import { Component, PureComponent } from 'react';
import Autocomplete from '@mui/material/Autocomplete';
import TextField from '@mui/material/TextField';
import Typography from '@mui/material/Typography';
import Box from '@mui/material/Box';
import { EditablePanelTile } from '../../panels';
import { StorageManagerContext } from '../../../api/storageManagerContext';
import { requireDefined, requireObject } from '../../../utils/apiShape';
import { notifyError } from '../../../utils/notify';
class PanelValue extends Component {
  render() {
    const { label, children } = this.props;
    if (children == null || children === '') return null;
    return (
      <Box sx={{ mb: 1 }}>
        {label ? (
          <Typography variant="caption" color="text.secondary" display="block">
            {label}
          </Typography>
        ) : null}
        <Typography variant="body2" component="div">
          {children}
        </Typography>
      </Box>
    );
  }
}

function brandDraftValue(article) {
  return { name: article?.brand?.name ?? '' };
}

function brandDraftDirty(draft, saved) {
  return String(draft.name ?? '').trim() !== String(saved.name ?? '').trim();
}

function brandDraftValid(draft) {
  return String(draft.name ?? '').trim().length > 0;
}

const SECOND_ROW_MIN_HEIGHT = 220;

class BrandEdit extends Component {
  render() {
    const { draft, onChange, inputRef, brands } = this.props;
    return (
      <Autocomplete
        fullWidth
        freeSolo
        options={brands}
        value={draft.name ?? ''}
        inputValue={draft.name ?? ''}
        getOptionLabel={(option) =>
          typeof option === 'string' ? option : String(option.name ?? '')
        }
        onInputChange={(_event, value) => onChange({ name: value })}
        onChange={(_event, option) => {
          onChange({ name: option ? String(option.name ?? '') : '' });
        }}
        renderInput={(params) => (
          <TextField
            {...params}
            inputRef={inputRef}
            label="Marke"
            size="small"
            slotProps={{ inputLabel: { shrink: true } }}
          />
        )}
      />
    );
  }
}

export default class ArticleViewBrand extends PureComponent {
  static contextType = StorageManagerContext;

  constructor(props) {
    super(props);
    const brands = this.context?.brands;
    this.state = {
      brands: brands ?? [],
    };
    this._cancelled = false;
    this._brandsReady = brands != null;
  }

  componentDidMount() {
    this._cancelled = false;
    if (this._brandsReady) return;
    this.context.brandPromise
      .then((list) => {
        if (!this._cancelled) this.setState({ brands: list });
      })
      .catch((err) => {
        if (!this._cancelled) notifyError(err);
      });
  }

  componentWillUnmount() {
    this._cancelled = true;
  }

  handleSave = async (draft) => {
    const { article: articleData, onArticleUpdated } = this.props;
    const store = this.context;
    const { brands } = this.state;
    const name = String(draft.name ?? '').trim();
    if (!name) {
      throw new Error('Bitte eine Marke angeben.');
    }

    const existing = brands.find(
      (row) => String(row.name ?? '').toLowerCase() === name.toLowerCase(),
    );

    let brandId;
    if (existing) {
      brandId = existing.id;
    } else {
      const createdRes = await store.brand.upsert({ name });
      requireObject(createdRes, 'PUT /api/brand');
      requireObject(createdRes.brand, 'brand');
      requireDefined(createdRes.brand.id, 'brand.id');
      brandId = createdRes.brand.id;
      const nextBrands = await store.updateBrand();
      this.setState({ brands: nextBrands });
    }

    const res = await store.article.setBrand(articleData.sku, { brandId });
    requireObject(res, 'PUT /api/article/:sku/brand');
    requireObject(res.article, 'article');
    onArticleUpdated?.(res.article);
  };

  render() {
    const { article: articleData } = this.props;
    const { brands } = this.state;
    const value = brandDraftValue(articleData);

    return (
      <EditablePanelTile
        wide={1}
        minHeight={SECOND_ROW_MIN_HEIGHT}
        color="#e9d5ff"
        value={value}
        onSave={this.handleSave}
        isDirty={brandDraftDirty}
        canSave={brandDraftValid}
        display={<PanelValue>{value.name || null}</PanelValue>}
        edit={({ draft, onChange, inputRef }) => (
          <BrandEdit
            brands={brands}
            draft={draft}
            onChange={onChange}
            inputRef={inputRef}
          />
        )}
      />
    );
  }
}