		}
	},
	extensions: {
		"sysquery.core.BlockDevice": {
			drive: async function (_, { counter, $getProperty, $make }) {
				console.log(`[context ${counter}] BlockDevice::drive`);

				return $make("sysquery.core.Drive", {
					name: invertedTree[await $getProperty(this, "path")]
				});
			}
		}
	},
	root: {
		hardware: {
			drives: function ({ names }, { counter, $make }) {
				console.log(`[context ${counter}] root::drives`);

				return syncpipe(fakeDriveTree, [
					_ => Object.entries(_),
					_ => (names != null)
						? _.filter(([ name, _devices ]) => names.includes(name))
						: _,
					_ => _.map(([ name, _devices ]) => $make("sysquery.core.Drive", { name }))
				]);
			}
		}
	},
	makeContext: () => {
		return {
			counter: contextCounter++
		};
	}
};

let moduleBlockDevices = {
	name: "Block Devices",
	types: {
		"sysquery.core.BlockDevice": function ({ path }) {
			return {
				path: path
			};
		}
	},
	extensions: {
		"sysquery.core.Drive": {
			blockDevices: async function (_, { counter, $getProperty, $make }) {
				console.log(`[context ${counter}] Drive::blockDevices`);

				return fakeDriveTree[await $getProperty(this, "name")].map((path) => {
					return $make("sysquery.core.BlockDevice", { path });
				});
			}
		}
	},
	root: {
		hardware: {
			blockDevices: function ({ paths }, { counter, $make }) {
				console.log(`[context ${counter}] root::blockDevices`);

				return syncpipe(fakeDriveTree, [
					_ => Object.values(_),
					_ => _.flat(),
					_ => (paths != null)
						? _.filter((path) => paths.includes(path))
						: _,
					_ => _.map((path) => $make("sysquery.core.BlockDevice", { path }))
				]);
			}
		}
	},
	makeContext: () => {
		return {
			counter: contextCounter++
		};
	}
};

let api = dlayer({
	schema: {
		foo: {
			bar: "baz"
		}
	},
	modules: [ moduleBlockDevices, moduleDrives ]
});

return Promise.try(() => {
	return api.query({
		hardware: {
			blockDevices: {
				$arguments: { paths: [ "/dev/1b" ] },
				path: true,
				drive: {
					name: true,
					blockDevices: {
						path: true
					}
				}
			}
		}
	});
}).then((result) => {
	console.log("-- result:");
	console.dir(result, {depth: null});
}).catch((error) => {
	console.log("Unhandled error:");
	console.dir(error);
});