<template>
	<div class="loader-container" :class="{ 'is-loading': taskCollectionService.loading}">
		<div class="search">
			<div class="field has-addons" :class="{ 'hidden': !showTaskSearch }">
				<div class="control has-icons-left has-icons-right">
					<input
							class="input"
							type="text"
							placeholder="Search"
							v-focus
							v-model="searchTerm"
							@keyup.enter="searchTasks"
							@blur="hideSearchBar()"/>
					<span class="icon is-left">
						<icon icon="search"/>
					</span>
				</div>
				<div class="control">
					<button
							class="button noshadow is-primary"
							@click="searchTasks"
							:class="{'is-loading': taskCollectionService.loading}">
						Search
					</button>
				</div>
			</div>
			<button class="button" @click="showTaskSearch = !showTaskSearch" v-if="!showTaskSearch">
				<span class="icon">
					<icon icon="search"/>
				</span>
			</button>
		</div>

		<div class="field task-add" v-if="!list.isArchived">
			<div class="field is-grouped">
				<p class="control has-icons-left is-expanded" :class="{ 'is-loading': taskService.loading}">
					<input v-focus class="input" :class="{ 'disabled': taskService.loading}" v-model="newTaskText" type="text" placeholder="Add a new task..." @keyup.enter="addTask()"/>
					<span class="icon is-small is-left">
						<icon icon="tasks"/>
					</span>
				</p>
				<p class="control">
					<button class="button is-success" :disabled="newTaskText.length < 3" @click="addTask()">
						<span class="icon is-small">
							<icon icon="plus"/>
						</span>
						Add
					</button>
				</p>
			</div>
			<p class="help is-danger" v-if="showError && newTaskText.length < 3">
				Please specify at least three characters.
			</p>
		</div>

		<div class="columns">
			<div class="column">
				<div class="tasks" v-if="tasks && tasks.length > 0" :class="{'short': isTaskEdit}">
					<div class="task" v-for="t in tasks" :key="t.id">
						<single-task-in-list :the-task="t" @taskUpdated="updateTasks" task-detail-route="task.detail"/>
						<div @click="editTask(t.id)" class="icon settings" v-if="!list.isArchived">
							<icon icon="pencil-alt"/>
						</div>
					</div>
				</div>
			</div>
			<div class="column is-4" v-if="isTaskEdit">
				<div class="card taskedit">
					<header class="card-header">
						<p class="card-header-title">
							Edit Task
						</p>
						<a class="card-header-icon" @click="isTaskEdit = false">
							<span class="icon">
								<icon icon="angle-right"/>
							</span>
						</a>
					</header>
					<div class="card-content">
						<div class="content">
							<edit-task :task="taskEditTask"/>
						</div>
					</div>
				</div>
			</div>
		</div>

		<nav class="pagination is-centered" role="navigation" aria-label="pagination" v-if="taskCollectionService.totalPages > 1">
			<router-link class="pagination-previous" :to="getRouteForPagination(currentPage - 1)" tag="button" :disabled="currentPage === 1">Previous</router-link>
			<router-link class="pagination-next" :to="getRouteForPagination(currentPage + 1)" tag="button" :disabled="currentPage === taskCollectionService.totalPages">Next page</router-link>
			<ul class="pagination-list">
				<template v-for="(p, i) in pages">
					<li :key="'page'+i" v-if="p.isEllipsis"><span class="pagination-ellipsis">&hellip;</span></li>
					<li :key="'page'+i" v-else>
						<router-link :to="getRouteForPagination(p.number)" :class="{'is-current': p.number === currentPage}" class="pagination-link" :aria-label="'Goto page ' + p.number">{{ p.number }}</router-link>
					</li>
				</template>
			</ul>
		</nav>

		<!-- This router view is used to show the task popup while keeping the kanban board itself -->
		<transition name="modal">
			<router-view/>
		</transition>

	</div>
</template>

<script>
	import TaskService from '../../../services/task'
	import EditTask from '../../tasks/edit-task'
	import TaskModel from '../../../models/task'
	import SingleTaskInList from '../../tasks/reusable/singleTaskInList'
	import taskList from '../../tasks/helpers/taskList'
	import {saveListView} from '../../../helpers/saveListView'

	export default {
		name: 'List',
		data() {
			return {
				taskService: TaskService,
				list: {},
				isTaskEdit: false,
				taskEditTask: TaskModel,
				newTaskText: '',

				showError: false,
			}
		},
		mixins: [
			taskList,
		],
		components: {
			SingleTaskInList,
			EditTask,
		},
		created() {
			this.taskService = new TaskService()

			// Save the current list view to local storage
			// We use local storage and not vuex here to make it persistent across reloads.
			saveListView(this.$route.params.listId, this.$route.name)
		},
		methods: {
			// This function initializes the tasks page and loads the first page of tasks
			initTasks(page, search = '') {
				this.taskEditTask = null
				this.isTaskEdit = false
				this.loadTasks(page, search)
			},
			addTask() {
				if (this.newTaskText.length < 3) {
					this.showError = true
					return
				}
				this.showError = false

				let task = new TaskModel({title: this.newTaskText, listId: this.$route.params.listId})
				this.taskService.create(task)
					.then(r => {
						this.tasks.push(r)
						this.sortTasks()
						this.newTaskText = ''
						this.success({message: 'The task was successfully created.'}, this)
					})
					.catch(e => {
						this.error(e, this)
					})
			},
			editTask(id) {
				// Find the selected task and set it to the current object
				let theTask = this.getTaskById(id) // Somehow this does not work if we directly assign this to this.taskEditTask
				this.taskEditTask = theTask
				this.isTaskEdit = true
			},
			getTaskById(id) {
				for (const t in this.tasks) {
					if (this.tasks[t].id === parseInt(id)) {
						return this.tasks[t]
					}
				}
				return {} // FIXME: This should probably throw something to make it clear to the user noting was found
			},
			updateTasks(updatedTask) {
				for (const t in this.tasks) {
					if (this.tasks[t].id === updatedTask.id) {
						this.$set(this.tasks, t, updatedTask)
						break
					}
				}
				this.sortTasks()
			},
		}
	}
</script>