/********************************************************************************
 * Copyright (c) 2021-2022 EclipseSource and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * https://www.eclipse.org/legal/epl-2.0, or the MIT License which is
 * available at https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: EPL-2.0 OR MIT
 *******************************************************************************/
import { isModelServerObjectArray, isModelServerReferenceDescriptionArray, isNumberArray } from '../utils/model-server-utils';
import { DataValueType, ModelServerObject, ModelServerReferenceDescription } from './base-model';
import { ChangeDescription } from './change-model';

export namespace ModelServerCommandPackage {
    export const NS_URI = 'http://www.eclipse.org/emfcloud/modelserver/command';
}

export class ModelServerCommand extends ModelServerObject {
    static readonly URI = ModelServerCommandPackage.NS_URI + '#//Command';
    eClass = ModelServerCommand.URI;

    owner?: ModelServerReferenceDescription;
    feature?: string;
    indices?: number[];
    dataValues?: DataValueType[];
    objectValues?: ModelServerReferenceDescription[];
    objectsToAdd?: ModelServerObject[];

    constructor(public type: string, public properties?: { [key: string]: string }) {
        super();
    }

    public setProperty(key: string, value: string): void {
        if (this.properties === undefined) {
            this.properties = {};
        }
        this.properties[key] = value;
    }

    public getProperty(key: string): undefined | string {
        return this.properties && this.properties[key];
    }

    static is(object?: unknown): object is ModelServerCommand {
        return (
            ModelServerObject.is(object) &&
            object.eClass === ModelServerCommand.URI &&
            'type' in object &&
            typeof object['type'] === 'string'
        );
    }
}

export class CompoundCommand extends ModelServerCommand {
    static readonly TYPE = 'compound';
    static readonly URI = ModelServerCommandPackage.NS_URI + '#//CompoundCommand';
    eClass = CompoundCommand.URI;

    constructor(public commands: ModelServerCommand[] = []) {
        super(CompoundCommand.TYPE);
    }

    static is(object?: unknown): object is ModelServerCommand {
        return (
            ModelServerObject.is(object) &&
            object.eClass === CompoundCommand.URI &&
            'type' in object &&
            typeof object['type'] === 'string' &&
            object['type'] === CompoundCommand.TYPE &&
            'commands' in object
        );
    }
}

export class RemoveCommand extends ModelServerCommand {
    static readonly TYPE = 'remove';

    constructor(owner: ModelServerReferenceDescription, feature: string, indices: number[]);
    constructor(owner: ModelServerReferenceDescription, feature: string, objectValues: ModelServerReferenceDescription[]);
    constructor(
        public owner: ModelServerReferenceDescription,
        public feature: string,
        toDelete: number[] | ModelServerReferenceDescription[]
    ) {
        super(RemoveCommand.TYPE);
        if (isNumberArray(toDelete)) {
            this.indices = toDelete;
        } else {
            this.objectValues = toDelete;
        }
    }

    static is(object?: unknown): object is ModelServerCommand {
        return ModelServerCommand.is(object) && object.type === RemoveCommand.TYPE;
    }
}

export class AddCommand extends ModelServerCommand {
    static readonly TYPE = 'add';

    constructor(owner: ModelServerReferenceDescription, feature: string, toAdd: DataValueType[] | ModelServerObject[]);
    constructor(owner: ModelServerReferenceDescription, feature: string, toAdd: DataValueType[] | ModelServerObject[], index: number);
    constructor(
        public owner: ModelServerReferenceDescription,
        public feature: string,
        toAdd: DataValueType[] | ModelServerObject[],
        index?: number
    ) {
        super(AddCommand.TYPE);
        if (index) {
            this.indices = [index];
        }
        if (isModelServerObjectArray(toAdd)) {
            const objectValues: ModelServerReferenceDescription[] = toAdd.map(
                (o, i) => new ModelServerReferenceDescription(o.eClass, `//@objectsToAdd.${i}`)
            );
            this.objectsToAdd = toAdd;
            this.objectValues = objectValues;
        } else {
            this.dataValues = toAdd;
        }
    }

    static is(object?: unknown): object is ModelServerCommand {
        return ModelServerCommand.is(object) && object.type === AddCommand.TYPE;
    }
}

export class SetCommand extends ModelServerCommand {
    static readonly TYPE = 'set';

    constructor(
        public owner: ModelServerReferenceDescription,
        public feature: string,
        changedValues: DataValueType[] | ModelServerReferenceDescription[] | ModelServerObject[]
    ) {
        super(SetCommand.TYPE);
        if (isModelServerReferenceDescriptionArray(changedValues)) {
            this.objectValues = changedValues;
        } else if (isModelServerObjectArray(changedValues)) {
            this.objectsToAdd = changedValues;
        } else {
            this.dataValues = changedValues;
        }
    }

    static is(object?: unknown): object is ModelServerCommand {
        return ModelServerCommand.is(object) && object.type === SetCommand.TYPE;
    }
}

export namespace CommandExecutionType {
    export const EXECCUTE = 'execute';

    export const UNDO = 'undo';

    export const REDO = 'redo';
}

export class CommandExecutionResult implements ModelServerObject {
    static readonly URI = ModelServerCommandPackage.NS_URI + '#//CommandExecutionResult';
    eClass = CommandExecutionResult.URI;

    affectedObjects?: ModelServerReferenceDescription[];
    details?: { [key: string]: string };

    constructor(public type: string, public source: ModelServerCommand, public changeDescription: ChangeDescription) {}

    static is(object?: unknown): object is CommandExecutionResult {
        return (
            ModelServerObject.is(object) &&
            object.eClass === CommandExecutionResult.URI &&
            'type' in object &&
            typeof object['type'] === 'string' &&
            'source' in object &&
            'changeDescription' in object &&
            ChangeDescription.is(object['changeDescription'])
        );
    }
}