import createConnectionPool, { ConnectionPool, sql } from '@databases/pg'
import sqlite3 from 'better-sqlite3'
import { PythonShell } from 'python-shell'

export async function main(db: ConnectionPool) {
  const s3 = sqlite3('./assets/radical.db')

  const rows = s3
    .prepare(
      /* sql */ `
  SELECT "entry", "sub", "sup", "var" FROM "radical"
  `
    )
    .all()

  const fPrev = new Set<string>(
    await db
      .query(
        sql`
        SELECT "entry" FROM "frequency"
        `
      )
      .then((rs) => rs.map((r) => r.entry))
  )

  const py = new PythonShell('./scripts/freq.py', {
    mode: 'text',
    pythonOptions: ['-u'],
  })

  const fMap = new Map<string, number>()
  py.on('message', (msg: string) => {
    const [w = '', f] = msg.split('=')
    fMap.set(w, Number(f))
  })
  ;[
    ...new Set(
      rows.flatMap((r) =>
        [
          ...((r.entry + r.sub + r.sup + r.var) as string).matchAll(
            /\p{sc=Han}/gu
          ),
        ].map((m) => m[0]!)
      )
    ),
  ]
    .filter((v) => !fPrev.has(v))
    .map((v) => py.send(v))

  await new Promise<void>((resolve, reject) => {
    py.end((err) => (err ? reject(err) : resolve()))
  })

  const batchSize = 5000

  if (fMap.size) {
    const fRow = [...fMap]
    for (let i = 0; i < fRow.length; i += batchSize) {
      console.log(i)

      await db.query(sql`
      INSERT INTO "frequency" ("entry", "frequency")
      VALUES ${sql.join(
        fRow.slice(i, i + batchSize).map(([k, v]) => sql`(${k}, ${v})`),
        ','
      )}
      ON CONFLICT ("entry")
      DO UPDATE SET "frequency" = EXCLUDED."frequency";
      `)
    }
  }

  for (let i = 0; i < rows.length; i += batchSize) {
    console.log(i)
    const sublot = rows.slice(i, i + batchSize)

    await db.query(sql`
    INSERT INTO "character" ("entry", "sub", "sup", "var")
    VALUES ${sql.join(
      sublot.map((r) => {
        return sql`(${r.entry}, ${[
          ...(r.sub as string).matchAll(/\p{sc=Han}/gu),
        ].map((m) => m[0]!)}, ${[
          ...(r.sup as string).matchAll(/\p{sc=Han}/gu),
        ].map((m) => m[0]!)}, ${[
          ...(r.var as string).matchAll(/\p{sc=Han}/gu),
        ].map((m) => m[0]!)})`
      }),
      ','
    )}
    ON CONFLICT DO NOTHING;
    `)
  }
}

if (require.main === module) {
  main(createConnectionPool({ bigIntMode: 'number' }))
}