import {
  DELETE_BY_ARTICLE_ID as MSSQL_DELETE,
  INSERT_ROW as MSSQL_INSERT,
} from '../../providers/mssql/queries/articleproperty.js';
import {
  DELETE_BY_ARTICLE_ID as SQLITE_DELETE,
  INSERT_ROW as SQLITE_INSERT,
} from '../../providers/sqlite3/queries/articleproperty.js';
import {
  GET_BY_COMPANY_AND_ID as MSSQL_GET_PROP,
} from '../../providers/mssql/queries/propertyname.js';
import {
  GET_BY_COMPANY_AND_ID as SQLITE_GET_PROP,
} from '../../providers/sqlite3/queries/propertyname.js';
import {
  TOUCH_UPDATED_AT as MSSQL_TOUCH,
  ENQUEUE_SYNC_BY_ARTICLE as MSSQL_ENQUEUE_SYNC,
} from '../../providers/mssql/queries/article.js';
import {
  TOUCH_UPDATED_AT as SQLITE_TOUCH,
  ENQUEUE_SYNC_BY_ARTICLE as SQLITE_ENQUEUE_SYNC,
} from '../../providers/sqlite3/queries/article.js';
import resolveArticleBySku from '../article/resolveArticleBySku.js';
import { recordPropertyChangeHistory } from '../articlehistory/record.js';
import makeRunner from '../runner.js';

export default function setByArticleSku(provider) {
  const resolve = resolveArticleBySku(provider);
  const isSqlite = provider?.dialect === 'sqlite3';
  const deleteSql = isSqlite ? SQLITE_DELETE : MSSQL_DELETE;
  const insertSql = isSqlite ? SQLITE_INSERT : MSSQL_INSERT;
  const getPropSql = isSqlite ? SQLITE_GET_PROP : MSSQL_GET_PROP;
  const touchArticleSql = isSqlite ? SQLITE_TOUCH : MSSQL_TOUCH;
  const enqueueSyncSql = isSqlite ? SQLITE_ENQUEUE_SYNC : MSSQL_ENQUEUE_SYNC;

  /**
   * Replaces all properties for an article by its SKU.
   * Enforces exclusive flag on property names. An exclusive property that already has a value
   * is never overwritten: a different value throws `Exclusive property cannot be overwritten: <name>`.
   *
   * @param {number} googleAuthId - The id of the Google auth user.
   * @param {string} sku - The article SKU.
   * @param {Array<{propertyId: number, value: string, sort?: number}>} properties - The properties to set.
   * @param {object} [tx] - Optional transaction.
   * @returns {Promise<Array<{id: number, articleId: number, propertyId: number, name: string, exclusive: boolean, value: string, sort: number}>>}
   */
  return async (googleAuthId, sku, properties = [], tx) => {
    if (!Array.isArray(properties)) {
      throw new Error('Invalid properties array');
    }

    const runSet = async (runner) => {
      const { articleId, companyId, companyuserId } = await resolve(googleAuthId, sku, runner);

      // Read old properties for history
      const oldPropsRes = await runner.query(
        `SELECT ap.property_id AS propertyId, pn.name, ap.value
         FROM articleproperty ap
         INNER JOIN propertyname pn ON pn.id = ap.property_id
         WHERE ap.article_id = @articleId
         ORDER BY ap.sort ASC, ap.id ASC`,
        { articleId },
      );
      const oldProps = oldPropsRes.rows;

      const validated = [];
      const seenExclusiveProps = new Set();

      for (let i = 0; i < properties.length; i++) {
        const item = properties[i];
        const propertyId = Number(item.propertyId);
        if (!Number.isInteger(propertyId) || propertyId <= 0) {
          throw new Error('Invalid propertyId');
        }

        const propRes = await runner.query(getPropSql, { id: propertyId, companyId });
        const prop = propRes.rows[0];
        if (!prop) {
          throw new Error(`Property not found: ${propertyId}`);
        }

        const isExclusive = Boolean(prop.exclusive);
        if (isExclusive) {
          if (seenExclusiveProps.has(propertyId)) {
            throw new Error(`Property "${prop.name}" is exclusive and can only have one value`);
          }
          seenExclusiveProps.add(propertyId);
        }

        const value = item.value != null ? String(item.value).trim() : '';
        if (isExclusive) {
          const existing = oldProps.find((p) => p.propertyId === propertyId);
          if (existing && existing.value !== '' && existing.value !== value) {
            throw new Error(`Exclusive property cannot be overwritten: ${prop.name}`);
          }
        }
        const sort = item.sort != null && Number.isInteger(item.sort) ? item.sort : i;
        validated.push({
          propertyId,
          name: prop.name,
          exclusive: isExclusive,
          value,
          sort,
        });
      }

      await runner.query(deleteSql, { articleId });

      const inserted = [];
      for (const item of validated) {
        const res = await runner.query(insertSql, {
          articleId,
          propertyId: item.propertyId,
          value: item.value,
          sort: item.sort,
        });
        const id = res.rows[0]?.id ?? res.insertId;
        inserted.push({
          id,
          articleId,
          propertyId: item.propertyId,
          name: item.name,
          exclusive: item.exclusive,
          value: item.value,
          sort: item.sort,
        });
      }

      // Write history if properties changed
      await recordPropertyChangeHistory(runner, {
        articleId,
        companyuserId,
        oldProps,
        newProps: validated,
      });

      await runner.query(touchArticleSql, { articleId });
      await runner.query(enqueueSyncSql, { articleId });

      return inserted;
    };

    if (tx) {
      return runSet(makeRunner(provider, tx));
    }
    if (typeof provider?.transaction === 'function') {
      return provider.transaction(runSet);
    }
    return runSet(makeRunner(provider));
  };
}