<template>
	<form @submit.prevent="editTaskSubmit()">
		<div class="field">
			<label class="label" for="tasktext">Task Text</label>
			<div class="control">
				<input v-focus :class="{ 'disabled': taskService.loading}" :disabled="taskService.loading" class="input"
					type="text" id="tasktext" placeholder="The task text is here..." v-model="taskEditTask.text">
			</div>
		</div>
		<div class="field">
			<label class="label" for="taskdescription">Description</label>
			<div class="control">
				<textarea :class="{ 'disabled': taskService.loading}" :disabled="taskService.loading" class="textarea"
					placeholder="The tasks description goes here..." id="taskdescription"
					v-model="taskEditTask.description"></textarea>
			</div>
		</div>

		<b>Reminder Dates</b>
		<div class="reminder-input"
			:class="{ 'overdue': (r < nowUnix && index !== (taskEditTask.reminderDates.length - 1))}"
			v-for="(r, index) in taskEditTask.reminderDates" :key="index">
			<flat-pickr
					:class="{ 'disabled': taskService.loading}"
					:disabled="taskService.loading"
					:v-model="taskEditTask.reminderDates"
					:config="flatPickerConfig"
					:id="'taskreminderdate' + index"
					:value="r"
					:data-index="index"
					placeholder="Add a new reminder...">
			</flat-pickr>
			<a v-if="index !== (taskEditTask.reminderDates.length - 1)" @click="removeReminderByIndex(index)">
				<icon icon="times"></icon>
			</a>
		</div>

		<div class="field">
			<label class="label" for="taskduedate">Due Date</label>
			<div class="control">
				<flat-pickr
						:class="{ 'disabled': taskService.loading}"
						class="input"
						:disabled="taskService.loading"
						v-model="taskEditTask.dueDate"
						:config="flatPickerConfig"
						id="taskduedate"
						placeholder="The tasks due date is here...">
				</flat-pickr>
			</div>
		</div>

		<div class="field">
			<label class="label" for="">Duration</label>
			<div class="control columns">
				<div class="column">
					<flat-pickr
							:class="{ 'disabled': taskService.loading}"
							class="input"
							:disabled="taskService.loading"
							v-model="taskEditTask.startDate"
							:config="flatPickerConfig"
							id="taskduedate"
							placeholder="Start date">
					</flat-pickr>
				</div>
				<div class="column">
					<flat-pickr
							:class="{ 'disabled': taskService.loading}"
							class="input"
							:disabled="taskService.loading"
							v-model="taskEditTask.endDate"
							:config="flatPickerConfig"
							id="taskduedate"
							placeholder="End date">
					</flat-pickr>
				</div>
			</div>
		</div>

		<div class="field">
			<label class="label" for="">Repeat after</label>
			<div class="control repeat-after-input columns">
				<div class="column">
					<input class="input" placeholder="Specify an amount..." v-model="taskEditTask.repeatAfter.amount"/>
				</div>
				<div class="column is-3">
					<div class="select">
						<select v-model="taskEditTask.repeatAfter.type">
							<option value="hours">Hours</option>
							<option value="days">Days</option>
							<option value="weeks">Weeks</option>
							<option value="months">Months</option>
							<option value="years">Years</option>
						</select>
					</div>
				</div>
			</div>
		</div>

		<div class="field">
			<label class="label" for="">Priority</label>
			<div class="control priority-select">
				<div class="select">
					<select v-model="taskEditTask.priority">
						<option :value="priorities.UNSET">Unset</option>
						<option :value="priorities.LOW">Low</option>
						<option :value="priorities.MEDIUM">Medium</option>
						<option :value="priorities.HIGH">High</option>
						<option :value="priorities.URGENT">Urgent</option>
						<option :value="priorities.DO_NOW">DO NOW</option>
					</select>
				</div>
			</div>
		</div>

		<div class="field">
			<label class="label">Percent Done</label>
			<div class="control">
				<div class="select">
					<select v-model.number="taskEditTask.percentDone">
						<option value="0">0%</option>
						<option value="0.1">10%</option>
						<option value="0.2">20%</option>
						<option value="0.3">30%</option>
						<option value="0.4">40%</option>
						<option value="0.5">50%</option>
						<option value="0.6">60%</option>
						<option value="0.7">70%</option>
						<option value="0.8">80%</option>
						<option value="0.9">90%</option>
						<option value="1">100%</option>
					</select>
				</div>
			</div>
		</div>

		<div class="field">
			<label class="label">Color</label>
			<div class="control">
				<verte
						v-model="taskEditTask.hexColor"
						menuPosition="top"
						picker="square"
						model="hex"
						:enableAlpha="false"
						:rgbSliders="true">
				</verte>
			</div>
		</div>

		<div class="field">
			<label class="label" for="">Assignees</label>
			<ul class="assingees">
				<li v-for="(a, index) in taskEditTask.assignees" :key="a.id">
					{{a.username}}
					<a @click="deleteAssigneeByIndex(index)">
						<icon icon="times"/>
					</a>
				</li>
			</ul>
		</div>

		<div class="field has-addons">
			<div class="control is-expanded">
				<multiselect
						v-model="newAssignee"
						:options="foundUsers"
						:multiple="false"
						:searchable="true"
						:loading="listUserService.loading"
						:internal-search="true"
						@search-change="findUser"
						placeholder="Type to search"
						label="username"
						track-by="id">
					<template slot="clear" slot-scope="props">
						<div class="multiselect__clear" v-if="newAssignee !== null && newAssignee.id !== 0"
							@mousedown.prevent.stop="clearAllFoundUsers(props.search)"></div>
					</template>
					<span slot="noResult">Oops! No user found. Consider changing the search query.</span>
				</multiselect>
			</div>
			<div class="control">
				<a @click="addAssignee" class="button is-primary fullheight">
									<span class="icon is-small">
										<icon icon="plus"/>
									</span>
				</a>
			</div>
		</div>

		<div class="field">
			<label class="label">Labels</label>
			<div class="control">
				<multiselect
						:multiple="true"
						:close-on-select="false"
						:clear-on-select="true"
						:options-limit="300"
						:hide-selected="true"
						v-model="taskEditTask.labels"
						:options="foundLabels"
						:searchable="true"
						:loading="labelService.loading || labelTaskService.loading"
						:internal-search="true"
						@search-change="findLabel"
						@select="addLabel"
						placeholder="Type to search"
						label="title"
						track-by="id"
						:taggable="true"
						@tag="createAndAddLabel"
						tag-placeholder="Add this as new label"
				>
					<template slot="tag" slot-scope="{ option, remove }">
						<span class="tag"
							:style="{'background': option.hex_color, 'color': option.textColor}">
							<span>{{ option.title }}</span>
							<a class="delete is-small" @click="removeLabel(option)"></a>
						</span>
					</template>
					<template slot="clear" slot-scope="props">
						<div class="multiselect__clear" v-if="taskEditTask.labels.length"
							@mousedown.prevent.stop="clearAllLabels(props.search)"></div>
					</template>
				</multiselect>
			</div>
		</div>

		<div class="field" v-for="(rts, kind ) in task.related_tasks" :key="kind" v-if="rts.length > 0">
			<label class="label">{{ relationKinds[kind] }}</label>
			<div class="tasks noborder">
				<div class="task" v-for="t in rts" :key="t.id">
					<label>
					<span class="tasktext" :class="{ 'done': t.done}">
						{{t.text}}
					</span>
					</label>
					<a class="remove" @click="removeTaskRelation({relation_kind: kind, other_task_id: t.id})">
						<icon icon="trash-alt"/>
					</a>
				</div>
			</div>

		</div>

		<div class="field">
			<label class="label">New Task Relation</label>
			<div class="field">
				<div class="control is-expanded">
					<multiselect
							v-model="newTaskRelationTask"
							:options="foundTasks"
							:multiple="false"
							:searchable="true"
							:loading="taskService.loading"
							:internal-search="true"
							@search-change="findTasks"
							placeholder="Type to search"
							label="text"
							track-by="id">
						<template slot="clear" slot-scope="props">
							<div class="multiselect__clear"
								v-if="newTaskRelationTask !== null && newTaskRelationTask.id !== 0"
								@mousedown.prevent.stop="clearAllFoundTasks(props.search)"></div>
						</template>
						<span slot="noResult">No task found. Consider changing the search query.</span>
					</multiselect>
				</div>
			</div>
			<div class="field has-addons">
				<div class="control is-expanded">
					<div class="select is-fullwidth">
						<select v-model="newTaskRelationKind">
							<option value="unset">Select a kind of relation</option>
							<option v-for="(label, rk) in relationKinds" :key="rk" :value="rk">
								{{ label }}
							</option>
						</select>
					</div>
				</div>
				<div class="control">
					<a class="button is-primary" @click="addTaskRelation()">Add task Relation</a>
				</div>
			</div>
		</div>

		<button type="submit" class="button is-success is-fullwidth" :class="{ 'is-loading': taskService.loading}">
			Save
		</button>

	</form>
</template>

<script>
	import message from '../../message'
	import flatPickr from 'vue-flatpickr-component'
	import 'flatpickr/dist/flatpickr.css'
	import multiselect from 'vue-multiselect'
	import {differenceWith} from 'lodash'
	import verte from 'verte'
	import 'verte/dist/verte.css'

	import ListService from '../../services/list'
	import TaskService from '../../services/task'
	import TaskModel from '../../models/task'
	import UserModel from '../../models/user'
	import ListUserService from '../../services/listUsers'
	import priorities from '../../models/priorities'
	import LabelTaskService from '../../services/labelTask'
	import LabelService from '../../services/label'
	import LabelTaskModel from '../../models/labelTask'
	import LabelModel from '../../models/label'
	import relationKinds from '../../models/relationKinds'
	import TaskRelationModel from '../../models/taskRelation'
	import TaskRelationService from '../../services/taskRelation'

	export default {
		name: 'edit-task',
		data() {
			return {
				listID: this.$route.params.id,
				listService: ListService,
				taskService: TaskService,

				priorities: priorities,
				list: {},
				newTask: TaskModel,
				isTaskEdit: false,
				taskEditTask: TaskModel,
				lastReminder: 0,
				nowUnix: new Date(),
				flatPickerConfig: {
					altFormat: 'j M Y H:i',
					altInput: true,
					dateFormat: 'Y-m-d H:i',
					enableTime: true,
					onOpen: this.updateLastReminderDate,
					onClose: this.addReminderDate,
				},

				newAssignee: UserModel,
				listUserService: ListUserService,
				foundUsers: [],

				foundTasks: [],
				relationKinds: relationKinds,
				newTaskRelationTask: TaskModel,
				newTaskRelationKind: 'unset',
				taskRelationService: TaskRelationService,

				labelService: LabelService,
				labelTaskService: LabelTaskService,
				foundLabels: [],
				labelTimeout: null,
			}
		},
		components: {
			flatPickr,
			multiselect,
			verte,
		},
		props: {
			task: {
				type: TaskModel,
				required: true,
			}
		},
		watch: {
			task() {
				this.taskEditTask = this.task
			}
		},
		created() {
			this.listService = new ListService()
			this.taskService = new TaskService()
			this.newTask = new TaskModel()
			this.listUserService = new ListUserService()
			this.newAssignee = new UserModel()
			this.labelService = new LabelService()
			this.labelTaskService = new LabelTaskService()
			this.taskRelationService = new TaskRelationService()
			this.newTaskRelationTask = new TaskModel()
			this.taskEditTask = this.task
		},
		methods: {
			editTaskSubmit() {
				this.taskService.update(this.taskEditTask)
					.then(r => {
						this.$set(this, 'taskEditTask', r)
						message.success({message: 'The task was successfully updated.'}, this)
					})
					.catch(e => {
						message.error(e, this)
					})
			},
			updateLastReminderDate(selectedDates) {
				this.lastReminder = +new Date(selectedDates[0])
			},
			addReminderDate(selectedDates, dateStr, instance) {
				let newDate = +new Date(selectedDates[0])

				// Don't update if nothing changed
				if (newDate === this.lastReminder) {
					return
				}

				let index = parseInt(instance.input.dataset.index)
				this.taskEditTask.reminderDates[index] = newDate

				let lastIndex = this.taskEditTask.reminderDates.length - 1
				// put a new null at the end if we changed something
				if (lastIndex === index && !isNaN(newDate)) {
					this.taskEditTask.reminderDates.push(null)
				}
			},
			removeReminderByIndex(index) {
				this.taskEditTask.reminderDates.splice(index, 1)
				// Reset the last to 0 to have the "add reminder" button
				this.taskEditTask.reminderDates[this.taskEditTask.reminderDates.length - 1] = null
			},
			addAssignee() {
				this.taskEditTask.assignees.push(this.newAssignee)
			},
			deleteAssigneeByIndex(index) {
				this.taskEditTask.assignees.splice(index, 1)
			},
			findUser(query) {
				if (query === '') {
					this.clearAllFoundUsers()
					return
				}

				this.listUserService.getAll({listID: this.$route.params.id}, {s: query})
					.then(response => {
						// Filter the results to not include users who are already assigned
						this.$set(this, 'foundUsers', differenceWith(response, this.taskEditTask.assignees, (first, second) => {
							return first.id === second.id
						}))
					})
					.catch(e => {
						message.error(e, this)
					})
			},
			clearAllFoundUsers() {
				this.$set(this, 'foundUsers', [])
			},
			findLabel(query) {
				if (query === '') {
					this.clearAllLabels()
					return
				}

				if (this.labelTimeout !== null) {
					clearTimeout(this.labelTimeout)
				}

				// Delay the search 300ms to not send a request on every keystroke
				this.labelTimeout = setTimeout(() => {
					this.labelService.getAll({}, {s: query})
						.then(response => {
							this.$set(this, 'foundLabels', differenceWith(response, this.taskEditTask.labels, (first, second) => {
								return first.id === second.id
							}))
							this.labelTimeout = null
						})
						.catch(e => {
							message.error(e, this)
						})
				}, 300)
			},
			clearAllLabels() {
				this.$set(this, 'foundLabels', [])
			},
			addLabel(label) {
				let labelTask = new LabelTaskModel({taskID: this.taskEditTask.id, label_id: label.id})
				this.labelTaskService.create(labelTask)
					.then(() => {
						message.success({message: 'The label was successfully added.'}, this)
					})
					.catch(e => {
						message.error(e, this)
					})
			},
			removeLabel(label) {
				let labelTask = new LabelTaskModel({taskID: this.taskEditTask.id, label_id: label.id})
				this.labelTaskService.delete(labelTask)
					.then(() => {
						// Remove the label from the list
						for (const l in this.taskEditTask.labels) {
							if (this.taskEditTask.labels[l].id === label.id) {
								this.taskEditTask.labels.splice(l, 1)
							}
						}
						message.success({message: 'The label was successfully removed.'}, this)
					})
					.catch(e => {
						message.error(e, this)
					})
			},
			createAndAddLabel(title) {
				let newLabel = new LabelModel({title: title})
				this.labelService.create(newLabel)
					.then(r => {
						this.addLabel(r)
						this.taskEditTask.labels.push(r)
					})
					.catch(e => {
						message.error(e, this)
					})
			},
			findTasks(query) {
				if (query === '') {
					this.clearAllFoundTasks()
					return
				}

				this.taskService.getAll({}, {s: query})
					.then(response => {
						this.$set(this, 'foundTasks', response)
					})
					.catch(e => {
						message.error(e, this)
					})
			},
			clearAllFoundTasks() {
				this.$set(this, 'foundTasks', [])
			},
			addTaskRelation() {
				let rel = new TaskRelationModel({
					task_id: this.taskEditTask.id,
					other_task_id: this.newTaskRelationTask.id,
					relation_kind: this.newTaskRelationKind,
				})
				this.taskRelationService.create(rel)
					.then(() => {
						if (!this.taskEditTask.related_tasks[this.newTaskRelationKind]) {
							this.$set(this.taskEditTask.related_tasks, this.newTaskRelationKind, [])
						}
						this.taskEditTask.related_tasks[this.newTaskRelationKind].push(this.newTaskRelationTask)
						this.newTaskRelationKind = 'unset'
						this.newTaskRelationTask = new TaskModel()
						message.success({message: 'The task relation was created successfully'}, this)
					})
					.catch(e => {
						message.error(e, this)
					})
			},
			removeTaskRelation(relation) {
				let rel = new TaskRelationModel({
					relation_kind: relation.relation_kind,
					task_id: this.taskEditTask.id,
					other_task_id: relation.other_task_id,
				})
				this.taskRelationService.delete(rel)
					.then(r => {
						Object.keys(this.taskEditTask.related_tasks).forEach(relationKind  => {
							for (const t in this.taskEditTask.related_tasks[relationKind]) {
								if (this.taskEditTask.related_tasks[relationKind][t].id === relation.other_task_id && relationKind === relation.relation_kind) {
									this.taskEditTask.related_tasks[relationKind].splice(t, 1)
								}
							}
						})
						message.success(r, this)
					})
					.catch(e => {
						message.error(e, this)
					})
			},
		},
	}
</script>

<style scoped>
	form {
		margin-bottom: 1em;
	}
</style>