/* MIGRATION for updating transactions from the past to follow the blockchain rules */
/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
/* eslint-disable @typescript-eslint/no-explicit-any */

export async function upgrade(queryFn: (query: string, values?: any[]) => Promise<Array<any>>) {
  // split creation transaction with 3000 GDD created in one transaction what isn't allowed
  const transactionMemos: string[] = [
    'Aktives Grundeinkommen für GL. Dez',
    'Aktives Grundeinkommen für GL. Jan',
    'Aktives Grundeinkommen für GL. Feb',
  ]
  const creationDate = new Date('2020-03-30 06:59:55')

  await queryFn(`UPDATE \`transactions\` set \`amount\` = 1000, \`balance\` = 1000, \`memo\` = ? WHERE \`id\` = 150`, [
    transactionMemos[0],
  ])

  // [ RowDataPacket { 'MAX(`id`)': 6828 } ]
  const lastTransactionId = (await queryFn(`SELECT MAX(\`id\`) as max_id from \`transactions\``))[0].max_id
  // dummy id to insert two transactions before this (previous has an index on it)
  await queryFn(`UPDATE \`transactions\` set \`previous\` = ? WHERE \`id\` = 278`, [lastTransactionId + 30])
  
  await queryFn(
    `INSERT INTO \`transactions\`(
            \`user_id\`, \`previous\`, \`type_id\`, \`amount\`, \`balance\`,
            \`balance_date\`, \`decay\`, \`memo\`, \`creation_date\`
          ) VALUES(
            275, 150, 1, 1000, 2000,
            ?, 0, ?, ?
          )`,
    [creationDate, transactionMemos[1], creationDate],
  )
  await queryFn(
    `INSERT INTO \`transactions\`(
            \`user_id\`, \`previous\`, \`type_id\`, \`amount\`, \`balance\`,
            \`balance_date\`, \`decay\`, \`memo\`, \`creation_date\`
          ) VALUES(
            275, LAST_INSERT_ID(), 1, 1000, 3000,
            ?, 0, ?, ?
          )`,
    [creationDate, transactionMemos[2], creationDate],  
  )
  await queryFn(`UPDATE \`transactions\` set \`previous\` = LAST_INSERT_ID() WHERE \`id\` = 278`)

  // ----------------------------------------------------------------------------------------------
  // update creation_date for transactions with creation_date == balance_date
  // !cannot made be undone easily!

  // make copy of transaction_creations table for easy debugging workflow
  await queryFn(`DROP TABLE IF EXISTS \`transactions_temp\``)
  await queryFn(`CREATE TABLE \`transactions_temp\` LIKE transactions`)
  await queryFn(`INSERT INTO \`transactions_temp\` SELECT * FROM \`transactions\``)

  // update entries from which memo contain month name (most cases)
  interface ReplaceSet {
    monthName: string
    monthValue: number
    yearValue: number
  }
  const replaceSets: ReplaceSet[] = [
    { monthName: '%Dez%', monthValue: 12, yearValue: 2019 },
    { monthName: '%Jan%', monthValue: 1, yearValue: 2020 },
    { monthName: '%Feb%', monthValue: 2, yearValue: 2020 },
    { monthName: '%M_rz%', monthValue: 3, yearValue: 2020 },
    { monthName: '%April%', monthValue: 4, yearValue: 2020 },
  ]
  for(const replaceSet of replaceSets) {
    let sqlQuery = `update \`transactions_temp\` 
      SET \`creation_date\` = DATE_FORMAT(\`creation_date\`, CONCAT(?, '-', ?, '-', `
    if (replaceSet.monthName === '%Feb%') {
      sqlQuery += "IF(DATE_FORMAT(`creation_date`, '%d') <= 28, '%d', 28)"
    } else {
      sqlQuery += "'%d'"
    }
    sqlQuery += `, ' %H:%i:%s'))
      WHERE \`balance_date\` = \`creation_date\`
      AND \`type_id\` = 1
      AND \`memo\` LIKE ?`

      await queryFn(sqlQuery, [replaceSet.yearValue, replaceSet.monthValue, replaceSet.monthName])
  }

  // update entries without month name in memo, simply move creation_date 1 month before balance_date
  await queryFn(`UPDATE \`transactions_temp\` 
           set creation_date = CAST(DATE_FORMAT(creation_date, CONCAT(
           IF(DATE_FORMAT(creation_date, '%m') = 1, DATE_FORMAT(creation_date, '%Y') - 1, '%Y'),
           '-',
           IF(DATE_FORMAT(creation_date, '%m') = 1, 12, DATE_FORMAT(creation_date, '%m') - 1),
           '-',
           IF(DATE_FORMAT(creation_date, '%m') = 3, IF(DATE_FORMAT(creation_date, '%d') <= 28, '%d', 28), '%d'),
           ' %H:%i:%s')) AS DATETIME)
           WHERE balance_date = creation_date
  `)
}


export async function downgrade(queryFn: (query: string, values?: any[]) => Promise<Array<any>>) {
  
  // remove added transaction
  await queryFn(
    `DELETE FROM \`transactions\` 
     WHERE \`user_id\` = 275 AND \`balance\` IN (2000, 3000) AND \`amount\` = 1000`,
  )
  
  // rewind transaction to split
  await queryFn(
    `UPDATE \`transactions\` set \`amount\` = 3000, \`memo\` = 'Aktives Grundeinkommen für GL. Dez, Jan, Feb' 
     WHERE \`id\` = 150`,
  )
  
  await queryFn(`UPDATE \`transactions\` set \`previous\` = 150 WHERE \`id\` = 278`)
}