v1.2 scaffold

frontend/src/lib/api.ts

@@ -0,0 +1,74 @@
+import { env } from '$env/dynamic/public';
+import { mockCosts, mockMixes, mockProducts, mockRawMaterials, mockScenarios } from '$lib/mock';
+import type {
+  LoginResponse,
+  Product,
+  ProductCostBreakdown,
+  RawMaterial,
+  RawMaterialCreateInput,
+  RawMaterialPriceCreateInput,
+  Scenario
+} from '$lib/types';
+
+const API_BASE_URL = env.PUBLIC_API_BASE_URL || 'http://localhost:8000';
+
+async function fetchJson<T>(path: string, fallback: T): Promise<T> {
+  try {
+    const response = await fetch(`${API_BASE_URL}${path}`);
+    if (!response.ok) {
+      return fallback;
+    }
+    return (await response.json()) as T;
+  } catch {
+    return fallback;
+  }
+}
+
+async function request<T>(path: string, options: RequestInit): Promise<T> {
+  const response = await fetch(`${API_BASE_URL}${path}`, {
+    headers: {
+      'Content-Type': 'application/json',
+      ...(options.headers ?? {})
+    },
+    ...options
+  });
+
+  if (!response.ok) {
+    let message = 'Request failed';
+
+    try {
+      const body = (await response.json()) as { detail?: string };
+      message = body.detail ?? message;
+    } catch {
+      message = response.statusText || message;
+    }
+
+    throw new Error(message);
+  }
+
+  return (await response.json()) as T;
+}
+
+export const api = {
+  rawMaterials: () => fetchJson<RawMaterial[]>('/api/raw-materials', mockRawMaterials),
+  mixes: () => fetchJson('/api/mixes', mockMixes),
+  products: () => fetchJson<Product[]>('/api/products', mockProducts),
+  productCosts: () => fetchJson<ProductCostBreakdown[]>('/api/powerbi/product-costs', mockCosts),
+  scenarios: () => fetchJson<Scenario[]>('/api/scenarios', mockScenarios),
+  dataQuality: () => fetchJson('/api/powerbi/data-quality-issues', []),
+  login: (email: string, password: string) =>
+    request<LoginResponse>('/api/auth/login', {
+      method: 'POST',
+      body: JSON.stringify({ email, password })
+    }),
+  createRawMaterial: (payload: RawMaterialCreateInput) =>
+    request<RawMaterial>('/api/raw-materials', {
+      method: 'POST',
+      body: JSON.stringify(payload)
+    }),
+  addRawMaterialPrice: (rawMaterialId: number, payload: RawMaterialPriceCreateInput) =>
+    request(`/api/raw-materials/${rawMaterialId}/prices`, {
+      method: 'POST',
+      body: JSON.stringify(payload)
+    })
+};