{% extends "base.html" %}
{% block title %}Fan-out · Harbormaster{% endblock %}
{% block content %}

<nav class="mb-4 text-sm text-gray-400">
  <a href="/" class="hover:text-cyan-400">← Dashboard</a>
  <span class="mx-2 text-gray-700">/</span>
  <span class="text-gray-300">Fan-out ask</span>
</nav>

<header class="mb-6">
  <h2 class="text-xl font-bold">Fan-out ask</h2>
  <p class="text-sm text-gray-400 mt-1">
    Ask the same question across multiple projects in parallel.
    Returns one section per target. Powered by
    <code class="text-cyan-400">fan_out_ask</code> (v1.0.0a13+).
  </p>
</header>

<section x-data='fanOutForm({
           projects: {{ project_names | tojson }},
           hosts: {{ host_labels | tojson }},
         })'
         x-init="restoreFromUrl()"
         class="border border-gray-800 rounded-lg p-4 bg-gray-900/40">
  <form @submit.prevent="run()" class="space-y-3">
    <div>
      <label class="text-sm text-gray-300 font-bold mb-1 block">Question</label>
      <textarea x-model="question" rows="3" required minlength="3"
                :disabled="loading"
                placeholder="e.g. what testing strategy is in use?"
                class="w-full bg-gray-950 border border-gray-800 rounded px-3 py-2 text-sm focus:border-cyan-700 focus:outline-none resize-y"></textarea>
    </div>
    <div class="flex flex-wrap gap-4 text-xs text-gray-400">
      <label class="flex items-center gap-1.5">
        max_concurrency
        <input type="number" min="1" max="10" x-model.number="maxConcurrency"
               class="w-14 bg-gray-950 border border-gray-800 rounded px-2 py-1 text-center">
      </label>
      <label class="flex items-center gap-1.5">
        max_turns
        <input type="number" min="1" max="10" x-model.number="maxTurns"
               class="w-14 bg-gray-950 border border-gray-800 rounded px-2 py-1 text-center">
      </label>
      <label class="flex items-center gap-1.5">
        host
        <select x-model="host" class="bg-gray-950 border border-gray-800 rounded px-2 py-1">
          <template x-for="h in hosts"><option :value="h" x-text="h"></option></template>
        </select>
      </label>
    </div>
    <div>
      <div class="flex items-baseline justify-between mb-1">
        <label class="text-sm text-gray-300 font-bold">Targets</label>
        <div class="text-xs text-gray-500 flex gap-3">
          <button type="button" @click="selectAll()" class="hover:text-cyan-400">all</button>
          <button type="button" @click="selectNone()" class="hover:text-cyan-400">none</button>
          <span x-text="`${selected.length} of ${projects.length} selected`"></span>
        </div>
      </div>
      <div class="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-1 max-h-48 overflow-y-auto border border-gray-800 rounded p-2">
        <template x-for="p in projects" :key="p">
          <label class="flex items-center gap-1.5 text-xs hover:bg-gray-800/50 px-1 py-0.5 rounded cursor-pointer">
            <input type="checkbox" :value="p" x-model="selected" class="accent-cyan-500">
            <span class="truncate" x-text="p"></span>
          </label>
        </template>
      </div>
    </div>
    <div class="flex items-center gap-3">
      <button type="submit"
              :disabled="loading || question.trim().length < 3 || selected.length === 0"
              class="bg-cyan-700 hover:bg-cyan-600 disabled:bg-gray-800 disabled:text-gray-500 text-white font-bold px-4 py-2 rounded transition">
        <span x-show="!loading">Run fan-out</span>
        <span x-show="loading">…</span>
      </button>
      <button type="button" x-show="loading" @click="abort()"
              class="text-amber-400 hover:text-amber-300 underline text-xs">stop</button>
      <!-- v4.0.0a2: copy share link. Persists URL first, then copies. -->
      <button type="button" @click="copyShareLink()"
              :disabled="question.trim().length < 3"
              class="text-xs px-2 py-1 rounded border border-gray-800 hover:border-cyan-700 disabled:border-gray-900 disabled:text-gray-700 transition">
        <span x-show="!shareLinkCopied">copy link</span>
        <span x-show="shareLinkCopied" class="text-emerald-400">copied ✓</span>
      </button>
      <span class="text-xs text-gray-500 ml-auto" x-show="hasResult"
            x-text="`${(elapsedMs/1000).toFixed(1)}s`"></span>
    </div>
  </form>
  <div x-show="error" class="mt-3 text-xs text-red-400" x-text="error"></div>
  <pre x-show="resultText"
       class="mt-4 text-sm whitespace-pre-wrap break-words border border-gray-800 rounded p-3 bg-gray-950/50 text-gray-200 leading-relaxed"
       x-text="resultText"></pre>
</section>

<script>
  function fanOutForm(initial) {
    return {
      projects: initial.projects, hosts: initial.hosts,
      selected: [], question: '', maxConcurrency: 5, maxTurns: 3,
      host: 'local',
      resultText: '', error: '', loading: false, hasResult: false, elapsedMs: 0,
      shareLinkCopied: false,
      _abortController: null,

      selectAll() { this.selected = [...this.projects]; this.persistToUrl(); },
      selectNone() { this.selected = []; this.persistToUrl(); },

      // v3.0.0a9: URL state encoding so an operator can copy/share a
      // pre-filled fan-out form. Read on mount; write on submit + on
      // selectAll/None. Avoids per-keystroke history pollution.
      restoreFromUrl() {
        const p = new URLSearchParams(window.location.search);
        const q = p.get('q'); if (q) this.question = q;
        const h = p.get('host'); if (h && this.hosts.includes(h)) this.host = h;
        const c = parseInt(p.get('concurrency') || '', 10);
        if (!isNaN(c) && c >= 1 && c <= 10) this.maxConcurrency = c;
        const t = parseInt(p.get('turns') || '', 10);
        if (!isNaN(t) && t >= 1 && t <= 10) this.maxTurns = t;
        const sel = p.get('targets');
        if (sel) {
          const want = new Set(sel.split(','));
          this.selected = this.projects.filter(x => want.has(x));
        }
      },

      persistToUrl() {
        const p = new URLSearchParams();
        if (this.question.trim()) p.set('q', this.question.trim());
        if (this.host && this.host !== 'local') p.set('host', this.host);
        if (this.maxConcurrency !== 5) p.set('concurrency', String(this.maxConcurrency));
        if (this.maxTurns !== 3) p.set('turns', String(this.maxTurns));
        if (this.selected.length > 0 && this.selected.length !== this.projects.length) {
          p.set('targets', this.selected.join(','));
        }
        const qs = p.toString();
        const url = qs ? `${window.location.pathname}?${qs}` : window.location.pathname;
        window.history.replaceState(null, '', url);
      },

      async run() {
        if (this.question.trim().length < 3 || this.selected.length === 0) return;
        this.persistToUrl();
        this.resultText = ''; this.error = ''; this.hasResult = false;
        this.loading = true; this.elapsedMs = 0;
        const t0 = performance.now();
        const controller = new AbortController();
        this._abortController = controller;
        try {
          const args = {
            question: this.question,
            project_filter: this.selected.join(','),
            max_concurrency: this.maxConcurrency,
            max_turns: this.maxTurns,
          };
          if (this.host && this.host !== 'local') args.host_filter = this.host;
          const r = await hmFetch('/mcp/harbormaster', {
            method: 'POST', signal: controller.signal,
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
              method: 'tools/call',
              params: { name: 'fan_out_ask', arguments: args },
            }),
          });
          if (!r.ok) throw new Error('HTTP ' + r.status);
          const body = await r.json();
          // fan_out_ask returns aggregated text in result.content[0].text
          const text = body?.result?.content?.[0]?.text;
          this.resultText = text || JSON.stringify(body, null, 2);
          this.hasResult = true;
        } catch (e) {
          if (e.name !== 'AbortError') this.error = e.message;
        } finally {
          this.loading = false;
          this.elapsedMs = performance.now() - t0;
          this._abortController = null;
        }
      },

      abort() { if (this._abortController) this._abortController.abort(); },

      // v4.0.0a2: copy a shareable link to the operator's clipboard.
      // Persists the current form state to URL first, then copies.
      // Falls back to a console message if clipboard API is unavailable
      // (older browsers, file:// origins).
      async copyShareLink() {
        this.persistToUrl();
        const url = window.location.href;
        try {
          if (navigator.clipboard && navigator.clipboard.writeText) {
            await navigator.clipboard.writeText(url);
          } else {
            console.warn('clipboard API unavailable; URL: ' + url);
          }
          this.shareLinkCopied = true;
          setTimeout(() => { this.shareLinkCopied = false; }, 2000);
        } catch (e) {
          console.warn('copy failed: ' + e.message);
        }
      },
    };
  }
</script>

{% endblock %}