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import {
  Autocomplete,
  AutocompleteItem,
  AutocompleteSection,
} from "@nextui-org/react";
import React from "react";
import { useTranslation } from "react-i18next";
import { I18nKey } from "#/i18n/declaration";
import { mapProvider } from "#/utils/map-provider";
import { VERIFIED_MODELS, VERIFIED_PROVIDERS } from "#/utils/verified-models";
import { extractModelAndProvider } from "#/utils/extract-model-and-provider";

interface ModelSelectorProps {
  isDisabled?: boolean;
  models: Record<string, { separator: string; models: string[] }>;
  currentModel?: string;
}

export function ModelSelector({

  isDisabled,

  models,

  currentModel,

}: ModelSelectorProps) {
  const [, setLitellmId] = React.useState<string | null>(null);
  const [selectedProvider, setSelectedProvider] = React.useState<string | null>(
    null,
  );
  const [selectedModel, setSelectedModel] = React.useState<string | null>(null);

  React.useEffect(() => {
    if (currentModel) {
      // runs when resetting to defaults
      const { provider, model } = extractModelAndProvider(currentModel);

      setLitellmId(currentModel);
      setSelectedProvider(provider);
      setSelectedModel(model);
    }
  }, [currentModel]);

  const handleChangeProvider = (provider: string) => {
    setSelectedProvider(provider);
    setSelectedModel(null);

    const separator = models[provider]?.separator || "";
    setLitellmId(provider + separator);
  };

  const handleChangeModel = (model: string) => {
    const separator = models[selectedProvider || ""]?.separator || "";
    let fullModel = selectedProvider + separator + model;
    if (selectedProvider === "openai") {
      // LiteLLM lists OpenAI models without the openai/ prefix
      fullModel = model;
    }
    setLitellmId(fullModel);
    setSelectedModel(model);
  };

  const clear = () => {
    setSelectedProvider(null);
    setLitellmId(null);
  };

  const { t } = useTranslation();

  return (
    <div data-testid="model-selector" className="flex flex-col gap-2">

      <div className="flex flex-row gap-3">

        <fieldset className="flex flex-col gap-2">

          <label htmlFor="agent" className="font-[500] text-[#A3A3A3] text-xs">

            {t(I18nKey.LLM$PROVIDER)}

          </label>

          <Autocomplete

            data-testid="llm-provider"

            isRequired

            isVirtualized={false}

            name="llm-provider"

            isDisabled={isDisabled}

            aria-label={t(I18nKey.LLM$PROVIDER)}

            placeholder={t(I18nKey.LLM$SELECT_PROVIDER_PLACEHOLDER)}

            isClearable={false}

            onSelectionChange={(e) => {

              if (e?.toString()) handleChangeProvider(e.toString());

            }}

            onInputChange={(value) => !value && clear()}

            defaultSelectedKey={selectedProvider ?? undefined}

            selectedKey={selectedProvider}

            inputProps={{

              classNames: {

                inputWrapper: "bg-[#27272A] rounded-md text-sm px-3 py-[10px]",

              },

            }}

          >

            <AutocompleteSection title="Verified">

              {Object.keys(models)

                .filter((provider) => VERIFIED_PROVIDERS.includes(provider))

                .map((provider) => (

                  <AutocompleteItem

                    data-testid={`provider-item-${provider}`}

                    key={provider}

                    value={provider}

                  >

                    {mapProvider(provider)}

                  </AutocompleteItem>

                ))}

            </AutocompleteSection>

            <AutocompleteSection title="Others">

              {Object.keys(models)

                .filter((provider) => !VERIFIED_PROVIDERS.includes(provider))

                .map((provider) => (

                  <AutocompleteItem key={provider} value={provider}>

                    {mapProvider(provider)}

                  </AutocompleteItem>

                ))}

            </AutocompleteSection>

          </Autocomplete>

        </fieldset>



        <fieldset className="flex flex-col gap-2">

          <label htmlFor="agent" className="font-[500] text-[#A3A3A3] text-xs">

            {t(I18nKey.LLM$MODEL)}

          </label>

          <Autocomplete

            data-testid="llm-model"

            isRequired

            isVirtualized={false}

            name="llm-model"

            aria-label={t(I18nKey.LLM$MODEL)}

            placeholder={t(I18nKey.LLM$SELECT_MODEL_PLACEHOLDER)}

            isClearable={false}

            onSelectionChange={(e) => {

              if (e?.toString()) handleChangeModel(e.toString());

            }}

            isDisabled={isDisabled || !selectedProvider}

            selectedKey={selectedModel}

            defaultSelectedKey={selectedModel ?? undefined}

            inputProps={{

              classNames: {

                inputWrapper: "bg-[#27272A] rounded-md text-sm px-3 py-[10px]",

              },

            }}

          >

            <AutocompleteSection title="Verified">

              {models[selectedProvider || ""]?.models

                .filter((model) => VERIFIED_MODELS.includes(model))

                .map((model) => (

                  <AutocompleteItem key={model} value={model}>

                    {model}

                  </AutocompleteItem>

                ))}

            </AutocompleteSection>

            <AutocompleteSection title="Others">

              {models[selectedProvider || ""]?.models

                .filter((model) => !VERIFIED_MODELS.includes(model))

                .map((model) => (

                  <AutocompleteItem

                    data-testid={`model-item-${model}`}

                    key={model}

                    value={model}

                  >

                    {model}

                  </AutocompleteItem>

                ))}

            </AutocompleteSection>

          </Autocomplete>

        </fieldset>

      </div>

    </div>
  );
}