import Hostname from 'Common/Types/API/Hostname';
import URL from 'Common/Types/API/URL';
import { LIMIT_PER_PROJECT } from 'Common/Types/Database/LimitMax';
import Dictionary from 'Common/Types/Dictionary';
import { PromiseVoidFunction } from 'Common/Types/FunctionTypes';
import IP from 'Common/Types/IP/IP';
import { JSONObject } from 'Common/Types/JSON';
import JSONFunctions from 'Common/Types/JSONFunctions';
import MonitorType from 'Common/Types/Monitor/MonitorType';
import MonitorSecretService from 'CommonServer/Services/MonitorSecretService';
import QueryHelper from 'CommonServer/Types/Database/QueryHelper';
import VMUtil from 'CommonServer/Utils/VM/VMAPI';
import Monitor from 'Model/Models/Monitor';
import MonitorSecret from 'Model/Models/MonitorSecret';

export default class MonitorUtil {
    public static async populateSecrets(monitor: Monitor): Promise<Monitor> {
        const isSecretsLoaded: boolean = false;
        let monitorSecrets: MonitorSecret[] = [];

        const loadSecrets: PromiseVoidFunction = async (): Promise<void> => {
            if (isSecretsLoaded) {
                return;
            }

            if (!monitor.id) {
                return;
            }

            const secrets: Array<MonitorSecret> =
                await MonitorSecretService.findBy({
                    query: {
                        monitors: QueryHelper.in([monitor.id]),
                    },
                    select: {
                        secretValue: true,
                        name: true,
                    },
                    limit: LIMIT_PER_PROJECT,
                    skip: 0,
                    props: {
                        isRoot: true,
                    },
                });

            monitorSecrets = secrets;
        };

        if (!monitor.monitorSteps) {
            return monitor;
        }

        if (monitor.monitorType === MonitorType.API) {
            for (const monitorStep of monitor.monitorSteps?.data
                ?.monitorStepsInstanceArray || []) {
                if (
                    monitorStep.data?.requestHeaders &&
                    this.hasSecrets(
                        JSONFunctions.toString(monitorStep.data.requestHeaders)
                    )
                ) {
                    await loadSecrets();

                    monitorStep.data.requestHeaders =
                        (await MonitorUtil.fillSecretsInStringOrJSON({
                            secrets: monitorSecrets,
                            populateSecretsIn: monitorStep.data.requestHeaders,
                        })) as Dictionary<string>;
                } else if (
                    monitorStep.data?.requestBody &&
                    this.hasSecrets(
                        JSONFunctions.toString(monitorStep.data.requestBody)
                    )
                ) {
                    await loadSecrets();

                    monitorStep.data.requestBody =
                        (await MonitorUtil.fillSecretsInStringOrJSON({
                            secrets: monitorSecrets,
                            populateSecretsIn: monitorStep.data.requestBody,
                        })) as string;
                }
            }
        }

        if (
            monitor.monitorType === MonitorType.API ||
            monitor.monitorType === MonitorType.IP ||
            monitor.monitorType === MonitorType.Ping ||
            monitor.monitorType === MonitorType.Port ||
            monitor.monitorType === MonitorType.Website ||
            monitor.monitorType === MonitorType.SSLCertificate
        ) {
            for (const monitorStep of monitor.monitorSteps?.data
                ?.monitorStepsInstanceArray || []) {
                if (
                    monitorStep.data?.monitorDestination &&
                    this.hasSecrets(
                        JSONFunctions.toString(
                            monitorStep.data.monitorDestination
                        )
                    )
                ) {
                    // replace secret in monitorDestination.
                    await loadSecrets();

                    monitorStep.data.monitorDestination =
                        (await MonitorUtil.fillSecretsInStringOrJSON({
                            secrets: monitorSecrets,
                            populateSecretsIn:
                                monitorStep.data.monitorDestination,
                        })) as URL | Hostname | IP;
                }
            }
        }

        if (
            monitor.monitorType === MonitorType.SyntheticMonitor ||
            monitor.monitorType === MonitorType.CustomJavaScriptCode
        ) {
            for (const monitorStep of monitor.monitorSteps?.data
                ?.monitorStepsInstanceArray || []) {
                if (
                    monitorStep.data?.customCode &&
                    this.hasSecrets(
                        JSONFunctions.toString(monitorStep.data.customCode)
                    )
                ) {
                    // replace secret in script
                    await loadSecrets();

                    monitorStep.data.customCode =
                        (await MonitorUtil.fillSecretsInStringOrJSON({
                            secrets: monitorSecrets,
                            populateSecretsIn: monitorStep.data.customCode,
                        })) as string;
                }
            }
        }

        return monitor;
    }

    private static hasSecrets(prepopulatedString: string): boolean {
        return prepopulatedString.includes('monitorSecrets.');
    }

    private static async fillSecretsInStringOrJSON(data: {
        secrets: MonitorSecret[];
        populateSecretsIn: string | JSONObject | URL | Hostname | IP;
    }): Promise<string | JSONObject | URL | Hostname | IP> {
        // get all secrets for this monitor.

        const secrets: MonitorSecret[] = data.secrets;

        if (secrets.length === 0) {
            return data.populateSecretsIn;
        }

        // replace all secrets in the populateSecretsIn

        const storageMap: JSONObject = {
            monitorSecrets: {},
        };

        for (const monitorSecret of secrets) {
            if (!monitorSecret.name) {
                continue;
            }

            if (!monitorSecret.secretValue) {
                continue;
            }

            (storageMap['monitorSecrets'] as JSONObject)[
                monitorSecret.name as string
            ] = monitorSecret.secretValue;
        }

        const isValueJSON: boolean = typeof data.populateSecretsIn === 'object';

        return VMUtil.replaceValueInPlace(
            storageMap,
            data.populateSecretsIn as string,
            isValueJSON
        );
    }
}