Refactor SP-API test script and improve type definitions

- Updated `sp-test.ts` to enhance argument parsing and error handling for sellability checks.
- Refactored `types.ts` to maintain consistent formatting and improve readability.
- Improved `writer.ts` for better result handling and CSV writing, ensuring clarity in output.
- Adjusted `tsconfig.json` formatting for consistency and readability.

src/types.ts

@@ -1,75 +1,75 @@
-export interface ProductRecord {
-  asin: string;
-  name: string;
-  unitCost: number;
-  brand?: string;
-  category?: string;
-  amazonRank?: number;
-  avgPrice90FromSheet?: number;
-  sellingPriceFromSheet?: number;
-  fbaNet?: number;
-  grossProfit?: number;
-  grossProfitPct?: number;
-  netProfitFromSheet?: number;
-  roiFromSheet?: number;
-  moq?: number;
-  moqCost?: number;
-  totalQtyAvail?: number;
-
-  link?: string;
-  asinLink?: string;
-  sourceUrl?: string;
-  supplier?: string;
-  promoCouponCode?: string;
-  notes?: string;
-  leadDate?: string;
-  [key: string]: unknown;
-}
-
-export interface KeepaData {
-  currentPrice: number | null;
-  avgPrice90: number | null;
-  minPrice90: number | null;
-  maxPrice90: number | null;
-  salesRank: number | null;
-  salesRankAvg90: number | null;
-  salesRankDrops30: number | null;
-  salesRankDrops90: number | null;
-  sellerCount: number | null;
-  buyBoxSeller: string | null;
-  buyBoxPrice: number | null;
-  monthlySold: number | null;
-  categoryTree: string[];
-}
-
-export type SellabilityInfo = {
-  canSell: boolean | null;
-  sellabilityStatus: "available" | "restricted" | "not_available" | "unknown";
-  sellabilityReason?: string;
-};
-
-export interface SpApiData extends SellabilityInfo {
-  fbaFee: number;
-  fbmFee: number;
-  referralFeePercent: number;
-  estimatedSalePrice: number;
-}
-
-export interface EnrichedProduct {
-  record: ProductRecord;
-  keepa: KeepaData | null;
-  spApi: SpApiData;
-  fetchedAt: string;
-}
-
-export interface LlmVerdict {
-  asin: string;
-  verdict: "FBA" | "FBM" | "SKIP";
-  confidence: number;
-  reasoning: string;
-}
-
-export interface AnalysisResult {
-  product: EnrichedProduct;
-  verdict: LlmVerdict;
-}
+export interface ProductRecord {
+  asin: string;
+  name: string;
+  unitCost: number;
+  brand?: string;
+  category?: string;
+  amazonRank?: number;
+  avgPrice90FromSheet?: number;
+  sellingPriceFromSheet?: number;
+  fbaNet?: number;
+  grossProfit?: number;
+  grossProfitPct?: number;
+  netProfitFromSheet?: number;
+  roiFromSheet?: number;
+  moq?: number;
+  moqCost?: number;
+  totalQtyAvail?: number;
+
+  link?: string;
+  asinLink?: string;
+  sourceUrl?: string;
+  supplier?: string;
+  promoCouponCode?: string;
+  notes?: string;
+  leadDate?: string;
+  [key: string]: unknown;
+}
+
+export interface KeepaData {
+  currentPrice: number | null;
+  avgPrice90: number | null;
+  minPrice90: number | null;
+  maxPrice90: number | null;
+  salesRank: number | null;
+  salesRankAvg90: number | null;
+  salesRankDrops30: number | null;
+  salesRankDrops90: number | null;
+  sellerCount: number | null;
+  buyBoxSeller: string | null;
+  buyBoxPrice: number | null;
+  monthlySold: number | null;
+  categoryTree: string[];
+}
+
+export type SellabilityInfo = {
+  canSell: boolean | null;
+  sellabilityStatus: "available" | "restricted" | "not_available" | "unknown";
+  sellabilityReason?: string;
+};
+
+export interface SpApiData extends SellabilityInfo {
+  fbaFee: number;
+  fbmFee: number;
+  referralFeePercent: number;
+  estimatedSalePrice: number;
+}
+
+export interface EnrichedProduct {
+  record: ProductRecord;
+  keepa: KeepaData | null;
+  spApi: SpApiData;
+  fetchedAt: string;
+}
+
+export interface LlmVerdict {
+  asin: string;
+  verdict: "FBA" | "FBM" | "SKIP";
+  confidence: number;
+  reasoning: string;
+}
+
+export interface AnalysisResult {
+  product: EnrichedProduct;
+  verdict: LlmVerdict;
+}