{% extends "_base.html" %}
{% block content %}
<div x-data="datasetWizard()" x-init="init()">
  <span class="page-eyebrow">Workflow · dataset</span>
  <h1 class="page-title">Build a dataset</h1>
  <p class="page-lead">
    Thirteen templates to turn pairs, docs, code, seeds, and HF datasets into JSONL the
    fine-tune workflow can consume — including DPO preference pairs. The
    LLM-driven templates call this Lab's API.
  </p>

  {# Step 1: pick template #}
  <div x-show="step === 0">
    <h2>Pick a template</h2>
    <div style="display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;">
      <template x-for="t in templates" :key="t.id">
        <div class="card" style="margin: 0; cursor: pointer;"
             @click="selectTemplate(t)">
          <div style="display: flex; gap: 8px; align-items: center;">
            <h3 style="margin: 0;" x-text="t.label"></h3>
            <template x-if="t.needs_llm"><span class="pill pill-warn">uses LLM</span></template>
            <span class="pill pill-idle" x-text="t.output_format"></span>
          </div>
          <p style="color: var(--mute); font-size: 13px; margin: 6px 0 0;" x-text="t.description"></p>
        </div>
      </template>
    </div>
  </div>

  {# Step 2: fill inputs #}
  <div class="card" x-show="step === 1">
    <h2 x-text="selected?.label"></h2>
    <p style="color: var(--mute); font-size: 13px;" x-text="selected?.description"></p>
    <template x-for="f in (selected?.fields || [])" :key="f.name">
      <div class="form-row">
        <label x-text="f.label + (f.required ? ' *' : '')"></label>
        <template x-if="f.type === 'textarea'">
          <textarea x-model="inputs[f.name]" rows="6" :placeholder="f.hint || ''"></textarea>
        </template>
        <template x-if="f.type === 'text'">
          <input type="text" x-model="inputs[f.name]" :placeholder="f.hint || ''">
        </template>
        <template x-if="f.type === 'number'">
          <input type="number" x-model.number="inputs[f.name]" :value="f.default">
        </template>
      </div>
    </template>
    <div style="display: flex; gap: 8px;">
      <button class="btn btn-ghost" @click="step = 0; selected = null;">Back</button>
      <button class="btn" @click="submit()">Generate</button>
    </div>
  </div>

  {# Step 3: run #}
  <div class="card" x-show="step === 2">
    <h2>Generating</h2>
    <div style="margin-bottom: 12px;">
      <div style="height: 8px; background: var(--paper-3); border-radius: 4px; overflow: hidden;">
        <div style="height: 100%; background: var(--accent); transition: width 0.4s;"
             :style="'width: ' + Math.round((progress || 0) * 100) + '%;'"></div>
      </div>
      <div style="display: flex; justify-content: space-between; font-size: 12px; color: var(--mute); margin-top: 6px;">
        <span x-text="message || 'Starting…'"></span>
        <span x-text="Math.round((progress || 0) * 100) + '%'"></span>
      </div>
    </div>
    <pre x-ref="logEl" style="max-height: 280px; overflow-y: auto; font-size: 11.5px;"
         x-text="logLines.slice(-200).join('\n')"></pre>
  </div>

  {# Step 4: save / push #}
  <div class="card" x-show="step === 3">
    <h2 style="margin-top: 0;">Done</h2>
    <p>Dataset written to:</p>
    <pre x-text="outputDir"></pre>
    <p style="color: var(--mute); font-size: 13px;">
      Point Fine-tune → Dataset at <code x-text="outputDir"></code> to use it.
    </p>

    <h3>Push to Hugging Face as a dataset</h3>
    <div class="form-row"><label>Repository (e.g. username/my-dataset)</label>
      <input type="text" x-model="repoId" placeholder="your-username/my-dataset"></div>
    <div class="form-row">
      <label style="display: inline-flex; gap: 6px;">
        <input type="checkbox" x-model="repoPrivate"> Private
      </label>
    </div>
    <div class="form-row"><label>Lab password</label>
      <input type="password" x-model="pushPassword"></div>

    <template x-if="pushResult && pushResult.ok">
      <div class="flash flash-ok">Pushed: <a :href="pushResult.url" target="_blank" x-text="pushResult.url"></a></div>
    </template>
    <template x-if="pushResult && !pushResult.ok">
      <div class="flash flash-err" x-text="pushResult.error"></div>
    </template>

    <div style="display: flex; gap: 8px;">
      <button class="btn" :disabled="pushing || !repoId.trim() || !pushPassword" @click="push()">
        <span x-text="pushing ? 'Pushing…' : 'Push to HF'"></span>
      </button>
      <a class="btn btn-ghost" href="{{ url_for('dataset.dataset_page') }}">Build another</a>
    </div>
  </div>
</div>

<script>
function datasetWizard() {
  return {
    step: 0,
    templates: {{ templates | tojson }},
    selected: null,
    inputs: {},

    jobId: null,
    progress: 0, message: '',
    logLines: [],
    outputDir: '',

    repoId: '', repoPrivate: true, pushPassword: '',
    pushing: false, pushResult: null,

    init() {
      const params = new URLSearchParams(window.location.search);
      const jid = params.get('job_id');
      if (jid) {
        this.jobId = jid;
        this.step = 2;
        this.attachStream();
      }
    },

    selectTemplate(t) {
      this.selected = t;
      this.inputs = {};
      for (const f of (t.fields || [])) {
        if (f.default !== undefined) this.inputs[f.name] = f.default;
      }
      this.step = 1;
    },

    async submit() {
      const r = await fetch('/api/dataset/submit', {
        method: 'POST',
        headers: {'Content-Type': 'application/json'},
        body: JSON.stringify({
          template_id: this.selected.id,
          inputs: this.inputs,
        }),
        credentials: 'same-origin',
      });
      const data = await r.json();
      if (!data.ok) { alert(data.error); return; }
      this.jobId = data.job_id;
      this.outputDir = data.output_dir;
      this.step = 2;
      history.replaceState({}, '', '?job_id=' + this.jobId);
      this.attachStream();
    },

    attachStream() {
      if (!this.jobId) return;
      const es = new EventSource('/api/jobs/' + this.jobId + '/stream');
      es.onmessage = (ev) => {
        try {
          const e = JSON.parse(ev.data);
          if (e.type === 'log') {
            this.logLines.push(e.line);
          } else if (e.type === 'stage') {
            this.progress = e.progress || this.progress;
            this.message = e.message || this.message;
            if (e.stage === 'done') {
              this.outputDir = e.output_dir || this.outputDir;
              this.progress = 1;
              this.step = 3;
              es.close();
            }
          } else if (e.type === 'failed') {
            this.message = 'Failed: ' + (e.error || 'unknown');
            es.close();
          }
        } catch (err) {}
      };
      es.addEventListener('end', () => es.close());
    },

    async push() {
      this.pushing = true; this.pushResult = null;
      const r = await fetch('/api/dataset/push', {
        method: 'POST',
        headers: {'Content-Type': 'application/json'},
        body: JSON.stringify({
          job_id: this.jobId, repo_id: this.repoId.trim(),
          private: this.repoPrivate, password: this.pushPassword,
        }),
        credentials: 'same-origin',
      });
      this.pushResult = await r.json();
      this.pushing = false;
    },
  };
}
</script>
{% endblock %}