{% extends "base.html" %}
{% block title %}Szenarien – Finanzberatung{% endblock %}
{% block content %}
<h1>Szenarien</h1>

<section class="planning-section">
  {% for row in scenario_rows %}
  {% set sc = row.scenario %}
  <fieldset>
    <legend>{{ sc.name }}</legend>
    <p id="sc-row-{{ sc.id }}">
      {{ sc.description }}
      · Wiederkehrende Posten: {{ 'ja' if sc.include_recurring else 'nein' }}
      · Einmalposten: {{ 'ja' if sc.include_planned else 'nein' }}
      <button type="button" onclick="toggleEdit('sc', {{ sc.id }}, true)">Bearbeiten</button>
    </p>
    <div id="sc-edit-{{ sc.id }}" hidden>
      <form hx-ext="json-form" hx-patch="/api/scenarios/{{ sc.id }}" hx-swap="none"
            hx-on::after-request="if(event.detail.successful){window.location.reload()}">
        <label>Name <input type="text" name="name" value="{{ sc.name }}" required></label>
        <label>Beschreibung <input type="text" name="description" value="{{ sc.description }}"></label>
        <label><input type="checkbox" name="include_recurring" data-type="bool" {% if sc.include_recurring %}checked{% endif %}> Wiederkehrende Posten einschließen</label>
        <label><input type="checkbox" name="include_planned" data-type="bool" {% if sc.include_planned %}checked{% endif %}> Einmalposten einschließen</label>
        <button type="submit">Speichern</button>
        <button type="button" onclick="toggleEdit('sc', {{ sc.id }}, false)">Abbrechen</button>
      </form>
    </div>

    <details>
      <summary>Kredite zuordnen</summary>
      {% for l in loans %}
      <label class="inline-form">
        <input type="checkbox" {% if l.id in row.assigned_loan_ids %}checked{% endif %}
               onchange="toggleScenarioLoan({{ sc.id }}, {{ l.id }}, this.checked, this)">
        {{ l.name }}
      </label>
      {% else %}
      <p>Keine Kredite vorhanden.</p>
      {% endfor %}
    </details>

    <h3>Einträge</h3>
    <table>
      <thead>
        <tr><th>Was</th><th>Art</th><th>Wert/Betrag</th><th>Datum</th><th></th></tr>
      </thead>
      <tbody>
        {% for m in row.modifiers %}
        <tr id="mod-row-{{ m.id }}">
          <td>
            {% if m.target_type == "category" %}Kategorie: {{ category_names.get(m.target_id, m.target_id) }}
            {% else %}Posten: {{ recurring_names.get(m.target_id, m.target_id) }}{% endif %}
          </td>
          <td>{{ m.kind|de_label }}</td>
          <td>{% if m.kind in ('percent', 'absolute') %}{{ m.value|eur }}{% else %}–{% endif %}</td>
          <td>{% if m.kind == 'ende' %}{{ m.end_date.strftime('%d.%m.%Y') if m.end_date else '–' }}{% else %}–{% endif %}</td>
          <td>
            <button type="button" onclick="toggleEdit('mod', {{ m.id }}, true)">Bearbeiten</button>
            <form class="inline-form" hx-delete="/api/scenarios/{{ sc.id }}/modifiers/{{ m.id }}" hx-swap="none"
                  hx-on::after-request="if(event.detail.successful){window.location.reload()}">
              <button type="submit">Löschen</button>
            </form>
          </td>
        </tr>
        <tr id="mod-edit-{{ m.id }}" hidden>
          <td colspan="5">
            <form hx-ext="json-form" hx-patch="/api/scenarios/{{ sc.id }}/modifiers/{{ m.id }}" hx-swap="none"
                  hx-on::after-request="if(event.detail.successful){window.location.reload()}">
              <label>Ziel-Typ
                <select name="target_type" data-type="str" onchange="onModTargetTypeChange(this)">
                  <option value="category" {% if m.target_type == 'category' %}selected{% endif %}>Kategorie</option>
                  <option value="recurring" {% if m.target_type == 'recurring' %}selected{% endif %}>Wiederkehrender Posten</option>
                </select>
              </label>
              <span class="mod-target-category" {% if m.target_type != 'category' %}style="display:none"{% endif %}>
                <label>Kategorie
                  <select name="target_id" data-type="int" {% if m.target_type != 'category' %}disabled{% endif %}>
                    {% for c in categories %}<option value="{{ c.id }}" {% if m.target_type == 'category' and c.id == m.target_id %}selected{% endif %}>{{ c.name }}</option>{% endfor %}
                  </select>
                </label>
              </span>
              <span class="mod-target-recurring" {% if m.target_type != 'recurring' %}style="display:none"{% endif %}>
                <label>Posten
                  <select name="target_id" data-type="int" {% if m.target_type != 'recurring' %}disabled{% endif %}>
                    {% for r in recurring %}<option value="{{ r.id }}" {% if m.target_type == 'recurring' and r.id == m.target_id %}selected{% endif %}>{{ r.name }}</option>{% endfor %}
                  </select>
                </label>
              </span>
              <label>Art
                <select name="kind" data-type="str" onchange="onEntryArtChange(this)">
                  {% for k in modifier_kinds %}<option value="{{ k }}" {% if k == m.kind %}selected{% endif %}>{{ k|de_label }}</option>{% endfor %}
                </select>
              </label>
              <label>Wert <input type="text" name="value" data-type="amount" value="{{ m.value|eur }}" {% if m.kind not in ('percent', 'absolute') %}disabled{% endif %}></label>
              <label>Endet am <input type="date" name="end_date" value="{{ m.end_date.isoformat() if m.end_date else '' }}" {% if m.kind != 'ende' %}disabled{% endif %}></label>
              <button type="submit">Speichern</button>
              <button type="button" onclick="toggleEdit('mod', {{ m.id }}, false)">Abbrechen</button>
            </form>
          </td>
        </tr>
        {% endfor %}
        {% for sp in row.planned_items %}
        <tr id="spi-row-{{ sp.id }}">
          <td>{{ sp.name }}</td>
          <td>Einmalzahlung</td>
          <td class="{{ 'neg' if sp.amount < 0 else '' }}">{{ sp.amount|eur }} €</td>
          <td>{{ sp.due.strftime('%d.%m.%Y') }}</td>
          <td>
            <button type="button" onclick="toggleEdit('spi', {{ sp.id }}, true)">Bearbeiten</button>
            <form class="inline-form" hx-delete="/api/scenarios/{{ sc.id }}/planned/{{ sp.id }}" hx-swap="none"
                  hx-confirm="„{{ sp.name }}“ wirklich löschen?"
                  hx-on::after-request="if(event.detail.successful){window.location.reload()}">
              <button type="submit">Löschen</button>
            </form>
          </td>
        </tr>
        <tr id="spi-edit-{{ sp.id }}" hidden>
          <td colspan="5">
            <form hx-ext="json-form" hx-patch="/api/scenarios/{{ sc.id }}/planned/{{ sp.id }}" hx-swap="none"
                  hx-on::after-request="if(event.detail.successful){window.location.reload()}">
              <label>Name <input type="text" name="name" value="{{ sp.name }}" required></label>
              <label>Betrag <input type="text" name="amount" data-type="amount" value="{{ sp.amount|eur }}" required></label>
              <label>Fällig am <input type="date" name="due" value="{{ sp.due.isoformat() }}" required></label>
              <button type="submit">Speichern</button>
              <button type="button" onclick="toggleEdit('spi', {{ sp.id }}, false)">Abbrechen</button>
            </form>
          </td>
        </tr>
        {% endfor %}
        {% if not row.modifiers and not row.planned_items %}
        <tr><td colspan="5">Keine Einträge.</td></tr>
        {% endif %}
      </tbody>
    </table>

    <h4>Neuer Eintrag</h4>
    <form class="entry-form" hx-ext="json-form" hx-post="/api/scenarios/{{ sc.id }}/modifiers" hx-swap="none"
          data-modifiers-url="/api/scenarios/{{ sc.id }}/modifiers"
          data-planned-url="/api/scenarios/{{ sc.id }}/planned"
          hx-on::after-request="if(event.detail.successful){window.location.reload()}">
      <div class="entry-art">
        <label>Eintragsart
          <select name="kind" data-type="str" onchange="onEntryArtChange(this)">
            {% for k in modifier_kinds %}<option value="{{ k }}">{{ k|de_label }}</option>{% endfor %}
            <option value="einmal">Einmalzahlung</option>
          </select>
        </label>
        <span class="muted">— die zur Art passenden Felder werden aktiv, gesperrte Felder sind ausgegraut.</span>
      </div>
      <label>Ziel-Typ
        <select name="target_type" data-type="str" onchange="onModTargetTypeChange(this)">
          <option value="category">Kategorie</option>
          <option value="recurring">Wiederkehrender Posten</option>
        </select>
      </label>
      <span class="mod-target-category">
        <label>Kategorie
          <select name="target_id" data-type="int">
            {% for c in categories %}<option value="{{ c.id }}">{{ c.name }}</option>{% endfor %}
          </select>
        </label>
      </span>
      <span class="mod-target-recurring" style="display:none">
        <label>Posten
          <select name="target_id" data-type="int" disabled title="Für diese Eintragsart nicht relevant">
            {% for r in recurring %}<option value="{{ r.id }}">{{ r.name }}</option>{% endfor %}
          </select>
        </label>
      </span>
      <label><span class="value-label">Prozentsatz (%)</span> <input type="text" name="value" data-type="amount" value="0"></label>
      <label>Endet am <input type="date" name="end_date" disabled title="Für diese Eintragsart nicht relevant"></label>
      <label>Name <input type="text" name="name" disabled title="Für diese Eintragsart nicht relevant"></label>
      <label>Betrag <input type="text" name="amount" data-type="amount" placeholder="5000,00" disabled title="Für diese Eintragsart nicht relevant"></label>
      <label>Fällig am <input type="date" name="due" disabled title="Für diese Eintragsart nicht relevant"></label>
      <button type="submit">Hinzufügen</button>
    </form>

    <hr>
    <div class="project-block">
      <form hx-post="/api/scenarios/{{ sc.id }}/project" hx-swap="none"
            hx-on::after-request="if(event.detail.successful){window.location.reload()}">
        <button type="submit">Durchrechnen</button>
      </form>
    </div>

    {% if row.result %}
    <p>
      Tiefpunkt: {{ row.result.low_point_balance|eur }} € am {{ row.result.low_point_date.strftime('%d.%m.%Y') }}<br>
      {% if row.result.below_zero_date %}Unterschreitet 0 € ab {{ row.result.below_zero_date.strftime('%d.%m.%Y') }}<br>{% endif %}
      {% if row.result.below_threshold_date %}Unterschreitet Warnschwelle ab {{ row.result.below_threshold_date.strftime('%d.%m.%Y') }}<br>{% endif %}
      Kurven in <a href="http://{{ request.url.hostname or '127.0.0.1' }}:8097" target="_blank" rel="noopener">Grafana</a> ansehen.
    </p>
    {% else %}
    <p>Noch nicht durchgerechnet.</p>
    {% endif %}
  </fieldset>
  {% else %}
  <p>Noch keine Szenarien.</p>
  {% endfor %}

  <fieldset>
    <legend>Neues Szenario anlegen</legend>
    <form hx-ext="json-form" hx-post="/api/scenarios" hx-swap="none"
          hx-on::after-request="if(event.detail.successful){window.location.reload()}">
      <label>Name <input type="text" name="name" required></label>
      <label>Beschreibung <input type="text" name="description"></label>
      <label><input type="checkbox" name="include_recurring" data-type="bool" checked> Wiederkehrende Posten einschließen</label>
      <label><input type="checkbox" name="include_planned" data-type="bool" checked> Einmalposten einschließen</label>
      <button type="submit">Szenario anlegen</button>
    </form>
  </fieldset>
</section>

<script>
  function onModTargetTypeChange(select) {
    var form = select.closest('form');
    var catSpan = form.querySelector('.mod-target-category');
    var recSpan = form.querySelector('.mod-target-recurring');
    var catSelect = catSpan.querySelector('select');
    var recSelect = recSpan.querySelector('select');
    var isCategory = select.value === 'category';
    catSpan.style.display = isCategory ? '' : 'none';
    recSpan.style.display = isCategory ? 'none' : '';
    catSelect.disabled = !isCategory;
    if (catSelect.disabled) { catSelect.title = 'Für diese Eintragsart nicht relevant'; }
    else { catSelect.removeAttribute('title'); }
    recSelect.disabled = isCategory;
    if (recSelect.disabled) { recSelect.title = 'Für diese Eintragsart nicht relevant'; }
    else { recSelect.removeAttribute('title'); }
  }

  function onEntryArtChange(select) {
    // Umschaltmatrix "Neuer Eintrag"/Modifikator-Edit: Felder nur per
    // disabled schalten (UX-Regel). Fehlt ein Feld (Edit-Formulare haben
    // kein name/amount/due), wird es uebersprungen.
    var form = select.closest('form');
    var art = select.value;
    var isMod = art !== 'einmal';
    function setDisabled(name, disabled) {
      var el = form.querySelector('[name="' + name + '"]');
      if (el) {
        el.disabled = disabled;
        if (disabled) { el.title = 'Für diese Eintragsart nicht relevant'; }
        else { el.removeAttribute('title'); }
      }
    }
    setDisabled('value', !(art === 'percent' || art === 'absolute'));
    var valueLabel = form.querySelector('.value-label');
    if (valueLabel) {
      valueLabel.textContent = art === 'percent' ? 'Prozentsatz (%)'
        : art === 'absolute' ? 'Kürzung (€)' : 'Wert';
    }
    setDisabled('end_date', art !== 'ende');
    setDisabled('name', isMod);
    setDisabled('amount', isMod);
    setDisabled('due', isMod);
    var typeSelect = form.querySelector('[name="target_type"]');
    if (typeSelect) {
      typeSelect.disabled = !isMod;
      if (!isMod) { typeSelect.title = 'Für diese Eintragsart nicht relevant'; }
      else { typeSelect.removeAttribute('title'); }
      var isCategory = typeSelect.value === 'category';
      var catSelect = form.querySelector('.mod-target-category select');
      var recSelect = form.querySelector('.mod-target-recurring select');
      if (catSelect) {
        catSelect.disabled = !isMod || !isCategory;
        if (catSelect.disabled) { catSelect.title = 'Für diese Eintragsart nicht relevant'; }
        else { catSelect.removeAttribute('title'); }
      }
      if (recSelect) {
        recSelect.disabled = !isMod || isCategory;
        if (recSelect.disabled) { recSelect.title = 'Für diese Eintragsart nicht relevant'; }
        else { recSelect.removeAttribute('title'); }
      }
    }
    // POST-Ziel nur beim Anlege-Formular wechseln (Edit-Formulare patchen fix).
    if (form.hasAttribute('data-planned-url')) {
      form.setAttribute('hx-post', isMod ? form.getAttribute('data-modifiers-url')
                                         : form.getAttribute('data-planned-url'));
      htmx.process(form);
    }
  }

  function toggleScenarioLoan(scenarioId, loanId, checked, checkbox) {
    fetch('/api/scenarios/' + scenarioId + '/loans/' + loanId, { method: checked ? 'POST' : 'DELETE' })
      .then(function (resp) {
        if (!resp.ok) {
          throw new Error('HTTP ' + resp.status);
        }
        window.location.reload();
      })
      .catch(function (err) {
        checkbox.checked = !checked;
        alert('Zuordnung fehlgeschlagen: ' + err.message);
      });
  }
</script>
{% endblock %}