'use strict';

exports.up = function(knex, Promise) {
	return knex.schema
		.createTable("users", (table) => {
			table.bigIncrements("id").primary();
			table.text("username").notNullable();
			table.text("hash").notNullable();
			table.text("email_address").notNullable();
			table.boolean("is_active").notNullable();
			table.timestamp("created_at").notNullable().defaultTo(knex.fn.now());
		})
		.createTable("storage_pools", (table) => {
			table.bigIncrements("id").primary();
			table.text("type").notNullable(); // lvm, folder
			table.text("name"); // for lvm VG name
			table.text("path"); // for folder base path
			table.boolean("is_local").notNullable(); // to prevent trying to attach a storage volume that lives on the wrong host
			table.timestamp("created_at").notNullable().defaultTo(knex.fn.now());
		})
		.createTable("instance_types", (table) => {
			table.bigIncrements("id").primary();
			table.text("name").notNullable();
			table.text("internal_comment");
			table.integer("default_memory").notNullable(); // in MB
			table.integer("default_disk_space").notNullable(); // in MB
			table.integer("default_traffic"); // in MB
			table.timestamp("created_at").notNullable().defaultTo(knex.fn.now());
		})
		.createTable("allowed_storage_pools", (table) => {
			table.bigInteger("instance_type_id").notNullable().references("instance_types.id");
			table.bigInteger("storage_pool_id").notNullable().references("storage_pools.id");
			table.unique([ "instance_type_id", "storage_pool_id" ]);
		})
		.createTable("images", (table) => {
			table.bigIncrements("id").primary();
			table.bigInteger("user_id").notNullable().references("users.id"); // user that added it
			// table.uuid("file_id").notNullable();
			table.text("name");
			table.text("description");
			table.text("source_type").notNullable(); // local, http, upload
			table.text("source"); // URL, path, etc.
			table.boolean("is_public").notNullable(); // whether the image should be visible to everybody, or just its owner
			table.boolean("is_install_medium").notNullable(); // whether the image is just for installation (if not, it will be directly clonable)
			table.timestamp("created_at").notNullable().defaultTo(knex.fn.now());
		})
		.createTable("instances", (table) => {
			table.bigIncrements("id").primary();
			table.bigInteger("user_id").notNullable().references("users.id");
			table.bigInteger("mounted_image_id").references("images.id");
			table.bigInteger("last_installation_media_id").references("images.id");
			table.jsonb("boot_order").notNullable(); // array that includes references to storage volumes!
			// table.uuid("instance_uuid").notNullable();
			table.text("name");
			table.text("comment");
			table.integer("memory").notNullable(); // in MB
			table.integer("disk_space").notNullable(); // in MB
			table.integer("traffic"); // in MB
			table.boolean("is_suspended").notNullable();
			table.text("suspension_reason");
			table.boolean("is_terminated").notNullable();
			table.text("termination_reason");
			table.boolean("is_running");
			table.timestamp("created_at").notNullable().defaultTo(knex.fn.now());
		})
		.createTable("storage_volumes", (table) => {
			table.bigIncrements("id").primary();
			table.bigInteger("user_id").references("users.id");
			table.bigInteger("storage_pool_id").references("storage_pools.id");
			// table.uuid("volume_uuid").notNullable();
			table.text("format").notNullable(); // qcow2
			table.timestamp("created_at").notNullable().defaultTo(knex.fn.now());
		})
		.createTable("storage_attachments", (table) => {
			table.bigInteger("storage_volume_id").notNullable().references("storage_volumes.id").unique();
			table.bigInteger("instance_id").notNullable().references("storage_volumes.id");
			table.boolean("is_locked").notNullable(); // whether the user should be prevented from detaching this storage volume
		});
};

exports.down = function(knex, Promise) {
	return knex.schema
		.dropTable("storage_attachments")
		.dropTable("storage_volumes")
		.dropTable("instances")
		.dropTable("images")
		.dropTable("allowed_storage_pools")
		.dropTable("instance_types")
		.dropTable("storage_pools")
		.dropTable("users");
};