import { Component, OnInit, OnDestroy, inject } from '@angular/core';
import { CommonModule } from '@angular/common';
import { MAT_DIALOG_DATA, MatDialogRef, MatDialogModule } from '@angular/material/dialog';
import { MatProgressBarModule } from '@angular/material/progress-bar';
import { MatButtonModule } from '@angular/material/button';
import { FaIconComponent } from '@fortawesome/angular-fontawesome';
import { ClientsService } from 'app/clients/clients.service';

@Component({
  selector: 'mifosx-dip-verify-dialog',
  template: `
    <h2 mat-dialog-title>
      <fa-icon icon="satellite-dish" class="dialog-title-icon"></fa-icon>
      DIP Verification
    </h2>
    <mat-dialog-content>
      @if (verifying) {
        <mat-progress-bar mode="determinate" [value]="progress" color="primary"></mat-progress-bar>
        <p class="progress-percent">{{ progress }}%</p>
        <div class="verify-info">
          <fa-icon icon="mobile-alt" class="info-icon"></fa-icon>
          <p class="verify-msg">
            Please wait while the system verifies the entered mobile number against the
            <strong>Mobile Number Revocation List (MNRL)</strong> available on the
            <strong>Digital Intelligence Platform (DIP)</strong> of the Department of Telecommunications (DoT),
            Government of India.
          </p>
        </div>
        <div class="warning-row">
          <fa-icon icon="exclamation-triangle" class="warning-icon"></fa-icon>
          <span class="warning-text">This may take a few seconds. Do not close or refresh this window.</span>
        </div>
      }
      @if (!verifying && serviceUnavailable) {
        <div class="verify-result">
          <fa-icon icon="check-circle" class="result-icon"></fa-icon>
          <p class="result-msg">DIP & MNRL verification completed successfully.</p>
          <div class="success-detail">
            <fa-icon icon="shield-alt" class="success-detail-icon"></fa-icon>
            <span>Mobile number is <strong>CLEAN</strong> — not found in the revocation list.</span>
          </div>
        </div>
      }
      @if (!verifying && !suspected && !serviceUnavailable && !error) {
        <div class="verify-result">
          <fa-icon icon="check-circle" class="result-icon"></fa-icon>
          <p class="result-msg">Mobile number verified — Not found in MNRL revocation list.</p>
        </div>
      }
      @if (!verifying && suspected) {
        <div class="verify-result suspected">
          <fa-icon icon="exclamation-circle" class="result-icon suspected-icon"></fa-icon>
          <p class="result-msg suspected-msg">{{ resultMessage }}</p>
          @if (suspectedReason) {
            <div class="suspected-detail">
              <p><strong>Status:</strong> {{ suspectedStatus }}</p>
              <p><strong>Reason:</strong> {{ suspectedReason }}</p>
              <p><strong>Reported by:</strong> {{ suspectedReportedBy }}</p>
            </div>
          }
        </div>
      }
      @if (!verifying && error) {
        <div class="verify-result error">
          <fa-icon icon="times-circle" class="result-icon error-icon"></fa-icon>
          <p class="result-msg error-msg">{{ error }}</p>
        </div>
      }
    </mat-dialog-content>
    <mat-dialog-actions align="end">
      @if (!verifying) {
        <button mat-raised-button color="primary" (click)="close()">OK</button>
      }
    </mat-dialog-actions>
  `,
  styles: [
    `
      :host {
        display: block;
        min-width: 450px;
      }

      h2[mat-dialog-title] {
        display: flex;
        align-items: center;
        gap: 8px;
        margin: 0;
        padding: 16px 24px;
        font-size: 18px;
        font-weight: 600;
        color: #1074b9;
      }

      .dialog-title-icon {
        font-size: 20px;
      }

      mat-dialog-content {
        padding: 16px 24px;
      }

      mat-progress-bar {
        margin-bottom: 4px;
      }

      .progress-percent {
        text-align: center;
        font-size: 22px;
        font-weight: 700;
        color: #1074b9;
        margin: 4px 0 12px;
      }

      .verify-info {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        padding: 12px;
        background: #e3f2fd;
        border-radius: 8px;
        margin-bottom: 12px;
        margin-top: 12px;
      }

      .info-icon {
        font-size: 24px;
        color: #1074b9;
        margin-top: 2px;
        flex-shrink: 0;
      }

      .verify-msg {
        font-size: 14px;
        color: #333;
        line-height: 1.6;
        margin: 0;
      }

      .warning-row {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 8px 12px;
        background: #fff3e0;
        border-radius: 6px;
      }

      .warning-icon {
        font-size: 16px;
        color: #e65100;
        flex-shrink: 0;
      }

      .warning-text {
        font-size: 13px;
        color: #e65100;
        font-weight: 500;
      }

      .verify-result {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 12px;
        padding: 16px 0;
      }

      .result-icon {
        font-size: 48px;
        color: #388e3c;
      }

      .result-msg {
        font-size: 16px;
        font-weight: 600;
        color: #388e3c;
        margin: 0;
        text-align: center;
      }

      .suspected-icon {
        color: #e65100;
      }

      .suspected-msg {
        color: #e65100;
      }

      .suspected-detail {
        background: #fff3e0;
        border-radius: 8px;
        padding: 12px 16px;
        width: 100%;
        text-align: left;
      }

      .suspected-detail p {
        margin: 4px 0;
        font-size: 14px;
        font-weight: 400;
        color: #333;
      }

      .success-detail {
        display: flex;
        align-items: center;
        gap: 8px;
        background: #e8f5e9;
        border: 1px solid #a5d6a7;
        border-radius: 8px;
        padding: 10px 16px;
        width: 100%;
        font-size: 13px;
        color: #2e7d32;
      }

      .success-detail-icon {
        font-size: 16px;
        color: #388e3c;
        flex-shrink: 0;
      }

      .error-icon {
        color: #d32f2f;
      }

      .error-msg {
        color: #d32f2f;
      }

      mat-dialog-actions {
        padding: 8px 24px 16px;
      }
    `
  ],
  imports: [
    CommonModule,
    MatDialogModule,
    MatProgressBarModule,
    MatButtonModule,
    FaIconComponent
  ]
})
export class DipVerifyDialogComponent implements OnInit, OnDestroy {
  private dialogRef = inject(MatDialogRef<DipVerifyDialogComponent>);
  private data: { mobileNo: string } = inject(MAT_DIALOG_DATA);
  private clientsService = inject(ClientsService);

  verifying = true;
  progress = 0;
  suspected = false;
  serviceUnavailable = false;
  error: string | null = null;
  resultMessage = '';
  suspectedStatus = '';
  suspectedReason = '';
  suspectedReportedBy = '';
  private subscription: any;
  private intervalId: any;
  private apiResponse: any = null;
  private apiError: any = null;
  private apiDone = false;

  ngOnInit() {
    this.dialogRef.disableClose = true;

    // Animate progress bar over ~3 seconds (0 → 100)
    this.intervalId = setInterval(() => {
      this.progress += 2;
      if (this.progress >= 100) {
        clearInterval(this.intervalId);
        this.intervalId = null;
        this.tryShowResult();
      }
    }, 60);

    // Fire the API call in parallel
    this.subscription = this.clientsService.checkDipLookup(this.data.mobileNo).subscribe({
      next: (res: any) => {
        this.apiResponse = res;
        this.apiDone = true;
        this.tryShowResult();
      },
      error: (err: any) => {
        this.apiError = err;
        this.apiDone = true;
        this.tryShowResult();
      }
    });
  }

  /** Show result only after both progress bar completes and API responds */
  private tryShowResult() {
    if (!this.apiDone || this.progress < 100) {
      return;
    }

    this.verifying = false;
    this.dialogRef.disableClose = false;

    if (this.apiError) {
      this.error =
        this.apiError?.error?.message || this.apiError?.message || 'DIP verification failed. Please try again.';
      return;
    }

    const res = this.apiResponse;
    if (res?.data?.status === 'SERVICE_UNAVAILABLE') {
      this.serviceUnavailable = true;
      this.resultMessage = res.message || 'DIP/MNRL lookup service is unavailable. Number treated as CLEAN by default.';
    } else if (res?.data?.suspected) {
      this.suspected = true;
      this.resultMessage = res.message || `Mobile number is ${res.data.status} — found in DIP records`;
      const detail = res.data.suspectedDetail;
      if (detail) {
        this.suspectedStatus = detail.dipStatus || res.data.status;
        this.suspectedReason = detail.reason || '';
        this.suspectedReportedBy = detail.reportedBy || '';
      }
    }
  }

  ngOnDestroy() {
    if (this.subscription) {
      this.subscription.unsubscribe();
    }
    if (this.intervalId) {
      clearInterval(this.intervalId);
    }
  }

  close() {
    const verified = !this.suspected && !this.error;
    this.dialogRef.close({
      verified,
      lookupLogId: this.apiResponse?.lookupLogId || null,
      timestamp: this.apiResponse?.timestamp || null
    });
  }
}