"use strict";

module.exports = {
	migration: {
		createCollection: [ operationCreateCollection, {
			createField: operationCreateField,
			createIndex: operationCreateIndex
		}],
		modifyCollection: {
			createField: operationCreateField,
			modifyField: operationModifyField,
			deleteField: operationDeleteField,
			createIndex: operationCreateIndex,
			deleteIndex: operationDeleteIndex
		},
		deleteCollection: operationDeleteCollection
	}
};

function operationCreateCollection(item) {
	return {
		type: "createCollection",
		name: item.name
	};
}

function operationDeleteCollection(item) {
	return {
		type: "deleteCollection",
		name: item.name
	};

	// TODO: Actually make it delete the data? Maybe have an option in dev to retain 'deleted' collections? Need to figure out security/privacy implications of that, and whether it's even useful to begin with
}

function operationCreateField(item, path) {
	return {
		type: "createField",
		collection: path.at(-1).name,
		name: item.name,
		operations: item.operations
	};
}

function operationModifyField(item, path) {
	return {
		type: "modifyField",
		collection: path.at(-1).name,
		name: item.name,
		operations: item.operations
	};
}

function operationDeleteField(item, path) {
	return {
		type: "deleteField",
		collection: path.at(-1).name,
		name: item.name
	};
}

function operationCreateIndex(_item, _path) {
	throw new Error(`Not implemented yet`);
}

function operationDeleteIndex(_item, _path) {
	throw new Error(`Not implemented yet`);
}