import { CREATE_LINE as MSSQL_CREATE_LINE } from '../providers/mssql/queries/manifestDoc.js';
import { CREATE_LINE as SQLITE_CREATE_LINE } from '../providers/sqlite3/queries/manifestDoc.js';
import makeRunner from './runner.js';

/**
 * Normalizes and validates an array of manifest line inputs.
 *
 * @param {Array<object>} lines - The raw line inputs.
 * @returns {Array<{sku: string|null, name: string|null, pu: number, amount: number, net: number, rebate: number, taxrate: number, comment: string|null}>} The normalized lines.
 * @throws {Error} If the lines are invalid.
 */
export function normalizeLines(lines) {
  if (!Array.isArray(lines)) {
    throw new Error('Invalid lines');
  }

  return lines.map((entry) => {
    const sku = entry?.sku?.trim?.() ? entry.sku.trim() : null;
    const name = entry?.name?.trim?.() ? entry.name.trim() : null;

    // Must have either an SKU or a name.
    if (!sku && !name) {
      throw new Error('Invalid lines');
    }

    const pu =
      entry?.pu === undefined || entry?.pu === null ? 1 : entry.pu;
    const amount = entry?.amount;
    const net = entry?.net;
    const rebate =
      entry?.rebate === undefined || entry?.rebate === null ? 0 : entry.rebate;
    const taxrate = entry?.taxrate;
    const comment =
      entry?.comment === undefined || entry?.comment === null
        ? null
        : String(entry.comment);

    if (
      !Number.isFinite(pu) ||
      !Number.isFinite(amount) ||
      !Number.isFinite(net) ||
      !Number.isFinite(rebate) ||
      !Number.isFinite(taxrate)
    ) {
      throw new Error('Invalid lines');
    }

    return { sku, name, pu, amount, net, rebate, taxrate, comment };
  });
}

/**
 * Parses a date value (Date instance or ISO string) into a Date.
 *
 * @param {Date|string} value - The date value.
 * @returns {Date|null} The parsed date, or null if invalid.
 */
export function parseDate(value) {
  if (value instanceof Date && !Number.isNaN(value.getTime())) {
    return value;
  }
  if (typeof value === 'string' && value.trim()) {
    const d = new Date(value);
    if (!Number.isNaN(d.getTime())) {
      return d;
    }
  }
  return null;
}

/**
 * Shapes a manifestarticle row into a line object.
 *
 * @param {object} row - The manifestarticle row.
 * @returns {object} The shaped line.
 */
export function shapeLine(row) {
  const taxrate = Number(row.taxrate);
  return {
    id: row.id,
    sku: row.sku ?? null,
    name: row.name ?? null,
    pu: row.pu !== undefined && row.pu !== null ? Number(row.pu) : 1,
    amount: row.amount,
    net: row.net,
    rebate: row.rebate,
    taxrate,
    comment: row.comment ?? null,
  };
}

/**
 * Inserts manifest lines for a document, storing each SKU and taxrate directly,
 * and ensuring the tax rate exists in the tax catalog.
 *
 * @param {object} runnerOrPool - The runner or mssql connection pool.
 * @param {object} txOrParams - The transaction or params object.
 * @param {object} [maybeParams] - The insert parameters.
 * @returns {Promise<void>}
 */
export async function insertLines(
  runnerOrPool,
  txOrParams,
  maybeParams,
) {
  let runner;
  let params;
  if (maybeParams !== undefined) {
    runner = makeRunner(runnerOrPool, txOrParams);
    params = maybeParams;
  } else {
    runner = makeRunner(runnerOrPool);
    params = txOrParams;
  }

  const { manifestId, lines, ensureTax } = params;
  const isSqlite = runner?.dialect === 'sqlite3';
  const createLineSql = isSqlite ? SQLITE_CREATE_LINE : MSSQL_CREATE_LINE;

  for (const line of lines) {
    if (ensureTax) {
      await ensureTax(line.taxrate, runner);
    }

    await runner.query(createLineSql, {
      manifestId,
      sku: line.sku ?? null,
      name: line.name ?? null,
      pu: line.pu ?? 1,
      amount: line.amount,
      net: line.net,
      comment: line.comment,
      rebate: line.rebate,
      taxrate: line.taxrate,
    });
  }
}