/* eslint-disable unicorn/no-nested-ternary */
import { cn } from "@/lib/utils";
import { Dialog, Transition } from "@headlessui/react";
import { CloudUpload, RefreshCcw, RefreshCw } from "lucide-react";
import React, { Fragment, useEffect, useState, type SelectHTMLAttributes } from "react";
import ThemeSwitcher from "./theme/Switcher";

interface InputProperties extends React.InputHTMLAttributes<HTMLInputElement> {}

const Input = ({ className, ...restProperties }: InputProperties) => {
  return (
    <input
      {...restProperties}
      className={cn(
        "bg-light-secondary dark:bg-dark-secondary px-3 py-2 flex items-center overflow-hidden border border-light-200 dark:border-dark-200 dark:text-white rounded-lg text-sm",
        className,
      )}
    />
  );
};

interface SelectProperties extends SelectHTMLAttributes<HTMLSelectElement> {
  options: { value: string; label: string; disabled?: boolean }[];
}

export const Select = ({ className, options, ...restProperties }: SelectProperties) => {
  return (
    <select
      {...restProperties}
      className={cn(
        "bg-light-secondary dark:bg-dark-secondary px-3 py-2 flex items-center overflow-hidden border border-light-200 dark:border-dark-200 dark:text-white rounded-lg text-sm",
        className,
      )}
    >
      {options.map(({ label, value, disabled }) => {
        return (
          <option key={value} value={value} disabled={disabled}>
            {label}
          </option>
        );
      })}
    </select>
  );
};

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>("");
  const [customOpenAIBaseURL, setCustomOpenAIBaseURL] = useState<string>("");
  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()) as SettingsType;
        setConfig(data);

        const chatModelProvidersKeys = Object.keys(data.chatModelProviders || {});
        const embeddingModelProvidersKeys = Object.keys(data.embeddingModelProviders || {});

        const defaultChatModelProvider = chatModelProvidersKeys.length > 0 ? chatModelProvidersKeys[0] : "";
        const defaultEmbeddingModelProvider =
          embeddingModelProvidersKeys.length > 0 ? embeddingModelProvidersKeys[0] : "";

        const chatModelProvider = localStorage.getItem("chatModelProvider") || defaultChatModelProvider || "";
        const chatModel =
          localStorage.getItem("chatModel") ||
          (data.chatModelProviders && data.chatModelProviders[chatModelProvider]?.[0]) ||
          "";
        const embeddingModelProvider =
          localStorage.getItem("embeddingModelProvider") || defaultEmbeddingModelProvider || "";
        const embeddingModel =
          localStorage.getItem("embeddingModel") ||
          (data.embeddingModelProviders && data.embeddingModelProviders[embeddingModelProvider]?.[0]) ||
          "";

        setSelectedChatModelProvider(chatModelProvider);
        setSelectedChatModel(chatModel);
        setSelectedEmbeddingModelProvider(embeddingModelProvider);
        setSelectedEmbeddingModel(embeddingModel);
        setCustomOpenAIApiKey(localStorage.getItem("openAIApiKey") || "");
        setCustomOpenAIBaseURL(localStorage.getItem("openAIBaseURL") || "");
        setIsLoading(false);
      };

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

  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 (error) {
      console.log(error);
    } 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-white/50 dark: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-light-secondary dark:bg-dark-secondary border border-light-200 dark:border-dark-200 p-6 text-left align-middle shadow-xl transition-all">
                <Dialog.Title className="text-xl font-medium leading-6 dark:text-white">Settings</Dialog.Title>
                {config && !isLoading && (
                  <div className="flex flex-col space-y-4 mt-6">
                    <div className="flex flex-col space-y-1">
                      <p className="text-black/70 dark:text-white/70 text-sm">Theme</p>
                      <ThemeSwitcher />
                    </div>
                    {config.chatModelProviders && (
                      <div className="flex flex-col space-y-1">
                        <p className="text-black/70 dark:text-white/70 text-sm">Chat model Provider</p>
                        <Select
                          value={selectedChatModelProvider ?? undefined}
                          onChange={e => {
                            setSelectedChatModelProvider(e.target.value);
                            setSelectedChatModel(config.chatModelProviders[e.target.value][0]);
                          }}
                          options={Object.keys(config.chatModelProviders).map(provider => ({
                            value: provider,
                            label: provider.charAt(0).toUpperCase() + provider.slice(1),
                          }))}
                        />
                      </div>
                    )}
                    {selectedChatModelProvider && selectedChatModelProvider != "custom_openai" && (
                      <div className="flex flex-col space-y-1">
                        <p className="text-black/70 dark:text-white/70 text-sm">Chat Model</p>
                        <Select
                          value={selectedChatModel ?? undefined}
                          onChange={e => setSelectedChatModel(e.target.value)}
                          options={(() => {
                            const chatModelProvider = config.chatModelProviders[selectedChatModelProvider];

                            return chatModelProvider
                              ? chatModelProvider.length > 0
                                ? chatModelProvider.map(model => ({
                                    value: model,
                                    label: model,
                                  }))
                                : [
                                    {
                                      value: "",
                                      label: "No models available",
                                      disabled: true,
                                    },
                                  ]
                              : [
                                  {
                                    value: "",
                                    label: "Invalid provider, please check backend logs",
                                    disabled: true,
                                  },
                                ];
                          })()}
                        />
                      </div>
                    )}
                    {selectedChatModelProvider && selectedChatModelProvider === "custom_openai" && (
                      <>
                        <div className="flex flex-col space-y-1">
                          <p className="text-black/70 dark:text-white/70 text-sm">Model name</p>
                          <Input
                            type="text"
                            placeholder="Model name"
                            defaultValue={selectedChatModel!}
                            onChange={e => setSelectedChatModel(e.target.value)}
                          />
                        </div>
                        <div className="flex flex-col space-y-1">
                          <p className="text-black/70 dark:text-white/70 text-sm">Custom OpenAI API Key</p>
                          <Input
                            type="text"
                            placeholder="Custom OpenAI API Key"
                            defaultValue={customOpenAIApiKey!}
                            onChange={e => setCustomOpenAIApiKey(e.target.value)}
                          />
                        </div>
                        <div className="flex flex-col space-y-1">
                          <p className="text-black/70 dark: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)}
                          />
                        </div>
                      </>
                    )}
                    {/* Embedding models */}
                    {config.embeddingModelProviders && (
                      <div className="flex flex-col space-y-1">
                        <p className="text-black/70 dark:text-white/70 text-sm">Embedding model Provider</p>
                        <Select
                          value={selectedEmbeddingModelProvider ?? undefined}
                          onChange={e => {
                            setSelectedEmbeddingModelProvider(e.target.value);
                            setSelectedEmbeddingModel(config.embeddingModelProviders[e.target.value][0]);
                          }}
                          options={Object.keys(config.embeddingModelProviders).map(provider => ({
                            label: provider.charAt(0).toUpperCase() + provider.slice(1),
                            value: provider,
                          }))}
                        />
                      </div>
                    )}
                    {selectedEmbeddingModelProvider && (
                      <div className="flex flex-col space-y-1">
                        <p className="text-black/70 dark:text-white/70 text-sm">Embedding Model</p>
                        <Select
                          value={selectedEmbeddingModel ?? undefined}
                          onChange={e => setSelectedEmbeddingModel(e.target.value)}
                          options={(() => {
                            const embeddingModelProvider =
                              config.embeddingModelProviders[selectedEmbeddingModelProvider];

                            return embeddingModelProvider
                              ? embeddingModelProvider.length > 0
                                ? embeddingModelProvider.map(model => ({
                                    label: model,
                                    value: model,
                                  }))
                                : [
                                    {
                                      label: "No embedding models available",
                                      value: "",
                                      disabled: true,
                                    },
                                  ]
                              : [
                                  {
                                    label: "Invalid provider, please check backend logs",
                                    value: "",
                                    disabled: true,
                                  },
                                ];
                          })()}
                        />
                      </div>
                    )}
                    <div className="flex flex-col space-y-1">
                      <p className="text-black/70 dark: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,
                          })
                        }
                      />
                    </div>
                    <div className="flex flex-col space-y-1">
                      <p className="text-black/70 dark: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,
                          })
                        }
                      />
                    </div>
                    <div className="flex flex-col space-y-1">
                      <p className="text-black/70 dark: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,
                          })
                        }
                      />
                    </div>
                  </div>
                )}
                {isLoading && (
                  <div className="w-full flex items-center justify-center mt-6 text-black/70 dark:text-white/70 py-6">
                    <RefreshCcw className="animate-spin" />
                  </div>
                )}
                <div className="w-full mt-6 space-y-2">
                  <p className="text-xs text-black/50 dark: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;