<template>
	<div>
		<page-metadata
			:title="mode === 'reset' ? 'Reset password' : 'Set password'"
		/>
		<main-header />
		<div class="container">
			<div class="content-wrapper">
				<h1 id="title" class="has-text-centered page-title">
					{{ mode === "reset" ? "Reset" : "Set" }} your password
				</h1>

				<div id="steps">
					<p class="step" :class="{ selected: step === 1 }">1</p>
					<span class="divider"></span>
					<p class="step" :class="{ selected: step === 2 }">2</p>
					<span class="divider"></span>
					<p class="step" :class="{ selected: step === 3 }">3</p>
				</div>

				<div class="content-box-wrapper">
					<transition-group name="steps-fade" mode="out-in">
						<div class="content-box">
							<!-- Step 1 -- Enter email address -->
							<div v-if="step === 1" key="1">
								<h2 class="content-box-title">
									Enter your email address
								</h2>
								<p class="content-box-description">
									We will send a code to your email address to
									verify your identity.
								</p>

								<p class="content-box-optional-helper">
									<a @click="step = 2"
										>Already have a code?</a
									>
								</p>

								<div class="content-box-inputs">
									<div
										class="control is-grouped input-with-button"
									>
										<p class="control is-expanded">
											<input
												class="input"
												type="email"
												placeholder="Enter email address here..."
												autofocus
												v-model="email.value"
												@keyup.enter="submitEmail()"
												@keypress="onInput('email')"
												@paste="onInput('email')"
											/>
										</p>
										<p class="control">
											<button
												class="button is-info"
												@click="submitEmail()"
											>
												<i
													class="material-icons icon-with-button"
													>mail</i
												>Request
											</button>
										</p>
									</div>
									<transition name="fadein-helpbox">
										<input-help-box
											:entered="email.entered"
											:valid="email.valid"
											:message="email.message"
										/>
									</transition>
								</div>
							</div>

							<!-- Step 2 -- Enter code -->
							<div v-if="step === 2" key="2">
								<h2 class="content-box-title">
									Enter the code sent to your email
								</h2>
								<p
									class="content-box-description"
									v-if="!email.hasBeenSentAlready"
								>
									A code has been sent to
									<strong>{{ email.value }}.</strong>
								</p>

								<p class="content-box-optional-helper">
									<a
										@click="
											email.value
												? submitEmail()
												: (step = 1)
										"
										>Request another code</a
									>
								</p>

								<div class="content-box-inputs">
									<div
										class="control is-grouped input-with-button"
									>
										<p class="control is-expanded">
											<input
												class="input"
												type="text"
												placeholder="Enter code here..."
												autofocus
												v-model="code"
												@keyup.enter="verifyCode()"
											/>
										</p>
										<p class="control">
											<button
												class="button is-info"
												@click="verifyCode()"
											>
												<i
													class="material-icons icon-with-button"
													>vpn_key</i
												>Verify
											</button>
										</p>
									</div>
								</div>
							</div>

							<!-- Step 3 -- Set new password -->
							<div v-if="step === 3" key="3">
								<h2 class="content-box-title">
									Set a new password
								</h2>
								<p class="content-box-description">
									Create a new password for your account.
								</p>

								<div class="content-box-inputs">
									<p class="control is-expanded">
										<label for="new-password"
											>New password</label
										>
									</p>

									<div id="password-visibility-container">
										<input
											class="input"
											id="new-password"
											type="password"
											ref="password"
											placeholder="Enter password here..."
											v-model="password.value"
											@keypress="onInput('password')"
											@paste="onInput('password')"
										/>
										<a
											@click="
												togglePasswordVisibility(
													'password'
												)
											"
										>
											<i class="material-icons">
												{{
													!password.visible
														? "visibility"
														: "visibility_off"
												}}
											</i>
										</a>
									</div>

									<transition name="fadein-helpbox">
										<input-help-box
											:entered="password.entered"
											:valid="password.valid"
											:message="password.message"
										/>
									</transition>

									<p
										id="new-password-again-input"
										class="control is-expanded"
									>
										<label for="new-password-again"
											>New password again</label
										>
									</p>

									<div id="password-visibility-container">
										<input
											class="input"
											id="new-password-again"
											type="password"
											ref="passwordAgain"
											placeholder="Enter password here..."
											v-model="passwordAgain.value"
											@keyup.enter="changePassword()"
											@keypress="onInput('passwordAgain')"
											@paste="onInput('passwordAgain')"
										/>
										<a
											@click="
												togglePasswordVisibility(
													'passwordAgain'
												)
											"
										>
											<i class="material-icons">
												{{
													!passwordAgain.visible
														? "visibility"
														: "visibility_off"
												}}
											</i>
										</a>
									</div>

									<transition name="fadein-helpbox">
										<input-help-box
											:entered="passwordAgain.entered"
											:valid="passwordAgain.valid"
											:message="passwordAgain.message"
										/>
									</transition>

									<button
										id="change-password-button"
										class="button is-success"
										@click="changePassword()"
									>
										Change password
									</button>
								</div>
							</div>

							<div
								class="reset-status-box"
								v-if="step === 4"
								key="4"
							>
								<i class="material-icons success-icon"
									>check_circle</i
								>
								<h2>Password successfully {{ mode }}</h2>
								<router-link
									class="button is-dark"
									to="/settings"
									><i class="material-icons icon-with-button"
										>undo</i
									>Return to Settings</router-link
								>
							</div>

							<div
								class="reset-status-box"
								v-if="step === 5"
								key="5"
							>
								<i class="material-icons error-icon">error</i>
								<h2>
									Password {{ mode }} failed, please try again
									later
								</h2>
								<router-link
									class="button is-dark"
									to="/settings"
									><i class="material-icons icon-with-button"
										>undo</i
									>Return to Settings</router-link
								>
							</div>
						</div>
					</transition-group>
				</div>
			</div>
		</div>
		<main-footer />
	</div>
</template>

<script>
import Toast from "toasters";
import { mapGetters, mapState } from "vuex";

import MainHeader from "@/components/layout/MainHeader.vue";
import MainFooter from "@/components/layout/MainFooter.vue";
import InputHelpBox from "@/components/InputHelpBox.vue";

import validation from "@/validation";

export default {
	components: { MainHeader, MainFooter, InputHelpBox },
	props: {
		mode: {
			default: "reset",
			enum: ["reset", "set"],
			type: String
		}
	},
	data() {
		return {
			code: "",
			email: {
				value: "",
				hasBeenSentAlready: true,
				entered: false,
				valid: false,
				message: "Please enter a valid email address."
			},
			password: {
				value: "",
				visible: false,
				entered: false,
				valid: false,
				message:
					"Include at least one lowercase letter, one uppercase letter, one number and one special character."
			},
			passwordAgain: {
				value: "",
				visible: false,
				entered: false,
				valid: false,
				message: "This password must match."
			},
			step: 1
		};
	},
	computed: {
		...mapGetters({
			socket: "websockets/getSocket"
		}),
		...mapState({
			accountEmail: state => state.user.auth.email
		})
	},
	watch: {
		"email.value": function watchEmail(value) {
			if (!value) return;

			if (
				value.indexOf("@") !== value.lastIndexOf("@") ||
				!validation.regex.emailSimple.test(value)
			) {
				this.email.message = "Please enter a valid email address.";
				this.email.valid = false;
			} else {
				this.email.message = "Everything looks great!";
				this.email.valid = true;
			}
		},
		"password.value": function watchPassword(value) {
			if (!value) return;

			this.checkPasswordMatch(value, this.passwordAgain.value);

			if (!validation.isLength(value, 6, 200)) {
				this.password.message =
					"Password must have between 6 and 200 characters.";
				this.password.valid = false;
			} else if (!validation.regex.password.test(value)) {
				this.password.message =
					"Include at least one lowercase letter, one uppercase letter, one number and one special character.";
				this.password.valid = false;
			} else {
				this.password.message = "Everything looks great!";
				this.password.valid = true;
			}
		},
		"passwordAgain.value": function watchPasswordAgain(value) {
			if (!value) return;

			this.checkPasswordMatch(this.password.value, value);
		}
	},
	mounted() {
		this.email.value = this.accountEmail;
	},
	methods: {
		togglePasswordVisibility(ref) {
			if (this.$refs[ref].type === "password") {
				this.$refs[ref].type = "text";
				this[ref].visible = true;
			} else {
				this.$refs[ref].type = "password";
				this[ref].visible = false;
			}
		},
		checkPasswordMatch(password, passwordAgain) {
			if (passwordAgain !== password) {
				this.passwordAgain.message = "This password must match.";
				this.passwordAgain.valid = false;
			} else {
				this.passwordAgain.message = "Everything looks great!";
				this.passwordAgain.valid = true;
			}
		},
		onInput(inputName) {
			this[inputName].entered = true;
		},
		submitEmail() {
			if (
				this.email.value.indexOf("@") !==
					this.email.value.lastIndexOf("@") ||
				!validation.regex.emailSimple.test(this.email.value)
			)
				return new Toast("Invalid email format.");

			if (!this.email.value) return new Toast("Email cannot be empty");

			this.email.hasBeenSentAlready = false;

			if (this.mode === "set") {
				return this.socket.dispatch("users.requestPassword", res => {
					new Toast(res.message);
					if (res.status === "success") this.step = 2;
				});
			}

			return this.socket.dispatch(
				"users.requestPasswordReset",
				this.email.value,
				res => {
					new Toast(res.message);
					if (res.status === "success") {
						this.code = ""; // in case: already have a code -> request another code
						this.step = 2;
					} else this.step = 5;
				}
			);
		},
		verifyCode() {
			if (!this.code) return new Toast("Code cannot be empty");

			return this.socket.dispatch(
				this.mode === "set"
					? "users.verifyPasswordCode"
					: "users.verifyPasswordResetCode",
				this.code,
				res => {
					new Toast(res.message);
					if (res.status === "success") this.step = 3;
				}
			);
		},
		changePassword() {
			if (this.password.valid && !this.passwordAgain.valid)
				return new Toast("Please ensure the passwords match.");

			if (!this.password.valid)
				return new Toast("Please enter a valid password.");

			return this.socket.dispatch(
				this.mode === "set"
					? "users.changePasswordWithCode"
					: "users.changePasswordWithResetCode",
				this.code,
				this.password.value,
				res => {
					new Toast(res.message);
					if (res.status === "success") this.step = 4;
					else this.step = 5;
				}
			);
		}
	}
};
</script>

<style lang="less" scoped>
.night-mode {
	.label {
		color: var(--light-grey-2);
	}

	.skip-step {
		border: 0;
	}
}

h1,
h2,
p {
	margin: 0;
}

.content-wrapper {
	display: flex;
	flex-direction: column;
	align-items: center;
}

.container {
	padding: 25px;

	#title {
		color: var(--black);
		font-size: 42px;
	}

	.reset-status-box {
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
		height: 356px;

		h2 {
			margin-top: 10px;
			font-size: 21px;
			font-weight: 800;
			color: var(--black);
			text-align: center;
		}

		.success-icon {
			color: var(--green);
		}

		.error-icon {
			color: var(--dark-red);
		}

		.success-icon,
		.error-icon {
			font-size: 125px;
		}

		.button {
			margin-top: 36px;
		}
	}
}

.control {
	margin-bottom: 2px !important;
}
</style>
