import { Injectable } from '@angular/core';
import { FuseMockApiService, FuseMockApiUtils } from '@fuse/lib/mock-api';
import { messages as messagesData } from 'app/mock-api/common/messages/data';
import { assign, cloneDeep } from 'lodash-es';

@Injectable({providedIn: 'root'})
export class MessagesMockApi
{
    private _messages: any = messagesData;

    /**
     * Constructor
     */
    constructor(private _fuseMockApiService: FuseMockApiService)
    {
        // Register Mock API handlers
        this.registerHandlers();
    }

    // -----------------------------------------------------------------------------------------------------
    // @ Public methods
    // -----------------------------------------------------------------------------------------------------

    /**
     * Register Mock API handlers
     */
    registerHandlers(): void
    {
        // -----------------------------------------------------------------------------------------------------
        // @ Messages - GET
        // -----------------------------------------------------------------------------------------------------
        this._fuseMockApiService
            .onGet('api/common/messages')
            .reply(() => [200, cloneDeep(this._messages)]);

        // -----------------------------------------------------------------------------------------------------
        // @ Messages - POST
        // -----------------------------------------------------------------------------------------------------
        this._fuseMockApiService
            .onPost('api/common/messages')
            .reply(({request}) =>
            {
                // Get the message
                const newMessage = cloneDeep(request.body.message);

                // Generate a new GUID
                newMessage.id = FuseMockApiUtils.guid();

                // Unshift the new message
                this._messages.unshift(newMessage);

                // Return the response
                return [200, newMessage];
            });

        // -----------------------------------------------------------------------------------------------------
        // @ Messages - PATCH
        // -----------------------------------------------------------------------------------------------------
        this._fuseMockApiService
            .onPatch('api/common/messages')
            .reply(({request}) =>
            {
                // Get the id and message
                const id = request.body.id;
                const message = cloneDeep(request.body.message);

                // Prepare the updated message
                let updatedMessage = null;

                // Find the message and update it
                this._messages.forEach((item: any, index: number, messages: any[]) =>
                {
                    if ( item.id === id )
                    {
                        // Update the message
                        messages[index] = assign({}, messages[index], message);

                        // Store the updated message
                        updatedMessage = messages[index];
                    }
                });

                // Return the response
                return [200, updatedMessage];
            });

        // -----------------------------------------------------------------------------------------------------
        // @ Messages - DELETE
        // -----------------------------------------------------------------------------------------------------
        this._fuseMockApiService
            .onDelete('api/common/messages')
            .reply(({request}) =>
            {
                // Get the id
                const id = request.params.get('id');

                // Prepare the deleted message
                let deletedMessage = null;

                // Find the message
                const index = this._messages.findIndex((item: any) => item.id === id);

                // Store the deleted message
                deletedMessage = cloneDeep(this._messages[index]);

                // Delete the message
                this._messages.splice(index, 1);

                // Return the response
                return [200, deletedMessage];
            });

        // -----------------------------------------------------------------------------------------------------
        // @ Mark all as read - GET
        // -----------------------------------------------------------------------------------------------------
        this._fuseMockApiService
            .onGet('api/common/messages/mark-all-as-read')
            .reply(() =>
            {
                // Go through all messages
                this._messages.forEach((item: any, index: number, messages: any[]) =>
                {
                    // Mark it as read
                    messages[index].read = true;
                    messages[index].seen = true;
                });

                // Return the response
                return [200, true];
            });

        // -----------------------------------------------------------------------------------------------------
        // @ Toggle read status - POST
        // -----------------------------------------------------------------------------------------------------
        this._fuseMockApiService
            .onPost('api/common/messages/toggle-read-status')
            .reply(({request}) =>
            {
                // Get the message
                const message = cloneDeep(request.body.message);

                // Prepare the updated message
                let updatedMessage = null;

                // Find the message and update it
                this._messages.forEach((item: any, index: number, messages: any[]) =>
                {
                    if ( item.id === message.id )
                    {
                        // Update the message
                        messages[index].read = message.read;

                        // Store the updated message
                        updatedMessage = messages[index];
                    }
                });

                // Return the response
                return [200, updatedMessage];
            });
    }
}