import type { CSSProperties } from 'react';
import { formatDate, formatRial } from '../lib/utils';
import { FilesServiceSuccess, FilesServiceMore } from './icons/FilesServiceIcons';

export interface SessionPaymentEntry {
  uuid: string;
  method: string;
  amount_rials: number;
  paid_at?: number;
  created_by_name?: string | null;
}

export interface SessionCardData {
  uuid: string;
  services?: Array<{ service_name?: string; name?: string; line_total_rials?: number; price_rials?: number; quantity?: number }>;
  visit_price_rials?: number;
  services_total_rials?: number;
  session_at?: number | null;
  doctor_name?: string | null;
  final_price_rials?: number;
  patient_debt_rials?: number;
  is_paid?: boolean;
  invoice_uuid?: string | null;
  notes?: string | null;
  created_at?: number;
  // تسویه چندتکه + تخفیف (backend session settlement fields)
  discount_type?: 'percent' | 'fixed' | null;
  discount_value?: number;
  discount_rials?: number;
  applied_discount_rule_label?: string | null;
  paid_total_rials?: number;
  paid_at?: number | null;
  payments?: SessionPaymentEntry[];
}

/** label:value row inside the service card (mirrors tauri ServiceInfoRow). */
function Row({ label, value, valueStyle }: { label: string; value: string; valueStyle?: CSSProperties }) {
  return (
    <div style={{ display: 'flex', alignItems: 'flex-start', justifyContent: 'space-between', gap: 6, margin: '6px 0' }}>
      <span style={{ fontSize: 12, color: '#616161' }} className="dark:text-[#A1A1A1]">{label}:</span>
      <span style={{ fontSize: 14, color: '#525252', textAlign: 'left', ...valueStyle }} className="dark:text-[#D7D8ED]">{value}</span>
    </div>
  );
}

/**
 * A patient «مراجعه» (session) card — visit + performed services — ported
 * pixel-for-pixel from tauri files/services/ServiceCard. Paid cards show
 * «مشاهده فاکتور», unpaid ones «تکمیل پرداخت».
 */
export default function SessionServiceCard({ session, onSettle, onViewInvoice, settling, issuing }: {
  session: SessionCardData;
  onSettle: (uuid: string) => void;
  /** کل session پاس می‌شود؛ اگر invoice_uuid نداشت، caller فاکتور را می‌سازد. */
  onViewInvoice: (session: SessionCardData) => void;
  settling?: boolean;
  /** true وقتی صدور فاکتور همین لحظه در جریان است (دکمه قفل می‌شود). */
  issuing?: boolean;
}) {
  const paid = !!session.is_paid;
  const names = (session.services ?? []).map((s) => s.service_name || s.name).filter(Boolean) as string[];
  if ((session.visit_price_rials ?? 0) > 0) names.unshift('ویزیت');
  // A «مراجعه» = the visit plus the services performed in it.
  const title = 'مراجعه';
  const subtitle = names.length ? names.join(' - ') : 'ویزیت';
  const debt = session.patient_debt_rials ?? 0;

  return (
    <div
      className="bg-white dark:bg-[#222433] border border-[#EDEDED] dark:border-[#35343D]"
      style={{ minWidth: 277, minHeight: 331, borderRadius: 12, padding: 14, display: 'flex', flexDirection: 'column', gap: 10, overflow: 'hidden', boxShadow: '0 1px 6px rgba(15,23,42,0.06)' }}
    >
      <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: 2 }}>
        <div style={{ display: 'flex', alignItems: 'center', gap: 8, minWidth: 0 }}>
          <FilesServiceSuccess />
          <div style={{ display: 'flex', flexDirection: 'column', alignItems: 'flex-start', gap: 3, minWidth: 0 }}>
            <span className="dark:text-[#D7D8ED]" style={{ fontSize: 14, fontWeight: 600, color: '#525252', whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis', maxWidth: 180 }}>{title}</span>
            <span className="dark:text-[#A1A1A1]" style={{ fontSize: 12, color: '#6B7280', whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis', maxWidth: 200 }}>{subtitle}</span>
          </div>
        </div>
        <FilesServiceMore style={{ color: '#9CA3AF', flexShrink: 0 }} />
      </div>

      <div className="dark:border-[#35343D]" style={{ borderTop: '1px solid #F1F1F1' }} />

      <div style={{ display: 'flex', flexDirection: 'column', flex: 1, minHeight: 0, overflow: 'hidden', lineHeight: 1.9 }}>
        <Row label="انجام دهنده" value={session.doctor_name || '—'} />
        <Row label="تاریخ" value={session.created_at ? formatDate(session.created_at) : '—'} />
        <Row label="توضیحات" value={session.notes || '—'} valueStyle={{ display: 'flex', textAlign: 'right', width: '100%' }} />
      </div>

      <div className="dark:border-[#35343D]" style={{ borderTop: '1px solid #F1F1F1' }} />

      <div style={{ display: 'flex', flexDirection: 'column', width: '100%' }}>
        <Row label="هزینه" value={formatRial(session.final_price_rials ?? 0)} valueStyle={{ fontWeight: 500 }} />
        {!paid && <Row label="مانده بدهی" value={formatRial(debt)} valueStyle={{ color: '#EF4444', fontWeight: 500 }} />}
      </div>

      <div style={{ marginTop: 'auto' }}>
        {paid ? (
          <button
            type="button"
            disabled={issuing}
            onClick={() => onViewInvoice(session)}
            style={{ marginTop: 8, height: 40, width: '100%', borderRadius: 4, fontSize: 13, fontWeight: 500, cursor: 'pointer', color: '#4F46E5', background: 'transparent', border: '1px solid #5559ce' }}
          >
            {issuing ? 'در حال صدور…' : 'مشاهده فاکتور'}
          </button>
        ) : (
          <button
            type="button"
            disabled={settling}
            onClick={() => onSettle(session.uuid)}
            style={{ marginTop: 8, height: 40, width: '100%', borderRadius: 4, fontSize: 13, fontWeight: 500, cursor: 'pointer', color: '#fff', background: '#5559ce', border: '1px solid #5559ce' }}
          >
            تکمیل پرداخت
          </button>
        )}
      </div>
    </div>
  );
}