import { Component, inject } from '@angular/core';
import { ActivatedRoute, RouterModule } from '@angular/router';
import { takeUntilDestroyed, toSignal } from '@angular/core/rxjs-interop';

import type {
  Cell,
  PluginMessageEvent,
  TableConfigEvent,
  TableOptions,
} from '../app/model';
import { filter, fromEvent, map, merge, take } from 'rxjs';
import { FormBuilder, ReactiveFormsModule, FormGroup } from '@angular/forms';

@Component({
  imports: [RouterModule, ReactiveFormsModule],
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrl: './app.component.css',
  host: {
    '[attr.data-theme]': 'theme()',
  },
})
export class AppComponent {
  private readonly fb = inject(FormBuilder);

  public table: string[][] = [];
  public cells = [...Array(48).keys()];
  public selectedRow = 0;
  public selectedColumn = 0;
  public selectedCell: Cell | undefined;
  public fileError = false;

  public form: FormGroup = this.fb.group({
    filledHeaderRow: [false],
    filledHeaderColumn: [false],
    borders: [false],
    alternateRows: [false],
  });

  route = inject(ActivatedRoute);
  messages$ = fromEvent<MessageEvent<PluginMessageEvent>>(window, 'message');

  initialTheme$ = this.route.queryParamMap.pipe(
    map((params) => params.get('theme')),
    filter((theme) => !!theme),
    take(1),
  );

  theme = toSignal(
    merge(
      this.initialTheme$,
      this.messages$.pipe(
        filter((event) => event.data.type === 'theme'),
        map((event) => {
          return event.data.content;
        }),
      ),
    ),
  );

  constructor() {
    this.initConfig();
  }

  onSelectFile(event: Event) {
    const target = event.target as HTMLInputElement;
    if (
      target.files &&
      target.files[0] &&
      target.files[0].type === 'text/csv'
    ) {
      const reader = new FileReader();
      reader.readAsText(target.files[0]);
      reader.onload = (e) => {
        this.table = (e?.target?.result as string)
          ?.split(/\r?\n|\r|\n/g)
          .map((it) => it.trim())
          .filter((it) => it !== '')
          .map((it) => it.split(',').map((it) => (!it ? ' ' : it.trim())));

        this.sendMessage({
          content: {
            import: this.table,
            type: 'import',
            options: this.form.value,
          },
          type: 'table',
        });
      };
    } else {
      this.fileError = true;
    }
  }

  createTable(cell: number) {
    const data = this.getCellColRow(cell);
    this.sendMessage({
      content: {
        new: { column: data.column, row: data.row },
        type: 'new',
        options: this.form.value,
      },
      type: 'table',
    });
  }

  setColRow(cell: number) {
    this.clearError();
    this.selectedCell = this.getCellColRow(cell);
    this.selectedColumn = this.selectedCell.column;
    this.selectedRow = this.selectedCell.row;
  }

  clearColRow() {
    this.selectedCell = undefined;
    this.selectedColumn = 0;
    this.selectedRow = 0;
  }

  clearError() {
    this.fileError = false;
  }

  getCellColRow(cell: number) {
    return {
      column: (cell % 8) + 1,
      row: Math.floor(cell / 8) + 1,
    };
  }

  private initConfig(): void {
    this.messages$
      .pipe(
        filter(
          (event) =>
            event.data.type === 'tableconfig' &&
            event.data.content.type === 'retrieve',
        ),
        take(1),
        map((event) => {
          const data = (event.data as TableConfigEvent).content.options;

          return data;
        }),
      )
      .subscribe((data) => {
        if (data) {
          this.form.patchValue(data, { emitEvent: false });
        } else {
          this.form.patchValue({
            filledHeaderRow: true,
            filledHeaderColumn: false,
            borders: true,
            alternateRows: true,
          });
        }
      });

    this.form.valueChanges
      .pipe(takeUntilDestroyed())
      .subscribe((options: TableOptions) => {
        this.sendMessage({
          type: 'tableconfig',
          content: {
            type: 'save',
            options,
          },
        });
      });

    this.sendMessage({
      type: 'tableconfig',
      content: {
        type: 'retrieve',
      },
    });
  }

  private sendMessage(message: PluginMessageEvent): void {
    parent.postMessage(message, '*');
  }
}