import { useState } from "react";
import { Alert, Badge, Button, Modal, Stack, Table, Text } from "@mantine/core";
import { FileText } from "lucide-react";

import { useToast } from "@/hooks/use-toast";
import { warehouseService } from "@/services/warehouse.service";
import type { LastMileRecord } from "@/services/last-mile.service";
import { extractDownloadErrorMessage } from "@/components/warehouses/options";
import { openPdfBlob } from "@/components/warehouses/pdf";

interface EdrTruckExitPapersModalProps {
  opened: boolean;
  onClose: () => void;
  record: LastMileRecord | null;
}

const fmt = (value?: string | null) =>
  value ? new Date(value).toLocaleString() : "—";

/**
 * Per-truck exit papers for an EDR last-mile delivery. Each assigned truck has
 * its own arrival, exit and weighed load, so each gets its own paper.
 */
export function EdrTruckExitPapersModal({ opened, onClose, record }: EdrTruckExitPapersModalProps) {
  const { toast } = useToast();
  const [busyId, setBusyId] = useState<string | null>(null);
  const trucks = record?.vehicleAssignments ?? [];

  const download = async (assignmentId: string, plate: string) => {
    setBusyId(assignmentId);
    try {
      const res = await warehouseService.downloadEdrTruckExitPaper(assignmentId);
      openPdfBlob(res.data, `exit-${plate || assignmentId}.pdf`);
    } catch (e) {
      toast({
        variant: "destructive",
        title: "Exit paper not ready",
        description: await extractDownloadErrorMessage(e),
      });
    } finally {
      setBusyId(null);
    }
  };

  return (
    <Modal
      opened={opened}
      onClose={onClose}
      centered
      radius="lg"
      size="lg"
      title={
        <Text fw={600}>
          Truck exit papers {record?.booking?.reference ? `· ${record.booking.reference}` : ""}
        </Text>
      }
    >
      {trucks.length === 0 ? (
        <Alert variant="light" color="gray">
          No trucks assigned to this delivery yet.
        </Alert>
      ) : (
        <Stack gap="sm">
          <Table verticalSpacing="xs" highlightOnHover>
            <Table.Thead>
              <Table.Tr>
                <Table.Th>Truck</Table.Th>
                <Table.Th>Containers</Table.Th>
                <Table.Th>Arrived</Table.Th>
                <Table.Th>Left</Table.Th>
                <Table.Th ta="right">Net</Table.Th>
                <Table.Th ta="right">Exit paper</Table.Th>
              </Table.Tr>
            </Table.Thead>
            <Table.Tbody>
              {trucks.map((t) => {
                const plate = t.vehicle?.powerPlateNo || t.vehicle?.plateNumber || "—";
                const load = t.containers?.length
                  ? t.containers.map((c) => c.containerNumber).join(", ")
                  : (t.containerNumber ?? "bulk");
                return (
                  <Table.Tr key={t.id}>
                    <Table.Td>
                      <Text fw={600} size="sm">{plate}</Text>
                    </Table.Td>
                    <Table.Td>
                      <Text size="sm">{load}</Text>
                    </Table.Td>
                    <Table.Td>
                      <Text size="sm">{fmt(t.arrivedAt)}</Text>
                    </Table.Td>
                    <Table.Td>
                      {t.departedAt ? (
                        <Text size="sm">{fmt(t.departedAt)}</Text>
                      ) : (
                        <Badge size="sm" variant="light" color="gray">
                          Still on site
                        </Badge>
                      )}
                    </Table.Td>
                    <Table.Td ta="right">
                      <Text size="sm">
                        {t.netWeightTons != null ? `${t.netWeightTons} t` : "—"}
                      </Text>
                    </Table.Td>
                    <Table.Td ta="right">
                      <Button
                        size="compact-xs"
                        variant="light"
                        color="orange"
                        leftSection={<FileText size={13} />}
                        loading={busyId === t.id}
                        onClick={() => download(t.id, plate)}
                      >
                        Exit Paper
                      </Button>
                    </Table.Td>
                  </Table.Tr>
                );
              })}
            </Table.Tbody>
          </Table>
          <Text size="xs" c="dimmed">
            EDR handovers are generated at delivery, so an exit paper is not gated on a
            signature — warehouse-fee clearance still applies.
          </Text>
        </Stack>
      )}
    </Modal>
  );
}