import type { ReactNode } from "react";
import { Badge, Stack, Tabs, Text } from "@mantine/core";
import { AlertTriangle, FileText, Receipt, Share2, ShieldAlert } from "lucide-react";
import type { Freight } from "@edr/types";

import { useAuth } from "@/auth/useAuth";
import { FREIGHT_PERMS, hasPermission } from "@/lib/permissions";
import { SectionCard } from "@/components/bookings/detail/SectionCard";
import { AssignRiskCard } from "@/components/contracts/gl-actions/AssignRiskCard";
import { IncidentReportCard } from "@/components/contracts/gl-actions/IncidentReportCard";
import { ClearanceUploadedDocumentsPanel } from "@/components/contracts/ClearanceUploadedDocumentsPanel";
import { ClearanceChargesTab } from "@/components/contracts/ClearanceChargesTab";
import { GlExchangePanel } from "@/components/contracts/GlExchangePanel";

export interface ClearanceOpsTabsProps {
  bookingId: string | undefined;
  milestones?: Freight.IClearanceMilestone[];
  /** When false, only the clearance tab content is rendered (no tab bar). */
  showOpsTabs?: boolean;
  clearanceTab: ReactNode;
  /** Phased customs workflow files — enables the Uploaded documents tab. */
  workflowFiles?: Freight.ClearanceWorkflowFile[];
  showWorkflowFilesTab?: boolean;
  /**
   * Booking or contract id whose GL Ethiopia ↔ GL Djibouti document exchange
   * belongs on this page. Undefined hides the tab; it is also hidden from staff
   * who hold neither desk's clearance-actions permission.
   */
  exchangeEntityId?: string;
  tradeDirection?: string;
  onViewFile?: (file: { name: string; url: string }) => void;
  onDownloadFile?: (file: { id: string; name: string }) => void;
}

function findMilestone(
  milestones: Freight.IClearanceMilestone[] | undefined,
  code: string,
): Freight.IClearanceMilestone | undefined {
  return milestones?.find((m) => m.milestoneCode === code);
}

/**
 * Document Clearance detail layout: primary clearance workflow plus optional
 * uploaded documents, post-booking risk assignment, and incident reporting tabs.
 */
export function ClearanceOpsTabs({
  bookingId,
  milestones,
  showOpsTabs = true,
  clearanceTab,
  workflowFiles = [],
  showWorkflowFilesTab = false,
  exchangeEntityId,
  tradeDirection = "IMPORT",
  onViewFile,
  onDownloadFile,
}: ClearanceOpsTabsProps) {
  const riskMs = findMilestone(milestones, "RISK_ASSIGNED");
  const hasOps = Boolean(bookingId);
  const isExport = tradeDirection === "EXPORT";
  const uploadedDocCount = workflowFiles.filter((f) => {
    if (!f.file) return false;
    if (isExport) return f.category !== "duty";
    return true;
  }).length;
  const showDocuments = showWorkflowFilesTab && Boolean(onViewFile);
  const { user } = useAuth();
  const showExchange =
    Boolean(exchangeEntityId) &&
    (hasPermission(user, FREIGHT_PERMS.contracts.clearanceEtActions) ||
      hasPermission(user, FREIGHT_PERMS.contracts.clearanceDjActions));
  // Post-finalization customer billing. This layout is only rendered on the ET
  // clearance pages — the DJ page (GlClearanceDetailPage) mounts its own tab.
  const showCharges =
    Boolean(bookingId) &&
    Boolean(onViewFile) &&
    hasPermission(user, FREIGHT_PERMS.contracts.clearanceEtActions);
  // Risk assignment + incident reporting hit bookings:operations endpoints.
  const canOps = hasPermission(user, FREIGHT_PERMS.bookings.operations);
  const hasTabs = (showOpsTabs && hasOps) || showDocuments || showExchange;

  if (!hasTabs) {
    return <>{clearanceTab}</>;
  }

  return (
    <Tabs defaultValue="clearance" keepMounted={false}>
      <Tabs.List mb="md">
        <Tabs.Tab value="clearance">Clearance</Tabs.Tab>
        {showDocuments ? (
          <Tabs.Tab
            value="documents"
            leftSection={<FileText size={14} />}
            rightSection={
              uploadedDocCount > 0 ? (
                <Badge size="xs" variant="light" color="edr-green" circle>
                  {uploadedDocCount}
                </Badge>
              ) : undefined
            }
          >
            Uploaded documents
          </Tabs.Tab>
        ) : null}
        {showExchange ? (
          <Tabs.Tab value="exchange" leftSection={<Share2 size={14} />}>
            Document exchange
          </Tabs.Tab>
        ) : null}
        {showCharges ? (
          <Tabs.Tab value="charges" leftSection={<Receipt size={14} />}>
            Customer charges
          </Tabs.Tab>
        ) : null}
        {showOpsTabs && canOps && riskMs ? (
          <Tabs.Tab value="risk" leftSection={<ShieldAlert size={14} />}>
            Risk assignment
          </Tabs.Tab>
        ) : null}
        {showOpsTabs && canOps && bookingId ? (
          <Tabs.Tab value="incidents" leftSection={<AlertTriangle size={14} />}>
            Incidents
          </Tabs.Tab>
        ) : null}
      </Tabs.List>

      <Tabs.Panel value="clearance">{clearanceTab}</Tabs.Panel>

      {showDocuments ? (
        <Tabs.Panel value="documents">
          <ClearanceUploadedDocumentsPanel
            files={workflowFiles}
            tradeDirection={tradeDirection}
            onView={onViewFile!}
            onDownload={onDownloadFile}
          />
        </Tabs.Panel>
      ) : null}

      {showExchange ? (
        <Tabs.Panel value="exchange">
          <GlExchangePanel entityId={exchangeEntityId!} />
        </Tabs.Panel>
      ) : null}

      {showCharges ? (
        <Tabs.Panel value="charges">
          <ClearanceChargesTab
            bookingId={bookingId!}
            roleMode="ET"
            onViewFile={onViewFile!}
          />
        </Tabs.Panel>
      ) : null}

      {showOpsTabs && canOps && riskMs && bookingId ? (
        <Tabs.Panel value="risk">
          <SectionCard icon={ShieldAlert} title="Customs risk" accent="edr-green">
            <AssignRiskCard bookingId={bookingId} milestone={riskMs} />
          </SectionCard>
        </Tabs.Panel>
      ) : null}

      {showOpsTabs && canOps && bookingId ? (
        <Tabs.Panel value="incidents">
          <SectionCard icon={AlertTriangle} title="Incident reports" accent="edr-green">
            <Stack gap="sm">
              <Text size="sm" c="dimmed">
                Log container or seal issues discovered during clearance handling.
              </Text>
              <IncidentReportCard bookingId={bookingId} />
            </Stack>
          </SectionCard>
        </Tabs.Panel>
      ) : null}
    </Tabs>
  );
}