import { Component, OnInit, ViewChild } from "@angular/core";
import {
    FormGroup,
    FormControl,
    Validators,
    ReactiveFormsModule,
} from "@angular/forms";
import { MatTableDataSource, MatTableModule } from "@angular/material/table";
import { MatPaginator, MatPaginatorModule } from "@angular/material/paginator";
import { trigger, state, style } from "@angular/animations";
import { CommonModule } from "@angular/common";
import { MatIconModule } from "@angular/material/icon";
import { MatFormFieldModule } from "@angular/material/form-field";
import { TranslateModule } from "@ngx-translate/core";
import { MatButtonModule } from "@angular/material/button";
import { MatInputModule } from "@angular/material/input";

import { ImageService } from "../../services/image.service";
import { ServiceComm } from "../../services/service-comm.service";
import { ImageResp } from "../../models/image";
import { AddAction } from "../../models/add-action.enum";

@Component({
    selector: "app-list-of-images",
    templateUrl: "./list-of-images.component.html",
    styleUrls: ["./list-of-images.component.css"],
    animations: [
        trigger("rotatedState", [
            state("default", style({ transform: "rotate(0)" })),
            state("rot90", style({ transform: "rotate(-90deg)" })),
            state("rot180", style({ transform: "rotate(-180deg)" })),
            state("rot270", style({ transform: "rotate(-270deg)" })),
        ]),
    ],
    imports: [
        TranslateModule,
        CommonModule,
        MatIconModule,
        MatPaginatorModule,
        MatFormFieldModule,
        ReactiveFormsModule,
        MatTableModule,
        MatButtonModule,
        MatInputModule,
    ],
})
export class ListOfImagesComponent implements OnInit {
    public displayedColumns: Array<string> = ["comment", "data"];
    public imgForm: FormGroup;
    public imageError: string;
    private selectedFile: string;
    public popinImage: string;
    public showPopin: boolean;
    public dataSourceTable: MatTableDataSource<ImageResp>;
    public resultsLength = 0;
    public stateRotation: string = "default";
    @ViewChild(MatPaginator, { static: true }) paginator: MatPaginator;

    constructor(
        private serviceApi: ImageService,
        private serviceComm: ServiceComm,
    ) {}

    ngOnInit(): void {
        this.serviceComm.refreshRequest.subscribe((action) => {
            if (action === AddAction.Gear) {
                this.getListOfImages();
            }
        });
        this.getListOfImages();

        this.imgForm = new FormGroup({
            comment: new FormControl("", Validators.required),
            image: new FormControl("", Validators.required),
        });
    }

    private getListOfImages() {
        this.serviceApi.getListOfImages().subscribe((data) => {
            setTimeout(() => {
                this.dataSourceTable = new MatTableDataSource<ImageResp>(data);
                this.dataSourceTable.paginator = this.paginator;
                this.resultsLength = data.length;
            }, 500);
        });
    }

    public onFileChanged(fileInput: any) {
        const file = fileInput.dataTransfer
            ? fileInput.dataTransfer.files[0]
            : fileInput.target.files[0];
        const allowed_types = ["image/png", "image/jpeg"];
        const max_size = 20971520;

        if (!allowed_types.includes(file.type)) {
            this.imageError = "Only Images are allowed ( JPG | PNG )";
        } else if (file.size > max_size) {
            this.imageError =
                "Maximum size allowed is " + max_size / 1000 + "Mb";
        } else {
            const reader = new FileReader();
            reader.onload = this.checkAndExtractDataToBase64.bind(this);
            reader.readAsDataURL(fileInput.target.files[0]);
        }
    }

    private checkAndExtractDataToBase64(e: any) {
        const max_height = 15200;
        const max_width = 25600;

        const image = new Image();
        image.src = e.target.result;
        image.onload = (rs) => {
            const img_height = rs.currentTarget["height"];
            const img_width = rs.currentTarget["width"];

            if (img_height > max_height && img_width > max_width) {
                this.imageError =
                    "Maximum dimentions allowed " +
                    max_height +
                    "*" +
                    max_width +
                    "px";
            } else {
                const imgBase64Path = e.target.result;
                this.selectedFile = imgBase64Path;
                this.imageError = "OK";
            }
        };
    }

    onSubmit(formData) {
        if (formData.invalid) {
            return;
        }

        this.serviceApi
            .addImage(formData.comment, this.selectedFile)
            .subscribe(() => {
                this.getListOfImages();
            });
    }

    openModal(image: ImageResp) {
        this.popinImage = image.data;
        this.showPopin = true;
    }

    closeModal() {
        this.showPopin = false;
    }

    rotate() {
        if (this.stateRotation === "default") {
            this.stateRotation = "rot90";
        } else if (this.stateRotation === "rot90") {
            this.stateRotation = "rot180";
        } else if (this.stateRotation === "rot180") {
            this.stateRotation = "rot270";
        } else {
            this.stateRotation = "default";
        }
    }
}