import { Component } from '@angular/core';
import { MatDialog } from '@angular/material/dialog';
import { ActivatedRoute, Router } from '@angular/router';
import { Observable, of as observableOf, throwError } from 'rxjs';
import { map, switchMap, tap } from 'rxjs/operators';

import { AuthService } from '../../auth/auth.service';
import { Table } from '../../core/table';
import { ToasterService } from '../../core/toaster.service';
import { SaleCategoryService } from '../../sale-category/sale-category.service';
import { ConfirmDialogComponent } from '../../shared/confirm-dialog/confirm-dialog.component';
import { TableService } from '../../tables/table.service';
import { BillTypeComponent } from '../bill-type/bill-type.component';
import { BillService } from '../bill.service';
import { PrintType } from '../bills/print-type';
import { DiscountComponent } from '../discount/discount.component';
import { ReasonComponent } from '../reason/reason.component';
import { ReceivePaymentComponent } from '../receive-payment/receive-payment.component';
import { TablesDialogComponent } from '../tables-dialog/tables-dialog.component';

@Component({
  selector: 'app-sales-home',
  templateUrl: './sales-home.component.html',
  styleUrls: ['./sales-home.component.css'],
})
export class SalesHomeComponent {
  constructor(
    private route: ActivatedRoute,
    private router: Router,
    private dialog: MatDialog,
    private auth: AuthService,
    private toaster: ToasterService,
    private mcSer: SaleCategoryService,
    private tSer: TableService,
    private bs: BillService,
  ) {}

  printKotAllowed(): boolean {
    if (this.auth.user && this.auth.user.perms.indexOf('print-kot') === -1) {
      return false;
    }
    if (!this.bs.bill.id) {
      return true;
    }
    if (this.bs.bill.voucherType !== PrintType.Kot) {
      return false;
    }
    if (this.bs.bill.isVoid) {
      return false;
    }
    return true;
  }

  printKot() {
    if (!this.printKotAllowed()) {
      return;
    }
    let guestBookId = null;
    if (this.route.snapshot.queryParamMap.has('guest')) {
      guestBookId = this.route.snapshot.queryParamMap.get('guest');
    }
    this.bs.printKot(guestBookId).subscribe(() => {
      this.toaster.show('Success', '');
      this.router.navigate(['/sales']);
    });
  }

  discountAllowed(): boolean {
    return this.auth.user && this.auth.user.perms.indexOf('discount') !== -1;
  }

  showDiscount(): Observable<boolean | { id: string; name: string; discount: number }[]> {
    if (this.discountAllowed()) {
      const dialogRef = this.dialog.open(DiscountComponent, {
        // width: '750px',
        data: this.mcSer.listForDiscount(),
      });
      return dialogRef.afterClosed();
    }
    return observableOf(false);
  }

  discount(): void {
    this.showDiscount().subscribe(
      (result: boolean | { id: string; name: string; discount: number }[]) => {
        if (result) {
          this.bs.discount(result as { id: string; name: string; discount: number }[]);
        }
      },
    );
  }

  billTypeDialog() {
    if (this.bs.bill.voucherType !== PrintType.Kot) {
      return observableOf(this.bs.bill.voucherType);
    }
    return this.dialog
      .open(BillTypeComponent)
      .afterClosed()
      .pipe(
        tap((x) => {
          if (!x) {
            throwError('No Bill Type Chosen');
          }
        }),
      );
  }

  confirmTableDialog(table: Table): Observable<{ table: Table; confirmed: boolean }> {
    return this.dialog
      .open(ConfirmDialogComponent, {
        width: '250px',
        data: { title: 'Select Table?', content: 'Are you sure?' },
      })
      .afterClosed()
      .pipe(map((x: boolean) => ({ table, confirmed: x })));
  }

  confirmVoidDialog(reason: string): Observable<boolean | string> {
    return this.dialog
      .open(ConfirmDialogComponent, {
        width: '250px',
        data: { title: 'Void Bill?', content: 'Are you sure?' },
      })
      .afterClosed()
      .pipe(map((x: boolean) => (x ? reason : x)));
  }

  printBillAllowed(): boolean {
    if (this.auth.user && this.auth.user.perms.indexOf('print-bill') === -1) {
      return false;
    }
    if (!this.bs.bill.id) {
      return true;
    }
    if (
      this.bs.bill.voucherType !== PrintType.Kot &&
      this.auth.user.perms.indexOf('edit-printed-bill') === -1
    ) {
      return false;
    }
    if (this.bs.bill.isVoid) {
      return false;
    }
    return true;
  }

  printBill() {
    if (!this.printBillAllowed()) {
      return;
    }
    let guestBookId = null;
    if (this.route.snapshot.queryParamMap.has('guest')) {
      guestBookId = this.route.snapshot.queryParamMap.get('guest');
    }
    this.showDiscount()
      .pipe(
        tap((result: boolean | { id: string; name: string; discount: number }[]) => {
          if (result) {
            this.bs.discount(result as { id: string; name: string; discount: number }[]);
          }
        }),
        switchMap(() => this.billTypeDialog()),
        switchMap((x: boolean | PrintType) => {
          if (x) {
            return this.bs.printBill(guestBookId, x as PrintType);
          }
          return throwError(x);
        }),
      )
      .subscribe(
        () => {
          this.toaster.show('Success', '');
          this.router.navigate(['/sales']);
        },
        () => {
          this.toaster.show('Error', 'No Bill Type Chosen');
        },
      );
  }

  receivePaymentAllowed(): boolean {
    if (this.auth.user && this.auth.user.perms.indexOf('settle-bill') === -1) {
      return false;
    }
    if (!this.bs.bill.id) {
      return false;
    }
    if (this.bs.bill.voucherType === PrintType.Kot) {
      return false;
    }
    if (this.bs.bill.isVoid) {
      return false;
    }
    return true;
  }

  receivePaymentWithReason(type: string, amount: number): Observable<boolean> {
    const types = {
      NO_CHARGE: [
        {
          id: 4,
          name: 'No Charge',
          amount,
        },
      ],
      STAFF: [
        {
          id: 10,
          name: 'Staff Account',
          amount,
        },
      ],
    };
    return this.dialog
      .open(ReasonComponent, {
        // width: '750px'
        data: { title: type === 'NO_CHARGE' ? 'NC for whom' : 'Staff name' },
      })
      .afterClosed()
      .pipe(
        switchMap((value: boolean | string) => {
          if (value) {
            return this.bs.receivePayment(types[type], value as string);
          }
          return throwError('Cancelled');
        }),
      );
  }

  receiveRegularPayment(type: string, amount: number): Observable<boolean> {
    return this.dialog
      .open(ReceivePaymentComponent, {
        // width: '750px',
        data: {
          type,
          amount,
        },
      })
      .afterClosed()
      .pipe(
        switchMap((value: boolean | { id: number; name: string; amount: number }[]) => {
          if (value) {
            return this.bs.receivePayment(
              value as { id: number; name: string; amount: number }[],
              '',
            );
          }
          return throwError('Cancelled');
        }),
      );
  }

  receivePayment() {
    if (!this.receivePaymentAllowed()) {
      return;
    }
    const amount = this.bs.amountVal();
    const type = this.bs.type();
    let obs: any;
    if (type === 'NO_CHARGE' || type === 'STAFF') {
      obs = this.receivePaymentWithReason(type, amount);
    } else {
      obs = this.receiveRegularPayment(type, amount);
    }
    obs.subscribe(() => {
      this.toaster.show('Success', '');
      this.router.navigate(['/sales']);
    });
  }

  moveTableAllowed(): boolean {
    // TODO: Check if this condition should be "and" or "or"
    if (
      this.auth.user &&
      this.auth.user.perms.indexOf('move-table') === -1 &&
      this.auth.user.perms.indexOf('merge-tables') === -1
    ) {
      return false;
    }
    if (!this.bs.bill.id) {
      return false;
    }
    return true;
  }

  moveTable() {
    if (!this.moveTableAllowed()) {
      return;
    }
    const canMergeTables = this.auth.user.perms.indexOf('merge-tables') !== -1;
    this.dialog
      .open(TablesDialogComponent, {
        // width: '750px',
        data: {
          list: this.tSer.running(),
          canChooseRunning: canMergeTables,
        },
      })
      .afterClosed()
      .pipe(
        switchMap((x: boolean | Table) => {
          if (x) {
            return this.confirmTableDialog(x as Table);
          }
          return throwError('Please choose a table');
        }),
        // eslint-disable-next-line @typescript-eslint/no-unused-vars
        switchMap((value: { table: Table; confirmed: boolean }, index: number) => {
          if (!value.confirmed) {
            return throwError('Please confirm move');
          }
          if (value.table.status) {
            return this.bs.mergeTable(value.table);
          }
          return this.bs.moveTable(value.table);
        }),
      )
      .subscribe(
        () => {
          this.toaster.show('Success', '');
          this.router.navigate(['/sales']);
        },
        (x) => {
          this.toaster.show('Error', x);
        },
      );
  }

  voidBillAllowed(): boolean {
    if (this.auth.user && this.auth.user.perms.indexOf('void-bill') === -1) {
      return false;
    }
    if (!this.bs.bill.id) {
      return false;
    }
    return true;
  }

  voidBill() {
    if (!this.voidBillAllowed()) {
      return;
    }
    this.dialog
      .open(ReasonComponent, {
        // width: '750px'
        data: {
          title: 'Void Reason',
          reasons: [
            'Discount',
            'Printing fault',
            'Item changed',
            'Quantity reduced',
            'Costing bill for party',
            'Cashier mistake',
            'Management free sale',
          ],
        },
      })
      .afterClosed()
      .pipe(
        switchMap((x: boolean | string) => {
          if (x) {
            return this.confirmVoidDialog(x as string);
          }
          return throwError('Please choose a reason to void the bill');
        }),
        switchMap((x: boolean | string) => {
          if (x) {
            return this.bs.voidBill(x as string);
          }
          return throwError('You chose not to void the bill');
        }),
      )
      .subscribe(
        () => {
          this.toaster.show('Success', '');
          this.router.navigate(['/sales']);
        },
        (x) => {
          this.toaster.show('Error', x);
        },
      );
  }

  splitBillAllowed(): boolean {
    if (this.auth.user && this.auth.user.perms.indexOf('split-bill') === -1) {
      return false;
    }
    if (!this.bs.bill.id) {
      return false;
    }
    return true;
  }

  splitBill() {
    if (!this.splitBillAllowed()) {
      return;
    }
    this.dialog
      .open(TablesDialogComponent, {
        // width: '750px',
        data: {
          list: this.tSer.running(),
          canChooseRunning: false,
        },
      })
      .afterClosed()
      .pipe(
        switchMap((x: boolean | Table) => {
          if (x) {
            return this.confirmTableDialog(x as Table);
          }
          return throwError('Please choose a table');
        }),
        // eslint-disable-next-line @typescript-eslint/no-unused-vars
        switchMap((value: { table: Table; confirmed: boolean }, index: number) => {
          if (!value.confirmed) {
            return throwError('Please confirm split');
          }
          return this.bs.splitBill(value.table);
        }),
      )
      .subscribe(
        () => {
          this.toaster.show('Success', '');
          this.router.navigate(['/sales']);
        },
        (x) => {
          this.toaster.show('Error', x);
        },
      );
  }
}