import { QueryRunnerAlreadyReleasedError } from "../../error/QueryRunnerAlreadyReleasedError";
import { QueryFailedError } from "../../error/QueryFailedError";
import { AbstractSqliteQueryRunner } from "../sqlite-abstract/AbstractSqliteQueryRunner";
import { Broadcaster } from "../../subscriber/Broadcaster";
import { ConnectionIsNotSetError } from "../../error/ConnectionIsNotSetError";
import { QueryResult } from "../../query-runner/QueryResult";
/**
 * Runs queries on a single sqlite database connection.
 *
 * Does not support compose primary keys with autoincrement field.
 * todo: need to throw exception for this case.
 */
export class SqliteQueryRunner extends AbstractSqliteQueryRunner {
    // -------------------------------------------------------------------------
    // Constructor
    // -------------------------------------------------------------------------
    constructor(driver) {
        super();
        this.driver = driver;
        this.connection = driver.connection;
        this.broadcaster = new Broadcaster(this);
    }
    /**
     * Called before migrations are run.
     */
    async beforeMigration() {
        await this.query(`PRAGMA foreign_keys = OFF`);
    }
    /**
     * Called after migrations are run.
     */
    async afterMigration() {
        await this.query(`PRAGMA foreign_keys = ON`);
    }
    /**
     * Executes a given SQL query.
     */
    query(query, parameters, useStructuredResult = false) {
        if (this.isReleased)
            throw new QueryRunnerAlreadyReleasedError();
        const connection = this.driver.connection;
        const options = connection.options;
        const maxQueryExecutionTime = this.driver.options.maxQueryExecutionTime;
        if (!connection.isInitialized) {
            throw new ConnectionIsNotSetError("sqlite");
        }
        return new Promise(async (ok, fail) => {
            const databaseConnection = await this.connect();
            this.driver.connection.logger.logQuery(query, parameters, this);
            const queryStartTime = +new Date();
            const isInsertQuery = query.startsWith("INSERT ");
            const isDeleteQuery = query.startsWith("DELETE ");
            const isUpdateQuery = query.startsWith("UPDATE ");
            const execute = async () => {
                if (isInsertQuery || isDeleteQuery || isUpdateQuery) {
                    await databaseConnection.run(query, parameters, handler);
                }
                else {
                    await databaseConnection.all(query, parameters, handler);
                }
            };
            const handler = function (err, rows) {
                if (err && err.toString().indexOf("SQLITE_BUSY:") !== -1) {
                    if (typeof options.busyErrorRetry === "number" &&
                        options.busyErrorRetry > 0) {
                        setTimeout(execute, options.busyErrorRetry);
                        return;
                    }
                }
                // log slow queries if maxQueryExecution time is set
                const queryEndTime = +new Date();
                const queryExecutionTime = queryEndTime - queryStartTime;
                if (maxQueryExecutionTime &&
                    queryExecutionTime > maxQueryExecutionTime)
                    connection.logger.logQuerySlow(queryExecutionTime, query, parameters, this);
                if (err) {
                    connection.logger.logQueryError(err, query, parameters, this);
                    fail(new QueryFailedError(query, parameters, err));
                }
                else {
                    const result = new QueryResult();
                    if (isInsertQuery) {
                        result.raw = this["lastID"];
                    }
                    else {
                        result.raw = rows;
                    }
                    if (Array.isArray(rows)) {
                        result.records = rows;
                    }
                    result.affected = this["changes"];
                    if (useStructuredResult) {
                        ok(result);
                    }
                    else {
                        ok(result.raw);
                    }
                }
            };
            await execute();
        });
    }
}

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