{# v2.1.0a5: "Delegate task" form on the project detail page.
   Mirrors _partials/ask_form.html but adds the `deliverable` field
   that delegate_task requires. Streams via the same SSE path.
   Expects: project_name (str), host (str).
#}
<section x-data="delegateForm({
           project: {{ project_name | tojson }},
           host: {{ host | tojson }},
         })"
         class="mb-6 border border-gray-800 rounded-lg p-4 bg-gray-900/40">
  <header class="mb-3 flex items-baseline justify-between gap-2 flex-wrap">
    <h3 class="text-base font-bold text-gray-300">
      Delegate task to <span class="text-cyan-400" x-text="project"></span>
    </h3>
    <span class="text-xs text-gray-500">
      v1 fails closed for writes — read-only delegation
    </span>
  </header>
  <form @submit.prevent="run()" class="space-y-2">
    <textarea x-model="task" rows="3" required minlength="3"
              :disabled="loading"
              placeholder="task description — what should the subagent do?"
              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>
    <textarea x-model="deliverable" rows="2" required minlength="3"
              :disabled="loading"
              placeholder="deliverable — what should the response look like? (e.g. markdown summary, bullet list)"
              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 class="flex flex-wrap items-center gap-3 text-xs text-gray-400">
      <span class="text-gray-600" x-show="loading">streaming…</span>
      <span class="text-gray-500 ml-auto" x-show="!loading && hasResult"
            x-text="`${chunks} chunks · ${(elapsedMs/1000).toFixed(1)}s`"></span>
      <button type="submit"
              :disabled="loading || task.trim().length < 3 || deliverable.trim().length < 3"
              class="bg-cyan-700 hover:bg-cyan-600 disabled:bg-gray-800 disabled:text-gray-500 text-white font-bold px-4 py-1.5 rounded transition">
        <span x-show="!loading">Delegate</span>
        <span x-show="loading">…</span>
      </button>
      <button type="button" x-show="loading" @click="abort()"
              class="text-amber-400 hover:text-amber-300 underline">stop</button>
    </div>
  </form>
  <div x-show="error" class="mt-3 text-xs text-red-400" x-text="error"></div>
  <pre x-show="streamText"
       class="mt-3 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="streamText"></pre>
</section>

<script>
  function delegateForm(initial) {
    return {
      project: initial.project, host: initial.host,
      task: '', deliverable: '',
      streamText: '', chunks: 0, error: '',
      loading: false, hasResult: false, elapsedMs: 0,
      _abortController: null,

      async run() {
        if (this.task.trim().length < 3 || this.deliverable.trim().length < 3) return;
        this.streamText = ''; this.chunks = 0; 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 = {
            name: this.project, task: this.task, deliverable: this.deliverable,
          };
          if (this.host && this.host !== 'local') args.host = this.host;
          const r = await fetch('/mcp/harbormaster', {
            method: 'POST', signal: controller.signal,
            headers: {
              'Content-Type': 'application/json',
              'Accept': 'text/event-stream',
            },
            body: JSON.stringify({
              method: 'tools/call',
              params: { name: 'delegate_task', arguments: args },
            }),
          });
          if (!r.ok) throw new Error('HTTP ' + r.status);
          await this._consumeSseStream(r);
          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(); },

      async _consumeSseStream(response) {
        const reader = response.body.getReader();
        const decoder = new TextDecoder();
        let buffer = '';
        for (;;) {
          const { done, value } = await reader.read();
          if (done) break;
          buffer += decoder.decode(value, { stream: true });
          const events = buffer.split('\n\n');
          buffer = events.pop() || '';
          for (const block of events) {
            const ev = this._parseEvent(block);
            if (ev.event === 'chunk') {
              try {
                const p = JSON.parse(ev.data);
                this.streamText += (p.delta ?? p.chunk ?? '');
                this.chunks += 1;
              } catch (_) { /* drop malformed chunk */ }
            } else if (ev.event === 'result') {
              try {
                const p = JSON.parse(ev.data);
                if (p.content && p.content[0] && p.content[0].text && !this.chunks) {
                  this.streamText = p.content[0].text;
                }
              } catch (_) { /* drop malformed result */ }
            } else if (ev.event === 'error') {
              try {
                const p = JSON.parse(ev.data);
                this.error = p.detail || p.message || ev.data;
              } catch (_) { this.error = ev.data; }
            }
          }
        }
      },

      _parseEvent(block) {
        let event = 'message';
        const dataParts = [];
        for (const line of block.split('\n')) {
          if (line.startsWith('event:')) event = line.slice(6).trim();
          else if (line.startsWith('data:')) dataParts.push(line.slice(5).trimStart());
        }
        return { event, data: dataParts.join('\n') };
      },
    };
  }
</script>