const assert = require('assert')
const {
	unlinkSync
} = require('fs')
const memento = require('../').default

const filename = 'test.yaml'
const deleteFile = () => {
	try {
		// Remove the test file
		unlinkSync(filename)
	} catch (e) {}
}

describe('Memento', () => {

	after(deleteFile)

	describe('Basics', () => {
		deleteFile()
		it('Instantiating without existing file', () => {
			const Settings = new memento(filename)
		})

		it('Saving simple string', () => {
			const Settings = new memento(filename)

			const key = 'test'
			const value = 'ok'
			Settings.set(key, value)

			assert.strictEqual(Settings.get(key), value)
		})
	})

	describe('Preserve types', () => {
		const Settings = new memento(filename)
		const key = 'key'

		const test = (value) => {
			Settings.set(key, value)
			const saved = Settings.get(key)
			assert.strictEqual(saved, value)
		}

		it('string', () => {
			test('my string')
		})

		it('string array', () => {
			test(['my string', 'ohlala'])
		})

		it('number', () => {
			test(42)
		})

		it('number array', () => {
			test([42, 8])
		})

		it('boolean', () => {
			test(true)
		})

		it('boolean array', () => {
			test([true, false])
		})

		it('mixed', () => {
			test(['a', 42, true])
		})

	})

	describe('Persist', () => {
		deleteFile()

		const key = 'test'
		const value = 42

		it('Write', () => {
			const Settings = new memento(filename)
			Settings.set(key, value)
		})

		it('Read', () => {
			const Settings = new memento(filename)
			assert.strictEqual(Settings.get(key), value)
		})
	})

	describe('Nested properties', () => {
		deleteFile()

		const data = {
			a: {
				b: {
					c: [8, false]
				}
			}
		}

		it('Write', () => {
			const Settings = new memento(filename)
			Settings.set('a.b.c', data.a.b.c)
		})

		it('Read', () => {
			const Settings = new memento(filename)
			assert.deepStrictEqual(Settings.get('a'), data.a)
			assert.deepStrictEqual(Settings.get('a.b'), data.a.b)
			assert.deepStrictEqual(Settings.get('a.b.c'), data.a.b.c)
		})
	})

	describe('Get with initializer', ()=> {
		deleteFile()

		const key = 'initialized'
		const value = true

		it('Getting', () => {
			const Settings = new memento(filename)
			assert.strictEqual(Settings.get(key, value), value)
		})

		it('Verify it was written', () => {
			const Settings = new memento(filename)
			assert.strictEqual(Settings.get(key), value)
		})
	})

})