import index from "./web/index.html";
import { getDb, initDb } from "./database.ts";
import { fetchKeepaDataBatch } from "./keepa.ts";
import { fetchSellabilityBatch, fetchSpApiPricingAndFees } from "./sp-api.ts";
import { analyzeProducts } from "./llm.ts";
import type { EnrichedProduct, ProductRecord, SpApiData } from "./types.ts";

type ProcessType = "lead_analysis" | "category_analysis";

type RunRecord = {
  processType: ProcessType;
  runId: number;
  timestamp: string;
  status: string;
  jobType: string;
  source: string | null;
  output: string | null;
  totalProducts: number;
  fbaCount: number;
  fbmCount: number;
  skipCount: number;
};

type ProductListRecord = {
  processType: ProcessType;
  runId: number;
  asin: string;
  product_name: string | null;
  brand: string | null;
  category: string | null;
  verdict: "FBA" | "FBM" | "SKIP";
  confidence: number | null;
  sellability_status: string | null;
  monthly_sold: number | null;
  seller_count: number | null;
  amazon_is_seller: number | null;
  amazon_buybox_share_pct_90d: number | null;
  sales_rank: number | null;
  current_price: number | null;
  avg_price_90d: number | null;
  reasoning: string | null;
  fetched_at: string;
};

const DB_PATH = process.env.RESULTS_DB_PATH || "./results.db";
const DEFAULT_PAGE_SIZE = 25;
const MAX_PAGE_SIZE = 200;
const ASIN_PATTERN = /^[A-Z0-9]{10}$/;

initDb(DB_PATH);
const db = getDb(DB_PATH);

function json(data: unknown, status = 200): Response {
  return new Response(JSON.stringify(data), {
    status,
    headers: { "content-type": "application/json; charset=utf-8" },
  });
}

function csv(text: string, filename: string): Response {
  return new Response(text, {
    status: 200,
    headers: {
      "content-type": "text/csv; charset=utf-8",
      "content-disposition": `attachment; filename="${filename}"`,
    },
  });
}

function parseIntParam(value: string | null, fallback: number): number {
  if (!value) return fallback;
  const parsed = Number.parseInt(value, 10);
  if (!Number.isFinite(parsed) || parsed < 1) return fallback;
  return parsed;
}

function normalizeAsin(value: string): string {
  return value.trim().toUpperCase();
}

function isValidAsin(value: string): boolean {
  return ASIN_PATTERN.test(value);
}

function parseSort(
  sortParam: string | null,
  allowed: Set<string>,
  fallback: string,
): string {
  if (!sortParam) return fallback;
  const clauses = sortParam
    .split(",")
    .map((chunk) => chunk.trim())
    .filter(Boolean)
    .map((chunk) => {
      const [fieldRaw, dirRaw] = chunk.split(":");
      const field = fieldRaw?.trim();
      const dir = dirRaw?.trim().toUpperCase() === "DESC" ? "DESC" : "ASC";
      if (!field || !allowed.has(field)) return null;
      return `${field} ${dir}`;
    })
    .filter((value): value is string => value !== null);

  return clauses.length > 0 ? clauses.join(", ") : fallback;
}

function parseResultSort(
  sortParam: string | null,
  allowed: Set<string>,
  fallback: string,
): string {
  if (!sortParam) return fallback;
  const clauses = sortParam
    .split(",")
    .map((chunk) => chunk.trim())
    .filter(Boolean)
    .map((chunk) => {
      const [fieldRaw, dirRaw] = chunk.split(":");
      const field = fieldRaw?.trim();
      const dir = dirRaw?.trim().toUpperCase() === "DESC" ? "DESC" : "ASC";
      if (!field || !allowed.has(field)) return null;
      if (field === "monthly_sold")
        return `CAST(COALESCE(monthly_sold, 0) AS INTEGER) ${dir}`;
      if (field === "amazon_is_seller")
        return `CAST(COALESCE(amazon_is_seller, 0) AS INTEGER) ${dir}`;
      if (field === "amazon_buybox_share_pct_90d") {
        return `CAST(COALESCE(amazon_buybox_share_pct_90d, 0) AS REAL) ${dir}`;
      }
      return `${field} ${dir}`;
    })
    .filter((value): value is string => value !== null);

  return clauses.length > 0 ? clauses.join(", ") : fallback;
}

function escapeCsvValue(value: unknown): string {
  if (value === null || value === undefined) return "";
  const text = String(value);
  const escaped = text.replaceAll('"', '""');
  return /[",\n]/.test(escaped) ? `"${escaped}"` : escaped;
}

function parseResultFilters(
  processType: ProcessType,
  runId: number,
  filters: URLSearchParams,
) {
  const q = filters.get("q")?.trim() || "";
  const verdict = filters.get("verdict")?.trim();
  const sellabilityStatus = filters.get("sellabilityStatus")?.trim();
  const minConfidence = filters.get("minConfidence")?.trim();
  const maxConfidence = filters.get("maxConfidence")?.trim();

  const conditions: string[] = ["run_id = ?"];
  const params: Array<string | number> = [runId];

  if (verdict) {
    conditions.push("verdict = ?");
    params.push(verdict);
  }

  if (sellabilityStatus) {
    conditions.push("sellability_status = ?");
    params.push(sellabilityStatus);
  }

  if (minConfidence) {
    conditions.push("confidence >= ?");
    params.push(Number(minConfidence));
  }

  if (maxConfidence) {
    conditions.push("confidence <= ?");
    params.push(Number(maxConfidence));
  }

  if (q) {
    const wildcard = `%${q}%`;
    if (processType === "lead_analysis") {
      conditions.push(
        "(asin LIKE ? OR product_name LIKE ? OR brand LIKE ? OR category LIKE ? OR reasoning LIKE ?)",
      );
      params.push(wildcard, wildcard, wildcard, wildcard, wildcard);
    } else {
      conditions.push(
        "(asin LIKE ? OR name LIKE ? OR brand LIKE ? OR category LIKE ? OR reasoning LIKE ?)",
      );
      params.push(wildcard, wildcard, wildcard, wildcard, wildcard);
    }
  }

  return {
    where: `WHERE ${conditions.join(" AND ")}`,
    params,
  };
}

function getRuns(filters: URLSearchParams) {
  const q = filters.get("q")?.trim() || "";
  const processType = filters.get("processType")?.trim();
  const status = filters.get("status")?.trim();
  const startDate = filters.get("startDate")?.trim();
  const endDate = filters.get("endDate")?.trim();
  const page = parseIntParam(filters.get("page"), 1);
  const pageSize = Math.min(
    parseIntParam(filters.get("pageSize"), DEFAULT_PAGE_SIZE),
    MAX_PAGE_SIZE,
  );
  const offset = (page - 1) * pageSize;

  const allowedSort = new Set([
    "timestamp",
    "status",
    "totalProducts",
    "fbaCount",
    "fbmCount",
    "skipCount",
    "runId",
    "jobType",
  ]);
  const orderBy = parseSort(
    filters.get("sort"),
    allowedSort,
    "timestamp DESC, runId DESC",
  );

  const conditions: string[] = [];
  const params: Array<string | number> = [];

  if (processType === "lead_analysis" || processType === "category_analysis") {
    conditions.push("processType = ?");
    params.push(processType);
  }

  if (status) {
    conditions.push("status = ?");
    params.push(status);
  }

  if (startDate) {
    conditions.push("timestamp >= ?");
    params.push(startDate);
  }

  if (endDate) {
    conditions.push("timestamp <= ?");
    params.push(endDate);
  }

  if (q) {
    conditions.push(
      "(jobType LIKE ? OR source LIKE ? OR output LIKE ? OR CAST(runId AS TEXT) LIKE ?)",
    );
    const wildcard = `%${q}%`;
    params.push(wildcard, wildcard, wildcard, wildcard);
  }

  const where =
    conditions.length > 0 ? `WHERE ${conditions.join(" AND ")}` : "";

  const baseUnion = `
    SELECT
      'lead_analysis' AS processType,
      id AS runId,
      timestamp,
      'completed' AS status,
      'lead_file_analysis' AS jobType,
      input_file AS source,
      output_file AS output,
      COALESCE(total_products, 0) AS totalProducts,
      COALESCE(fba_count, 0) AS fbaCount,
      COALESCE(fbm_count, 0) AS fbmCount,
      COALESCE(skip_count, 0) AS skipCount
    FROM runs
    UNION ALL
    SELECT
      'category_analysis' AS processType,
      id AS runId,
      run_timestamp AS timestamp,
      status,
      category_label AS jobType,
      CAST(category_id AS TEXT) AS source,
      NULL AS output,
      COALESCE(top_asins_checked, 0) AS totalProducts,
      COALESCE(fba_count, 0) AS fbaCount,
      COALESCE(fbm_count, 0) AS fbmCount,
      COALESCE(skip_count, 0) AS skipCount
    FROM category_analysis_runs
  `;

  const totalRow = db
    .query(`SELECT COUNT(*) as total FROM (${baseUnion}) all_runs ${where}`)
    .get(...params) as { total: number };

  const items = db
    .query(
      `SELECT * FROM (${baseUnion}) all_runs ${where} ORDER BY ${orderBy} LIMIT ? OFFSET ?`,
    )
    .all(...params, pageSize, offset) as RunRecord[];

  return {
    items,
    page,
    pageSize,
    total: totalRow.total,
    totalPages: Math.max(1, Math.ceil(totalRow.total / pageSize)),
  };
}

function getProductList(filters: URLSearchParams) {
  const q = filters.get("q")?.trim() || "";
  const verdict = filters.get("verdict")?.trim();
  const page = parseIntParam(filters.get("page"), 1);
  const pageSize = Math.min(
    parseIntParam(filters.get("pageSize"), DEFAULT_PAGE_SIZE),
    MAX_PAGE_SIZE,
  );
  const offset = (page - 1) * pageSize;

  const conditions: string[] = [];
  const params: Array<string | number> = [];

  if (verdict === "FBA" || verdict === "FBM" || verdict === "SKIP") {
    conditions.push("verdict = ?");
    params.push(verdict);
  }

  if (q) {
    const wildcard = `%${q}%`;
    conditions.push(
      "(asin LIKE ? OR product_name LIKE ? OR brand LIKE ? OR category LIKE ?)",
    );
    params.push(wildcard, wildcard, wildcard, wildcard);
  }

  const where =
    conditions.length > 0 ? `WHERE ${conditions.join(" AND ")}` : "";
  const allowedSort = new Set([
    "asin",
    "verdict",
    "monthly_sold",
    "seller_count",
    "amazon_is_seller",
    "amazon_buybox_share_pct_90d",
    "sales_rank",
    "current_price",
    "product_name",
    "brand",
    "category",
    "avg_price_90d",
    "confidence",
    "reasoning",
    "fetched_at",
  ]);
  const orderBy = parseResultSort(
    filters.get("sort"),
    allowedSort,
    "CAST(COALESCE(monthly_sold, 0) AS INTEGER) DESC, fetched_at DESC",
  );

  const baseUnion = `
    SELECT
      'lead_analysis' AS processType,
      run_id AS runId,
      asin,
      product_name,
      brand,
      category,
      verdict,
      confidence,
      sellability_status,
      monthly_sold,
      sellers AS seller_count,
      amazon_is_seller,
      amazon_buybox_share_pct_90d,
      sales_rank,
      current_price,
      avg_price_90d,
      reasoning,
      fetched_at
    FROM results
    UNION ALL
    SELECT
      'category_analysis' AS processType,
      run_id AS runId,
      asin,
      name AS product_name,
      brand,
      category,
      verdict,
      confidence,
      sellability_status,
      monthly_sold,
      seller_count,
      amazon_is_seller,
      amazon_buybox_share_pct_90d,
      sales_rank,
      current_price,
      avg_price_90d,
      reasoning,
      fetched_at
    FROM product_analysis_results
  `;

  const totalRow = db
    .query(`SELECT COUNT(*) as total FROM (${baseUnion}) all_products ${where}`)
    .get(...params) as { total: number };

  const items = db
    .query(
      `SELECT * FROM (${baseUnion}) all_products ${where} ORDER BY ${orderBy} LIMIT ? OFFSET ?`,
    )
    .all(...params, pageSize, offset) as ProductListRecord[];

  return {
    items,
    page,
    pageSize,
    total: totalRow.total,
    totalPages: Math.max(1, Math.ceil(totalRow.total / pageSize)),
  };
}

function getRun(processType: ProcessType, runId: number) {
  if (processType === "lead_analysis") {
    const run = db
      .query(
        `SELECT
          id AS runId,
          timestamp,
          'completed' AS status,
          'lead_file_analysis' AS jobType,
          input_file AS source,
          output_file AS output,
          COALESCE(total_products, 0) AS totalProducts,
          COALESCE(fba_count, 0) AS fbaCount,
          COALESCE(fbm_count, 0) AS fbmCount,
          COALESCE(skip_count, 0) AS skipCount
        FROM runs WHERE id = ?`,
      )
      .get(runId);
    return run ?? null;
  }

  const run = db
    .query(
      `SELECT
        id AS runId,
        run_timestamp AS timestamp,
        status,
        category_label AS jobType,
        CAST(category_id AS TEXT) AS source,
        NULL AS output,
        COALESCE(top_asins_checked, 0) AS totalProducts,
        COALESCE(fba_count, 0) AS fbaCount,
        COALESCE(fbm_count, 0) AS fbmCount,
        COALESCE(skip_count, 0) AS skipCount,
        error_message AS errorMessage,
        available_asins AS availableAsins
      FROM category_analysis_runs WHERE id = ?`,
    )
    .get(runId);
  return run ?? null;
}

function getRunResults(
  processType: ProcessType,
  runId: number,
  filters: URLSearchParams,
) {
  const page = parseIntParam(filters.get("page"), 1);
  const pageSize = Math.min(
    parseIntParam(filters.get("pageSize"), DEFAULT_PAGE_SIZE),
    MAX_PAGE_SIZE,
  );
  const offset = (page - 1) * pageSize;

  const tableName =
    processType === "lead_analysis" ? "results" : "product_analysis_results";
  const productNameSelect =
    processType === "lead_analysis" ? "product_name" : "name AS product_name";
  const sellerCountSelect =
    processType === "lead_analysis"
      ? "sellers AS seller_count"
      : "seller_count";
  const salesRankAvgSelect =
    processType === "lead_analysis"
      ? "rank_avg_90d AS sales_rank_avg_90d"
      : "sales_rank_avg_90d";

  const { where, params } = parseResultFilters(processType, runId, filters);

  const allowedSort = new Set([
    "asin",
    "product_name",
    "brand",
    "category",
    "current_price",
    "avg_price_90d",
    "sales_rank",
    "seller_count",
    "amazon_is_seller",
    "amazon_buybox_share_pct_90d",
    "monthly_sold",
    "verdict",
    "confidence",
    "fetched_at",
  ]);
  const orderBy = parseResultSort(
    filters.get("sort"),
    allowedSort,
    "CAST(COALESCE(monthly_sold, 0) AS INTEGER) DESC, asin ASC",
  );

  const totalRow = db
    .query(`SELECT COUNT(*) as total FROM ${tableName} ${where}`)
    .get(...params) as { total: number };

  const items = db
    .query(
      `SELECT
        id,
        run_id,
        asin,
        ${productNameSelect},
        brand,
        category,
        unit_cost,
        current_price,
        avg_price_90d,
        avg_price_90d_sheet,
        selling_price_sheet,
        sales_rank,
        ${salesRankAvgSelect},
        ${sellerCountSelect},
        amazon_is_seller,
        amazon_buybox_share_pct_90d,
        monthly_sold,
        rank_drops_30d,
        rank_drops_90d,
        fba_fee,
        fbm_fee,
        referral_percent,
        can_sell,
        sellability_status,
        sellability_reason,
        verdict,
        confidence,
        reasoning,
        fetched_at
      FROM ${tableName}
      ${where}
      ORDER BY ${orderBy}
      LIMIT ? OFFSET ?`,
    )
    .all(...params, pageSize, offset);

  return {
    items,
    page,
    pageSize,
    total: totalRow.total,
    totalPages: Math.max(1, Math.ceil(totalRow.total / pageSize)),
  };
}

function deleteRun(processType: ProcessType, runId: number) {
  if (processType === "lead_analysis") {
    const resultRows = db
      .query("DELETE FROM results WHERE run_id = ?")
      .run(runId);
    const runRows = db.query("DELETE FROM runs WHERE id = ?").run(runId);
    return {
      deletedRun: runRows.changes > 0,
      deletedResults: resultRows.changes,
    };
  }

  const resultRows = db
    .query("DELETE FROM product_analysis_results WHERE run_id = ?")
    .run(runId);
  const runRows = db
    .query("DELETE FROM category_analysis_runs WHERE id = ?")
    .run(runId);
  return {
    deletedRun: runRows.changes > 0,
    deletedResults: resultRows.changes,
  };
}

function exportRunResultsCsv(
  processType: ProcessType,
  runId: number,
  filters: URLSearchParams,
) {
  const tableName =
    processType === "lead_analysis" ? "results" : "product_analysis_results";
  const productNameSelect =
    processType === "lead_analysis" ? "product_name" : "name AS product_name";
  const sellerCountSelect =
    processType === "lead_analysis"
      ? "sellers AS seller_count"
      : "seller_count";
  const salesRankAvgSelect =
    processType === "lead_analysis"
      ? "rank_avg_90d AS sales_rank_avg_90d"
      : "sales_rank_avg_90d";

  const { where, params } = parseResultFilters(processType, runId, filters);

  const allowedSort = new Set([
    "asin",
    "product_name",
    "brand",
    "category",
    "current_price",
    "avg_price_90d",
    "sales_rank",
    "seller_count",
    "amazon_is_seller",
    "amazon_buybox_share_pct_90d",
    "monthly_sold",
    "verdict",
    "confidence",
    "fetched_at",
  ]);
  const orderBy = parseResultSort(
    filters.get("sort"),
    allowedSort,
    "CAST(COALESCE(monthly_sold, 0) AS INTEGER) DESC, asin ASC",
  );

  const rows = db
    .query(
      `SELECT
        run_id,
        asin,
        ${productNameSelect},
        brand,
        category,
        unit_cost,
        current_price,
        avg_price_90d,
        ${salesRankAvgSelect},
        ${sellerCountSelect},
        amazon_is_seller,
        amazon_buybox_share_pct_90d,
        monthly_sold,
        sellability_status,
        verdict,
        confidence,
        reasoning,
        fetched_at
      FROM ${tableName}
      ${where}
      ORDER BY ${orderBy}`,
    )
    .all(...params) as Array<Record<string, unknown>>;

  const headers = [
    "run_id",
    "asin",
    "product_name",
    "brand",
    "category",
    "unit_cost",
    "current_price",
    "avg_price_90d",
    "sales_rank_avg_90d",
    "seller_count",
    "amazon_is_seller",
    "amazon_buybox_share_pct_90d",
    "monthly_sold",
    "sellability_status",
    "verdict",
    "confidence",
    "reasoning",
    "fetched_at",
  ];

  const lines = [headers.join(",")];
  for (const row of rows) {
    lines.push(headers.map((h) => escapeCsvValue(row[h])).join(","));
  }

  return lines.join("\n");
}

type ReanalyzeSourceRow = {
  asin: string;
  product_name: string | null;
  brand: string | null;
  category: string | null;
  unit_cost: number | null;
  sales_rank: number | null;
  avg_price_90d_sheet: number | null;
  selling_price_sheet: number | null;
  fba_net_sheet: number | null;
  gross_profit_dollar: number | null;
  gross_profit_pct: number | null;
  net_profit_sheet: number | null;
  roi_sheet: number | null;
  moq: number | null;
  moq_cost: number | null;
  qty_available: number | null;
  supplier: string | null;
  source_url: string | null;
  asin_link: string | null;
  promo_coupon_code: string | null;
  notes: string | null;
  lead_date: string | null;
};

function getReanalyzeSourceRow(
  processType: ProcessType,
  runId: number,
  asin: string,
): ReanalyzeSourceRow | null {
  if (processType === "lead_analysis") {
    return (
      (db
        .query(
          `SELECT
          asin,
          product_name,
          brand,
          category,
          unit_cost,
          sales_rank,
          avg_price_90d_sheet,
          selling_price_sheet,
          fba_net_sheet,
          gross_profit_dollar,
          gross_profit_pct,
          net_profit_sheet,
          roi_sheet,
          moq,
          moq_cost,
          qty_available,
          supplier,
          source_url,
          asin_link,
          promo_coupon_code,
          notes,
          lead_date
        FROM results
        WHERE run_id = ? AND asin = ?
        LIMIT 1`,
        )
        .get(runId, asin) as ReanalyzeSourceRow | null) ?? null
    );
  }

  return (
    (db
      .query(
        `SELECT
        asin,
        name AS product_name,
        brand,
        category,
        unit_cost,
        sales_rank,
        avg_price_90d_sheet,
        selling_price_sheet,
        NULL AS fba_net_sheet,
        NULL AS gross_profit_dollar,
        NULL AS gross_profit_pct,
        NULL AS net_profit_sheet,
        NULL AS roi_sheet,
        NULL AS moq,
        NULL AS moq_cost,
        NULL AS qty_available,
        NULL AS supplier,
        NULL AS source_url,
        NULL AS asin_link,
        NULL AS promo_coupon_code,
        NULL AS notes,
        NULL AS lead_date
      FROM product_analysis_results
      WHERE run_id = ? AND asin = ?
      LIMIT 1`,
      )
      .get(runId, asin) as ReanalyzeSourceRow | null) ?? null
  );
}

function toProductRecord(row: ReanalyzeSourceRow): ProductRecord {
  return {
    asin: row.asin,
    name: row.product_name ?? row.asin,
    unitCost: row.unit_cost ?? 0,
    brand: row.brand ?? undefined,
    category: row.category ?? undefined,
    amazonRank: row.sales_rank ?? undefined,
    avgPrice90FromSheet: row.avg_price_90d_sheet ?? undefined,
    sellingPriceFromSheet: row.selling_price_sheet ?? undefined,
    fbaNet: row.fba_net_sheet ?? undefined,
    grossProfit: row.gross_profit_dollar ?? undefined,
    grossProfitPct: row.gross_profit_pct ?? undefined,
    netProfitFromSheet: row.net_profit_sheet ?? undefined,
    roiFromSheet: row.roi_sheet ?? undefined,
    moq: row.moq ?? undefined,
    moqCost: row.moq_cost ?? undefined,
    totalQtyAvail: row.qty_available ?? undefined,
    supplier: row.supplier ?? undefined,
    sourceUrl: row.source_url ?? undefined,
    asinLink: row.asin_link ?? undefined,
    promoCouponCode: row.promo_coupon_code ?? undefined,
    notes: row.notes ?? undefined,
    leadDate: row.lead_date ?? undefined,
  };
}

function unknownSpApiData(): SpApiData {
  return {
    fbaFee: 5.0,
    fbmFee: 1.5,
    referralFeePercent: 15,
    estimatedSalePrice: 0,
    canSell: null,
    sellabilityStatus: "unknown",
    sellabilityReason: "Sellability check returned no result",
  };
}

function refreshRunCounts(processType: ProcessType, runId: number): void {
  if (processType === "lead_analysis") {
    const stats = db
      .query(
        `SELECT
          COUNT(*) AS total,
          SUM(CASE WHEN verdict = 'FBA' THEN 1 ELSE 0 END) AS fba,
          SUM(CASE WHEN verdict = 'FBM' THEN 1 ELSE 0 END) AS fbm,
          SUM(CASE WHEN verdict = 'SKIP' THEN 1 ELSE 0 END) AS skip
        FROM results
        WHERE run_id = ?`,
      )
      .get(runId) as {
      total: number;
      fba: number | null;
      fbm: number | null;
      skip: number | null;
    };

    db.query(
      `UPDATE runs
       SET total_products = ?, fba_count = ?, fbm_count = ?, skip_count = ?
       WHERE id = ?`,
    ).run(
      stats.total ?? 0,
      stats.fba ?? 0,
      stats.fbm ?? 0,
      stats.skip ?? 0,
      runId,
    );
    return;
  }

  const stats = db
    .query(
      `SELECT
        COUNT(*) AS available,
        SUM(CASE WHEN verdict = 'FBA' THEN 1 ELSE 0 END) AS fba,
        SUM(CASE WHEN verdict = 'FBM' THEN 1 ELSE 0 END) AS fbm,
        SUM(CASE WHEN verdict = 'SKIP' THEN 1 ELSE 0 END) AS skip
      FROM product_analysis_results
      WHERE run_id = ?`,
    )
    .get(runId) as {
    available: number;
    fba: number | null;
    fbm: number | null;
    skip: number | null;
  };

  db.query(
    `UPDATE category_analysis_runs
     SET available_asins = ?, fba_count = ?, fbm_count = ?, skip_count = ?
     WHERE id = ?`,
  ).run(
    stats.available ?? 0,
    stats.fba ?? 0,
    stats.fbm ?? 0,
    stats.skip ?? 0,
    runId,
  );
}

async function reanalyzeSingleAsin(
  processType: ProcessType,
  runId: number,
  asin: string,
): Promise<{
  asin: string;
  runId: number;
  processType: ProcessType;
  fetchedAt: string;
}> {
  const row = getReanalyzeSourceRow(processType, runId, asin);
  if (!row) {
    throw new Error("Result row not found");
  }

  const productRecord = toProductRecord(row);

  let keepa = null;
  try {
    const keepaMap = await fetchKeepaDataBatch([asin]);
    keepa = keepaMap.get(asin) ?? null;
  } catch {
    keepa = null;
  }

  const sellabilityMap = await fetchSellabilityBatch([asin]);
  const sellability = sellabilityMap.get(asin) ?? {
    canSell: null,
    sellabilityStatus: "unknown" as const,
    sellabilityReason: "Sellability check returned no result",
  };
  const spApi = await fetchSpApiPricingAndFees(asin, sellability);

  if (keepa?.currentPrice && spApi.estimatedSalePrice === 0) {
    spApi.estimatedSalePrice = keepa.currentPrice;
  }

  const enriched: EnrichedProduct = {
    record: productRecord,
    keepa,
    spApi: spApi ?? unknownSpApiData(),
    fetchedAt: new Date().toISOString(),
  };

  const verdicts = await analyzeProducts([enriched]);
  const verdict = verdicts[0] ?? {
    asin,
    verdict: "SKIP" as const,
    confidence: 0,
    reasoning: "LLM analysis returned no verdict",
  };

  const amazonIsSeller =
    keepa?.amazonIsSeller == null ? null : keepa.amazonIsSeller ? 1 : 0;
  const fetchedAt = enriched.fetchedAt;

  if (processType === "lead_analysis") {
    db.query(
      `UPDATE results SET
        current_price = ?,
        avg_price_90d = ?,
        sales_rank = ?,
        rank_avg_90d = ?,
        sellers = ?,
        amazon_is_seller = ?,
        amazon_buybox_share_pct_90d = ?,
        monthly_sold = ?,
        rank_drops_30d = ?,
        rank_drops_90d = ?,
        fba_fee = ?,
        fbm_fee = ?,
        referral_percent = ?,
        can_sell = ?,
        sellability_status = ?,
        sellability_reason = ?,
        verdict = ?,
        confidence = ?,
        reasoning = ?,
        fetched_at = ?
      WHERE run_id = ? AND asin = ?`,
    ).run(
      keepa?.currentPrice ?? null,
      keepa?.avgPrice90 ?? null,
      keepa?.salesRank ?? row.sales_rank ?? null,
      keepa?.salesRankAvg90 ?? null,
      keepa?.sellerCount ?? null,
      amazonIsSeller,
      keepa?.amazonBuyboxSharePct90d ?? null,
      keepa?.monthlySold ?? null,
      keepa?.salesRankDrops30 ?? null,
      keepa?.salesRankDrops90 ?? null,
      spApi.fbaFee,
      spApi.fbmFee,
      spApi.referralFeePercent,
      spApi.canSell == null ? null : spApi.canSell ? 1 : 0,
      spApi.sellabilityStatus,
      spApi.sellabilityReason ?? null,
      verdict.verdict,
      verdict.confidence,
      verdict.reasoning,
      fetchedAt,
      runId,
      asin,
    );
  } else {
    db.query(
      `UPDATE product_analysis_results SET
        current_price = ?,
        avg_price_90d = ?,
        sales_rank = ?,
        sales_rank_avg_90d = ?,
        seller_count = ?,
        amazon_is_seller = ?,
        amazon_buybox_share_pct_90d = ?,
        monthly_sold = ?,
        rank_drops_30d = ?,
        rank_drops_90d = ?,
        fba_fee = ?,
        fbm_fee = ?,
        referral_percent = ?,
        can_sell = ?,
        sellability_status = ?,
        sellability_reason = ?,
        verdict = ?,
        confidence = ?,
        reasoning = ?,
        fetched_at = ?
      WHERE run_id = ? AND asin = ?`,
    ).run(
      keepa?.currentPrice ?? null,
      keepa?.avgPrice90 ?? null,
      keepa?.salesRank ?? row.sales_rank ?? null,
      keepa?.salesRankAvg90 ?? null,
      keepa?.sellerCount ?? null,
      amazonIsSeller,
      keepa?.amazonBuyboxSharePct90d ?? null,
      keepa?.monthlySold ?? null,
      keepa?.salesRankDrops30 ?? null,
      keepa?.salesRankDrops90 ?? null,
      spApi.fbaFee,
      spApi.fbmFee,
      spApi.referralFeePercent,
      spApi.canSell == null ? null : spApi.canSell ? 1 : 0,
      spApi.sellabilityStatus,
      spApi.sellabilityReason ?? null,
      verdict.verdict,
      verdict.confidence,
      verdict.reasoning,
      fetchedAt,
      runId,
      asin,
    );
  }

  refreshRunCounts(processType, runId);

  return { asin, runId, processType, fetchedAt };
}

const server = Bun.serve({
  port: Number(process.env.PORT || "3000"),
  routes: {
    "/": index,
    "/products": index,
    "/runs/:processType/:runId": index,
    "/api/runs": (req) => {
      const url = new URL(req.url);
      return json(getRuns(url.searchParams));
    },
    "/api/products": (req) => {
      const url = new URL(req.url);
      return json(getProductList(url.searchParams));
    },
    "/api/runs/:processType/:runId": (req) => {
      const processType = req.params.processType as ProcessType;
      const runId = Number(req.params.runId);

      if (
        !(
          processType === "lead_analysis" || processType === "category_analysis"
        ) ||
        !Number.isInteger(runId)
      ) {
        return json({ error: "Invalid run identifier" }, 400);
      }

      if (req.method === "DELETE") {
        const deleted = deleteRun(processType, runId);
        if (!deleted.deletedRun) return json({ error: "Run not found" }, 404);
        return json(deleted);
      }

      const run = getRun(processType, runId);
      if (!run) return json({ error: "Run not found" }, 404);

      const summary = {
        totalProducts: (run as { totalProducts: number }).totalProducts,
        fbaCount: (run as { fbaCount: number }).fbaCount,
        fbmCount: (run as { fbmCount: number }).fbmCount,
        skipCount: (run as { skipCount: number }).skipCount,
      };

      return json({ processType, ...run, summary });
    },
    "/api/runs/:processType/:runId/results": (req) => {
      const processType = req.params.processType as ProcessType;
      const runId = Number(req.params.runId);

      if (
        !(
          processType === "lead_analysis" || processType === "category_analysis"
        ) ||
        !Number.isInteger(runId)
      ) {
        return json({ error: "Invalid run identifier" }, 400);
      }

      const url = new URL(req.url);
      const payload = getRunResults(processType, runId, url.searchParams);
      return json(payload);
    },
    "/api/runs/:processType/:runId/asins/:asin/reanalyze": async (req) => {
      const processType = req.params.processType as ProcessType;
      const runId = Number(req.params.runId);
      const asin = normalizeAsin(req.params.asin);

      if (
        !(
          processType === "lead_analysis" || processType === "category_analysis"
        ) ||
        !Number.isInteger(runId)
      ) {
        return json({ error: "Invalid run identifier" }, 400);
      }

      if (req.method !== "POST") {
        return json({ error: "Method not allowed" }, 405);
      }

      if (!isValidAsin(asin)) {
        return json({ error: "Invalid ASIN" }, 400);
      }

      try {
        const result = await reanalyzeSingleAsin(processType, runId, asin);
        return json(result);
      } catch (err) {
        const message = err instanceof Error ? err.message : String(err);
        if (message === "Result row not found") {
          return json({ error: message }, 404);
        }
        return json({ error: message }, 500);
      }
    },
    "/api/runs/:processType/:runId/export.csv": (req) => {
      const processType = req.params.processType as ProcessType;
      const runId = Number(req.params.runId);

      if (
        !(
          processType === "lead_analysis" || processType === "category_analysis"
        ) ||
        !Number.isInteger(runId)
      ) {
        return json({ error: "Invalid run identifier" }, 400);
      }

      const url = new URL(req.url);
      const csvText = exportRunResultsCsv(processType, runId, url.searchParams);
      return csv(csvText, `run-${processType}-${runId}.csv`);
    },
  },
  fetch() {
    return json({ error: "Not found" }, 404);
  },
  development: {
    hmr: true,
    console: true,
  },
});

console.log(`Results viewer running on http://localhost:${server.port}`);