{% extends "base.html" %}
{% block title %}库存看板{% endblock %}
{% block content %}
<div class="stats">
  <div class="stat"><div class="num">{{ rows|length }}</div><div class="lbl">物料种类</div></div>
  <div class="stat warn"><div class="num">{{ low }}</div><div class="lbl">低于安全库存</div></div>
  <div class="stat danger"><div class="num">{{ negative }}</div><div class="lbl">库存为负(缺料)</div></div>
</div>

<div class="scope-banner">
  {% if current_factory %}当前范围：<b>{{ current_factory.code }} · {{ current_factory.name }}</b> · 仅统计该工厂库存{% else %}当前范围：<b>全部工厂（汇总）</b> · 顶栏可切换具体工厂{% endif %}
</div>

<div class="tabs">
  <button class="tab active" type="button" onclick="showTab('mat', this)">📦 库存预警</button>
  {% if can_bom %}<button class="tab" type="button" onclick="showTab('bom', this)">🔧 BOM 物料齐套</button>{% endif %}
</div>

<!-- 标签一: 全部物料库存 -->
<div id="tab-mat">
  <table class="tbl">
    <thead>
      <tr><th>物料编号</th><th>型号 / 规格</th><th>单位</th><th>在库</th><th>安全库存</th><th>状态</th></tr>
    </thead>
    <tbody>
      {% for r in rows %}
      <tr class="row-{{ r.status }}">
        <td>{{ r.m.part_number }}</td>
        <td>{{ r.m.manufacturer or '-' }}</td>
        <td>{{ r.m.unit }}</td>
        <td class="num">{{ '%.2f'|format(r.stock) }}</td>
        <td class="num">{{ '%.2f'|format(r.m.safety_stock or 0) }}</td>
        <td>
          {% if r.status=='danger' %}<span class="badge danger">缺料</span>
          {% elif r.status=='warn' %}<span class="badge warn">偏低</span>
          {% else %}<span class="badge ok">正常</span>{% endif %}
        </td>
      </tr>
      {% else %}
      <tr><td colspan="6" class="muted">暂无物料, 请先到"物料"页面添加</td></tr>
      {% endfor %}
    </tbody>
  </table>
</div>

{% if can_bom %}
<!-- 标签二: BOM 物料齐套看板 -->
<div id="tab-bom" style="display:none">
  {% if bom_board %}
  <div class="bom-filter">
    <label for="bomSelect">选择 BOM</label>
    <select id="bomSelect" onchange="filterBom()">
      <option value="all">全部 BOM（总览）</option>
      {% for bb in bom_board %}
      <option value="{{ bb.b.id }}">{{ bb.b.code }}{% if bb.b.name %} · {{ bb.b.name }}{% endif %}</option>
      {% endfor %}
    </select>
    <span class="muted" id="bomCount"></span>
  </div>

  <div class="sim-bar">
    <label for="simQty">模拟需求量</label>
    <input id="simQty" type="number" min="1" step="1" placeholder="如 1000" />
    <span class="muted">套 / PCS（该 BOM 计划生产数量）</span>
    <button type="button" class="btn primary" onclick="simulateBom()">▶ 模拟齐套</button>
    <button type="button" class="btn" onclick="resetSim()">重置</button>
    <span class="muted" id="simHint"></span>
  </div>

  {% for bb in bom_board %}
  <div class="card" data-bid="{{ bb.b.id }}" style="margin-bottom:16px">
    <div class="card-head">
      <strong>{{ bb.b.code }}</strong>
      <span class="muted">{{ bb.b.name or '' }}</span>
      {% if bb.status=='danger' %}<span class="badge danger">缺料</span>
      {% elif bb.status=='warn' %}<span class="badge warn">部分偏低</span>
      {% else %}<span class="badge ok">齐套</span>{% endif %}
      <span class="badge sim-badge" id="simBadge-{{ bb.b.id }}" style="display:none"></span>
    </div>
    <table class="tbl" style="box-shadow:none; margin:0">
      <thead>
        <tr>
          <th>物料编号</th><th>型号 / 规格</th><th>单位</th><th>单套用量</th><th>当前在库</th><th>状态</th>
          <th class="sim-col" style="display:none">需求用量</th><th class="sim-col" style="display:none">缺口</th>
        </tr>
      </thead>
      <tbody>
        {% for it in bb.parts %}
        <tr class="row-{{ it.status }}" data-qty="{{ it.qty }}" data-stock="{{ it.stock }}">
          <td><a href="{{ url_for('material_detail', mid=it.m.id) }}">{{ it.m.part_number }}</a></td>
          <td>{{ it.m.manufacturer or '-' }}</td>
          <td>{{ it.m.unit }}</td>
          <td class="num">{{ '%.4g'|format(it.qty) }}</td>
          <td class="num">{{ '%.2f'|format(it.stock) }}</td>
          <td>
            {% if it.status=='danger' %}<span class="badge danger">缺料</span>
            {% elif it.status=='warn' %}<span class="badge warn">偏低</span>
            {% else %}<span class="badge ok">正常</span>{% endif %}
          </td>
          <td class="sim-col num" style="display:none"></td>
          <td class="sim-col num" style="display:none"></td>
        </tr>
        {% else %}
        <tr><td colspan="8" class="muted">该 BOM 暂无组成物料</td></tr>
        {% endfor %}
      </tbody>
    </table>
  </div>
  {% endfor %}
  {% else %}
  <p class="muted">暂无 BOM，请先到 BOM 页面导入或新建。</p>
  {% endif %}
</div>
{% endif %}

<script>
function showTab(id, btn){
  document.getElementById('tab-mat').style.display = id==='mat' ? 'block' : 'none';
  document.getElementById('tab-bom').style.display = id==='bom' ? 'block' : 'none';
  document.querySelectorAll('.tabs .tab').forEach(b=>b.classList.remove('active'));
  btn.classList.add('active');
  if(id==='bom') filterBom();
}
function filterBom(){
  var sel = document.getElementById('bomSelect');
  if(!sel) return;
  var v = sel.value;
  var cards = document.querySelectorAll('#tab-bom [data-bid]');
  cards.forEach(function(c){
    c.style.display = (v==='all' || c.getAttribute('data-bid')===v) ? 'block' : 'none';
  });
  var cnt = document.getElementById('bomCount');
  if(cnt) cnt.textContent = (v==='all') ? ('共 ' + cards.length + ' 棵 BOM') : ('已选 1 / ' + cards.length + ' 棵');
}
function fmtNum(n){
  // 去掉多余小数, 保留至多3位
  var r = Math.round(n*1000)/1000;
  return r.toLocaleString('zh-CN', {maximumFractionDigits:3});
}
function simulateBom(){
  var qEl = document.getElementById('simQty');
  var q = parseFloat(qEl.value);
  if(!q || q <= 0){ alert('请输入有效的模拟需求量（正整数）'); return; }
  var sel = document.getElementById('bomSelect');
  var v = sel ? sel.value : 'all';
  var cards = (v==='all')
      ? document.querySelectorAll('#tab-bom .card[data-bid]')
      : document.querySelectorAll('#tab-bom .card[data-bid="'+v+'"]');
  var anyShort = false;
  cards.forEach(function(card){
    var shortage = 0, total = 0;
    card.querySelectorAll('tbody tr[data-qty]').forEach(function(tr){
      var qpu = parseFloat(tr.getAttribute('data-qty'));
      var stock = parseFloat(tr.getAttribute('data-stock'));
      var need = qpu * q;
      var gap = need - stock;
      total++;
      if(gap > 0){ shortage++; tr.classList.add('row-sim-danger'); }
      else { tr.classList.remove('row-sim-danger'); }
      var cols = tr.querySelectorAll('.sim-col');
      cols[0].textContent = fmtNum(need);
      cols[1].textContent = gap > 0 ? ('缺 ' + fmtNum(gap)) : '充足';
      cols[0].style.display = '';
      cols[1].style.display = '';
    });
    card.querySelectorAll('th.sim-col').forEach(function(th){ th.style.display=''; });
    var badge = document.getElementById('simBadge-'+card.getAttribute('data-bid'));
    if(badge){
      badge.style.display = '';
      if(shortage>0){ badge.className='badge sim-badge danger'; badge.textContent='模拟缺料: 缺 '+shortage+'/'+total+' 种'; anyShort=true; }
      else { badge.className='badge sim-badge ok'; badge.textContent='模拟齐套: '+total+' 种充足'; }
    }
  });
  var hint = document.getElementById('simHint');
  if(hint){
    if(cards.length>1) hint.textContent = anyShort ? ('共模拟 '+cards.length+' 棵 BOM，存在缺料') : ('共模拟 '+cards.length+' 棵 BOM，全部齐套');
    else if(cards.length===1) hint.textContent = anyShort ? '该 BOM 模拟缺料' : '该 BOM 模拟齐套';
  }
}
function resetSim(){
  document.querySelectorAll('#tab-bom .sim-col').forEach(function(e){ e.style.display='none'; });
  document.querySelectorAll('#tab-bom tbody tr').forEach(function(tr){ tr.classList.remove('row-sim-danger'); });
  document.querySelectorAll('#tab-bom .sim-badge').forEach(function(b){ b.style.display='none'; });
  var q = document.getElementById('simQty'); if(q) q.value='';
  var h = document.getElementById('simHint'); if(h) h.textContent='';
}
filterBom();
</script>
{% endblock %}