<template>
    <div class="dms-page-component">
        <div v-if="isLoaded" class="container-fluid mt-3">
            <div class="row">
                <div class="col-md-3 d-md-block">
                    <sidebar :user="profile" />
                </div>

                <div class="col-md-5 offset-md-1 mb-5 order-2 order-md-1">
                    <h1 class="font-weight-bold mb-4">Direct Messages</h1>
                    <div v-if="threadsLoaded">
                        <div v-for="(thread, idx) in threads" class="card shadow-sm mb-1" style="border-radius:15px;">
                            <div class="card-body p-3">
                                <div class="media">
                                    <img :src="thread.accounts[0].avatar" width="45" height="45" class="shadow-sm mr-3" style="border-radius: 15px;" onerror="this.onerror=null;this.src='/storage/avatars/default.png?v=0';">

                                    <div class="media-body">
                                        <!-- <p class="lead mb-n2">{{ thread.accounts[0].display_name }}</p> -->
                                        <div class="d-flex justify-content-between align-items-start mb-1">
                                            <p class="dm-display-name font-weight-bold mb-0">&commat;{{ thread.accounts[0].acct }}</p>
                                            <p class="font-weight-bold small text-muted mb-0">{{ timeago(thread.last_status.created_at) }} ago</p>
                                        </div>

                                        <p class="dm-thread-summary text-muted mr-4" v-html="threadSummary(thread.last_status)"></p>
                                    </div>

                                    <router-link class="btn btn-link stretched-link align-self-center mr-n3" :to="`/i/web/direct/thread/${thread.accounts[0].id}`">
                                        <i class="fal fa-chevron-right fa-lg text-lighter"></i>
                                    </router-link>
                                </div>
                            </div>
                        </div>

                        <div v-if="!threads || !threads.length" class="row justify-content-center">
                            <div class="col-12 text-center">
                                <img src="/img/illustrations/dk-nature-man-monochrome.svg" class="img-fluid" style="opacity: 0.6;">
                                <p class="lead text-muted font-weight-bold">Your inbox is empty</p>
                            </div>
                        </div>

                        <div v-if="canLoadMore">
                            <intersect @enter="enterIntersect">
                                <dm-placeholder />
                            </intersect>
                        </div>
                    </div>

                    <div v-else>
                        <dm-placeholder />
                    </div>
                </div>

                <div class="col-md-3 d-md-block order-1 order-md-2 mb-4">
                    <button class="btn btn-dark shadow-sm font-weight-bold btn-block" @click="openCompose"><i class="far fa-envelope mr-1"></i> Compose</button>
                    <hr>
                    <div class="d-flex d-md-block">
                        <button
                            v-for="(tab, index) in tabs"
                            class="btn shadow-sm font-weight-bold btn-block text-capitalize mt-0 mt-md-2 mx-1 mx-md-0"
                            :class="[ index === tabIndex ? 'btn-primary' : 'btn-light' ]"
                            @click="toggleTab(index)"
                            >
                                {{ $t('directMessages.' + tab) }}
                        </button>
                    </div>
                </div>
            </div>

            <drawer />
        </div>
        <div v-else class="d-flex justify-content-center align-items-center" style="height:calc(100vh - 58px);">
            <b-spinner />
        </div>

        <b-modal
            ref="compose"
            hide-header
            hide-footer
            centered
            rounded
            size="md"
        >
            <div class="card shadow-none mt-4">
                <div class="card-body d-flex align-items-center justify-content-between flex-column" style="min-height: 50vh;">
                    <h3 class="font-weight-bold">New Direct Message</h3>
                    <div>
                        <p class="mb-0 font-weight-bold">Select Recipient</p>
                        <autocomplete
                            :search="composeSearch"
                            :disabled="composeLoading"
                            placeholder="@dansup"
                            aria-label="Search usernames"
                            :get-result-value="getTagResultValue"
                            @submit="onTagSubmitLocation"
                            :debounce-time="500"
                            ref="autocomplete"
                        >
                        </autocomplete>
                        <p class="small text-muted">Search by username, or webfinger (@dansup@pixelfed.social)</p>
                        <div style="width:300px;"></div>
                    </div>
                    <div>
                        <button class="btn btn-outline-dark rounded-pill font-weight-bold px-5 py-1" @click="closeCompose">Cancel</button>
                    </div>
                </div>
            </div>
        </b-modal>
    </div>
</template>

<script type="text/javascript">
    import Drawer from './partials/drawer.vue';
    import Sidebar from './partials/sidebar.vue';
    import Placeholder from './partials/placeholders/DirectMessagePlaceholder.vue';
    import Intersect from 'vue-intersect'
    import Autocomplete from '@trevoreyre/autocomplete-vue'
    import '@trevoreyre/autocomplete-vue/dist/style.css';
    import { parseLinkHeader } from '@web3-storage/parse-link-header';

    export default {
        components: {
            "drawer": Drawer,
            "sidebar": Sidebar,
            "intersect": Intersect,
            "dm-placeholder": Placeholder,
            "autocomplete": Autocomplete
        },

        data() {
            return {
                isLoaded: false,
                profile: undefined,
                canLoadMore: true,
                threadsLoaded: false,
                composeLoading: false,
                threads: [],
                tabIndex: 0,
                tabs: [
                    'inbox',
                    'sent',
                    'requests'
                ],
                nextUrl: false,
                ids: [],
                isIntersecting: false
            }
        },

        mounted() {
            this.profile = window._sharedData.user;
            this.isLoaded = true;
            this.fetchThreads();
        },

        methods: {
            fetchThreads() {
                axios.get('/api/v1/conversations', {
                    params: {
                        scope: this.tabs[this.tabIndex]
                    }
                })
                .then(res => {
                    let data = res.data.filter(m => {
                        return m && m.hasOwnProperty('last_status') && m.last_status;
                    })
                    if(res.headers && res.headers.link) {
                        const links = parseLinkHeader(res.headers.link);
                        if(links.next && links.next.url) {
                            this.nextUrl = links.next.url
                            this.canLoadMore = true;
                        } else {
                            this.nextUrl = false;
                            this.canLoadMore = false;
                        }
                    }
                    let ids = data.map(dm => dm.accounts[0].id);
                    this.ids = ids;
                    this.threads = data;
                    this.threadsLoaded = true;
                });
            },

            timeago(ts) {
                return App.util.format.timeAgo(ts);
            },

            enterIntersect() {
                if(this.isIntersecting || !this.nextUrl) {
                    return;
                }

                this.isIntersecting = true;

                axios.get(this.nextUrl)
                .then(res => {
                    if(res.headers && res.headers.link) {
                        const links = parseLinkHeader(res.headers.link);
                        if(links.next && links.next.url) {
                            this.nextUrl = links.next.url
                            this.canLoadMore = true;
                        } else {
                            this.nextUrl = false;
                            this.canLoadMore = false;
                        }
                    }
                    let data = res.data.filter(m => {
                        return m && m.hasOwnProperty('last_status') && m.last_status;
                    })
                    data.forEach(dm => {
                        if(this.ids.indexOf(dm.accounts[0].id) == -1) {
                            this.ids.push(dm.accounts[0].id);
                            this.threads.push(dm);
                        }
                    })
                    // this.threads.push(...res.data);
                    if(!res.data.length || res.data.length < 5) {
                        this.canLoadMore = false;
                        this.isIntersecting = false;
                        return;
                    }
                    this.isIntersecting = false;
                });
            },

            toggleTab(index) {
                event.currentTarget.blur();
                this.threadsLoaded = false;
                this.canLoadMore = true;
                this.nextUrl = false;
                this.tabIndex = index;
                this.fetchThreads();
            },

            threadSummary(status, len = 50) {
                if(status.pf_type == 'photo') {
                    let sender = this.profile.id == status.account.id;
                    let icon = '<div class="' + (sender ? 'text-muted' : 'text-primary') + ' border px-2 py-1 mt-1 rounded" style="font-size:11px;width: fit-content"><i class="far fa-image mr-1"></i> <span>';
                    icon += sender ? 'Sent a photo' : 'Received a photo';
                    return icon + '</span></div>';
                }

                if(status.pf_type == 'video') {
                    let sender = this.profile.id == status.account.id;
                    let icon = '<div class="' + (sender ? 'text-muted' : 'text-primary') + ' border px-2 py-1 mt-1 rounded" style="font-size:11px;width: fit-content"><i class="far fa-video mr-1"></i> <span>';
                    icon += sender ? 'Sent a video' : 'Received a video';
                    return icon + '</span></div>';
                }

                let res = '';

                if(this.profile.id == status.account.id) {
                    res += '<i class="far fa-reply-all fa-flip-both"></i> ';
                }

                let content = status.content;
                let text = content.replace(/(<([^>]+)>)/gi, "");

                if(text.length > len) {
                    return res + text.slice(0, len) + '...';
                }

                return res + text;
            },

            openCompose() {
                this.$refs.compose.show();
            },

            composeSearch(input) {
                if (input.length < 1) { return []; };
                let self = this;
                let results = [];
                return axios.post('/api/direct/lookup', {
                    q: input
                }).then(res => {
                    return res.data;
                });
            },

            getTagResultValue(result) {
                // return '@' + result.name;
                return result.local ? '@' + result.name : result.name;
            },

            onTagSubmitLocation(result) {
                //this.$refs.autocomplete.value = '';
                this.composeLoading = true;
                window.location.href = '/i/web/direct/thread/' + result.id;
                return;
            },

            closeCompose() {
                this.$refs.compose.hide();
            }
        }
    }
</script>

<style lang="scss" scoped>
    .dms-page-component {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

        .dm {
            &-thread-summary {
                margin-bottom: 0;
                font-size: 12px;
                line-height: 12px;
            }

            &-display-name {
                font-size: 16px;
            }
        }
    }

</style>
