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import { Dialog, Transition } from '@headlessui/react';
import { CloudUpload, RefreshCcw, RefreshCw } from 'lucide-react';
import React, { Fragment, useEffect, useState } from 'react';

interface SettingsType {
  chatModelProviders: {
    [key: string]: string[];
  };
  embeddingModelProviders: {
    [key: string]: string[];
  };
  openaiApiKey: string;
  groqApiKey: string;
  ollamaApiUrl: string;
}

const SettingsDialog = ({

  isOpen,

  setIsOpen,

}: {

  isOpen: boolean;

  setIsOpen: (isOpen: boolean) => void;

}) => {
  const [config, setConfig] = useState<SettingsType | null>(null);
  const [selectedChatModelProvider, setSelectedChatModelProvider] = useState<
    string | null
  >(null);
  const [selectedChatModel, setSelectedChatModel] = useState<string | null>(
    null,
  );
  const [selectedEmbeddingModelProvider, setSelectedEmbeddingModelProvider] =
    useState<string | null>(null);
  const [selectedEmbeddingModel, setSelectedEmbeddingModel] = useState<
    string | null
  >(null);
  const [customOpenAIApiKey, setCustomOpenAIApiKey] = useState<string | null>(
    null,
  );
  const [customOpenAIBaseURL, setCustomOpenAIBaseURL] = useState<string | null>(
    null,
  );
  const [isLoading, setIsLoading] = useState(false);
  const [isUpdating, setIsUpdating] = useState(false);

  useEffect(() => {
    if (isOpen) {
      const fetchConfig = async () => {
        setIsLoading(true);
        const res = await fetch(`${process.env.NEXT_PUBLIC_API_URL}/config`, {
          headers: {
            'Content-Type': 'application/json',
          },
        });
        const data = await res.json();
        setConfig(data);
        setIsLoading(false);
      };

      fetchConfig();
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [isOpen]);

  useEffect(() => {
    setSelectedChatModelProvider(localStorage.getItem('chatModelProvider'));
    setSelectedChatModel(localStorage.getItem('chatModel'));
    setSelectedEmbeddingModelProvider(
      localStorage.getItem('embeddingModelProvider'),
    );
    setSelectedEmbeddingModel(localStorage.getItem('embeddingModel'));
    setCustomOpenAIApiKey(localStorage.getItem('openAIApiKey'));
    setCustomOpenAIBaseURL(localStorage.getItem('openAIBaseUrl'));
  }, []);

  const handleSubmit = async () => {
    setIsUpdating(true);

    try {
      await fetch(`${process.env.NEXT_PUBLIC_API_URL}/config`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify(config),
      });

      localStorage.setItem('chatModelProvider', selectedChatModelProvider!);
      localStorage.setItem('chatModel', selectedChatModel!);
      localStorage.setItem(
        'embeddingModelProvider',
        selectedEmbeddingModelProvider!,
      );
      localStorage.setItem('embeddingModel', selectedEmbeddingModel!);
      localStorage.setItem('openAIApiKey', customOpenAIApiKey!);
      localStorage.setItem('openAIBaseURL', customOpenAIBaseURL!);
    } catch (err) {
      console.log(err);
    } finally {
      setIsUpdating(false);
      setIsOpen(false);

      window.location.reload();
    }
  };

  return (
    <Transition appear show={isOpen} as={Fragment}>

      <Dialog

        as="div"

        className="relative z-50"

        onClose={() => setIsOpen(false)}

      >

        <Transition.Child

          as={Fragment}

          enter="ease-out duration-300"

          enterFrom="opacity-0"

          enterTo="opacity-100"

          leave="ease-in duration-200"

          leaveFrom="opacity-100"

          leaveTo="opacity-0"

        >

          <div className="fixed inset-0 bg-black/50" />

        </Transition.Child>

        <div className="fixed inset-0 overflow-y-auto">

          <div className="flex min-h-full items-center justify-center p-4 text-center">

            <Transition.Child

              as={Fragment}

              enter="ease-out duration-200"

              enterFrom="opacity-0 scale-95"

              enterTo="opacity-100 scale-100"

              leave="ease-in duration-100"

              leaveFrom="opacity-100 scale-200"

              leaveTo="opacity-0 scale-95"

            >

              <Dialog.Panel className="w-full max-w-md transform rounded-2xl bg-[#111111] border border-[#1c1c1c] p-6 text-left align-middle shadow-xl transition-all">

                <Dialog.Title className="text-xl font-medium leading-6 text-white">

                  Settings

                </Dialog.Title>

                {config && !isLoading && (

                  <div className="flex flex-col space-y-4 mt-6">

                    {config.chatModelProviders && (

                      <div className="flex flex-col space-y-1">

                        <p className="text-white/70 text-sm">

                          Chat model Provider

                        </p>

                        <select

                          onChange={(e) => {

                            setSelectedChatModelProvider(e.target.value);

                            setSelectedChatModel(

                              config.chatModelProviders[e.target.value][0],

                            );

                          }}

                          className="bg-[#111111] px-3 py-2 flex items-center overflow-hidden border border-[#1C1C1C] text-white rounded-lg text-sm"

                        >

                          {Object.keys(config.chatModelProviders).map(

                            (provider) => (

                              <option

                                key={provider}

                                value={provider}

                                selected={

                                  provider === selectedChatModelProvider

                                }

                              >

                                {provider.charAt(0).toUpperCase() +

                                  provider.slice(1)}

                              </option>

                            ),

                          )}

                        </select>

                      </div>

                    )}

                    {selectedChatModelProvider &&

                      selectedChatModelProvider != 'custom_openai' && (

                        <div className="flex flex-col space-y-1">

                          <p className="text-white/70 text-sm">Chat Model</p>

                          <select

                            onChange={(e) =>

                              setSelectedChatModel(e.target.value)

                            }

                            className="bg-[#111111] px-3 py-2 flex items-center overflow-hidden border border-[#1C1C1C] text-white rounded-lg text-sm"

                          >

                            {config.chatModelProviders[

                              selectedChatModelProvider

                            ] ? (

                              config.chatModelProviders[

                                selectedChatModelProvider

                              ].length > 0 ? (

                                config.chatModelProviders[

                                  selectedChatModelProvider

                                ].map((model) => (

                                  <option

                                    key={model}

                                    value={model}

                                    selected={model === selectedChatModel}

                                  >

                                    {model}

                                  </option>

                                ))

                              ) : (

                                <option value="" disabled selected>

                                  No models available

                                </option>

                              )

                            ) : (

                              <option value="" disabled selected>

                                Invalid provider, please check backend logs

                              </option>

                            )}

                          </select>

                        </div>

                      )}

                    {selectedChatModelProvider &&

                      selectedChatModelProvider === 'custom_openai' && (

                        <>

                          <div className="flex flex-col space-y-1">

                            <p className="text-white/70 text-sm">Model name</p>

                            <input

                              type="text"

                              placeholder="Model name"

                              defaultValue={selectedChatModel!}

                              onChange={(e) =>

                                setSelectedChatModel(e.target.value)

                              }

                              className="bg-[#111111] px-3 py-2 flex items-center overflow-hidden border border-[#1C1C1C] text-white rounded-lg text-sm"

                            />

                          </div>

                          <div className="flex flex-col space-y-1">

                            <p className="text-white/70 text-sm">

                              Custom OpenAI API Key (optional)

                            </p>

                            <input

                              type="text"

                              placeholder="Custom OpenAI API Key"

                              defaultValue={customOpenAIApiKey!}

                              onChange={(e) =>

                                setCustomOpenAIApiKey(e.target.value)

                              }

                              className="bg-[#111111] px-3 py-2 flex items-center overflow-hidden border border-[#1C1C1C] text-white rounded-lg text-sm"

                            />

                          </div>

                          <div className="flex flex-col space-y-1">

                            <p className="text-white/70 text-sm">

                              Custom OpenAI Base URL

                            </p>

                            <input

                              type="text"

                              placeholder="Custom OpenAI Base URL"

                              defaultValue={customOpenAIBaseURL!}

                              onChange={(e) =>

                                setCustomOpenAIBaseURL(e.target.value)

                              }

                              className="bg-[#111111] px-3 py-2 flex items-center overflow-hidden border border-[#1C1C1C] text-white rounded-lg text-sm"

                            />

                          </div>

                        </>

                      )}

                    {/* Embedding models */}

                    {config.embeddingModelProviders && (

                      <div className="flex flex-col space-y-1">

                        <p className="text-white/70 text-sm">

                          Embedding model Provider

                        </p>

                        <select

                          onChange={(e) => {

                            setSelectedEmbeddingModelProvider(e.target.value);

                            setSelectedEmbeddingModel(

                              config.embeddingModelProviders[e.target.value][0],

                            );

                          }}

                          className="bg-[#111111] px-3 py-2 flex items-center overflow-hidden border border-[#1C1C1C] text-white rounded-lg text-sm"

                        >

                          {Object.keys(config.embeddingModelProviders).map(

                            (provider) => (

                              <option

                                key={provider}

                                value={provider}

                                selected={

                                  provider === selectedEmbeddingModelProvider

                                }

                              >

                                {provider.charAt(0).toUpperCase() +

                                  provider.slice(1)}

                              </option>

                            ),

                          )}

                        </select>

                      </div>

                    )}

                    {selectedEmbeddingModelProvider && (

                      <div className="flex flex-col space-y-1">

                        <p className="text-white/70 text-sm">Embedding Model</p>

                        <select

                          onChange={(e) =>

                            setSelectedEmbeddingModel(e.target.value)

                          }

                          className="bg-[#111111] px-3 py-2 flex items-center overflow-hidden border border-[#1C1C1C] text-white rounded-lg text-sm"

                        >

                          {config.embeddingModelProviders[

                            selectedEmbeddingModelProvider

                          ] ? (

                            config.embeddingModelProviders[

                              selectedEmbeddingModelProvider

                            ].length > 0 ? (

                              config.embeddingModelProviders[

                                selectedEmbeddingModelProvider

                              ].map((model) => (

                                <option

                                  key={model}

                                  value={model}

                                  selected={model === selectedEmbeddingModel}

                                >

                                  {model}

                                </option>

                              ))

                            ) : (

                              <option value="" disabled selected>

                                No embedding models available

                              </option>

                            )

                          ) : (

                            <option value="" disabled selected>

                              Invalid provider, please check backend logs

                            </option>

                          )}

                        </select>

                      </div>

                    )}

                    <div className="flex flex-col space-y-1">

                      <p className="text-white/70 text-sm">OpenAI API Key</p>

                      <input

                        type="text"

                        placeholder="OpenAI API Key"

                        defaultValue={config.openaiApiKey}

                        onChange={(e) =>

                          setConfig({

                            ...config,

                            openaiApiKey: e.target.value,

                          })

                        }

                        className="bg-[#111111] px-3 py-2 flex items-center overflow-hidden border border-[#1C1C1C] text-white rounded-lg text-sm"

                      />

                    </div>

                    <div className="flex flex-col space-y-1">

                      <p className="text-white/70 text-sm">Ollama API URL</p>

                      <input

                        type="text"

                        placeholder="Ollama API URL"

                        defaultValue={config.ollamaApiUrl}

                        onChange={(e) =>

                          setConfig({

                            ...config,

                            ollamaApiUrl: e.target.value,

                          })

                        }

                        className="bg-[#111111] px-3 py-2 flex items-center overflow-hidden border border-[#1C1C1C] text-white rounded-lg text-sm"

                      />

                    </div>

                    <div className="flex flex-col space-y-1">

                      <p className="text-white/70 text-sm">GROQ API Key</p>

                      <input

                        type="text"

                        placeholder="GROQ API Key"

                        defaultValue={config.groqApiKey}

                        onChange={(e) =>

                          setConfig({

                            ...config,

                            groqApiKey: e.target.value,

                          })

                        }

                        className="bg-[#111111] px-3 py-2 flex items-center overflow-hidden border border-[#1C1C1C] text-white rounded-lg text-sm"

                      />

                    </div>

                  </div>

                )}

                {isLoading && (

                  <div className="w-full flex items-center justify-center mt-6 text-white/70 py-6">

                    <RefreshCcw className="animate-spin" />

                  </div>

                )}

                <div className="w-full mt-6 space-y-2">

                  <p className="text-xs text-white/50">

                    We&apos;ll refresh the page after updating the settings.

                  </p>

                  <button

                    onClick={handleSubmit}

                    className="bg-[#24A0ED] flex flex-row items-center space-x-2 text-white disabled:text-white/50 hover:bg-opacity-85 transition duration-100 disabled:bg-[#ececec21] rounded-full px-4 py-2"

                    disabled={isLoading || isUpdating}

                  >

                    {isUpdating ? (

                      <RefreshCw size={20} className="animate-spin" />

                    ) : (

                      <CloudUpload size={20} />

                    )}

                  </button>

                </div>

              </Dialog.Panel>

            </Transition.Child>

          </div>

        </div>

      </Dialog>
    </Transition>
  );
};

export default SettingsDialog;