import {
  AfterViewInit,
  Component,
  OnDestroy,
  OnInit,
  ViewChild,
  inject,
} from '@angular/core';
import { MatIconButton } from '@angular/material/button';
import { MatDialog } from '@angular/material/dialog';
import { MatIcon } from '@angular/material/icon';
import { MatMenu, MatMenuItem, MatMenuTrigger } from '@angular/material/menu';
import { MatSnackBar } from '@angular/material/snack-bar';
import {
  MatCell,
  MatCellDef,
  MatColumnDef,
  MatHeaderCell,
  MatHeaderCellDef,
  MatHeaderRow,
  MatHeaderRowDef,
  MatRow,
  MatRowDef,
  MatTable,
  MatTableDataSource,
} from '@angular/material/table';
import { MatTooltip } from '@angular/material/tooltip';
import { Router, RouterLink } from '@angular/router';
import { CobblerApiService, File } from 'cobbler-api';
import { Subject } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
import { DialogItemRenameComponent } from '../../../common/dialog-item-rename/dialog-item-rename.component';
import { UserService } from '../../../services/user.service';
import Utils from '../../../utils';
import { FileCreateComponent } from '../create/file-create.component';
import { MatPaginator, MatPaginatorModule } from '@angular/material/paginator';
import { MatInputModule } from '@angular/material/input';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatSort } from '@angular/material/sort';

@Component({
  selector: 'cobbler-file-overview',
  imports: [
    MatCell,
    MatCellDef,
    MatColumnDef,
    MatHeaderCell,
    MatHeaderRow,
    MatHeaderRowDef,
    MatIcon,
    MatIconButton,
    MatMenu,
    MatMenuItem,
    MatRow,
    MatRowDef,
    MatTable,
    MatMenuTrigger,
    MatHeaderCellDef,
    MatTooltip,
    MatPaginatorModule,
    MatInputModule,
    MatFormFieldModule,
    MatSort,
  ],
  templateUrl: './file-overview.component.html',
  styleUrl: './file-overview.component.scss',
})
export class FileOverviewComponent implements OnInit, OnDestroy, AfterViewInit {
  userService = inject(UserService);
  private cobblerApiService = inject(CobblerApiService);
  private _snackBar = inject(MatSnackBar);
  private router = inject(Router);
  readonly dialog = inject<MatDialog>(MatDialog);

  // Unsubscribe
  private ngUnsubscribe = new Subject<void>();

  // Table
  displayedColumns: string[] = ['name', 'action', 'path', 'actions'];
  dataSource = new MatTableDataSource<File>([]);

  @ViewChild(MatTable) table!: MatTable<File>;
  @ViewChild(MatPaginator) paginator!: MatPaginator;
  @ViewChild(MatSort) sort!: MatSort;

  ngOnInit(): void {
    this.retrieveFiles();
  }

  ngAfterViewInit(): void {
    this.dataSource.paginator = this.paginator;
    this.dataSource.sort = this.sort;
  }

  ngOnDestroy(): void {
    this.ngUnsubscribe.next();
    this.ngUnsubscribe.complete();
  }

  applyFilter(event: Event) {
    const filterValue = (event.target as HTMLInputElement).value;
    this.dataSource.filter = filterValue.trim().toLowerCase();

    if (this.dataSource.paginator) {
      this.dataSource.paginator.firstPage();
    }
  }

  private retrieveFiles(): void {
    this.cobblerApiService
      .get_files()
      .pipe(takeUntil(this.ngUnsubscribe))
      .subscribe({
        next: (value) => {
          this.dataSource.data = value;
        },
        error: (error) => {
          // HTML encode the error message since it originates from XML
          this._snackBar.open(Utils.toHTML(error.message), 'Close');
        },
      });
  }

  addFile(): void {
    const dialogRef = this.dialog.open(FileCreateComponent, { width: '40%' });
    dialogRef.afterClosed().subscribe((result) => {
      if (typeof result === 'string') {
        this.router.navigate(['/items', 'file', result]);
      }
    });
  }

  showDistro(uid: string, name: string): void {
    this.router.navigate(['/items', 'file', name]);
  }

  renameFile(uid: string, name: string): void {
    const dialogRef = this.dialog.open(DialogItemRenameComponent, {
      data: {
        itemType: 'Repository',
        itemName: name,
        itemUid: uid,
      },
    });

    dialogRef.afterClosed().subscribe((newItemName) => {
      if (newItemName === undefined) {
        // Cancel means we don't need to rename the file
        return;
      }
      this.cobblerApiService
        .get_file_handle(name, this.userService.token)
        .pipe(takeUntil(this.ngUnsubscribe))
        .subscribe({
          next: (fileHandle) => {
            this.cobblerApiService
              .rename_file(fileHandle, newItemName, this.userService.token)
              .pipe(takeUntil(this.ngUnsubscribe))
              .subscribe({
                next: (value) => {
                  this.retrieveFiles();
                },
                error: (error) => {
                  // HTML encode the error message since it originates from XML
                  this._snackBar.open(Utils.toHTML(error.message), 'Close');
                },
              });
          },
          error: (error) => {
            // HTML encode the error message since it originates from XML
            this._snackBar.open(Utils.toHTML(error.message), 'Close');
          },
        });
    });
  }

  deleteFile(uid: string, name: string): void {
    this.cobblerApiService
      .remove_file(name, this.userService.token, false)
      .pipe(takeUntil(this.ngUnsubscribe))
      .subscribe({
        next: (value) => {
          this.retrieveFiles();
        },
        error: (error) => {
          // HTML encode the error message since it originates from XML
          this._snackBar.open(Utils.toHTML(error.message), 'Close');
        },
      });
  }
}