import {
  APIErrorCode,
  APIException,
  type CreateDumpRequest,
  type Dump,
  type UpdateDumpRequest,
} from "../model/interfaces.ts";
import { db, dumpApiToRow, dumpRowToApi, isDumpRow } from "../model/db.ts";

export function createDump(
  request: CreateDumpRequest,
  userId: string,
): Dump {
  const dumpId = crypto.randomUUID();
  const createdAt = new Date();

  db.prepare(
    `INSERT INTO dumps (id, title, description, user_id, created_at)
      VALUES (?, ?, ?, ?, ?);`,
  ).run(
    dumpId,
    request.title,
    request.description ?? null,
    userId,
    createdAt.toISOString(),
  );

  return {
    id: dumpId,
    title: request.title,
    description: request.description ?? undefined,
    userId: userId,
    createdAt,
  };
}

export function getDump(dumpId: string): Dump {
  const dumpRow = db.prepare(
    `SELECT id, title, description, user_id, created_at
      FROM dumps WHERE id = ?;`,
  ).get(dumpId);

  if (!dumpRow || !isDumpRow(dumpRow)) {
    throw new APIException(APIErrorCode.NOT_FOUND, 404, "Dump not found");
  }

  return dumpRowToApi(dumpRow);
}

export function listDumps(): Dump[] {
  const dumpRows = db.prepare(
    `SELECT id, title, description, user_id, created_at FROM dumps;`,
  ).all();

  if (!dumpRows || !dumpRows.every(isDumpRow)) {
    throw new APIException(APIErrorCode.NOT_FOUND, 404, "No dump found");
  }

  const dumps: Dump[] = dumpRows.map(dumpRowToApi);

  return dumps;
}

export function updateDump(
  dumpId: string,
  request: UpdateDumpRequest,
): Dump {
  const dump = getDump(dumpId);

  const updatedDump = {
    ...dump,
    ...request,
  };
  const updatedDumpRow = dumpApiToRow(updatedDump);

  const dumpResult = db.prepare(
    `UPDATE dumps SET title = ?, description = ? WHERE id = ?;`,
  ).run(
    updatedDumpRow.title,
    updatedDumpRow.description,
    updatedDumpRow.id,
  );

  if (dumpResult.changes === 0) {
    throw new APIException(APIErrorCode.NOT_FOUND, 404, "Dump not found");
  }

  return updatedDump;
}

export function deleteDump(dumpId: string): void {
  const result = db.prepare(
    `DELETE FROM dumps WHERE id = ?;`,
  ).run(dumpId);

  if (result.changes === 0) {
    throw new APIException(APIErrorCode.NOT_FOUND, 404, "Dump not found");
  }
}