{% extends "base.html" %}
{% set active = 'downloads' %}
{% block title %}Téléchargements — Ohm Stream{% endblock %}

{% block content %}
<div x-data="downloadsPage()" x-init="connect()" @click.outside="confirmDel = null">
  <div style="display:flex;align-items:center;gap:0.8rem;margin-bottom:1.6rem;flex-wrap:wrap">
    <div>
      <h1 class="page-title">Téléchargements</h1>
      <p class="page-sub" style="margin-bottom:0">
        <span x-text="groups.length"></span> animé(s) · <span x-text="items.length"></span> épisode(s) —
        <span :style="connected ? 'color:var(--success)' : 'color:var(--danger)'"
              x-text="connected ? '● temps réel' : '○ reconnecté…'"></span>
      </p>
    </div>
    <div style="flex:1"></div>
    <button class="btn btn-ghost btn-sm" @click="clearFinished()">🧹 Nettoyer</button>
    <button class="btn btn-danger btn-sm" @click="action('cancel-all')">✖ Tout annuler</button>
  </div>

  <template x-if="items.length === 0">
    <div class="empty-state"><div class="big">📭</div>Aucun téléchargement. Lance une recherche !</div>
  </template>

  <div class="dl-groups">
    <template x-for="g in groups" :key="g.name">
      <div class="dl-group">
        <div class="dl-group-head" @click="toggle(g)">
          <span class="dl-chevron" :class="{ open: isOpen(g) }">▶</span>
          <span class="dl-group-title" x-text="g.name"></span>
          <span class="dl-group-meta">
            <span class="m-downloading" x-show="g.counts.downloading"
                  x-text="'⬇ ' + g.counts.downloading"></span>
            <span class="m-pending" x-show="g.counts.pending + g.counts.paused"
                  x-text="'⏳ ' + (g.counts.pending + g.counts.paused)"></span>
            <span class="m-done" x-show="g.counts.done" x-text="'✔ ' + g.counts.done"></span>
            <span class="m-failed" x-show="g.counts.failed + g.counts.cancelled"
                  x-text="'✖ ' + (g.counts.failed + g.counts.cancelled)"></span>
          </span>
          <div style="flex:1"></div>
          <span class="dl-group-size" x-show="g.bytes" x-text="fmtBytes(g.bytes)"></span>
          <div class="dl-actions" @click.stop>
            <button class="btn btn-sm btn-ghost" title="Retirer les terminés de ce groupe"
                    x-show="g.counts.done + g.counts.failed + g.counts.cancelled"
                    @click="cleanGroup(g)">🧹</button>
            <button class="btn btn-sm btn-danger" title="Annuler les téléchargements actifs de ce groupe"
                    x-show="g.counts.active" @click="cancelGroup(g)">✖</button>
          </div>
        </div>

        <div class="dl-group-body" x-show="isOpen(g)" x-cloak>
          <template x-for="d in g.items" :key="d.id">
            <div class="dl-row">
              <div class="dl-head">
                <span class="status-pill" :class="'status-' + d.status" x-text="d.status_label"></span>
                <span class="dl-title" x-text="d._label || d.title"></span>
                <div class="dl-actions">
                  <template x-if="d.status === 'downloading'">
                    <button class="btn btn-sm btn-ghost" @click="action(d.id + '/pause')">⏸</button>
                  </template>
                  <template x-if="d.status === 'paused'">
                    <button class="btn btn-sm btn-ghost" @click="action(d.id + '/resume')">▶</button>
                  </template>
                  <template x-if="['failed', 'cancelled'].includes(d.status)">
                    <button class="btn btn-sm btn-ghost" @click="action(d.id + '/retry')">↻</button>
                  </template>
                  <template x-if="['pending', 'downloading', 'paused'].includes(d.status)">
                    <button class="btn btn-sm btn-danger" @click="action(d.id + '/cancel')">✖</button>
                  </template>
                  <template x-if="d.status === 'done'">
                    <a class="btn btn-sm" :href="'/watch/' + d.id">▶ Regarder</a>
                  </template>
                  <div class="dl-del-wrap">
                    <button class="btn btn-sm btn-ghost" title="Supprimer"
                            @click.stop="confirmDel = confirmDel === d.id ? null : d.id">🗑</button>
                    <div class="dl-menu" x-show="confirmDel === d.id" x-cloak>
                      <button class="btn btn-sm" @click="remove(d, false)"
                              x-text="d.status === 'done' ? 'Liste seulement' : 'Supprimer'"></button>
                      <template x-if="d.status === 'done'">
                        <button class="btn btn-sm btn-danger" @click="remove(d, true)">Liste + fichier</button>
                      </template>
                    </div>
                  </div>
                </div>
              </div>
              <div style="display:flex;align-items:center;gap:0.9rem">
                <div class="progress">
                  <div class="progress-fill" :class="d.status"
                       :style="`width:${d.percent ?? (d.status === 'done' ? 100 : 0)}%`"></div>
                </div>
                <span style="min-width:4rem;text-align:right;font-size:0.85rem;font-weight:600"
                      x-text="d.percent != null ? d.percent + '%' : (d.status === 'done' ? '100%' : '—')"></span>
              </div>
              <div class="dl-stats">
                <span x-text="fmtBytes(d.downloaded_bytes) + ' / ' + (d.total_bytes ? fmtBytes(d.total_bytes) : '?')"></span>
                <span x-show="d.speed_bps" x-text="'⚡ ' + fmtBytes(d.speed_bps) + '/s'"></span>
                <span x-show="d.eta_seconds != null" x-text="'⏱ ' + fmtEta(d.eta_seconds)"></span>
                <span x-show="d.error" style="color:var(--danger)" x-text="d.error"></span>
              </div>
            </div>
          </template>
        </div>
      </div>
    </template>
  </div>
</div>
{% endblock %}

{% block scripts %}
<script>
function downloadsPage() {
  return {
    items: [], connected: false, es: null,
    confirmDel: null,   // id de l'épisode dont le menu 🗑 est ouvert
    toggled: {},        // choix manuel de repli/dépliage par groupe

    connect() {
      this.es = new EventSource('/api/downloads/events');
      this.es.onopen = () => this.connected = true;
      this.es.onerror = () => this.connected = false;
      this.es.onmessage = (ev) => {
        const msg = JSON.parse(ev.data);
        if (msg.type === 'snapshot') this.items = msg.items.map(d => this.decorate(d));
        else if (msg.type === 'update') this.upsert(this.decorate(msg.item));
        else if (msg.type === 'removed') this.items = this.items.filter(d => d.id !== msg.id);
      };
    },

    // Découpe « Anime - E12 (VOSTFR) » → base « Anime », numéro, libellé d'épisode
    decorate(d) {
      const m = d.title.match(/^(.*?)[\s\-–—]*(?:épisode|episode|ep|e)\s*(\d+(?:\.\d+)?)(.*)$/i);
      if (m && m[1].trim()) {
        d._base = m[1].trim();
        d._num = parseFloat(m[2]);
        d._label = ('E' + m[2] + ' ' + (m[3] || '')).replace(/\s+/g, ' ').trim();
      } else {
        d._base = d.title;
        d._num = null;
        d._label = '';
      }
      return d;
    },

    get groups() {
      const map = new Map();
      for (const d of this.items) {
        if (!map.has(d._base)) map.set(d._base, []);
        map.get(d._base).push(d);
      }
      const groups = [];
      for (const [name, list] of map) {
        const c = { downloading: 0, pending: 0, paused: 0, done: 0, failed: 0, cancelled: 0 };
        for (const d of list) c[d.status]++;
        c.active = c.downloading + c.pending + c.paused;
        list.sort((a, b) => (a._num ?? Infinity) - (b._num ?? Infinity) || a.id - b.id);
        groups.push({
          name, items: list, counts: c,
          bytes: list.reduce((s, d) => s + (d.status === 'done' ? d.total_bytes || 0 : 0), 0),
        });
      }
      const prio = g => g.counts.downloading ? 0 : g.counts.active ? 1 : 2;
      groups.sort((a, b) => prio(a) - prio(b) || a.name.localeCompare(b.name, 'fr'));
      return groups;
    },

    isOpen(g) {
      const t = this.toggled[g.name];
      return t !== undefined ? t : g.counts.active > 0;
    },

    toggle(g) {
      this.toggled[g.name] = !this.isOpen(g);
    },

    upsert(item) {
      const i = this.items.findIndex(d => d.id === item.id);
      if (i >= 0) this.items[i] = item;
      else {
        this.items.unshift(item);
        delete this.toggled[item._base];  // nouveau groupe/épisode → retour au comportement par défaut
      }
    },

    async action(path) {
      await fetch('/api/downloads/' + path, { method: 'POST' });
    },

    async remove(d, deleteFile) {
      this.confirmDel = null;
      this.items = this.items.filter(i => i.id !== d.id);
      await fetch('/api/downloads/' + d.id + (deleteFile ? '?delete_file=true' : ''), { method: 'DELETE' });
      toast(deleteFile ? '🗑 Épisode et fichier supprimés' : '🗑 Retiré de la liste');
    },

    async clearFinished() {
      await this.action('clear-finished');
      const res = await fetch('/api/downloads');
      this.items = (await res.json()).map(d => this.decorate(d));
    },

    async cleanGroup(g) {
      const ids = g.items
        .filter(d => ['done', 'failed', 'cancelled'].includes(d.status))
        .map(d => d.id);
      this.items = this.items.filter(d => !ids.includes(d.id));
      await Promise.all(ids.map(id => fetch('/api/downloads/' + id, { method: 'DELETE' })));
      toast('🧹 ' + ids.length + ' épisode(s) retiré(s) : ' + g.name);
    },

    async cancelGroup(g) {
      const actives = g.items.filter(d => ['pending', 'downloading', 'paused'].includes(d.status));
      await Promise.all(actives.map(d => this.action(d.id + '/cancel')));
      toast('✖ ' + actives.length + ' téléchargement(s) annulé(s) : ' + g.name);
    },

    fmtBytes(n) {
      if (n == null) return '?';
      const units = ['o', 'Ko', 'Mo', 'Go'];
      let i = 0;
      while (n >= 1024 && i < units.length - 1) { n /= 1024; i++; }
      return n.toFixed(i ? 1 : 0) + ' ' + units[i];
    },

    fmtEta(s) {
      if (s < 60) return s + 's';
      if (s < 3600) return Math.floor(s / 60) + 'min';
      return Math.floor(s / 3600) + 'h' + String(Math.floor((s % 3600) / 60)).padStart(2, '0');
    },
  };
}
</script>
{% endblock %}