import { formatDateTime } from "../../utils/formatters";
import { Badge } from "../UI/Badge";

import { Panel } from "../UI/Panel";
import { SkeletonTable } from "../UI/Loading";
import { OrderFilters } from "./OrderFilters";
import {
  getOrderGroupDisplayStatusLabel,
  getOrderGroupStatusTone,
} from "../../services/orderGroupViews";

const MAX_VISIBLE_INVOICES = 2;

const TERMINAL_STATUSES = ["delivered", "picked_up", "cancelled"];

const fmtDate = (d) => {
  if (!d) return '';
  const [y, m, day] = d.split('-');
  if (!y || !m || !day) return d;
  return `${day}.${m}.${y}`;
};

const hasNoSms = (group) => {
  if (!group) return false;
  if (group.firstSmsSentAt) return false;
  if (TERMINAL_STATUSES.includes(group.deliveryStatus)) return false;
  return true;
};

const getDaysSinceCreation = (group) => {
  if (!group) return null;
  const ts = group.createdFromExchangeAt || group.createdAt || group.updatedAt;
  if (!ts) return null;
  const days = Math.floor((Date.now() - new Date(ts)) / 86400000);
  return days < 0 ? 0 : days;
};

const getDaysColorClass = (days) => {
  if (days == null) return "text-[var(--color-text-muted)]";
  if (days < 3) return "text-[var(--color-text)]";
  if (days <= 7) return "text-[var(--color-warning)]";
  return "text-[var(--color-danger)]";
};

const getShipmentIssues = (group) => {
  const data = group?.driverShipmentData;
  if (!Array.isArray(data) || data.length === 0) return null;
  const unshipped = data.filter((i) => !i.shipped);
  if (unshipped.length === 0) return null;
  return unshipped;
};

const buildGroupSummary = (group) => {
  const orderCountLabel = `${group.ordersCount || 0} ${group.ordersCount === 1 ? "заказ" : group.ordersCount < 5 ? "заказа" : "заказов"}`;
  const parts = [orderCountLabel];
  if (group.deliveryDate) {
    const datePart = group.deliveryTime ? `${fmtDate(group.deliveryDate)} · ${group.deliveryTime}` : fmtDate(group.deliveryDate);
    parts.push(datePart);
  }
  if (group.assignedDriverName) {
    parts.push(group.assignedDriverName);
  }

  return parts.join(" · ");
};

const renderOrderNumbers = (group) => {
  const numbers = group.allBillNumbers || group.orderNumbers;
  if (!Array.isArray(numbers) || !numbers.length) {
    return "Номера не указаны";
  }

  if (numbers.length <= MAX_VISIBLE_INVOICES) {
    return numbers.join(", ");
  }
  const visible = numbers.slice(0, MAX_VISIBLE_INVOICES);
  const remaining = numbers.length - MAX_VISIBLE_INVOICES;
  return `${visible.join(", ")} +${remaining}`;
};

const getDeliveryTypeLabel = (deliveryType) => {
  if (deliveryType === "pickup") return "Самовывоз";
  if (deliveryType === "delivery") return "Доставка";
  return "—";
};

const renderMobileOrderNumbers = (group) => {
  const numbers = group.allBillNumbers || group.orderNumbers;
  if (!Array.isArray(numbers) || !numbers.length) {
    return "Номера не указаны";
  }

  if (numbers.length <= MAX_VISIBLE_INVOICES) {
    return numbers.join(", ");
  }
  const visible = numbers.slice(0, MAX_VISIBLE_INVOICES);
  const remaining = numbers.length - MAX_VISIBLE_INVOICES;
  return (
    <>
      {visible.join(", ")}
      <span className="ml-1 rounded-full bg-[var(--color-accent-soft)] px-1.5 py-0.5 text-xs font-medium text-[var(--color-accent)]">+{remaining}</span>
    </>
  );
};

export const OrdersTable = ({
  orderGroups = [],
  selectedOrderGroupId,
  onOpenOrder,
  filters,
  setFilters,
  statusOptions,
  cities = [],
  isLoading = false,
}) => {
  if (isLoading) {
    return <SkeletonTable rows={5} cols={5} />;
  }

  return (
    <Panel className="p-0 fs-zone-table">
      <div className="space-y-4 border-b border-[var(--color-border)] px-5 py-4">
        <div className="flex items-start justify-between gap-4">
          <div>
            <h2 className="text-lg font-semibold">Группы доставки</h2>
            <p className="text-sm text-[var(--color-text-muted)]">
              Поиск по группе, клиенту, телефону и дате доставки.
            </p>
          </div>
          <Badge tone="neutral">{orderGroups.length}</Badge>
        </div>

        {filters && setFilters ? (
          <OrderFilters filters={filters} setFilters={setFilters} statusOptions={statusOptions} cities={cities} />
        ) : null}
      </div>

      <div className="space-y-3 p-4 md:hidden">
        {!orderGroups.length ? (
          <div className="rounded-[28px] border border-dashed border-[var(--color-border)] bg-[var(--color-surface-strong)] p-4 text-sm text-[var(--color-text-muted)]">
            Группы не найдены. Попробуйте изменить поиск или статус.
          </div>
        ) : null}
        {orderGroups.map((group) => {
          const hasProblem = group.hasDeliveryProblem;
          const noSms = hasNoSms(group);
          const days = getDaysSinceCreation(group);
          const baseClass = "w-full rounded-[22px] border text-left transition";
          const selectedClass = selectedOrderGroupId === group.id
            ? "border-[var(--color-accent)] bg-[var(--color-accent-soft)]"
            : hasProblem
            ? "border-[var(--color-danger)] bg-[rgba(201,61,61,0.1)]"
            : noSms
            ? "border-[var(--color-border)] bg-[rgba(245,158,11,0.05)]"
            : "border-[var(--color-border)] bg-[var(--color-surface-strong)]";

          const allNumbers = group.allBillNumbers || group.orderNumbers || [];
          const primaryBill = allNumbers[0] || "—";
          const totalCount = allNumbers.length;

          return (
            <div key={group.id}>
              <div className="mb-1 flex items-center gap-2 px-1 text-xs">
                <span className="font-medium text-[var(--color-text)]">№ {primaryBill}</span>
                {totalCount > 1 && (
                  <span className="rounded-full bg-[var(--color-accent-soft)] px-1.5 py-0.5 text-[10px] font-medium text-[var(--color-accent)]">
                    {totalCount} сч.
                  </span>
                )}
              </div>
              <button
                type="button"
                onClick={() => onOpenOrder(group.id)}
                className={[baseClass, selectedClass, "flex flex-col items-start justify-start p-4"].join(" ")}
              >
                <div className="min-w-0 w-full font-medium leading-snug break-words">
                  {group.displayTitle || group.customerName || group.groupKey}
                </div>
                <div className="mt-1.5 flex flex-wrap items-center gap-1.5">
                  <span className={`inline-flex items-center gap-1 rounded-full px-2.5 py-0.5 text-xs font-semibold ${group.deliveryType === "pickup" ? "bg-[var(--color-accent-soft)] text-[var(--color-accent)]" : "bg-[var(--color-surface-strong)] text-[var(--color-text-muted)]"}`}>
                    {group.deliveryType === "pickup" ? "🏪 Самовывоз" : "🚚 Доставка"}
                  </span>
                  <Badge tone={getOrderGroupStatusTone(group)}>
                    {getOrderGroupDisplayStatusLabel(group)}
                  </Badge>
                  {noSms && (
                    <span className="inline-flex items-center gap-1 rounded-full bg-[rgba(245,158,11,0.15)] px-2 py-0.5 text-[10px] font-medium text-[#d97706]" title="SMS не отправлено">
                      <span className="inline-block h-1.5 w-1.5 rounded-full bg-[#f59e0b]"></span>
                      SMS не отправлено
                    </span>
                  )}
                  {days != null && (
                    <span className={`inline-flex items-center rounded-full bg-[var(--color-surface-strong)] px-2 py-0.5 text-[10px] font-medium ${getDaysColorClass(days)}`}>
                      {days} дн
                    </span>
                  )}
                </div>

                {group.hasDeliveryProblem && (
                  <div className="mt-2 rounded-lg border border-[var(--color-warning)] bg-[var(--color-warning-soft)] px-2 py-1 text-xs">
                    <span className="font-medium text-[var(--color-warning)]">⚠ Проблема с доставкой</span>
                    {group.deliveryProblemNote && (
                      <div className="mt-0.5 text-[var(--color-text-muted)]">{group.deliveryProblemNote}</div>
                    )}
                  </div>
                )}
              </button>
            </div>
          );
        })}
      </div>

      <div className="hidden md:block">
        {!orderGroups.length ? (
          <div className="px-5 py-6 text-sm text-[var(--color-text-muted)]">
            Группы не найдены. Попробуйте изменить поиск или статус.
          </div>
        ) : (
          <div className="overflow-x-auto">
            <div className="min-w-[1180px]">
              <div className="grid grid-cols-[minmax(130px,2fr)_minmax(90px,1fr)_minmax(100px,0.8fr)_minmax(100px,1fr)_minmax(100px,1fr)_minmax(70px,0.5fr)_minmax(100px,0.8fr)_minmax(90px,0.8fr)] gap-0 border-b border-[var(--color-border)] bg-[var(--color-surface-strong)] text-xs uppercase tracking-[0.12em] text-[var(--color-text-muted)]">
                <div className="px-3 py-1.5 font-medium">Группа / Клиент</div>
                <div className="px-3 py-1.5 font-medium">Счета</div>
                <div className="px-3 py-1.5 font-medium">Город</div>
                <div className="px-3 py-1.5 font-medium">Статус</div>
                <div className="px-3 py-1.5 font-medium">Дата доставки</div>
                <div className="px-3 py-1.5 font-medium">Дней</div>
                <div className="px-3 py-1.5 font-medium">Тип</div>
                <div className="px-3 py-1.5 font-medium">Водитель</div>
              </div>
              {orderGroups.map((group) => {
                const hasProblem = group.hasDeliveryProblem;
                const noSms = hasNoSms(group);
                const days = getDaysSinceCreation(group);
                let rowBg = "";
                if (selectedOrderGroupId === group.id) {
                  rowBg = "bg-[var(--color-accent-soft)]";
                } else if (hasProblem) {
                  rowBg = "bg-[rgba(201,61,61,0.1)] hover:bg-[rgba(201,61,61,0.15)]";
                } else if (noSms) {
                  rowBg = "bg-[rgba(245,158,11,0.05)] hover:bg-[rgba(245,158,11,0.1)]";
                } else {
                  rowBg = "hover:bg-[var(--color-accent-soft)]";
                }
                const rowClassName = `grid grid-cols-[minmax(130px,2fr)_minmax(90px,1fr)_minmax(100px,0.8fr)_minmax(100px,1fr)_minmax(100px,1fr)_minmax(70px,0.5fr)_minmax(100px,0.8fr)_minmax(90px,0.8fr)] gap-0 w-full border-t border-[var(--color-border)] text-left transition ${rowBg}`;

                const billNumbers = group.allBillNumbers || group.orderNumbers || [];
                const primaryBill = billNumbers[0] || "—";
                const totalBills = billNumbers.length;

                return (
                  <button
                    key={group.id}
                    type="button"
                    className={rowClassName}
                    onClick={() => onOpenOrder(group.id)}
                  >
                    <div className="min-w-0 px-3 py-1.5">
                      <div className="text-xs font-medium leading-snug break-words" style={{display:"-webkit-box",WebkitLineClamp:2,WebkitBoxOrient:"vertical",overflow:"hidden"}}>{group.displayTitle || group.customerName || group.groupKey}</div>
                      <div className="mt-0.5 text-[11px] text-[var(--color-text-muted)]">
                        {group.customerPhone || ""}
                      </div>
                    </div>
                    <div className="px-3 py-1.5">
                      <div className="text-xs text-[var(--color-text)]">{primaryBill}</div>
                      {totalBills > 1 && (
                        <span className="inline-block mt-0.5 rounded-full bg-[var(--color-accent-soft)] px-1.5 py-0.5 text-[10px] font-medium text-[var(--color-accent)]">
                          {totalBills} сч.
                        </span>
                      )}
                    </div>
                    <div className="px-3 py-1.5 text-xs text-[var(--color-text-muted)]">
                      {group.city || "—"}
                    </div>
                    <div className="px-3 py-1.5">
                      <div className="flex flex-wrap items-center gap-1">
                        <Badge tone={getOrderGroupStatusTone(group)}>
                          {getOrderGroupDisplayStatusLabel(group)}
                        </Badge>
                        {noSms && (
                          <span className="inline-flex items-center gap-1 rounded-full bg-[rgba(245,158,11,0.15)] px-1.5 py-0.5 text-[10px] font-medium text-[#d97706]" title="SMS не отправлено">
                            <span className="inline-block h-1.5 w-1.5 rounded-full bg-[#f59e0b]"></span>
                            SMS
                          </span>
                        )}
                      </div>
                    </div>
                    <div className="px-3 py-1.5 text-xs">
                      {group.deliveryDate ? (
                        <span>{fmtDate(group.deliveryDate)}{group.deliveryTime ? <span className="text-[var(--color-text-muted)]"> · {group.deliveryTime}</span> : ""}</span>
                      ) : (
                        <span className="text-[var(--color-text-muted)]">—</span>
                      )}
                    </div>
                    <div className={`px-3 py-1.5 text-xs font-medium ${getDaysColorClass(days)}`}>
                      {days != null ? `${days} дн` : "—"}
                    </div>
                    <div className="px-3 py-1.5 text-xs">
                      <span className="inline-flex items-center gap-1">
                        {group.deliveryType === "pickup" ? "🏪" : "🚚"}
                        <span className="text-[var(--color-text-muted)]">{group.deliveryType === "pickup" ? "Самовывоз" : "Доставка"}</span>
                      </span>
                    </div>
                    <div className="px-3 py-1.5 text-xs">
                      {group.assignedDriverName || <span className="text-[var(--color-text-muted)]">—</span>}
                    </div>
                  </button>
                );
              })}
            </div>
          </div>
        )}
      </div>
    </Panel>
  );
};