import { PlatformTools } from "../../platform/PlatformTools";
import { OrmUtils } from "../../util/OrmUtils";
/**
 * Reads connection options from environment variables.
 * Environment variables can have only a single connection.
 * Its strongly required to define TYPEORM_CONNECTION env variable.
 */
export class ConnectionOptionsEnvReader {
    // -------------------------------------------------------------------------
    // Public Methods
    // -------------------------------------------------------------------------
    /**
     * Reads connection options from environment variables.
     */
    async read() {
        return [{
                type: PlatformTools.getEnvVariable("TYPEORM_CONNECTION") || (PlatformTools.getEnvVariable("TYPEORM_URL") ? PlatformTools.getEnvVariable("TYPEORM_URL").split("://")[0] : undefined),
                url: PlatformTools.getEnvVariable("TYPEORM_URL"),
                host: PlatformTools.getEnvVariable("TYPEORM_HOST"),
                port: this.stringToNumber(PlatformTools.getEnvVariable("TYPEORM_PORT")),
                username: PlatformTools.getEnvVariable("TYPEORM_USERNAME"),
                password: PlatformTools.getEnvVariable("TYPEORM_PASSWORD"),
                database: PlatformTools.getEnvVariable("TYPEORM_DATABASE"),
                sid: PlatformTools.getEnvVariable("TYPEORM_SID"),
                schema: PlatformTools.getEnvVariable("TYPEORM_SCHEMA"),
                extra: PlatformTools.getEnvVariable("TYPEORM_DRIVER_EXTRA") ? JSON.parse(PlatformTools.getEnvVariable("TYPEORM_DRIVER_EXTRA")) : undefined,
                synchronize: OrmUtils.toBoolean(PlatformTools.getEnvVariable("TYPEORM_SYNCHRONIZE")),
                dropSchema: OrmUtils.toBoolean(PlatformTools.getEnvVariable("TYPEORM_DROP_SCHEMA")),
                migrationsRun: OrmUtils.toBoolean(PlatformTools.getEnvVariable("TYPEORM_MIGRATIONS_RUN")),
                entities: this.stringToArray(PlatformTools.getEnvVariable("TYPEORM_ENTITIES")),
                migrations: this.stringToArray(PlatformTools.getEnvVariable("TYPEORM_MIGRATIONS")),
                migrationsTableName: PlatformTools.getEnvVariable("TYPEORM_MIGRATIONS_TABLE_NAME"),
                metadataTableName: PlatformTools.getEnvVariable("TYPEORM_METADATA_TABLE_NAME"),
                subscribers: this.stringToArray(PlatformTools.getEnvVariable("TYPEORM_SUBSCRIBERS")),
                logging: this.transformLogging(PlatformTools.getEnvVariable("TYPEORM_LOGGING")),
                logger: PlatformTools.getEnvVariable("TYPEORM_LOGGER"),
                entityPrefix: PlatformTools.getEnvVariable("TYPEORM_ENTITY_PREFIX"),
                maxQueryExecutionTime: PlatformTools.getEnvVariable("TYPEORM_MAX_QUERY_EXECUTION_TIME"),
                debug: PlatformTools.getEnvVariable("TYPEORM_DEBUG"),
                cli: {
                    entitiesDir: PlatformTools.getEnvVariable("TYPEORM_ENTITIES_DIR"),
                    migrationsDir: PlatformTools.getEnvVariable("TYPEORM_MIGRATIONS_DIR"),
                    subscribersDir: PlatformTools.getEnvVariable("TYPEORM_SUBSCRIBERS_DIR"),
                },
                cache: this.transformCaching(),
                uuidExtension: PlatformTools.getEnvVariable("TYPEORM_UUID_EXTENSION")
            }];
    }
    // -------------------------------------------------------------------------
    // Protected Methods
    // -------------------------------------------------------------------------
    /**
     * Transforms logging string into real logging value connection requires.
     */
    transformLogging(logging) {
        if (logging === "true" || logging === "TRUE" || logging === "1")
            return true;
        if (logging === "all")
            return "all";
        return this.stringToArray(logging);
    }
    /**
     * Transforms caching option into real caching value option requires.
     */
    transformCaching() {
        const caching = PlatformTools.getEnvVariable("TYPEORM_CACHE");
        if (caching === "true" || caching === "TRUE" || caching === "1")
            return true;
        if (caching === "false" || caching === "FALSE" || caching === "0")
            return false;
        if (caching === "redis" || caching === "ioredis" || caching === "database")
            return {
                type: caching,
                options: PlatformTools.getEnvVariable("TYPEORM_CACHE_OPTIONS") ? JSON.parse(PlatformTools.getEnvVariable("TYPEORM_CACHE_OPTIONS")) : undefined,
                alwaysEnabled: PlatformTools.getEnvVariable("TYPEORM_CACHE_ALWAYS_ENABLED"),
                duration: parseInt(PlatformTools.getEnvVariable("TYPEORM_CACHE_DURATION"))
            };
        return undefined;
    }
    /**
     * Converts a string which contains multiple elements split by comma into a string array of strings.
     */
    stringToArray(variable) {
        if (!variable)
            return [];
        return variable.split(",").map(str => str.trim());
    }
    /**
     * Converts a string which contains a number into a javascript number
     */
    stringToNumber(value) {
        if (!value) {
            return undefined;
        }
        return parseInt(value);
    }
}

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