components/model-picker.tsx

"use client";
import { MODELS, DEFAULT_MODEL, ModelID } from "@/lib/models";
import {
  Select,
  SelectContent,
  SelectGroup,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "./ui/select";
import { cn } from "@/lib/utils";
import { Bot } from "lucide-react";
import { useEffect } from "react";

interface ModelPickerProps {
  selectedModel: ModelID;
  setSelectedModel: (model: ModelID) => void;
}

export const ModelPicker = ({ selectedModel, setSelectedModel }: ModelPickerProps) => {
  // Ensure we always have a valid model ID
  const validModelId = MODELS.includes(selectedModel) ? selectedModel : DEFAULT_MODEL;
  
  // If the selected model is invalid, update it to the default
  useEffect(() => {
    if (selectedModel !== validModelId) {
      setSelectedModel(validModelId);
    }
  }, [selectedModel, validModelId, setSelectedModel]);

  // Handle model change
  const handleModelChange = (modelId: string) => {
    if (MODELS.includes(modelId as ModelID)) {
      setSelectedModel(modelId as ModelID);
    }
  };

  return (
    <div className="absolute bottom-2 left-2 z-10">
      <Select
        value={validModelId}
        onValueChange={handleModelChange}
        defaultValue={validModelId}
      >
        <SelectTrigger
          className="max-w-[200px] sm:max-w-fit sm:w-56 px-2 sm:px-3 h-8 sm:h-9 rounded-full group border-primary/20 bg-primary/5 hover:bg-primary/10 dark:bg-primary/10 dark:hover:bg-primary/20 transition-all duration-200 ring-offset-background focus:ring-2 focus:ring-primary/30 focus:ring-offset-2"
        >
          <SelectValue
            placeholder="Select model"
            className="text-xs font-medium flex items-center gap-1 sm:gap-2 text-primary dark:text-primary-foreground"
          >
            <div className="flex items-center gap-1 sm:gap-2">
              <Bot className="h-3 w-3" />
              <span className="font-medium truncate">{validModelId}</span>
            </div>
          </SelectValue>
        </SelectTrigger>
        <SelectContent
          align="start"
          className="bg-background/95 dark:bg-muted/95 backdrop-blur-sm border-border/80 rounded-lg overflow-hidden p-0 w-[280px]"
        >
          <SelectGroup className="space-y-1 p-1">
            {MODELS.map((id) => (
              <SelectItem
                key={id}
                value={id}
                className={cn(
                  "!px-2 sm:!px-3 py-1.5 sm:py-2 cursor-pointer rounded-md text-xs transition-colors duration-150",
                  "hover:bg-primary/5 hover:text-primary-foreground",
                  "focus:bg-primary/10 focus:text-primary focus:outline-none",
                  "data-[highlighted]:bg-primary/10 data-[highlighted]:text-primary",
                  validModelId === id && "!bg-primary/15 !text-primary font-medium"
                )}
              >
                <div className="flex items-center gap-1.5">
                  <Bot className="h-4 w-4" />
                  <span className="font-medium truncate">{id}</span>
                </div>
              </SelectItem>
            ))}
          </SelectGroup>
        </SelectContent>
      </Select>
    </div>
  );
};