import { base64ToString } from 'lib/base64'
import { CREATE_FILE_URL_PARAM, DEFAULT_FILE_NAME } from 'lib/constants'
import { useEffect } from 'react'
import { useLocation } from 'react-router-dom'
import { useCommandsContext } from './useCommandsContext'
import { useSettingsAuthContext } from './useSettingsAuthContext'
import { isDesktop } from 'lib/isDesktop'
import { FileLinkParams } from 'lib/createFileLink'
import { ProjectsCommandSchema } from 'lib/commandBarConfigs/projectsCommandConfig'
import { baseUnitsUnion } from 'lib/settings/settingsTypes'

/**
 * companion to createFileLink. This hook runs an effect on mount that
 * checks the URL for the CREATE_FILE_URL_PARAM and triggers the "Create file"
 * command if it is present, loading the command's default values from the other
 * URL parameters.
 */
export function useCreateFileLinkQuery() {
  const location = useLocation()
  const { commandBarSend } = useCommandsContext()
  const { settings } = useSettingsAuthContext()

  useEffect(() => {
    const urlParams = new URLSearchParams(location.search)
    const createFileParam = urlParams.has(CREATE_FILE_URL_PARAM)

    console.log('checking for createFileParam', {
      createFileParam,
      urlParams: [...urlParams.entries()],
      location,
    })

    if (createFileParam) {
      const params: FileLinkParams = {
        code: base64ToString(decodeURIComponent(urlParams.get('code') ?? '')),

        name: urlParams.get('name') ?? DEFAULT_FILE_NAME,

        units:
          (baseUnitsUnion.find((unit) => urlParams.get('units') === unit) ||
            settings.context.modeling.defaultUnit.default) ??
          settings.context.modeling.defaultUnit.current,
      }
      console.log('createFileParam', params)

      // For initializing the command arguments, we actually want `method` to be undefined
      // so that we don't skip it in the command palette.
      type CreateFileSchemaMethodOptional = Omit<
        ProjectsCommandSchema['Import file from URL'],
        'method'
      > & {
        method?: 'newProject' | 'existingProject'
      }

      const argDefaultValues: CreateFileSchemaMethodOptional = {
        name: params.name
          ? isDesktop()
            ? params.name.replace('.kcl', '')
            : params.name
          : isDesktop()
          ? settings.context.projects.defaultProjectName.current
          : DEFAULT_FILE_NAME,
        code: params.code || '',
        units: params.units,
        method: isDesktop() ? undefined : 'existingProject',
      }

      commandBarSend({
        type: 'Find and select command',
        data: {
          groupId: 'projects',
          name: 'Import file from URL',
          argDefaultValues,
        },
      })
    }
  }, [location.search])
}