import React, { useMemo, useState, useEffect, useCallback } from 'react';
import { useGetEndpointsQuery } from 'librechat-data-provider/react-query';
import { getSettingsKeys, tPresetUpdateSchema } from 'librechat-data-provider';
import type { TPreset } from 'librechat-data-provider';
import { SaveAsPresetDialog } from '~/components/Endpoints';
import { useSetIndexOptions, useLocalize } from '~/hooks';
import { getEndpointField, logger } from '~/utils';
import { componentMapping } from './components';
import { useChatContext } from '~/Providers';
import { settings } from './settings';

const excludedKeys = new Set([
  'conversationId',
  'title',
  'endpoint',
  'endpointType',
  'createdAt',
  'updatedAt',
  'messages',
  'isArchived',
  'tags',
  'user',
  '__v',
  '_id',
  'tools',
  'model',
]);

export default function Parameters() {
  const localize = useLocalize();
  const { conversation, setConversation } = useChatContext();
  const { setOption } = useSetIndexOptions();

  const [isDialogOpen, setIsDialogOpen] = useState(false);
  const [preset, setPreset] = useState<TPreset | null>(null);

  const { data: endpointsConfig } = useGetEndpointsQuery();

  const bedrockRegions = useMemo(() => {
    return endpointsConfig?.[conversation?.endpoint ?? '']?.availableRegions ?? [];
  }, [endpointsConfig, conversation?.endpoint]);

  const endpointType = useMemo(
    () => getEndpointField(endpointsConfig, conversation?.endpoint, 'type'),
    [conversation?.endpoint, endpointsConfig],
  );

  const parameters = useMemo(() => {
    const [combinedKey, endpointKey] = getSettingsKeys(
      endpointType ?? conversation?.endpoint ?? '',
      conversation?.model ?? '',
    );
    return settings[combinedKey] ?? settings[endpointKey];
  }, [conversation, endpointType]);

  useEffect(() => {
    if (!parameters) {
      return;
    }

    // const defaultValueMap = new Map();
    // const paramKeys = new Set(
    //   parameters.map((setting) => {
    //     if (setting.default != null) {
    //       defaultValueMap.set(setting.key, setting.default);
    //     }
    //     return setting.key;
    //   }),
    // );
    const paramKeys = new Set(parameters.map((setting) => setting.key));
    setConversation((prev) => {
      if (!prev) {
        return prev;
      }

      const updatedConversation = { ...prev };

      const conversationKeys = Object.keys(updatedConversation);
      const updatedKeys: string[] = [];
      conversationKeys.forEach((key) => {
        // const defaultValue = defaultValueMap.get(key);
        // if (paramKeys.has(key) && defaultValue != null && prev[key] != null) {
        //   updatedKeys.push(key);
        //   updatedConversation[key] = defaultValue;
        //   return;
        // }

        if (paramKeys.has(key)) {
          return;
        }

        if (excludedKeys.has(key)) {
          return;
        }

        if (prev[key] != null) {
          updatedKeys.push(key);
          delete updatedConversation[key];
        }
      });

      logger.log('parameters', 'parameters effect, updated keys:', updatedKeys);

      return updatedConversation;
    });
  }, [parameters, setConversation]);

  const openDialog = useCallback(() => {
    const newPreset = tPresetUpdateSchema.parse({
      ...conversation,
    }) as TPreset;
    setPreset(newPreset);
    setIsDialogOpen(true);
  }, [conversation]);

  if (!parameters) {
    return null;
  }

  return (
    <div className="h-auto max-w-full overflow-x-hidden p-3">
      <div className="grid grid-cols-4 gap-6">
        {' '}
        {/* This is the parent element containing all settings */}
        {/* Below is an example of an applied dynamic setting, each be contained by a div with the column span specified */}
        {parameters.map((setting) => {
          const Component = componentMapping[setting.component];
          if (!Component) {
            return null;
          }
          const { key, default: defaultValue, ...rest } = setting;

          if (key === 'region' && bedrockRegions.length) {
            rest.options = bedrockRegions;
          }

          return (
            <Component
              key={key}
              settingKey={key}
              defaultValue={defaultValue}
              {...rest}
              setOption={setOption}
              conversation={conversation}
            />
          );
        })}
      </div>
      <div className="mt-6 flex justify-center">
        <button
          onClick={openDialog}
          className="btn btn-primary focus:shadow-outline flex w-full items-center justify-center px-4 py-2 font-semibold text-white hover:bg-green-600 focus:border-green-500"
          type="button"
        >
          {localize('com_endpoint_save_as_preset')}
        </button>
      </div>
      {preset && (
        <SaveAsPresetDialog open={isDialogOpen} onOpenChange={setIsDialogOpen} preset={preset} />
      )}
    </div>
  );
}