// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

import assert from 'assert';

import {
    AzureStorage, KeyVaultConfig, KubernetesClusterConfig, KubernetesClusterConfigAzure, KubernetesClusterConfigNFS,
    KubernetesStorageKind, KubernetesTrialConfig, KubernetesTrialConfigTemplate, NFSConfig, StorageConfig
} from '../kubernetesConfig';

export class FrameworkAttemptCompletionPolicy {
    public readonly minFailedTaskCount: number;
    public readonly minSucceededTaskCount: number;
    constructor(minFailedTaskCount: number, minSucceededTaskCount: number) {
        this.minFailedTaskCount = minFailedTaskCount;
        this.minSucceededTaskCount = minSucceededTaskCount;
    }
}

/**
 * Trial job configuration for FrameworkController
 */
export class FrameworkControllerTrialConfigTemplate extends KubernetesTrialConfigTemplate {
    public readonly frameworkAttemptCompletionPolicy: FrameworkAttemptCompletionPolicy;
    public readonly name: string;
    public readonly taskNum: number;
    constructor(name: string, taskNum: number, command: string, gpuNum: number,
        cpuNum: number, memoryMB: number, image: string,
        frameworkAttemptCompletionPolicy: FrameworkAttemptCompletionPolicy, privateRegistryFilePath?: string | undefined) {
        super(command, gpuNum, cpuNum, memoryMB, image, privateRegistryFilePath);
        this.frameworkAttemptCompletionPolicy = frameworkAttemptCompletionPolicy;
        this.name = name;
        this.taskNum = taskNum;
    }
}

export class FrameworkControllerTrialConfig extends KubernetesTrialConfig {
    public readonly taskRoles: FrameworkControllerTrialConfigTemplate[];
    public readonly codeDir: string;
    constructor(codeDir: string, taskRoles: FrameworkControllerTrialConfigTemplate[]) {
        super(codeDir);
        this.taskRoles = taskRoles;
        this.codeDir = codeDir;
    }
}

export class FrameworkControllerClusterConfig extends KubernetesClusterConfig {
    public readonly serviceAccountName: string;
    constructor(apiVersion: string, serviceAccountName: string, _configPath?: string, namespace?: string) {
        super(apiVersion, undefined, namespace);
        this.serviceAccountName = serviceAccountName;
    }
}

export class FrameworkControllerClusterConfigNFS extends KubernetesClusterConfigNFS {
    public readonly serviceAccountName: string;
    public readonly configPath?: string;
    constructor(
        serviceAccountName: string,
        apiVersion: string,
        nfs: NFSConfig,
        storage?: KubernetesStorageKind,
        namespace?: string,
        configPath?: string
    ) {
        super(apiVersion, nfs, storage, namespace);
        this.serviceAccountName = serviceAccountName;
        this.configPath = configPath
    }

    public static getInstance(jsonObject: object): FrameworkControllerClusterConfigNFS {
        const kubernetesClusterConfigObjectNFS: FrameworkControllerClusterConfigNFS = <FrameworkControllerClusterConfigNFS>jsonObject;
        assert(kubernetesClusterConfigObjectNFS !== undefined);

        return new FrameworkControllerClusterConfigNFS(
            kubernetesClusterConfigObjectNFS.serviceAccountName,
            kubernetesClusterConfigObjectNFS.apiVersion,
            kubernetesClusterConfigObjectNFS.nfs,
            kubernetesClusterConfigObjectNFS.storage,
            kubernetesClusterConfigObjectNFS.namespace
        );
    }
}

export class FrameworkControllerClusterConfigAzure extends KubernetesClusterConfigAzure {
    public readonly serviceAccountName: string;
    public readonly configPath?: string;

    constructor(
        serviceAccountName: string,
        apiVersion: string,
        keyVault: KeyVaultConfig,
        azureStorage: AzureStorage,
        storage?: KubernetesStorageKind,
        uploadRetryCount?: number,
        namespace?: string,
        configPath?: string
    ) {
        super(apiVersion, keyVault, azureStorage, storage, uploadRetryCount, namespace);
        this.serviceAccountName = serviceAccountName;
        this.configPath = configPath
    }

    public static getInstance(jsonObject: object): FrameworkControllerClusterConfigAzure {
        const kubernetesClusterConfigObjectAzure: FrameworkControllerClusterConfigAzure = <FrameworkControllerClusterConfigAzure>jsonObject;

        return new FrameworkControllerClusterConfigAzure(
            kubernetesClusterConfigObjectAzure.serviceAccountName,
            kubernetesClusterConfigObjectAzure.apiVersion,
            kubernetesClusterConfigObjectAzure.keyVault,
            kubernetesClusterConfigObjectAzure.azureStorage,
            kubernetesClusterConfigObjectAzure.storage,
            kubernetesClusterConfigObjectAzure.uploadRetryCount,
            kubernetesClusterConfigObjectAzure.namespace
        );
    }
}

export class FrameworkControllerClusterConfigFactory {

    public static generateFrameworkControllerClusterConfig(jsonObject: object): FrameworkControllerClusterConfig {
        const storageConfig: StorageConfig = <StorageConfig>jsonObject;
        if (storageConfig === undefined) {
            throw new Error('Invalid json object as a StorageConfig instance');
        }
        if (storageConfig.storage !== undefined && storageConfig.storage === 'azureStorage') {
            return FrameworkControllerClusterConfigAzure.getInstance(jsonObject);
        } else if (storageConfig.storage === undefined || storageConfig.storage === 'nfs') {
            return FrameworkControllerClusterConfigNFS.getInstance(jsonObject);
        }
        throw new Error(`Invalid json object ${jsonObject}`);
    }
}

export type FrameworkControllerJobStatus =
    'AttemptRunning' | 'Completed' | 'AttemptCreationPending' | 'AttemptCreationRequested' | 'AttemptPreparing' | 'AttemptCompleted';

export type FrameworkControllerJobCompleteStatus = 'Succeeded' | 'Failed';
