import { createFileRoute } from "@tanstack/react-router";
import { useState } from "react";
import { CommandSubmitTemplate } from "@/template/command-submit-template";
import { CommandRegistryForm, type CommandRegistryFormData } from "@/components/forms/command-registry-form";
import {
  useGetCommandList,
  useGetRoomList,
  useAddCommand,
  useUpdateCommand,
  useDeleteCommand,
  useSendCommand,
} from "@/hooks/queries";
import { toast } from "sonner";
import { Check, X, Edit2, Trash2 } from "lucide-react";
import { Button } from "@/components/ui/button";
import type { ColumnDef } from "@tanstack/react-table";
import type { ShellCommandData } from "@/components/forms/command-form";
import type { CommandRegistry } from "@/types/command-registry";

export const Route = createFileRoute("/_auth/commands/")({
  head: () => ({ meta: [{ title: "Gửi lệnh từ xa" }] }),
  component: CommandPage,
  loader: async ({ context }) => {
    // Read active tab from URL search params (client-side) to reflect breadcrumb
    let activeTab = "list";
    try {
      if (typeof window !== "undefined") {
        const params = new URLSearchParams(window.location.search);
        activeTab = params.get("tab") || "list";
      }
    } catch (e) {
      activeTab = "list";
    }

    context.breadcrumbs = [
      { title: "Quản lý lệnh", path: "/_auth/commands/" },
      {
        title: activeTab === "execute" ? "Lệnh thủ công" : "Danh sách",
        path: `/ _auth/commands/?tab=${activeTab}`,
      },
    ];
  },
});

function CommandPage() {
  const [isDialogOpen, setIsDialogOpen] = useState(false);
  const [selectedCommand, setSelectedCommand] = useState<CommandRegistry | null>(null);
  const [table, setTable] = useState<any>();

  // Fetch commands
  const { data: commands = [], isLoading } = useGetCommandList();

  // Fetch rooms
  const { data: roomData = [] } = useGetRoomList();

  const commandList: CommandRegistry[] = Array.isArray(commands) 
    ? commands.map((cmd: any) => ({
        ...cmd,
        qoS: cmd.qoS ?? 0,
        isRetained: cmd.isRetained ?? false,
      }))
    : [];

  // Mutations
  const addCommandMutation = useAddCommand();
  const updateCommandMutation = useUpdateCommand();
  const deleteCommandMutation = useDeleteCommand();
  const sendCommandMutation = useSendCommand();

  // Columns for command table
  const columns: ColumnDef<CommandRegistry>[] = [
    {
      accessorKey: "commandName",
      header: "Tên lệnh",
      size: 100,
      cell: ({ getValue }) => (
        <div className="max-w-[100px]">
          <span className="font-semibold truncate block">{getValue() as string}</span>
        </div>
      ),
    },
    {
      accessorKey: "commandType",
      header: "Loại lệnh",
      cell: ({ getValue }) => {
        const type = getValue() as number;
        const typeMap: Record<number, string> = {
          1: "RESTART",
          2: "SHUTDOWN",
          3: "TASKKILL",
          4: "BLOCK",
        };
        return <span>{typeMap[type] || "UNKNOWN"}</span>;
      },
    },
    {
      accessorKey: "description",
      header: "Mô tả",
      size: 120,
      cell: ({ getValue }) => (
        <div className="max-w-[120px]">
          <span className="text-sm text-muted-foreground truncate block">
            {(getValue() as string) || "-"}
          </span>
        </div>
      ),
    },
    {
      accessorKey: "commandContent",
      header: "Nội dung lệnh",
      size: 130,
      cell: ({ getValue }) => (
        <div className="max-w-[130px]">
          <code className="text-xs bg-muted/50 px-1.5 py-0.5 rounded truncate block">
            {(getValue() as string).substring(0, 40)}...
          </code>
        </div>
      ),
    },
    {
      accessorKey: "qoS",
      header: "QoS",
      cell: ({ getValue }) => {
        const qos = getValue() as number | undefined;
        const qosValue = qos !== undefined ? qos : 0;
        const colors = {
          0: "text-blue-600",
          1: "text-amber-600",
          2: "text-red-600",
        };
        return (
          <span className={colors[qosValue as 0 | 1 | 2]}>{qosValue}</span>
        );
      },
    },
    {
      accessorKey: "isRetained",
      header: "Lưu trữ",
      cell: ({ getValue }) => {
        const retained = getValue() as boolean;
        return retained ? (
          <div className="flex items-center gap-1">
            <Check className="h-4 w-4 text-green-600" />
            <span className="text-sm text-green-600">Có</span>
          </div>
        ) : (
          <div className="flex items-center gap-1">
            <X className="h-4 w-4 text-gray-400" />
            <span className="text-sm text-gray-400">Không</span>
          </div>
        );
      },
    },
    {
      id: "select",
      header: () => <div className="text-center text-xs">Chọn để thực thi</div>,
      cell: ({ row }) => (
        <input
          type="checkbox"
          checked={row.getIsSelected?.() ?? false}
          onChange={row.getToggleSelectedHandler?.()}
        />
      ),
      enableSorting: false,
      enableHiding: false,
    },
    {
      id: "actions",
      header: () => <div className="text-center text-xs">Hành động</div>,
      cell: ({ row }) => (
        <div className="flex gap-2 justify-center">
          <Button
            size="sm"
            variant="ghost"
            onClick={(e) => {
              e.stopPropagation();
              setSelectedCommand(row.original);
              setIsDialogOpen(true);
            }}
          >
            <Edit2 className="h-4 w-4" />
          </Button>
          <Button
            size="sm"
            variant="ghost"
            onClick={(e) => {
              e.stopPropagation();
              handleDeleteCommand(row.original.id);
            }}
            disabled={deleteCommandMutation.isPending}
          >
            <Trash2 className="h-4 w-4 text-red-500" />
          </Button>
        </div>
      ),
      enableSorting: false,
      enableHiding: false,
    },
  ];

  // Handle form submit
  const handleFormSubmit = async (data: CommandRegistryFormData) => {
    try {
      if (selectedCommand) {
        // Update
        await updateCommandMutation.mutateAsync({
          commandId: selectedCommand.id,
          data,
        });
      } else {
        // Add
        await addCommandMutation.mutateAsync(data);
      }
      setIsDialogOpen(false);
      setSelectedCommand(null);
      toast.success(selectedCommand ? "Cập nhật lệnh thành công!" : "Thêm lệnh thành công!");
    } catch (error) {
      console.error("Form submission error:", error);
      toast.error(selectedCommand ? "Cập nhật lệnh thất bại!" : "Thêm lệnh thất bại!");
    }
  };

  // Handle delete
  const handleDeleteCommand = async (commandId: number) => {
    if (!confirm("Bạn có chắc muốn xóa lệnh này?")) return;

    try {
      await deleteCommandMutation.mutateAsync(commandId);
      toast.success("Xóa lệnh thành công!");
    } catch (error) {
      console.error("Delete error:", error);
      toast.error("Xóa lệnh thất bại!");
    }
  };

  // Handle execute commands from list
  const handleExecuteSelected = async (targets: string[]) => {
    if (!table) {
      toast.error("Không thể lấy thông tin bảng!");
      return;
    }

    const selectedRows = table.getSelectedRowModel().rows;
    if (selectedRows.length === 0) {
      toast.error("Vui lòng chọn ít nhất một lệnh để thực thi!");
      return;
    }

    try {
      for (const target of targets) {
        for (const row of selectedRows) {
          // API expects PascalCase directly
          const apiData = {
            Command: row.original.commandContent,
            QoS: row.original.qoS,
            IsRetained: row.original.isRetained,
          };

          await sendCommandMutation.mutateAsync({
            roomName: target,
            data: apiData as any,
          });
        }
      }
      toast.success("Đã gửi yêu cầu thực thi lệnh cho các mục đã chọn!");
      if (table) {
        table.setRowSelection({});
      }
    } catch (error) {
      toast.error("Có lỗi xảy ra khi thực thi!");
    }
  };

  // Handle execute custom command
  const handleExecuteCustom = async (targets: string[], commandData: ShellCommandData) => {
    try {
      for (const target of targets) {
        // API expects PascalCase directly
        const apiData = {
          Command: commandData.command,
          QoS: commandData.qos,
          IsRetained: commandData.isRetained,
        };
        await sendCommandMutation.mutateAsync({
          roomName: target,
          data: apiData as any,
        });
      }
      toast.success("Đã gửi lệnh tùy chỉnh cho các mục đã chọn!");
    } catch (error) {
      toast.error("Gửi lệnh tùy chỉnh thất bại!");
    }
  };

  return (
    <>
      <CommandSubmitTemplate
        title="Gửi lệnh từ xa"
        description="Quản lý và gửi yêu cầu thực thi các lệnh trên thiết bị"
        data={commandList}
        isLoading={isLoading}
        columns={columns}
        dialogOpen={isDialogOpen}
        onDialogOpen={setIsDialogOpen}
        dialogTitle={selectedCommand ? "Sửa Lệnh" : "Thêm Lệnh Mới"}
        onAddNew={() => {
          setSelectedCommand(null);
          setIsDialogOpen(true);
        }}
        onTableInit={setTable}
        formContent={
          <CommandRegistryForm
            onSubmit={handleFormSubmit}
            closeDialog={() => setIsDialogOpen(false)}
            initialData={selectedCommand || undefined}
            title={selectedCommand ? "Sửa Lệnh" : "Thêm Lệnh Mới"}
          />
        }
        onExecuteSelected={handleExecuteSelected}
        onExecuteCustom={handleExecuteCustom}
        isExecuting={sendCommandMutation.isPending}
        rooms={roomData}
        scrollable={true}
        maxHeight="500px"
        enablePagination={false}
        defaultPageSize={10}
      />
    </>
  );
}