/**
 * 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 } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { MatDialogRef, MatDialogModule, MAT_DIALOG_DATA } from '@angular/material/dialog';
import { MatButtonModule } from '@angular/material/button';
import { FaIconComponent } from '@fortawesome/angular-fontawesome';
import { DipLookupsService } from './dip-lookups.service';

/**
 * Records — or displays — the officer's decision on a flagged DIP/MNRL lookup.
 *
 * The same decision can be taken inline during onboarding; this is the back-office path for
 * numbers that were left undecided, and the read-only view once a decision exists.
 */
@Component({
  selector: 'mifosx-dip-decision-dialog',
  template: `
    <h2 mat-dialog-title>
      <fa-icon icon="satellite-dish" class="title-icon"></fa-icon>
      Mobile Lookup #{{ row.id }}
    </h2>
    <mat-dialog-content>
      <div class="detail-grid">
        <div class="detail-row">
          <span class="detail-label">Mobile Number</span>
          <span class="detail-value strong">{{ row.mobileNumber }}</span>
        </div>
        <div class="detail-row">
          <span class="detail-label">Status</span>
          <span class="detail-value" [class.danger]="row.lookupStatus !== 'CLEAN'">{{ row.lookupStatus }}</span>
        </div>
        <div class="detail-row">
          <span class="detail-label">Result</span>
          <span class="detail-value">{{ row.responseMessage || '—' }}</span>
        </div>
        <div class="detail-row">
          <span class="detail-label">Source</span>
          <span class="detail-value">{{ row.lookupSource || '—' }}</span>
        </div>
        <div class="detail-row">
          <span class="detail-label">Client</span>
          <span class="detail-value">
            @if (row.clientId) {
              {{ row.clientName || 'Client #' + row.clientId }}
              <span class="detail-sub">{{ row.clientAccountNo || row.clientId }}</span>
            } @else {
              Not onboarded
            }
          </span>
        </div>
        <div class="detail-row">
          <span class="detail-label">Looked Up</span>
          <span class="detail-value">{{ row.lookedUpOn | date: 'medium' }}</span>
        </div>
      </div>

      @if (row.overrideDecision) {
        <div class="section-title">Recorded Decision</div>
        <div class="decision-card" [class.decision-rejected]="row.overrideDecision === 'REJECTED'">
          <div class="decision-badge">
            {{ row.overrideDecision === 'PROCEEDED' ? 'PROCEEDED' : 'REJECTED' }}
          </div>
          <p class="decision-reason">{{ row.overrideReason || 'No reason recorded.' }}</p>
          <div class="decision-meta">
            Decided by user {{ row.decidedBy || '—' }} on {{ row.decidedOn | date: 'medium' }}
          </div>
        </div>
      } @else {
        <div class="section-title">Record a Decision</div>
        <div class="pending-note">
          <fa-icon icon="exclamation-circle"></fa-icon>
          This number is flagged and has not been decided. It cannot be saved on a client until an officer proceeds with
          reasons.
        </div>
        @if (showReasonForm) {
          <div class="reason-form">
            <label class="field-label">Why is this number acceptable despite the DIP/MNRL result?</label>
            <textarea
              class="field-input"
              rows="3"
              [(ngModel)]="reason"
              placeholder="e.g. Number re-issued to the applicant on 02/2026; ownership confirmed against the operator's CAF and a fresh OTP."
            ></textarea>
            <div class="field-hint" [class.field-error]="touched && !reasonValid">
              Minimum 10 characters — this reason is kept on the lookup record.
            </div>
          </div>
        }
      }

      @if (errorMessage) {
        <div class="error-note">{{ errorMessage }}</div>
      }
    </mat-dialog-content>
    <mat-dialog-actions align="end">
      <button mat-stroked-button (click)="close()" [disabled]="saving">Close</button>
      @if (!row.overrideDecision && !showReasonForm) {
        <button mat-stroked-button color="warn" (click)="reject()" [disabled]="saving">Reject Number</button>
        <button mat-raised-button color="primary" (click)="showReasonForm = true" [disabled]="saving">
          Proceed with Reason
        </button>
      }
      @if (!row.overrideDecision && showReasonForm) {
        <button mat-raised-button color="primary" (click)="proceed()" [disabled]="saving">
          {{ saving ? 'Saving…' : 'Save Decision' }}
        </button>
      }
    </mat-dialog-actions>
  `,
  styles: [
    `
      :host {
        display: block;
        min-width: 500px;
      }

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

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

      .detail-grid {
        background: #f9fafb;
        border: 1px solid #e5e7eb;
        border-radius: 8px;
        padding: 8px 14px;
      }

      .detail-row {
        display: flex;
        justify-content: space-between;
        gap: 16px;
        padding: 6px 0;
        border-bottom: 1px solid #f3f4f6;
      }

      .detail-row:last-child {
        border-bottom: none;
      }

      .detail-label {
        font-size: 12px;
        color: #9ca3af;
        font-weight: 500;
        white-space: nowrap;
      }

      .detail-value {
        font-size: 12px;
        color: #374151;
        font-weight: 600;
        text-align: right;
      }

      .detail-value.strong {
        color: #111827;
        font-size: 13px;
      }

      .detail-value.danger {
        color: #dc2626;
      }

      .detail-sub {
        display: block;
        font-size: 11px;
        font-weight: 400;
        color: #9ca3af;
      }

      .section-title {
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 0.6px;
        text-transform: uppercase;
        color: #6b7280;
        margin: 16px 0 6px;
      }

      .pending-note {
        display: flex;
        align-items: flex-start;
        gap: 8px;
        font-size: 13px;
        color: #92400e;
        background: #fffbeb;
        border: 1px solid #fde68a;
        border-radius: 6px;
        padding: 10px 12px;
        line-height: 1.5;
      }

      .decision-card {
        background: #ecfdf5;
        border: 1px solid #a7f3d0;
        border-left: 4px solid #059669;
        border-radius: 6px;
        padding: 10px 14px;
      }

      .decision-card.decision-rejected {
        background: #fef2f2;
        border-color: #fecaca;
        border-left-color: #dc2626;
      }

      .decision-badge {
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 1px;
        color: #059669;
      }

      .decision-rejected .decision-badge {
        color: #dc2626;
      }

      .decision-reason {
        font-size: 13px;
        color: #374151;
        line-height: 1.6;
        margin: 6px 0;
        white-space: pre-wrap;
      }

      .decision-meta {
        font-size: 11px;
        color: #9ca3af;
      }

      .reason-form {
        display: flex;
        flex-direction: column;
        gap: 4px;
        margin-top: 10px;
      }

      .field-label {
        font-size: 12px;
        font-weight: 600;
        color: #374151;
      }

      .field-input {
        width: 100%;
        box-sizing: border-box;
        font-family: inherit;
        font-size: 13px;
        padding: 8px 10px;
        border: 1px solid #d1d5db;
        border-radius: 4px;
        resize: vertical;
      }

      .field-input:focus {
        outline: none;
        border-color: #1074b9;
      }

      .field-hint {
        font-size: 11px;
        color: #9ca3af;
      }

      .field-error {
        color: #dc2626;
        font-weight: 600;
      }

      .error-note {
        font-size: 12px;
        font-weight: 600;
        color: #dc2626;
        background: #fef2f2;
        border: 1px solid #fecaca;
        border-radius: 6px;
        padding: 8px 12px;
        margin-top: 12px;
      }

      mat-dialog-actions {
        padding: 8px 24px 16px;
        gap: 8px;
      }
    `
  ],
  imports: [
    CommonModule,
    FormsModule,
    MatDialogModule,
    MatButtonModule,
    FaIconComponent
  ]
})
export class DipDecisionDialogComponent {
  private dialogRef = inject(MatDialogRef<DipDecisionDialogComponent>);
  private service = inject(DipLookupsService);

  row: any = inject(MAT_DIALOG_DATA);

  showReasonForm = false;
  reason = '';
  touched = false;
  saving = false;
  errorMessage = '';
  private changed = false;

  get reasonValid(): boolean {
    return this.reason.trim().length >= 10;
  }

  proceed() {
    this.touched = true;
    if (!this.reasonValid) {
      return;
    }
    this.save('PROCEEDED', this.reason.trim());
  }

  reject() {
    this.save('REJECTED', 'Number rejected on review of the DIP/MNRL result.');
  }

  private save(decision: string, reason: string) {
    this.saving = true;
    this.errorMessage = '';
    this.service.recordDecision(this.row.id, decision, reason).subscribe({
      next: (updated: any) => {
        this.saving = false;
        this.changed = true;
        this.row = updated || this.row;
        this.showReasonForm = false;
      },
      error: (err: any) => {
        this.saving = false;
        this.errorMessage =
          err?.error?.defaultUserMessage || err?.error?.message || err?.message || 'Could not save the decision.';
      }
    });
  }

  close() {
    this.dialogRef.close(this.changed);
  }
}