data-entry-app/frontend/src/routes/raw-materials/+page.svelte

<script lang="ts">
  import { invalidateAll } from '$app/navigation';
  import { api } from '$lib/api';
  import { clientSession } from '$lib/session';
  import type { Mix, Product, ProductCostBreakdown, RawMaterial } from '$lib/types';

  let { data } = $props();

  let isCreating = $state(false);
  let pendingMaterialId = $state<number | null>(null);
  let successMessage = $state('');
  let errorMessage = $state('');

  const today = new Date().toISOString().slice(0, 10);

  function currency(value: number | null | undefined, digits = 2) {
    if (value === null || value === undefined) {
      return 'N/A';
    }

    return `$${value.toFixed(digits)}`;
  }

  function formatDate(value: string | null | undefined) {
    if (!value) {
      return 'No date';
    }

    return new Intl.DateTimeFormat('en-NZ', {
      day: 'numeric',
      month: 'short',
      year: 'numeric'
    }).format(new Date(value));
  }

  function getImpactedMixes(materialId: number): Mix[] {
    return data.mixes.filter((mix: Mix) => mix.ingredients.some((ingredient) => ingredient.raw_material_id === materialId));
  }

  function getImpactedProducts(materialId: number): Array<Product & { deliveredCost: ProductCostBreakdown | undefined }> {
    const mixIds = new Set(getImpactedMixes(materialId).map((mix) => mix.id));

    return data.products
      .filter((product: Product) => mixIds.has(product.mix_id ?? -1))
      .map((product: Product) => ({
        ...product,
        deliveredCost: data.productCosts.find((row: ProductCostBreakdown) => row.product_id === product.id)
      }));
  }

  async function handleCreateMaterial(event: SubmitEvent) {
    event.preventDefault();
    successMessage = '';
    errorMessage = '';
    isCreating = true;

    const form = event.currentTarget as HTMLFormElement;
    const formData = new FormData(form);

    try {
      await api.createRawMaterial({
        name: String(formData.get('name') ?? '').trim(),
        supplier: String(formData.get('supplier') ?? '').trim() || null,
        unit_of_measure: String(formData.get('unit_of_measure') ?? '').trim(),
        kg_per_unit: Number(formData.get('kg_per_unit')),
        status: String(formData.get('status') ?? 'active'),
        notes: String(formData.get('notes') ?? '').trim() || null,
        initial_price: {
          market_value: Number(formData.get('market_value')),
          waste_percentage: Number(formData.get('waste_percentage')),
          effective_date: String(formData.get('effective_date') ?? today),
          status: 'active',
          notes: String(formData.get('price_notes') ?? '').trim() || null
        }
      });

      form.reset();
      const effectiveDate = form.elements.namedItem('effective_date');
      if (effectiveDate instanceof HTMLInputElement) {
        effectiveDate.value = today;
      }
      successMessage = 'Raw material created and added to the costing model.';
      await invalidateAll();
    } catch (error) {
      errorMessage = error instanceof Error ? error.message : 'Unable to create raw material';
    } finally {
      isCreating = false;
    }
  }

  async function handleAddPrice(event: SubmitEvent, rawMaterialId: number) {
    event.preventDefault();
    successMessage = '';
    errorMessage = '';
    pendingMaterialId = rawMaterialId;

    const form = event.currentTarget as HTMLFormElement;
    const formData = new FormData(form);

    try {
      await api.addRawMaterialPrice(rawMaterialId, {
        market_value: Number(formData.get('market_value')),
        waste_percentage: Number(formData.get('waste_percentage')),
        effective_date: String(formData.get('effective_date') ?? today),
        status: 'active',
        notes: String(formData.get('notes') ?? '').trim() || null
      });

      form.reset();
      const effectiveDate = form.elements.namedItem('effective_date');
      if (effectiveDate instanceof HTMLInputElement) {
        effectiveDate.value = today;
      }
      successMessage = 'Price version saved. Mix and product costs have been refreshed.';
      await invalidateAll();
    } catch (error) {
      errorMessage = error instanceof Error ? error.message : 'Unable to add price version';
    } finally {
      pendingMaterialId = null;
    }
  }

  const totalSpend = $derived(
    data.rawMaterials.reduce(
      (sum: number, material: RawMaterial) => sum + (material.current_price?.market_value ?? 0),
      0
    )
  );
  const averageWaste = $derived(
    data.rawMaterials.length
      ? data.rawMaterials.reduce(
          (sum: number, material: RawMaterial) => sum + (material.current_price?.waste_percentage ?? 0),
          0
        ) / data.rawMaterials.length
      : 0
  );
  const latestEffectiveDate = $derived(
    [...data.rawMaterials]
      .map((material: RawMaterial) => material.current_price?.effective_date)
      .filter(Boolean)
      .sort()
      .at(-1) ?? null
  );
  const activeMaterials = $derived(data.rawMaterials.filter((material: RawMaterial) => material.status === 'active'));
</script>

{#if !$clientSession}
  <section class="locked-card">
    <p class="eyebrow">Client Access Required</p>
    <h2>Sign in on the Hunter Premium Produce home page before viewing raw material pricing.</h2>
    <p>This workflow updates source inputs and pushes new values through mix and product calculations.</p>
    <a href="/">Return to sign-in</a>
  </section>
{:else}
  {#if successMessage}
    <p class="feedback success">{successMessage}</p>
  {/if}

  {#if errorMessage}
    <p class="feedback error">{errorMessage}</p>
  {/if}

  <section class="metric-row">
    <article class="metric-card">
      <span>Total Spend Tracked</span>
      <strong>{currency(totalSpend)}</strong>
      <p>Across current market values</p>
    </article>

    <article class="metric-card">
      <span>Average Waste</span>
      <strong>{(averageWaste * 100).toFixed(1)}%</strong>
      <p>Current blended input loss</p>
    </article>

    <article class="metric-card">
      <span>Latest Price Update</span>
      <strong>{formatDate(latestEffectiveDate)}</strong>
      <p>Most recent effective date on file</p>
    </article>
  </section>

  <section class="top-grid">
    <article class="surface-card form-card">
      <div class="section-heading">
        <div>
          <p class="eyebrow">Create Input</p>
          <h3>Add a new raw material</h3>
        </div>
        <span class="soft-pill">Live costing source</span>
      </div>

      <form class="material-form" onsubmit={handleCreateMaterial}>
        <div class="form-grid">
          <label>
            Name
            <input name="name" required />
          </label>

          <label>
            Supplier
            <input name="supplier" />
          </label>

          <label>
            Unit of measure
            <input name="unit_of_measure" value="tonne" required />
          </label>

          <label>
            Kg per unit
            <input name="kg_per_unit" type="number" min="0.0001" step="0.0001" value="1000" required />
          </label>

          <label>
            Market value
            <input name="market_value" type="number" min="0.0001" step="0.0001" required />
          </label>

          <label>
            Waste percentage
            <input name="waste_percentage" type="number" min="0" max="1" step="0.0001" value="0" required />
          </label>

          <label>
            Effective date
            <input name="effective_date" type="date" value={today} required />
          </label>

          <label>
            Status
            <select name="status">
              <option value="active">Active</option>
              <option value="draft">Draft</option>
              <option value="inactive">Inactive</option>
            </select>
          </label>
        </div>

        <div class="form-grid single">
          <label>
            Material notes
            <textarea name="notes" rows="3"></textarea>
          </label>

          <label>
            Price notes
            <textarea name="price_notes" rows="3"></textarea>
          </label>
        </div>

        <button class="primary-button" type="submit" disabled={isCreating}>
          {isCreating ? 'Creating material...' : 'Create raw material'}
        </button>
      </form>
    </article>

    <div class="summary-stack">
      <article class="surface-card">
        <div class="section-heading">
          <div>
            <p class="eyebrow">Downstream Snapshot</p>
            <h3>Mixes affected by current inputs</h3>
          </div>
        </div>

        <div class="mini-list">
          {#each data.mixes as mix}
            <article>
              <div>
                <strong>{mix.name}</strong>
                <span>{mix.client_name}</span>
              </div>
              <strong>{currency(mix.mix_cost_per_kg, 4)} / kg</strong>
            </article>
          {/each}
        </div>
      </article>

      <article class="surface-card">
        <div class="section-heading">
          <div>
            <p class="eyebrow">Product Exposure</p>
            <h3>Finished outputs linked to live pricing</h3>
          </div>
        </div>

        <div class="mini-list">
          {#each data.productCosts as row}
            <article>
              <div>
                <strong>{row.product_name}</strong>
                <span>{row.warnings.length ? 'Check warnings' : 'Stable pricing'}</span>
              </div>
              <strong>{currency(row.finished_product_delivered)}</strong>
            </article>
          {/each}
        </div>
      </article>
    </div>
  </section>

  <section class="materials-list">
    {#each data.rawMaterials as material}
      {@const impactedMixes = getImpactedMixes(material.id)}
      {@const impactedProducts = getImpactedProducts(material.id)}

      <article class="surface-card material-card">
        <div class="material-header">
          <div class="material-title">
            <span class={`material-icon ${material.status === 'active' ? 'active' : 'muted'}`}>RM</span>
            <div>
              <h3>{material.name}</h3>
              <p>{material.supplier || 'Supplier not set'} · {material.unit_of_measure} · {material.kg_per_unit} kg per unit</p>
            </div>
          </div>

          <span class={`status-pill ${material.status === 'active' ? 'positive' : 'neutral'}`}>{material.status}</span>
        </div>

        <div class="material-grid">
          <section class="stats-grid">
            <article>
              <span>Market value</span>
              <strong>{currency(material.current_price?.market_value)}</strong>
            </article>
            <article>
              <span>Waste</span>
              <strong>
                {material.current_price ? `${(material.current_price.waste_percentage * 100).toFixed(1)}%` : 'N/A'}
              </strong>
            </article>
            <article>
              <span>Cost per kg</span>
              <strong>{currency(material.current_price?.cost_per_kg, 4)}</strong>
            </article>
            <article>
              <span>Effective date</span>
              <strong>{formatDate(material.current_price?.effective_date)}</strong>
            </article>
          </section>

          <form class="price-card" onsubmit={(event) => handleAddPrice(event, material.id)}>
            <div class="section-heading">
              <div>
                <p class="eyebrow">New Version</p>
                <h4>Record a fresh price</h4>
              </div>
            </div>

            <div class="form-grid compact">
              <label>
                Market value
                <input name="market_value" type="number" min="0.0001" step="0.0001" required />
              </label>

              <label>
                Waste percentage
                <input name="waste_percentage" type="number" min="0" max="1" step="0.0001" value="0" required />
              </label>

              <label>
                Effective date
                <input name="effective_date" type="date" value={today} required />
              </label>
            </div>

            <label>
              Notes
              <textarea name="notes" rows="2"></textarea>
            </label>

            <button class="primary-button" type="submit" disabled={pendingMaterialId === material.id}>
              {pendingMaterialId === material.id ? 'Saving price...' : 'Save price version'}
            </button>
          </form>
        </div>

        <div class="impact-grid">
          <section class="impact-card">
            <div class="impact-heading">
              <h4>Impacted mixes</h4>
              <span>{impactedMixes.length}</span>
            </div>

            {#if impactedMixes.length}
              <div class="impact-list">
                {#each impactedMixes as mix}
                  <article>
                    <div>
                      <strong>{mix.name}</strong>
                      <span>{mix.client_name}</span>
                    </div>
                    <strong>{currency(mix.mix_cost_per_kg, 4)} / kg</strong>
                  </article>
                {/each}
              </div>
            {:else}
              <p class="empty">No active mix currently references this material.</p>
            {/if}
          </section>

          <section class="impact-card">
            <div class="impact-heading">
              <h4>Impacted products</h4>
              <span>{impactedProducts.length}</span>
            </div>

            {#if impactedProducts.length}
              <div class="impact-list">
                {#each impactedProducts as product}
                  <article>
                    <div>
                      <strong>{product.name}</strong>
                      <span>{product.mix_name}</span>
                    </div>
                    <strong>{currency(product.deliveredCost?.finished_product_delivered)}</strong>
                  </article>
                {/each}
              </div>
            {:else}
              <p class="empty">No finished product currently depends on this material.</p>
            {/if}
          </section>
        </div>
      </article>
    {/each}
  </section>
{/if}

<style>
  h2,
  h3,
  h4,
  p {
    margin: 0;
  }

  .eyebrow {
    color: #7f8e85;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .locked-card,
  .page-intro,
  .feedback,
  .metric-card,
  .surface-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 1.35rem;
    box-shadow: var(--shadow);
  }

  .locked-card,
  .page-intro,
  .feedback,
  .metric-row,
  .top-grid,
  .materials-list {
    margin-bottom: 1.25rem;
  }

  .locked-card,
  .page-intro,
  .surface-card {
    padding: 1.2rem;
  }

  .locked-card {
    display: grid;
    gap: 0.7rem;
    max-width: 42rem;
  }

  .locked-card h2,
  .page-intro h2 {
    margin: 0.35rem 0 0.45rem;
    font-size: clamp(1.7rem, 3vw, 2.25rem);
    font-weight: 700;
  }

  .locked-card p:last-of-type,
  .page-intro p:last-child,
  .metric-card p,
  .intro-chip span,
  .mini-list span,
  .material-title p,
  .stats-grid span,
  .impact-list span,
  .empty {
    color: var(--muted);
  }

  .locked-card a {
    color: var(--green-deep);
    font-weight: 600;
  }

  .page-intro {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 1rem;
  }

  .intro-chip {
    display: grid;
    gap: 0.25rem;
    padding: 0.95rem 1rem;
    border: 1px solid var(--line);
    border-radius: 1rem;
    background: var(--panel-soft);
  }

  .intro-chip strong {
    font-size: 1rem;
  }

  .feedback {
    padding: 0.95rem 1rem;
    font-weight: 600;
  }

  .feedback.success {
    color: var(--green-deep);
    border-color: #d8ecdf;
    background: #f6fcf8;
  }

  .feedback.error {
    color: #a03737;
    border-color: #f0d9d9;
    background: #fff8f8;
  }

  .metric-row,
  .top-grid,
  .material-grid,
  .impact-grid {
    display: grid;
    gap: 1rem;
  }

  .metric-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .metric-card {
    padding: 1.15rem 1.2rem;
  }

  .metric-card span {
    display: block;
    color: var(--muted);
    font-size: 0.9rem;
  }

  .metric-card strong {
    display: block;
    margin: 0.55rem 0 0.3rem;
    font-size: 1.9rem;
    font-weight: 700;
  }

  .top-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.85fr);
  }

  .summary-stack {
    display: grid;
    gap: 1rem;
  }

  .section-heading,
  .material-header,
  .impact-heading,
  .mini-list article,
  .impact-list article {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
  }

  .section-heading {
    margin-bottom: 1rem;
  }

  .section-heading h3,
  .material-header h3,
  .impact-heading h4 {
    font-size: 1.12rem;
    font-weight: 700;
  }

  .soft-pill {
    padding: 0.48rem 0.8rem;
    border-radius: 999px;
    color: var(--green-deep);
    background: var(--green-soft);
    font-size: 0.86rem;
    font-weight: 600;
  }

  .material-form,
  .price-card {
    display: grid;
    gap: 1rem;
  }

  .form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
  }

  .form-grid.single {
    grid-template-columns: 1fr;
  }

  .form-grid.compact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  label {
    display: grid;
    gap: 0.35rem;
    color: #53645b;
    font-size: 0.9rem;
    font-weight: 600;
  }

  input,
  textarea,
  select {
    width: 100%;
    padding: 0.9rem 0.95rem;
    border: 1px solid var(--line-strong);
    border-radius: 0.95rem;
    background: var(--panel-soft);
    color: var(--text);
  }

  .primary-button {
    justify-self: start;
    padding: 0.85rem 1rem;
    border: none;
    border-radius: 0.9rem;
    color: #fff;
    background: linear-gradient(135deg, var(--green) 0%, var(--green-deep) 100%);
    box-shadow: 0 8px 20px rgba(34, 169, 94, 0.18);
    font-weight: 600;
    cursor: pointer;
  }

  .primary-button:disabled {
    opacity: 0.7;
    cursor: wait;
  }

  .mini-list,
  .impact-list,
  .materials-list {
    display: grid;
    gap: 0.8rem;
  }

  .mini-list article,
  .impact-list article {
    padding: 0.95rem 1rem;
    border: 1px solid var(--line);
    border-radius: 1rem;
    background: var(--panel-soft);
  }

  .material-card {
    display: grid;
    gap: 1.1rem;
  }

  .material-title {
    display: flex;
    align-items: center;
    gap: 0.85rem;
  }

  .material-icon {
    width: 2.4rem;
    height: 2.4rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.85rem;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    flex-shrink: 0;
  }

  .material-icon.active {
    color: #fff;
    background: linear-gradient(135deg, var(--green) 0%, var(--green-deep) 100%);
  }

  .material-icon.muted {
    color: #55685f;
    background: #e9efeb;
  }

  .status-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.42rem 0.78rem;
    border-radius: 999px;
    font-size: 0.84rem;
    font-weight: 600;
    text-transform: capitalize;
  }

  .status-pill.positive {
    color: var(--green-deep);
    background: var(--green-soft);
  }

  .status-pill.neutral {
    color: #5a6c63;
    background: #edf2ef;
  }

  .material-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem;
  }

  .stats-grid article,
  .price-card,
  .impact-card {
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: 1rem;
    background: var(--panel-soft);
  }

  .stats-grid strong {
    display: block;
    margin-top: 0.35rem;
    font-size: 1.1rem;
    font-weight: 700;
  }

  .impact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .impact-heading {
    margin-bottom: 0.9rem;
  }

  .impact-heading span {
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 600;
  }

  @media (max-width: 1180px) {
    .metric-row,
    .top-grid,
    .material-grid,
    .impact-grid,
    .stats-grid {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 820px) {
    .page-intro,
    .section-heading,
    .material-header,
    .impact-heading,
    .mini-list article,
    .impact-list article {
      flex-direction: column;
      align-items: flex-start;
    }

    .form-grid,
    .form-grid.compact {
      grid-template-columns: 1fr;
    }
  }
</style>