/**
 * Copyright since 2025 Mifos Initiative
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

import { Component, inject } from '@angular/core';
import { CommonModule, DecimalPipe } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { MatDialogRef, MatDialogModule } from '@angular/material/dialog';
import { MatButtonModule } from '@angular/material/button';
import { MatTooltipModule } from '@angular/material/tooltip';
import { MatSnackBar } from '@angular/material/snack-bar';
import { FaIconComponent } from '@fortawesome/angular-fontawesome';

type DepositType = 'FD-SINGLE' | 'FD-JOINT' | 'RD-MONTHLY' | 'RD-QUARTERLY';

interface DemoClient {
  id: string;
  name: string;
}

@Component({
  selector: 'mifosx-fd-rd-entry-dialog',
  standalone: true,
  templateUrl: './fd-rd-entry-dialog.component.html',
  styleUrls: ['./fd-rd-entry-dialog.component.scss'],
  imports: [CommonModule, DecimalPipe, FormsModule, MatDialogModule, MatButtonModule, MatTooltipModule, FaIconComponent]
})
export class FdRdEntryDialogComponent {
  private dialogRef = inject(MatDialogRef<FdRdEntryDialogComponent>);
  private snackBar = inject(MatSnackBar);

  bank = {
    name: 'CBSNexora Bank Ltd',
    branch: 'Head Office'
  };

  depositTypes: { code: DepositType; label: string; defaultRate: number }[] = [
    { code: 'FD-SINGLE', label: 'Fixed Deposit — Single A/c', defaultRate: 7.25 },
    { code: 'FD-JOINT', label: 'Fixed Deposit — Joint A/c', defaultRate: 7.25 },
    { code: 'RD-MONTHLY', label: 'Recurring Deposit — Monthly', defaultRate: 7.0 },
    { code: 'RD-QUARTERLY', label: 'Recurring Deposit — Quarterly', defaultRate: 7.0 }
  ];

  clients: DemoClient[] = [
    { id: 'C-10231', name: 'Ramesh Kumar Sharma' },
    { id: 'C-10344', name: 'Priya Enterprises' },
    { id: 'C-10412', name: 'Anjali Verma' },
    { id: 'C-10567', name: 'Suresh & Sons HUF' },
    { id: 'C-10689', name: 'Vikram Traders' }
  ];

  payModes = ['Cash', 'Cheque', 'Transfer from Savings A/c'];
  interestPayoutOptions = ['Cumulative (Paid on Maturity)', 'Monthly Payout', 'Quarterly Payout'];
  maturityInstructions = [
    'Renew Principal & Interest',
    'Renew Principal Only, Payout Interest',
    'Payout on Maturity (No Renewal)'
  ];

  depositType: DepositType = 'FD-SINGLE';
  clientId = '';
  principal: number | null = null;
  interestRate = 7.25;
  tenureYears = 1;
  tenureMonths = 0;
  tenureDays = 0;
  interestPayout = this.interestPayoutOptions[0];
  payMode = this.payModes[0];
  nomineeName = '';
  maturityInstruction = this.maturityInstructions[0];

  saved = false;
  lastAccountNo = '';
  lastClientName = '';

  get selectedClient(): DemoClient | undefined {
    return this.clients.find((c) => c.id === this.clientId);
  }

  onDepositTypeChange(): void {
    const dt = this.depositTypes.find((d) => d.code === this.depositType);
    if (dt) this.interestRate = dt.defaultRate;
  }

  get isRecurring(): boolean {
    return this.depositType.startsWith('RD');
  }

  get tenureInYears(): number {
    return this.tenureYears + this.tenureMonths / 12 + this.tenureDays / 365;
  }

  get maturityDate(): Date {
    const d = new Date();
    d.setFullYear(d.getFullYear() + this.tenureYears);
    d.setMonth(d.getMonth() + this.tenureMonths);
    d.setDate(d.getDate() + this.tenureDays);
    return d;
  }

  /** Quarterly-compounded maturity value, the standard FD/RD convention */
  get maturityAmount(): number {
    const p = this.principal || 0;
    const t = this.tenureInYears;
    if (p <= 0 || t <= 0) return 0;
    return p * Math.pow(1 + this.interestRate / 100 / 4, 4 * t);
  }

  get isValid(): boolean {
    return !!this.clientId && (this.principal ?? 0) > 0 && this.tenureInYears > 0;
  }

  save(): void {
    if (!this.isValid) return;
    const prefix = this.isRecurring ? 'RD' : 'FD';
    this.lastAccountNo = `${prefix}${Math.floor(1000000 + Math.random() * 8999999)}`;
    this.lastClientName = this.selectedClient?.name ?? '';
    this.saved = true;
    this.snackBar.open(`${prefix} account ${this.lastAccountNo} created for ${this.lastClientName}`, 'Close', {
      duration: 4000
    });
  }

  resetForm(): void {
    this.depositType = 'FD-SINGLE';
    this.clientId = '';
    this.principal = null;
    this.interestRate = 7.25;
    this.tenureYears = 1;
    this.tenureMonths = 0;
    this.tenureDays = 0;
    this.nomineeName = '';
    this.interestPayout = this.interestPayoutOptions[0];
    this.payMode = this.payModes[0];
    this.maturityInstruction = this.maturityInstructions[0];
    this.saved = false;
  }

  close(): void {
    this.dialogRef.close();
  }
}