import { X, Check } from "lucide-react";
import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from "@/components/ui/dialog";
import { Checkbox } from "@/components/ui/checkbox";
import { Button } from "@/components/ui/button";
import { cn } from "@/lib/utils";
import { ALL_COLUMNS, COLUMN_GROUPS, DEFAULT_VISIBLE_COLUMNS } from "@/lib/config/placement-columns";

interface ColumnSelectorDialogProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  visibleColumns: Set<string>;
  onVisibleColumnsChange: (columns: Set<string>) => void;
}

export function ColumnSelectorDialog({
  open,
  onOpenChange,
  visibleColumns,
  onVisibleColumnsChange,
}: ColumnSelectorDialogProps) {
  const handleToggleColumn = (columnId: string) => {
    const next = new Set(visibleColumns);
    if (next.has(columnId)) {
      // Don't allow hiding required columns
      const column = ALL_COLUMNS.find((c) => c.id === columnId);
      if (column?.required) return;
      next.delete(columnId);
    } else {
      next.add(columnId);
    }
    onVisibleColumnsChange(next);
  };

  const handleToggleGroup = (groupId: string, select: boolean) => {
    const groupColumns = ALL_COLUMNS.filter((c) => c.group === groupId);
    const next = new Set(visibleColumns);

    groupColumns.forEach((column) => {
      if (column.required) return;
      if (select) {
        next.add(column.id);
      } else {
        next.delete(column.id);
      }
    });

    onVisibleColumnsChange(next);
  };

  const isGroupFullySelected = (groupId: string): boolean => {
    const groupColumns = ALL_COLUMNS.filter((c) => c.group === groupId);
    return groupColumns.every((c) => c.required || visibleColumns.has(c.id));
  };

  const isGroupPartiallySelected = (groupId: string): boolean => {
    const groupColumns = ALL_COLUMNS.filter((c) => c.group === groupId);
    return groupColumns.some((c) => visibleColumns.has(c.id)) && !isGroupFullySelected(groupId);
  };

  const handleReset = () => {
    onVisibleColumnsChange(new Set(DEFAULT_VISIBLE_COLUMNS));
  };

  const handleSelectAll = () => {
    onVisibleColumnsChange(new Set(ALL_COLUMNS.map((c) => c.id)));
  };

  const handleSelectNone = () => {
    onVisibleColumnsChange(
      new Set(ALL_COLUMNS.filter((c) => c.required).map((c) => c.id))
    );
  };

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="max-w-2xl max-h-[80vh] overflow-y-auto">
        <DialogHeader>
          <DialogTitle>Выбор колонок</DialogTitle>
          <DialogDescription>
            Выберите колонки для отображения в таблице размещений
          </DialogDescription>
        </DialogHeader>

        <div className="space-y-6 py-4">
          {/* Quick actions */}
          <div className="flex gap-2">
            <Button variant="outline" size="sm" onClick={handleReset}>
              По умолчанию
            </Button>
            <Button variant="outline" size="sm" onClick={handleSelectAll}>
              Выбрать все
            </Button>
            <Button variant="outline" size="sm" onClick={handleSelectNone}>
              Снять выбор
            </Button>
          </div>

          {/* Column groups */}
          {COLUMN_GROUPS.map((group) => {
            const groupColumns = ALL_COLUMNS.filter((c) => c.group === group.id);
            return (
              <div key={group.id} className="space-y-3">
                <div className="flex items-center gap-3">
                  <Checkbox
                    id={`group-${group.id}`}
                    checked={isGroupFullySelected(group.id)}
                    onCheckedChange={(checked) => handleToggleGroup(group.id, !!checked)}
                  />
                  <label
                    htmlFor={`group-${group.id}`}
                    className="text-sm font-medium cursor-pointer"
                  >
                    {group.label}
                  </label>
                  {isGroupPartiallySelected(group.id) && (
                    <span className="text-xs text-muted-foreground">(частично выбрано)</span>
                  )}
                </div>

                <div className="grid grid-cols-2 md:grid-cols-3 gap-2 ml-6">
                  {groupColumns.map((column) => (
                    <div key={column.id} className="flex items-center gap-2">
                      <Checkbox
                        id={`col-${column.id}`}
                        checked={visibleColumns.has(column.id)}
                        onCheckedChange={() => handleToggleColumn(column.id)}
                        disabled={column.required}
                      />
                      <label
                        htmlFor={`col-${column.id}`}
                        className={cn(
                          "text-xs cursor-pointer truncate",
                          column.required && "font-medium"
                        )}
                      >
                        {column.label}
                      </label>
                    </div>
                  ))}
                </div>
              </div>
            );
          })}
        </div>
      </DialogContent>
    </Dialog>
  );
}