{% extends "base.html" %}
{% block title %}{{ battery.label }} — Battery Tracker{% endblock %}

{% block content %}
<h1>{{ battery.label }}</h1>

{% macro meta_row(label, value) %}
{% if value %}
<tr>
  <td style="padding:0.3rem 1rem 0.3rem 0;font-weight:600;color:#64748b;border:none;">{{ label }}</td>
  <td style="border:none;">{{ value }}</td>
</tr>
{% endif %}
{% endmacro %}

<div class="card">
  <table style="width:auto;border:none;">
    <tr>
      <td style="padding:0.3rem 1rem 0.3rem 0;font-weight:600;color:#64748b;border:none;">Label</td>
      <td style="border:none;">{{ battery.label }}</td>
    </tr>
    <tr>
      <td style="padding:0.3rem 1rem 0.3rem 0;font-weight:600;color:#64748b;border:none;">Brand</td>
      <td style="border:none;">{{ battery.brand }}</td>
    </tr>
    <tr>
      <td style="padding:0.3rem 1rem 0.3rem 0;font-weight:600;color:#64748b;border:none;">Status</td>
      <td style="border:none;"><span class="badge badge-{{ battery.status }}">{{ battery.status|capitalize }}</span></td>
    </tr>
    <tr>
      <td style="padding:0.3rem 1rem 0.3rem 0;font-weight:600;color:#64748b;border:none;">Device</td>
      <td style="border:none;">
        {% if battery.device %}
          <a href="{{ url_for('device_detail', device_id=battery.device.id) }}">{{ battery.device.name }}</a>
        {% else %}
          <span class="text-muted">None</span>
        {% endif %}
      </td>
    </tr>
    {{ meta_row("Size", battery.size) }}
    {{ meta_row("Chemistry", battery.chemistry) }}
    {% if battery.capacity_mah %}
    <tr>
      <td style="padding:0.3rem 1rem 0.3rem 0;font-weight:600;color:#64748b;border:none;">Capacity</td>
      <td style="border:none;">
        {{ battery.capacity_mah }} mAh
        {% if battery.tested_capacity_mah %}
          {% set pct = (battery.tested_capacity_mah / battery.capacity_mah * 100)|round|int %}
          {% if pct >= 80 %}{% set health_class = "health-good" %}
          {% elif pct >= 60 %}{% set health_class = "health-warn" %}
          {% else %}{% set health_class = "health-bad" %}
          {% endif %}
          &rarr; tested <strong class="{{ health_class }}">{{ battery.tested_capacity_mah }} mAh ({{ pct }}%)</strong>
          {% if battery.tested_date %}<span class="text-muted">on {{ battery.tested_date }}</span>{% endif %}
        {% endif %}
      </td>
    </tr>
    {% elif battery.tested_capacity_mah %}
    <tr>
      <td style="padding:0.3rem 1rem 0.3rem 0;font-weight:600;color:#64748b;border:none;">Tested Capacity</td>
      <td style="border:none;">
        {{ battery.tested_capacity_mah }} mAh
        {% if battery.tested_date %}<span class="text-muted">on {{ battery.tested_date }}</span>{% endif %}
      </td>
    </tr>
    {% endif %}
    {{ meta_row("Charge Cycles", battery.charge_cycles) }}
    {{ meta_row("Purchase Date", battery.purchase_date) }}
    {{ meta_row("Storage", battery.storage_location) }}
    {% if battery.notes %}
    <tr>
      <td style="padding:0.3rem 1rem 0.3rem 0;font-weight:600;color:#64748b;border:none;">Notes</td>
      <td style="border:none;">{{ battery.notes }}</td>
    </tr>
    {% endif %}
  </table>
</div>

<!-- Capacity History -->
<div class="card">
  <h2>Capacity History</h2>

  {% if capacity_tests|length >= 2 %}
  <canvas id="capacity-chart"
          style="width:100%;max-width:500px;height:140px;display:block;margin-bottom:1rem;"
          width="500" height="140"></canvas>
  {% endif %}

  {% if capacity_tests %}
  <div class="table-wrap">
    <table class="responsive-table">
      <thead>
        <tr>
          <th>Date</th>
          <th>Capacity</th>
          {% if battery.capacity_mah %}<th>Health</th>{% endif %}
          <th>Notes</th>
          <th></th>
        </tr>
      </thead>
      <tbody>
        {% for t in capacity_tests|sort(attribute='tested_date', reverse=True) %}
        <tr>
          <td data-label="Date">{{ t.tested_date }}</td>
          <td data-label="Capacity">{{ t.tested_capacity_mah }} mAh</td>
          {% if battery.capacity_mah %}
            {% set pct = (t.tested_capacity_mah / battery.capacity_mah * 100)|round|int %}
            {% if pct >= 80 %}{% set hc = "health-good" %}
            {% elif pct >= 60 %}{% set hc = "health-warn" %}
            {% else %}{% set hc = "health-bad" %}{% endif %}
            <td data-label="Health"><span class="{{ hc }}">{{ pct }}%</span></td>
          {% endif %}
          <td data-label="Notes" class="text-muted">{{ t.notes or '—' }}</td>
          <td data-label="">
            <form class="inline" method="post"
                  action="{{ url_for('battery_capacity_test_delete', battery_id=battery.id, test_id=t.id) }}"
                  onsubmit="return confirm('Delete this test record?')">
              <button class="btn btn-sm btn-danger" type="submit">Delete</button>
            </form>
          </td>
        </tr>
        {% endfor %}
      </tbody>
    </table>
  </div>
  {% else %}
  <p class="text-muted" style="margin-bottom:0.75rem;">No test records yet.</p>
  {% endif %}

  <h3 style="font-size:1rem;margin:1rem 0 0.5rem;color:var(--text-h2);">Add Test Record</h3>
  <form method="post" action="{{ url_for('battery_capacity_test_add', battery_id=battery.id) }}"
        style="display:flex;gap:0.5rem;flex-wrap:wrap;align-items:flex-end;">
    <div class="form-group" style="margin:0;flex:1;min-width:120px;">
      <label>Capacity (mAh)</label>
      <input type="number" name="tested_capacity_mah" min="1" placeholder="e.g. 1850" required>
    </div>
    <div class="form-group" style="margin:0;flex:1;min-width:140px;">
      <label>Date</label>
      <input type="date" name="tested_date" required>
    </div>
    <div class="form-group" style="margin:0;flex:2;min-width:160px;">
      <label>Notes (optional)</label>
      <input type="text" name="notes" placeholder="e.g. after 50 cycles">
    </div>
    <div style="padding-bottom:1rem;">
      <button class="btn btn-primary" type="submit">Add</button>
    </div>
  </form>
</div>

<!-- Charge History -->
<div class="card">
  <h2>Charge History</h2>

  {% if charge_logs %}
  <div class="table-wrap">
    <table class="responsive-table">
      <thead>
        <tr>
          <th>Date</th>
          <th>+Cycle</th>
          <th>Notes</th>
          <th></th>
        </tr>
      </thead>
      <tbody>
        {% for log in charge_logs %}
        <tr>
          <td data-label="Date">{{ log.charged_date }}</td>
          <td data-label="+Cycle">{{ '✓' if log.increment_cycles else '—' }}</td>
          <td data-label="Notes" class="text-muted">{{ log.notes or '—' }}</td>
          <td data-label="">
            <form class="inline" method="post"
                  action="{{ url_for('battery_charge_log_delete', battery_id=battery.id, log_id=log.id) }}"
                  onsubmit="return confirm('Delete this charge log entry?')">
              <button class="btn btn-sm btn-danger" type="submit">Delete</button>
            </form>
          </td>
        </tr>
        {% endfor %}
      </tbody>
    </table>
  </div>
  {% else %}
  <p class="text-muted" style="margin-bottom:0.75rem;">No charge log entries yet.</p>
  {% endif %}

  <h3 style="font-size:1rem;margin:1rem 0 0.5rem;color:var(--text-h2);">Add Charge Entry</h3>
  <form method="post" action="{{ url_for('battery_charge_log_add', battery_id=battery.id) }}"
        style="display:flex;gap:0.5rem;flex-wrap:wrap;align-items:flex-end;">
    <div class="form-group" style="margin:0;flex:1;min-width:140px;">
      <label>Date</label>
      <input type="date" name="charged_date" required>
    </div>
    <div class="form-group" style="margin:0;align-self:flex-end;padding-bottom:1rem;">
      <label style="display:flex;align-items:center;gap:0.4rem;font-weight:normal;cursor:pointer;">
        <input type="checkbox" name="increment_cycles" value="1" checked>
        Increment charge cycles
      </label>
    </div>
    <div class="form-group" style="margin:0;flex:2;min-width:160px;">
      <label>Notes (optional)</label>
      <input type="text" name="notes" placeholder="e.g. trickle charge overnight">
    </div>
    <div style="padding-bottom:1rem;">
      <button class="btn btn-primary" type="submit">Add</button>
    </div>
  </form>
</div>

<!-- Edit Details -->
<div class="card">
  <h2>Edit Details</h2>
  <form method="post" action="{{ url_for('battery_edit_details', battery_id=battery.id) }}">

    <div class="form-grid-2col" style="display:grid;grid-template-columns:1fr 1fr;gap:0 1rem;">

      <div class="form-group">
        <label>Size</label>
        <select id="size-select" onchange="metaSelectChanged(this,'size')">
          <option value="">— none —</option>
          {% for opt in ['AA','AAA','C','D','9V','18650','21700','14500','26650','CR2032','CR123A'] %}
          <option value="{{ opt }}" {% if battery.size == opt %}selected{% endif %}>{{ opt }}</option>
          {% endfor %}
          <option value="__new__" {% if battery.size and battery.size not in ['AA','AAA','C','D','9V','18650','21700','14500','26650','CR2032','CR123A'] %}selected{% endif %}>Other…</option>
        </select>
        <input type="text" id="size" name="size" value="{{ battery.size or '' }}"
               placeholder="Enter size"
               style="display:{% if battery.size and battery.size not in ['AA','AAA','C','D','9V','18650','21700','14500','26650','CR2032','CR123A'] %}''{% else %}none{% endif %};margin-top:0.4rem;">
      </div>

      <div class="form-group">
        <label>Chemistry</label>
        <select id="chemistry-select" onchange="metaSelectChanged(this,'chemistry')">
          <option value="">— none —</option>
          {% for opt in ['NiMH','Alkaline','Li-ion','LiFePO4','NiCd','Zinc-Carbon','Li-MnO2'] %}
          <option value="{{ opt }}" {% if battery.chemistry == opt %}selected{% endif %}>{{ opt }}</option>
          {% endfor %}
          <option value="__new__" {% if battery.chemistry and battery.chemistry not in ['NiMH','Alkaline','Li-ion','LiFePO4','NiCd','Zinc-Carbon','Li-MnO2'] %}selected{% endif %}>Other…</option>
        </select>
        <input type="text" id="chemistry" name="chemistry" value="{{ battery.chemistry or '' }}"
               placeholder="Enter chemistry"
               style="display:{% if battery.chemistry and battery.chemistry not in ['NiMH','Alkaline','Li-ion','LiFePO4','NiCd','Zinc-Carbon','Li-MnO2'] %}''{% else %}none{% endif %};margin-top:0.4rem;">
      </div>

      <div class="form-group">
        <label for="capacity_mah">Capacity (mAh)</label>
        <input type="number" id="capacity_mah" name="capacity_mah" min="0"
               value="{{ battery.capacity_mah or '' }}" placeholder="e.g. 2000">
      </div>

      <div class="form-group">
        <label for="charge_cycles">Charge Cycles</label>
        <input type="number" id="charge_cycles" name="charge_cycles" min="0"
               value="{{ battery.charge_cycles or '' }}" placeholder="e.g. 50">
      </div>

      <div class="form-group">
        <label for="purchase_date">Purchase Date</label>
        <input type="date" id="purchase_date" name="purchase_date"
               value="{{ battery.purchase_date or '' }}">
      </div>

    </div>

    <div class="form-group">
      <label>Storage Location</label>
      <select id="storage-select" onchange="metaSelectChanged(this,'storage_location')">
        <option value="">— none —</option>
        {% for loc in storage_locations|default([]) %}
        <option value="{{ loc }}" {% if battery.storage_location == loc %}selected{% endif %}>{{ loc }}</option>
        {% endfor %}
        <option value="__new__" {% if battery.storage_location and battery.storage_location not in storage_locations|default([]) %}selected{% endif %}>➕ New location…</option>
      </select>
      <input type="text" id="storage_location" name="storage_location"
             value="{{ battery.storage_location or '' }}"
             placeholder="e.g. Drawer 2, Toolbox, Shelf A"
             style="display:{% if battery.storage_location and battery.storage_location not in storage_locations|default([]) %}''{% else %}none{% endif %};margin-top:0.4rem;">
    </div>

    <div class="form-group">
      <label for="notes">Notes</label>
      <textarea id="notes" name="notes" placeholder="No notes yet…">{{ battery.notes or '' }}</textarea>
    </div>

    <button class="btn btn-primary" type="submit">Save Details</button>
  </form>
</div>

<!-- Actions -->
<div class="card">
  <h2>Actions</h2>
  <div class="form-actions">
    {% if battery.is_available() %}
      <a class="btn btn-primary" href="{{ url_for('battery_assign', battery_id=battery.id) }}">Assign to Device</a>
    {% endif %}

    {% if battery.is_installed() %}
      <form method="post" action="{{ url_for('battery_unassign', battery_id=battery.id) }}">
        <button class="btn btn-warning" type="submit">Unassign</button>
      </form>
    {% endif %}

    {% if not battery.is_retired() %}
      <form method="post" action="{{ url_for('battery_retire', battery_id=battery.id) }}">
        <button class="btn btn-secondary" type="submit">Retire Battery</button>
      </form>
    {% else %}
      <form method="post" action="{{ url_for('battery_unretire', battery_id=battery.id) }}">
        <button class="btn btn-secondary" type="submit">Unretire Battery</button>
      </form>
    {% endif %}

    <a class="btn btn-danger" href="{{ url_for('battery_delete', battery_id=battery.id) }}">Delete Battery</a>
  </div>
</div>

<a class="text-muted" href="{{ url_for('dashboard') }}">&larr; Back to Dashboard</a>

<script>
(function() {
  var canvas = document.getElementById('capacity-chart');
  if (!canvas) return;
  var tests  = {{ capacity_tests | map(attribute='tested_capacity_mah') | list | tojson }};
  var labels = {{ capacity_tests | map(attribute='tested_date') | list | tojson }};
  if (tests.length < 2) return;

  var s = getComputedStyle(document.documentElement);
  var lineColor = s.getPropertyValue('--link').trim()       || '#2563eb';
  var textColor = s.getPropertyValue('--text-muted').trim() || '#6b7280';
  var gridColor = s.getPropertyValue('--border').trim()     || '#e2e8f0';

  var dpr = window.devicePixelRatio || 1;
  var W = canvas.offsetWidth || 500, H = 140;
  canvas.width  = W * dpr; canvas.height = H * dpr;
  canvas.style.width = W + 'px'; canvas.style.height = H + 'px';

  var ctx = canvas.getContext('2d');
  ctx.scale(dpr, dpr);

  var PAD = {top: 12, right: 16, bottom: 28, left: 52};
  var cW = W - PAD.left - PAD.right;
  var cH = H - PAD.top  - PAD.bottom;

  var minV = Math.min.apply(null, tests), maxV = Math.max.apply(null, tests);
  var pad = (maxV - minV || 100) * 0.1;
  minV -= pad; maxV += pad;
  var range = maxV - minV;

  function xOf(i) { return PAD.left + (i / (tests.length - 1)) * cW; }
  function yOf(v) { return PAD.top  + cH - ((v - minV) / range) * cH; }

  // Horizontal grid lines
  ctx.lineWidth = 0.5;
  [0, 0.5, 1].forEach(function(t) {
    var y = PAD.top + cH * (1 - t);
    ctx.strokeStyle = gridColor;
    ctx.beginPath(); ctx.moveTo(PAD.left, y); ctx.lineTo(PAD.left + cW, y); ctx.stroke();
    ctx.fillStyle = textColor; ctx.font = '10px system-ui'; ctx.textAlign = 'right';
    ctx.fillText(Math.round(minV + t * range) + '', PAD.left - 4, y + 3);
  });

  // Line
  ctx.strokeStyle = lineColor; ctx.lineWidth = 2; ctx.lineJoin = 'round';
  ctx.beginPath();
  tests.forEach(function(v, i) {
    i === 0 ? ctx.moveTo(xOf(i), yOf(v)) : ctx.lineTo(xOf(i), yOf(v));
  });
  ctx.stroke();

  // Dots + date labels (first and last only)
  tests.forEach(function(v, i) {
    ctx.fillStyle = lineColor;
    ctx.beginPath(); ctx.arc(xOf(i), yOf(v), 3, 0, Math.PI * 2); ctx.fill();
    if (i === 0 || i === tests.length - 1) {
      ctx.fillStyle = textColor; ctx.font = '9px system-ui';
      ctx.textAlign = i === 0 ? 'left' : 'right';
      ctx.fillText(labels[i], xOf(i), H - 4);
    }
  });
}());

function metaSelectChanged(sel, inputId) {
  var input = document.getElementById(inputId);
  if (sel.value === '__new__') {
    input.style.display = '';
    input.value = '';
    input.focus();
  } else {
    input.style.display = 'none';
    input.value = sel.value;
  }
}
</script>
{% endblock %}