import { Component, OnDestroy, OnInit } from '@angular/core';
import { FormControl, FormGroup, Validators } from '@angular/forms';
import { ToastrService } from 'ngx-toastr';
import { take } from 'rxjs/operators';
import { Options } from '@angular-slider/ngx-slider';
import { Title } from '@angular/platform-browser';
import { BookService } from 'src/app/book-reader/book.service';
import { readingDirections, scalingOptions, pageSplitOptions, readingModes, Preferences } from 'src/app/_models/preferences/preferences';
import { User } from 'src/app/_models/user';
import { AccountService } from 'src/app/_services/account.service';
import { NavService } from 'src/app/_services/nav.service';
import { ActivatedRoute } from '@angular/router';
import { SettingsService } from 'src/app/admin/settings.service';

@Component({
  selector: 'app-user-preferences',
  templateUrl: './user-preferences.component.html',
  styleUrls: ['./user-preferences.component.scss']
})
export class UserPreferencesComponent implements OnInit, OnDestroy {

  readingDirections = readingDirections;
  scalingOptions = scalingOptions;
  pageSplitOptions = pageSplitOptions;
  readingModes = readingModes;

  settingsForm: FormGroup = new FormGroup({});
  passwordChangeForm: FormGroup = new FormGroup({});
  user: User | undefined = undefined;
  isAdmin: boolean = false;
  hasChangePasswordRole: boolean = false;

  passwordsMatch = false;
  resetPasswordErrors: string[] = [];

  obserableHandles: Array<any> = [];

  bookReaderLineSpacingOptions: Options = {
    floor: 100,
    ceil: 250,
    step: 10,
  };
  bookReaderMarginOptions: Options = {
    floor: 0,
    ceil: 30,
    step: 5,
  };
  bookReaderFontSizeOptions: Options = {
    floor: 50,
    ceil: 300,
    step: 10,
  };
  fontFamilies: Array<string> = [];

  tabs: Array<{title: string, fragment: string}> = [
    {title: 'Preferences', fragment: ''},
    {title: 'Bookmarks', fragment: 'bookmarks'},
    {title: 'Password', fragment: 'password'},
    {title: '3rd Party Clients', fragment: 'clients'},
    {title: 'Theme', fragment: 'theme'},
  ];
  active = this.tabs[0];
  opdsEnabled: boolean = false;
  makeUrl: (val: string) => string = (val: string) => {return this.transformKeyToOpdsUrl(val)};

  constructor(private accountService: AccountService, private toastr: ToastrService, private bookService: BookService, 
    private navService: NavService, private titleService: Title, private route: ActivatedRoute, private settingsService: SettingsService) {
    this.fontFamilies = this.bookService.getFontFamilies();

    this.route.fragment.subscribe(frag => {
      const tab = this.tabs.filter(item => item.fragment === frag);
      if (tab.length > 0) {
        this.active = tab[0];
      } else {
        this.active = this.tabs[0]; // Default to first tab
      }
    });

    this.settingsService.getOpdsEnabled().subscribe(res => {
      this.opdsEnabled = res;
    });
  }

  ngOnInit(): void {
    this.titleService.setTitle('Kavita - User Preferences');
    this.accountService.currentUser$.pipe(take(1)).subscribe((user) => {
      if (user) {
        this.user = user;
        this.isAdmin = this.accountService.hasAdminRole(user);
        this.hasChangePasswordRole = this.accountService.hasChangePasswordRole(user);

        if (this.fontFamilies.indexOf(this.user.preferences.bookReaderFontFamily) < 0) {
          this.user.preferences.bookReaderFontFamily = 'default';
        }
        
        this.settingsForm.addControl('readingDirection', new FormControl(user.preferences.readingDirection, []));
        this.settingsForm.addControl('scalingOption', new FormControl(user.preferences.scalingOption, []));
        this.settingsForm.addControl('pageSplitOption', new FormControl(user.preferences.pageSplitOption, []));
        this.settingsForm.addControl('autoCloseMenu', new FormControl(user.preferences.autoCloseMenu, []));
        this.settingsForm.addControl('readerMode', new FormControl(user.preferences.readerMode, []));
        this.settingsForm.addControl('bookReaderDarkMode', new FormControl(user.preferences.bookReaderDarkMode, []));
        this.settingsForm.addControl('bookReaderFontFamily', new FormControl(user.preferences.bookReaderFontFamily, []));
        this.settingsForm.addControl('bookReaderFontSize', new FormControl(user.preferences.bookReaderFontSize, []));
        this.settingsForm.addControl('bookReaderLineSpacing', new FormControl(user.preferences.bookReaderLineSpacing, []));
        this.settingsForm.addControl('bookReaderMargin', new FormControl(user.preferences.bookReaderMargin, []));
        this.settingsForm.addControl('bookReaderReadingDirection', new FormControl(user.preferences.bookReaderReadingDirection, []));
        this.settingsForm.addControl('bookReaderTapToPaginate', new FormControl(!!user.preferences.bookReaderTapToPaginate, []));

        this.settingsForm.addControl('theme', new FormControl(user.preferences.theme, []));
      }
    });

    this.passwordChangeForm.addControl('password', new FormControl('', [Validators.required]));
    this.passwordChangeForm.addControl('confirmPassword', new FormControl('', [Validators.required]));

    this.obserableHandles.push(this.passwordChangeForm.valueChanges.subscribe(() => {
      const values = this.passwordChangeForm.value;
      this.passwordsMatch = values.password === values.confirmPassword;
    }));
  }

  ngOnDestroy() {
    this.obserableHandles.forEach(o => o.unsubscribe());
  }

  public get password() { return this.passwordChangeForm.get('password'); }
  public get confirmPassword() { return this.passwordChangeForm.get('confirmPassword'); }

  resetForm() {
    if (this.user === undefined) { return; }
    this.settingsForm.get('readingDirection')?.setValue(this.user.preferences.readingDirection);
    this.settingsForm.get('scalingOption')?.setValue(this.user.preferences.scalingOption);
    this.settingsForm.get('autoCloseMenu')?.setValue(this.user.preferences.autoCloseMenu);
    this.settingsForm.get('readerMode')?.setValue(this.user.preferences.readerMode);
    this.settingsForm.get('pageSplitOption')?.setValue(this.user.preferences.pageSplitOption);
    this.settingsForm.get('bookReaderDarkMode')?.setValue(this.user.preferences.bookReaderDarkMode);
    this.settingsForm.get('bookReaderFontFamily')?.setValue(this.user.preferences.bookReaderFontFamily);
    this.settingsForm.get('bookReaderFontSize')?.setValue(this.user.preferences.bookReaderFontSize);
    this.settingsForm.get('bookReaderLineSpacing')?.setValue(this.user.preferences.bookReaderLineSpacing);
    this.settingsForm.get('bookReaderMargin')?.setValue(this.user.preferences.bookReaderMargin);
    this.settingsForm.get('bookReaderTapToPaginate')?.setValue(this.user.preferences.bookReaderTapToPaginate);
    this.settingsForm.get('bookReaderReadingDirection')?.setValue(this.user.preferences.bookReaderReadingDirection);
    this.settingsForm.get('theme')?.setValue(this.user.preferences.theme);
  }

  resetPasswordForm() {
    this.passwordChangeForm.get('password')?.setValue('');
    this.passwordChangeForm.get('confirmPassword')?.setValue('');
    this.resetPasswordErrors = [];
  }

  save() {
    if (this.user === undefined) return;
    const modelSettings = this.settingsForm.value;
    const data: Preferences = {
      readingDirection: parseInt(modelSettings.readingDirection, 10), 
      scalingOption: parseInt(modelSettings.scalingOption, 10), 
      pageSplitOption: parseInt(modelSettings.pageSplitOption, 10), 
      autoCloseMenu: modelSettings.autoCloseMenu, 
      readerMode: parseInt(modelSettings.readerMode), 
      bookReaderDarkMode: modelSettings.bookReaderDarkMode,
      bookReaderFontFamily: modelSettings.bookReaderFontFamily,
      bookReaderLineSpacing: modelSettings.bookReaderLineSpacing,
      bookReaderFontSize: modelSettings.bookReaderFontSize,
      bookReaderMargin: modelSettings.bookReaderMargin,
      bookReaderTapToPaginate: modelSettings.bookReaderTapToPaginate,
      bookReaderReadingDirection: parseInt(modelSettings.bookReaderReadingDirection, 10),
      theme: modelSettings.theme
    };
    this.obserableHandles.push(this.accountService.updatePreferences(data).subscribe((updatedPrefs) => {
      this.toastr.success('Server settings updated');
      if (this.user) {
        this.user.preferences = updatedPrefs;
      }
      this.resetForm();
    }));
  }

  savePasswordForm() {
    if (this.user === undefined) { return; }

    const model = this.passwordChangeForm.value;
    this.resetPasswordErrors = [];
    this.obserableHandles.push(this.accountService.resetPassword(this.user?.username, model.confirmPassword).subscribe(() => {
      this.toastr.success('Password has been updated');
      this.resetPasswordForm();
    }, err => {
      this.resetPasswordErrors = err;
    }));
  }

  transformKeyToOpdsUrl(key: string) {
    return `${location.origin}/api/opds/${key}`;
  }
}