import type { FC } from 'react'
import type {
  Credential,
  CustomConfigurationModelFixedFields,
  CustomModel,
  ModelProvider,
} from '../declarations'
import type {
  FormRefObject,
  FormSchema,
} from '@/app/components/base/form/types'
import {
  AlertDialog,
  AlertDialogActions,
  AlertDialogCancelButton,
  AlertDialogConfirmButton,
  AlertDialogContent,
  AlertDialogTitle,
} from '@langgenius/dify-ui/alert-dialog'
import { Button } from '@langgenius/dify-ui/button'
import {
  Dialog,
  DialogCloseButton,
  DialogContent,
} from '@langgenius/dify-ui/dialog'
import {
  memo,
  useCallback,
  useMemo,
  useRef,
  useState,
} from 'react'
import { useTranslation } from 'react-i18next'
import Badge from '@/app/components/base/badge'
import AuthForm from '@/app/components/base/form/form-scenarios/auth'
import { LinkExternal02 } from '@/app/components/base/icons/src/vender/line/general'
import { Lock01 } from '@/app/components/base/icons/src/vender/solid/security'
import Loading from '@/app/components/base/loading'
import {
  useAuth,
  useCredentialData,
} from '@/app/components/header/account-setting/model-provider-page/model-auth/hooks'
import ModelIcon from '@/app/components/header/account-setting/model-provider-page/model-icon'
import { useAppContext } from '@/context/app-context'
import { useRenderI18nObject } from '@/hooks/use-i18n'
import {
  ConfigurationMethodEnum,
  FormTypeEnum,
  ModelModalModeEnum,
} from '../declarations'
import {
  useLanguage,
} from '../hooks'
import { CredentialSelector } from '../model-auth'
import { useModelFormSchemas } from '../model-auth/hooks'

type ModelModalProps = {
  provider: ModelProvider
  configurateMethod: ConfigurationMethodEnum
  currentCustomConfigurationModelFixedFields?: CustomConfigurationModelFixedFields
  onCancel: () => void
  onSave: (formValues?: Record<string, any>) => void
  onRemove: (formValues?: Record<string, any>) => void
  model?: CustomModel
  credential?: Credential
  isModelCredential?: boolean
  mode?: ModelModalModeEnum
}

const ModelModal: FC<ModelModalProps> = ({
  provider,
  configurateMethod,
  currentCustomConfigurationModelFixedFields,
  onCancel,
  onSave,
  model,
  credential,
  isModelCredential,
  mode = ModelModalModeEnum.configProviderCredential,
}) => {
  const renderI18nObject = useRenderI18nObject()
  const providerFormSchemaPredefined = configurateMethod === ConfigurationMethodEnum.predefinedModel
  const {
    isLoading,
    credentialData,
  } = useCredentialData(provider, providerFormSchemaPredefined, isModelCredential, credential, model)
  const {
    handleSaveCredential,
    handleConfirmDelete,
    deleteCredentialId,
    closeConfirmDelete,
    openConfirmDelete,
    doingAction,
    handleActiveCredential,
  } = useAuth(
    provider,
    configurateMethod,
    currentCustomConfigurationModelFixedFields,
    {
      isModelCredential,
      mode,
    },
  )
  const {
    credentials: formSchemasValue,
    available_credentials,
  } = credentialData as any

  const { isCurrentWorkspaceManager } = useAppContext()
  const { t } = useTranslation()
  const language = useLanguage()
  const {
    formSchemas,
    formValues,
    modelNameAndTypeFormSchemas,
    modelNameAndTypeFormValues,
  } = useModelFormSchemas(provider, providerFormSchemaPredefined, formSchemasValue, credential, model)
  const formRef1 = useRef<FormRefObject>(null)
  const [selectedCredential, setSelectedCredential] = useState<Credential & { addNewCredential?: boolean } | undefined>()
  const formRef2 = useRef<FormRefObject>(null)
  const isEditMode = !!credential && !!Object.keys(formSchemasValue || {}).filter((key) => {
    return key !== '__model_name' && key !== '__model_type' && !!formValues[key]
  }).length && isCurrentWorkspaceManager

  const handleSave = useCallback(async () => {
    if (mode === ModelModalModeEnum.addCustomModelToModelList && selectedCredential && !selectedCredential?.addNewCredential) {
      handleActiveCredential(selectedCredential, model)
      onCancel()
      return
    }

    let modelNameAndTypeIsCheckValidated = true
    let modelNameAndTypeValues: Record<string, any> = {}

    if (mode === ModelModalModeEnum.configCustomModel) {
      const formResult = formRef1.current?.getFormValues({
        needCheckValidatedValues: true,
      }) || { isCheckValidated: false, values: {} }
      modelNameAndTypeIsCheckValidated = formResult.isCheckValidated
      modelNameAndTypeValues = formResult.values
    }

    if (mode === ModelModalModeEnum.configModelCredential && model) {
      modelNameAndTypeValues = {
        __model_name: model.model,
        __model_type: model.model_type,
      }
    }

    if (mode === ModelModalModeEnum.addCustomModelToModelList && selectedCredential?.addNewCredential && model) {
      modelNameAndTypeValues = {
        __model_name: model.model,
        __model_type: model.model_type,
      }
    }
    const {
      isCheckValidated,
      values,
    } = formRef2.current?.getFormValues({
      needCheckValidatedValues: true,
      needTransformWhenSecretFieldIsPristine: true,
    }) || { isCheckValidated: false, values: {} }
    if (!isCheckValidated || !modelNameAndTypeIsCheckValidated)
      return

    const {
      __model_name,
      __model_type,
    } = modelNameAndTypeValues
    const {
      __authorization_name__,
      ...rest
    } = values
    if (__model_name && __model_type) {
      await handleSaveCredential({
        credential_id: credential?.credential_id,
        credentials: rest,
        name: __authorization_name__,
        model: __model_name,
        model_type: __model_type,
      })
    }
    else {
      await handleSaveCredential({
        credential_id: credential?.credential_id,
        credentials: rest,
        name: __authorization_name__,
      })
    }
    onSave(values)
  }, [handleSaveCredential, credential?.credential_id, model, onSave, mode, selectedCredential, handleActiveCredential])

  const modalTitle = useMemo(() => {
    let label = t('modelProvider.auth.apiKeyModal.title', { ns: 'common' })

    if (mode === ModelModalModeEnum.configCustomModel || mode === ModelModalModeEnum.addCustomModelToModelList)
      label = t('modelProvider.auth.addModel', { ns: 'common' })
    if (mode === ModelModalModeEnum.configModelCredential) {
      if (credential)
        label = t('modelProvider.auth.editModelCredential', { ns: 'common' })
      else
        label = t('modelProvider.auth.addModelCredential', { ns: 'common' })
    }

    return (
      <div className="title-2xl-semi-bold text-text-primary">
        {label}
      </div>
    )
  }, [t, mode, credential])

  const modalDesc = useMemo(() => {
    if (providerFormSchemaPredefined) {
      return (
        <div className="mt-1 system-xs-regular text-text-tertiary">
          {t('modelProvider.auth.apiKeyModal.desc', { ns: 'common' })}
        </div>
      )
    }

    return null
  }, [providerFormSchemaPredefined, t])

  const modalModel = useMemo(() => {
    if (mode === ModelModalModeEnum.configCustomModel) {
      return (
        <div className="mt-2 flex items-center">
          <ModelIcon
            className="mr-2 size-4 shrink-0"
            provider={provider}
          />
          <div className="mr-1 system-md-regular text-text-secondary">{renderI18nObject(provider.label)}</div>
        </div>
      )
    }
    if (model && (mode === ModelModalModeEnum.configModelCredential || mode === ModelModalModeEnum.addCustomModelToModelList)) {
      return (
        <div className="mt-2 flex items-center">
          <ModelIcon
            className="mr-2 size-4 shrink-0"
            provider={provider}
            modelName={model.model}
          />
          <div className="mr-1 system-md-regular text-text-secondary">{model.model}</div>
          <Badge>{model.model_type}</Badge>
        </div>
      )
    }

    return null
  }, [model, provider, mode, renderI18nObject])

  const showCredentialLabel = useMemo(() => {
    if (mode === ModelModalModeEnum.configCustomModel)
      return true
    if (mode === ModelModalModeEnum.addCustomModelToModelList)
      return selectedCredential?.addNewCredential
  }, [mode, selectedCredential])
  const showCredentialForm = useMemo(() => {
    if (mode !== ModelModalModeEnum.addCustomModelToModelList)
      return true
    return selectedCredential?.addNewCredential
  }, [mode, selectedCredential])
  const saveButtonText = useMemo(() => {
    if (mode === ModelModalModeEnum.addCustomModelToModelList || mode === ModelModalModeEnum.configCustomModel)
      return t('operation.add', { ns: 'common' })
    return t('operation.save', { ns: 'common' })
  }, [mode, t])

  const handleDeleteCredential = useCallback(() => {
    handleConfirmDelete()
    onCancel()
  }, [handleConfirmDelete])

  const handleModelNameAndTypeChange = useCallback((field: string, value: any) => {
    const {
      getForm,
    } = formRef2.current as FormRefObject || {}
    if (getForm())
      getForm()?.setFieldValue(field, value)
  }, [])
  const notAllowCustomCredential = provider.allow_custom_token === false

  const handleOpenChange = useCallback((open: boolean) => {
    if (!open)
      onCancel()
  }, [onCancel])

  const handleConfirmOpenChange = useCallback((open: boolean) => {
    if (!open)
      closeConfirmDelete()
  }, [closeConfirmDelete])

  return (
    <Dialog open onOpenChange={handleOpenChange}>
      <DialogContent
        backdropProps={{ forceRender: true }}
        className="flex w-[640px] max-w-[640px] flex-col overflow-hidden p-0"
      >
        <DialogCloseButton className="top-5 right-5 size-8" />
        <div className="shrink-0 p-6 pb-3">
          {modalTitle}
          {modalDesc}
          {modalModel}
        </div>
        <div className="min-h-0 flex-1 overflow-y-auto px-6 py-3">
          {
            mode === ModelModalModeEnum.configCustomModel && (
              <AuthForm
                formSchemas={modelNameAndTypeFormSchemas.map((formSchema) => {
                  return {
                    ...formSchema,
                    name: formSchema.variable,
                  }
                }) as FormSchema[]}
                defaultValues={modelNameAndTypeFormValues}
                inputClassName="justify-start"
                ref={formRef1}
                onChange={handleModelNameAndTypeChange}
              />
            )
          }
          {
            mode === ModelModalModeEnum.addCustomModelToModelList && (
              <CredentialSelector
                credentials={available_credentials || []}
                onSelect={setSelectedCredential}
                selectedCredential={selectedCredential}
                disabled={isLoading}
                notAllowAddNewCredential={notAllowCustomCredential}
              />
            )
          }
          {
            showCredentialLabel && (
              <div className="mt-6 mb-3 flex items-center system-xs-medium-uppercase text-text-tertiary">
                {t('modelProvider.auth.modelCredential', { ns: 'common' })}
                <div className="ml-2 h-px grow bg-linear-to-r from-divider-regular to-background-gradient-mask-transparent" />
              </div>
            )
          }
          {
            isLoading && (
              <div className="mt-3 flex items-center justify-center">
                <Loading />
              </div>
            )
          }
          {
            !isLoading
            && showCredentialForm
            && (
              <AuthForm
                formSchemas={formSchemas.map((formSchema) => {
                  return {
                    ...formSchema,
                    name: formSchema.variable,
                    showRadioUI: formSchema.type === FormTypeEnum.radio,
                  }
                }) as FormSchema[]}
                defaultValues={formValues}
                inputClassName="justify-start"
                ref={formRef2}
              />
            )
          }
        </div>
        <div className="flex shrink-0 justify-between p-6 pt-5">
          {
            (provider.help && (provider.help.title || provider.help.url))
              ? (
                  <a
                    href={provider.help?.url[language] || provider.help?.url.en_US}
                    target="_blank"
                    rel="noopener noreferrer"
                    className="mt-2 inline-block align-middle system-xs-regular text-text-accent"
                    onClick={e => !provider.help.url && e.preventDefault()}
                  >
                    {provider.help.title?.[language] || provider.help.url[language] || provider.help.title?.en_US || provider.help.url.en_US}
                    <LinkExternal02 className="mt-[-2px] ml-1 inline-block h-3 w-3" />
                  </a>
                )
              : <div />
          }
          <div className="ml-2 flex items-center justify-end space-x-2">
            {
              isEditMode && (
                <Button
                  variant="primary"
                  tone="destructive"
                  onClick={() => openConfirmDelete(credential, model)}
                >
                  {t('operation.remove', { ns: 'common' })}
                </Button>
              )
            }
            <Button
              onClick={onCancel}
            >
              {t('operation.cancel', { ns: 'common' })}
            </Button>
            <Button
              variant="primary"
              onClick={handleSave}
              disabled={isLoading || doingAction}
            >
              {saveButtonText}
            </Button>
          </div>
        </div>
        {
          (mode === ModelModalModeEnum.configCustomModel || mode === ModelModalModeEnum.configProviderCredential) && (
            <div className="shrink-0 border-t-[0.5px] border-t-divider-regular">
              <div className="flex items-center justify-center rounded-b-2xl bg-background-section-burn py-3 text-xs text-text-tertiary">
                <Lock01 className="mr-1 size-3 text-text-tertiary" />
                {t('modelProvider.encrypted.front', { ns: 'common' })}
                <a
                  className="mx-1 text-text-accent"
                  target="_blank"
                  rel="noopener noreferrer"
                  href="https://pycryptodome.readthedocs.io/en/latest/src/cipher/oaep.html"
                >
                  PKCS1_OAEP
                </a>
                {t('modelProvider.encrypted.back', { ns: 'common' })}
              </div>
            </div>
          )
        }
      </DialogContent>
      <AlertDialog open={!!deleteCredentialId} onOpenChange={handleConfirmOpenChange}>
        <AlertDialogContent backdropProps={{ forceRender: true }}>
          <div className="flex flex-col gap-2 p-6 pb-4">
            <AlertDialogTitle className="title-2xl-semi-bold text-text-primary">
              {t('modelProvider.confirmDelete', { ns: 'common' })}
            </AlertDialogTitle>
          </div>
          <AlertDialogActions>
            <AlertDialogCancelButton>{t('operation.cancel', { ns: 'common' })}</AlertDialogCancelButton>
            <AlertDialogConfirmButton
              disabled={doingAction}
              onClick={handleDeleteCredential}
            >
              {t('operation.confirm', { ns: 'common' })}
            </AlertDialogConfirmButton>
          </AlertDialogActions>
        </AlertDialogContent>
      </AlertDialog>
    </Dialog>
  )
}

export default memo(ModelModal)