#!/usr/bin/env node
const os = require('os');
const request = require('request-promise-native');
const fs = require('mz/fs');

let hostname = os.hostname();
let baseUrl = 'YOUR_BASE_URL';

(async () => {
	let jwt = await getJwt();
	console.log("JWT Fetched");
	console.log("Getting Schema");

	let response = await request.post(baseUrl + '/graphql', {
		headers: {
			'Content-Type': 'application/json',
			'YOUR_HEADER+NAME': jwt
		},
		body: JSON.stringify({
			query: `
			query IntrospectionQuery {
				__schema {
					queryType { name }
					mutationType { name }
					subscriptionType { name }
					types {
					...FullType
					}
					directives {
						name
						description
						locations
						args {
						...InputValue
						}
					}
				}
			}

			fragment FullType on __Type {
				kind
				name
				description
				fields(includeDeprecated: true) {
					name
					description
					args {
					...InputValue
					}
					type {
					...TypeRef
					}
					isDeprecated
					deprecationReason
				}
				inputFields {
				...InputValue
				}
				interfaces {
				...TypeRef
				}
				enumValues(includeDeprecated: true) {
					name
					description
					isDeprecated
					deprecationReason
				}
				possibleTypes {
				...TypeRef
				}
			}

			fragment InputValue on __InputValue {
				name
				description
				type { ...TypeRef }
				defaultValue
			}

			fragment TypeRef on __Type {
				kind
				name
				ofType {
					kind
					name
					ofType {
						kind
						name
						ofType {
							kind
							name
							ofType {
								kind
								name
								ofType {
									kind
									name
									ofType {
										kind
										name
										ofType {
											kind
											name
										}
									}
								}
							}
						}
					}
				}
			}`
		})
	});

	await fs.writeFile('graphql.schema.json', JSON.stringify(JSON.parse(response), null, "\t"));

	console.log("Schema Updated!");
})();



async function getJwt() {
	let username = 'YOUR_USERNAME';
	let password = 'YOUR_PASSWPRD';

	let response = await request.post(baseUrl + '/auth', {
		headers: {
			'Content-Type': 'application/json'
		},
		body: JSON.stringify({
			username: username,
			password: password
		})
	});

	return JSON.parse(response).authenticationToken;
}