import makeStyles from "@material-ui/core/styles/makeStyles";
import TextField from "@material-ui/core/TextField";
import AppHeader from "@saleor/components/AppHeader";
import CardSpacer from "@saleor/components/CardSpacer";
import { ConfirmButtonTransitionState } from "@saleor/components/ConfirmButton";
import Container from "@saleor/components/Container";
import CountryList from "@saleor/components/CountryList";
import Form from "@saleor/components/Form";
import Grid from "@saleor/components/Grid";
import Metadata from "@saleor/components/Metadata/Metadata";
import { MetadataFormData } from "@saleor/components/Metadata/types";
import { MultiAutocompleteChoiceType } from "@saleor/components/MultiAutocompleteSelectField";
import PageHeader from "@saleor/components/PageHeader";
import SaveButtonBar from "@saleor/components/SaveButtonBar";
import { SingleAutocompleteChoiceType } from "@saleor/components/SingleAutocompleteSelectField";
import { ShippingErrorFragment } from "@saleor/fragments/types/ShippingErrorFragment";
import {
  ShippingZoneDetailsFragment,
  ShippingZoneDetailsFragment_warehouses
} from "@saleor/fragments/types/ShippingZoneDetailsFragment";
import { SubmitPromise } from "@saleor/hooks/useForm";
import useStateFromProps from "@saleor/hooks/useStateFromProps";
import createMultiAutocompleteSelectHandler from "@saleor/utils/handlers/multiAutocompleteSelectChangeHandler";
import { mapMetadataItemToInput } from "@saleor/utils/maps";
import useMetadataChangeTrigger from "@saleor/utils/metadata/useMetadataChangeTrigger";
import React from "react";
import { FormattedMessage, useIntl } from "react-intl";

import { getStringOrPlaceholder } from "../../../misc";
import { ChannelProps, FetchMoreProps, SearchProps } from "../../../types";
import { ShippingMethodTypeEnum } from "../../../types/globalTypes";
import ShippingZoneInfo from "../ShippingZoneInfo";
import ShippingZoneRates from "../ShippingZoneRates";
import ShippingZoneWarehouses from "../ShippingZoneWarehouses";

export interface FormData extends MetadataFormData {
  name: string;
  description: string;
  warehouses: string[];
}

const maxDescriptionLength = 300;

const useStyles = makeStyles(
  {
    label: {
      flex: 1
    },
    labelContainer: {
      "& span": {
        paddingRight: 30
      },
      display: "flex"
    }
  },
  { name: "ShippingZoneDetailsPage" }
);

export interface ShippingZoneDetailsPageProps
  extends FetchMoreProps,
    SearchProps,
    ChannelProps {
  disabled: boolean;
  errors: ShippingErrorFragment[];
  saveButtonBarState: ConfirmButtonTransitionState;
  shippingZone: ShippingZoneDetailsFragment;
  warehouses: ShippingZoneDetailsFragment_warehouses[];
  onBack: () => void;
  onCountryAdd: () => void;
  onCountryRemove: (code: string) => void;
  onDelete: () => void;
  onPriceRateAdd: () => void;
  onPriceRateEdit: (id: string) => void;
  onRateRemove: (rateId: string) => void;
  onSubmit: (data: FormData) => SubmitPromise;
  onWarehouseAdd: () => void;
  onWeightRateAdd: () => void;
  onWeightRateEdit: (id: string) => void;
}

function warehouseToChoice(
  warehouse: Record<"id" | "name", string>
): SingleAutocompleteChoiceType {
  return {
    label: warehouse.name,
    value: warehouse.id
  };
}

const ShippingZoneDetailsPage: React.FC<ShippingZoneDetailsPageProps> = ({
  disabled,
  errors,
  hasMore,
  loading,
  onBack,
  onCountryAdd,
  onCountryRemove,
  onDelete,
  onFetchMore,
  onPriceRateAdd,
  onPriceRateEdit,
  onRateRemove,
  onSearchChange,
  onSubmit,
  onWarehouseAdd,
  onWeightRateAdd,
  onWeightRateEdit,
  saveButtonBarState,
  selectedChannelId,
  shippingZone,
  warehouses
}) => {
  const intl = useIntl();
  const classes = useStyles({});

  const initialForm: FormData = {
    description: shippingZone?.description || "",
    metadata: shippingZone?.metadata.map(mapMetadataItemToInput),
    name: shippingZone?.name || "",
    privateMetadata: shippingZone?.privateMetadata.map(mapMetadataItemToInput),
    warehouses: shippingZone?.warehouses?.map(warehouse => warehouse.id) || []
  };
  const [warehouseDisplayValues, setWarehouseDisplayValues] = useStateFromProps<
    MultiAutocompleteChoiceType[]
  >(
    shippingZone?.warehouses?.map(warehouse => ({
      label: warehouse.name,
      value: warehouse.id
    })) || []
  );

  const warehouseChoices = warehouses.map(warehouseToChoice);

  const {
    makeChangeHandler: makeMetadataChangeHandler
  } = useMetadataChangeTrigger();

  return (
    <Form initial={initialForm} onSubmit={onSubmit}>
      {({ change, data, hasChanged, submit, toggleValue }) => {
        const handleWarehouseChange = createMultiAutocompleteSelectHandler(
          toggleValue,
          setWarehouseDisplayValues,
          warehouseDisplayValues,
          warehouseChoices
        );

        const changeMetadata = makeMetadataChangeHandler(change);
        const description = data.description;

        return (
          <Container>
            <AppHeader onBack={onBack}>
              <FormattedMessage defaultMessage="Shipping" />
            </AppHeader>
            <PageHeader title={shippingZone?.name} />
            <Grid>
              <div>
                <ShippingZoneInfo
                  data={data}
                  disabled={disabled}
                  errors={errors}
                  onChange={change}
                />
                <CardSpacer />
                <CountryList
                  countries={shippingZone?.countries}
                  disabled={disabled}
                  emptyText={getStringOrPlaceholder(
                    shippingZone?.default === undefined
                      ? undefined
                      : shippingZone.default
                      ? intl.formatMessage({
                          defaultMessage:
                            "This is default shipping zone, which means that it covers all of the countries which are not assigned to other shipping zones"
                        })
                      : intl.formatMessage({
                          defaultMessage:
                            "Currently, there are no countries assigned to this shipping zone"
                        })
                  )}
                  onCountryAssign={onCountryAdd}
                  onCountryUnassign={onCountryRemove}
                  title={intl.formatMessage({
                    defaultMessage: "Countries"
                  })}
                />
                <CardSpacer />
                <ShippingZoneRates
                  disabled={disabled}
                  onRateAdd={onPriceRateAdd}
                  onRateEdit={onPriceRateEdit}
                  onRateRemove={onRateRemove}
                  rates={shippingZone?.shippingMethods?.filter(
                    method => method.type === ShippingMethodTypeEnum.PRICE
                  )}
                  variant="price"
                  selectedChannelId={selectedChannelId}
                />
                <CardSpacer />
                <ShippingZoneRates
                  disabled={disabled}
                  onRateAdd={onWeightRateAdd}
                  onRateEdit={onWeightRateEdit}
                  onRateRemove={onRateRemove}
                  rates={shippingZone?.shippingMethods?.filter(
                    method => method.type === ShippingMethodTypeEnum.WEIGHT
                  )}
                  variant="weight"
                  selectedChannelId={selectedChannelId}
                />
                <CardSpacer />
                <Metadata data={data} onChange={changeMetadata} />
              </div>
              <div>
                <ShippingZoneWarehouses
                  data={data}
                  displayValues={warehouseDisplayValues}
                  hasMore={hasMore}
                  loading={loading}
                  onChange={handleWarehouseChange}
                  onFetchMore={onFetchMore}
                  onSearchChange={onSearchChange}
                  onWarehouseAdd={onWarehouseAdd}
                  warehouses={warehouseChoices}
                />
              </div>
              <TextField
                error={description.length > maxDescriptionLength}
                name={"description"}
                label={
                  <div className={classes.labelContainer}>
                    <div className={classes.label}>
                      <FormattedMessage defaultMessage="Description" />
                    </div>
                    {description?.length > 0 && (
                      <span>
                        <FormattedMessage
                          defaultMessage="{numberOfCharacters} of {maxCharacters} characters"
                          description="character limit"
                          values={{
                            maxCharacters: maxDescriptionLength,
                            numberOfCharacters: description.length
                          }}
                        />
                      </span>
                    )}
                  </div>
                }
                InputProps={{
                  inputProps: {
                    maxLength: maxDescriptionLength
                  }
                }}
                value={description}
                onChange={change}
                disabled={loading || disabled}
                fullWidth
                multiline
                placeholder={"placeholder"}
                rows={10}
              />
            </Grid>
            <SaveButtonBar
              disabled={disabled || !hasChanged}
              onCancel={onBack}
              onDelete={onDelete}
              onSave={submit}
              state={saveButtonBarState}
            />
          </Container>
        );
      }}
    </Form>
  );
};
ShippingZoneDetailsPage.displayName = "ShippingZoneDetailsPage";
export default ShippingZoneDetailsPage;