<template>
    <div style="display:flex; flex-direction: column; height:100%; justify-content: center">
        <div class="card bg-light" style="width:400px;max-width:100%;margin:0 auto" v-if="!connected">
            <div class="alert alert-danger" v-show="error">{{error}}</div>
            <h3 class="card-header" style="margin-top:0;display:flex">
                {{l('title')}}
                <a href="#" @click.prevent="showLogs()" class="btn" style="flex:1;text-align:right">
                    <span class="fa fa-file-alt"></span> <span class="btn-text">{{l('logs.title')}}</span>
                </a>
            </h3>
            <div class="card-body">
                <h4 class="card-title">{{l('login.selectCharacter')}}</h4>
                <select v-model="selectedCharacter" class="form-control custom-select">
                    <option v-for="character in ownCharacters" :value="character">{{character.name}}</option>
                </select>
                <div style="text-align:right;margin-top:10px">
                    <button class="btn btn-primary" @click="connect" :disabled="connecting">
                        {{l(connecting ? 'login.connecting' : 'login.connect')}}
                    </button>
                </div>
            </div>
        </div>
        <chat v-else></chat>
        <modal :action="l('chat.disconnected.title')" :buttonText="l('action.cancel')" ref="reconnecting" @submit="cancelReconnect"
            :showCancel="false" buttonClass="btn-danger">
            <div class="alert alert-danger" v-show="error">{{error}}</div>
            {{l('chat.disconnected')}}
        </modal>
        <logs ref="logsDialog"></logs>
        <div v-if="version && !connected" style="position:absolute;bottom:0;right:0">{{version}}</div>
    </div>
</template>

<script lang="ts">
    import log from 'electron-log'; //tslint:disable-line:match-default-export-name
    import {Component, Hook, Prop} from '@f-list/vue-ts';
    import Vue from 'vue';
    import Modal from '../components/Modal.vue';
    import {InlineDisplayMode, SimpleCharacter} from '../interfaces';
    import {Keys} from '../keys';
    import ChatView from './ChatView.vue';
    import {errorToString, getKey} from './common';
    import core from './core';
    import l from './localize';
    import Logs from './Logs.vue';
    import {init as profileApiInit} from './profile_api';
    import { AdManager } from './ads/ad-manager';

    type BBCodeNode = Node & {bbcodeTag?: string, bbcodeParam?: string};

    function copyNode(str: string, node: BBCodeNode, end: Node, range: Range, flags: {endFound?: true}): string {
        if(node === end) flags.endFound = true;
        if(node.bbcodeTag !== undefined)
            str = `[${node.bbcodeTag}${node.bbcodeParam !== undefined ? `=${node.bbcodeParam}` : ''}]${str}[/${node.bbcodeTag}]`;
        if(node.nextSibling !== null && !flags.endFound) {
            if(node instanceof HTMLElement && getComputedStyle(node).display === 'block') str += '\r\n';
            str += scanNode(node.nextSibling!, end, range, flags);
        }
        if(node.parentElement === null) return str;
        return copyNode(str, node.parentNode!, end, range, flags);
    }

    function scanNode(node: BBCodeNode, end: Node, range: Range, flags: {endFound?: true}, hide?: boolean): string {
        let str = '';
        hide = hide || node instanceof HTMLElement && node.classList.contains('bbcode-pseudo');
        if(node === end) flags.endFound = true;
        if(node.bbcodeTag !== undefined) str += `[${node.bbcodeTag}${node.bbcodeParam !== undefined ? `=${node.bbcodeParam}` : ''}]`;
        if(node instanceof Text) str += node === range.endContainer ? node.nodeValue!.substr(0, range.endOffset) : node.nodeValue;
        else if(node instanceof HTMLImageElement) str += node.alt;
        if(node.firstChild !== null && !flags.endFound) str += scanNode(node.firstChild, end, range, flags, hide);
        if(node.bbcodeTag !== undefined) str += `[/${node.bbcodeTag}]`;
        if(node instanceof HTMLElement && getComputedStyle(node).display === 'block' && !flags.endFound) str += '\r\n';
        if(node.nextSibling !== null && !flags.endFound) str += scanNode(node.nextSibling, end, range, flags, hide);
        return hide ? '' : str;
    }

    @Component({
        components: {chat: ChatView, modal: Modal, logs: Logs}
    })
    export default class Chat extends Vue {
        @Prop({required: true})
        readonly ownCharacters!: SimpleCharacter[];
        @Prop({required: true})
        readonly defaultCharacter!: number;
        //tslint:disable-next-line:strict-boolean-expressions
        selectedCharacter = this.ownCharacters.find((x) => x.id === this.defaultCharacter) || this.ownCharacters[0];
        @Prop
        readonly version?: string;
        error = '';
        connecting = false;
        connected = false;
        l = l;
        copyPlain = false;

        @Hook('mounted')
        mounted(): void {
            document.title = l('title', core.connection.character);
            document.addEventListener('copy', ((e: ClipboardEvent) => {
                if(this.copyPlain) {
                    this.copyPlain = false;
                    return;
                }
                const selection = document.getSelection();
                if(selection === null || selection.isCollapsed) return;
                const range = selection.getRangeAt(0);
                let start = range.startContainer, end = range.endContainer;
                let startValue = '';
                if(start instanceof HTMLElement) {
                    start = start.childNodes[range.startOffset];
                    if(<Node | undefined>start === undefined) start = range.startContainer;
                    else startValue = start instanceof HTMLImageElement ? start.alt : scanNode(start.firstChild!, end, range, {});
                } else
                    startValue = start.nodeValue!.substring(range.startOffset, start === range.endContainer ? range.endOffset : undefined);
                if(end instanceof HTMLElement && range.endOffset > 0) end = end.childNodes[range.endOffset - 1];
                e.clipboardData!.setData('text/plain', copyNode(startValue, start, end, range, {}));
                e.preventDefault();
            }) as EventListener);
            window.addEventListener('keydown', (e) => {
                if(getKey(e) === Keys.KeyC && e.shiftKey && (e.ctrlKey || e.metaKey) && !e.altKey) {
                    this.copyPlain = true;
                    document.execCommand('copy');
                    e.preventDefault();
                }
            });
            core.connection.onEvent('closed', (isReconnect) => {
                log.debug(
                  'connection.closed',
                  {
                    character: core.characters.ownCharacter?.name,
                    error: this.error,
                    isReconnect
                  }
                );

                if(isReconnect) (<Modal>this.$refs['reconnecting']).show(true);
                if(this.connected) core.notifications.playSound('logout');
                this.connected = false;
                this.connecting = false;

                AdManager.onConnectionClosed();
                core.adCoordinator.clear();

                // tslint:disable-next-line:no-floating-promises
                core.siteSession.onConnectionClosed();

                document.title = l('title');
            });
            core.connection.onEvent('connecting', async() => {
                this.connecting = true;

                log.debug(
                  'connection.connecting',
                  {
                    character: core.characters.ownCharacter?.name
                  }
                );

                profileApiInit({
                    defaultCharacter: this.defaultCharacter, animateEicons: core.state.settings.animatedEicons, fuzzyDates: true,
                    inlineDisplayMode: InlineDisplayMode.DISPLAY_ALL
                }, this.ownCharacters);
                if(core.state.settings.notifications) await core.notifications.requestPermission();
            });
            core.connection.onEvent('connected', () => {
                log.debug(
                  'connection.connected',
                  {
                    character: core.characters.ownCharacter?.name
                  }
                );

                (<Modal>this.$refs['reconnecting']).hide();
                this.error = '';
                this.connecting = false;
                this.connected = true;
                core.notifications.playSound('login');
                document.title = l('title.connected', core.connection.character);

                // tslint:disable-next-line:no-floating-promises
                core.siteSession.onConnectionEstablished();
            });
            core.watch(() => core.conversations.hasNew, (hasNew) => {
                document.title = (hasNew ? '💬 ' : '') + l(core.connection.isOpen ? 'title.connected' : 'title', core.connection.character);
            });
            core.connection.onError((e) => {
                log.debug(
                  'connection.error',
                  {
                    error: errorToString(e),
                    character: core.characters.ownCharacter?.name
                  }
                );

                if((<Error & {request?: object}>e).request !== undefined) {//catch axios network errors
                    this.error = l('login.connectError', errorToString(e));
                    this.connecting = false;
                } else throw e;
            });
        }

        cancelReconnect(): void {
            core.connection.close();
            (<Modal>this.$refs['reconnecting']).hide();
        }

        showLogs(): void {
            (<Logs>this.$refs['logsDialog']).show();
        }

        async connect(): Promise<void> {
            this.connecting = true;

            // skipping await
            // tslint:disable-next-line: no-floating-promises
            core.notifications.initSounds(['attention', 'login', 'logout', 'modalert', 'newnote']);

            core.connection.connect(this.selectedCharacter.name);
        }
    }
</script>

<style lang="scss">
    .modal-footer {
        min-height: initial;
    }
</style>
