import React from 'react'

import InputButton from './InputButton'
import Modal from './Modal'
import FieldType from './FieldType'
import FieldId from './FieldId'
import FieldSource from './FieldSource'
import FieldSourceLayer from './FieldSourceLayer'
import type {LayerSpecification} from 'maplibre-gl'

type ModalAddProps = {
  layers: LayerSpecification[]
  onLayersChange(layers: LayerSpecification[]): unknown
  isOpen: boolean
  onOpenToggle(open: boolean): unknown
  // A dict of source id's and the available source layers
  sources: any
};

type ModalAddState = {
  type: LayerSpecification["type"]
  id: string
  source?: string
  'source-layer'?: string
};

export default class ModalAdd extends React.Component<ModalAddProps, ModalAddState> {
  addLayer = () => {
    const changedLayers = this.props.layers.slice(0)
    const layer: ModalAddState = {
      id: this.state.id,
      type: this.state.type,
    }

    if(this.state.type !== 'background') {
      layer.source = this.state.source
      if(this.state.type !== 'raster' && this.state['source-layer']) {
        layer['source-layer'] = this.state['source-layer']
      }
    }

    changedLayers.push(layer as LayerSpecification)

    this.props.onLayersChange(changedLayers)
    this.props.onOpenToggle(false)
  }

  constructor(props: ModalAddProps) {
    super(props)
    const state: ModalAddState = {
      type: 'fill',
      id: '',
    }

    if(props.sources.length > 0) {
      state.source = Object.keys(this.props.sources)[0];
      state['source-layer'] = this.props.sources[state.source as keyof ModalAddProps["sources"]][0]
    }
    this.state = state;
  }

  componentDidUpdate(_prevProps: ModalAddProps, prevState: ModalAddState) {
    // Check if source is valid for new type
    const oldType = prevState.type;
    const newType = this.state.type;

    const availableSourcesOld = this.getSources(oldType);
    const availableSourcesNew = this.getSources(newType);

    if(
    // Type has changed
      oldType !== newType
      && prevState.source !== ""
      // Was a valid source previously
      && availableSourcesOld.indexOf(prevState.source!) > -1
      // And is not a valid source now
      && availableSourcesNew.indexOf(this.state.source!) < 0
    ) {
      // Clear the source
      this.setState({
        source: ""
      });
    }
  }

  getLayersForSource(source: string) {
    const sourceObj = this.props.sources[source] || {};
    return sourceObj.layers || [];
  }

  getSources(type: string) {
    const sources = [];

    const types = {
      vector: [
        "fill",
        "line",
        "symbol",
        "circle",
        "fill-extrusion",
        "heatmap"
      ],
      raster: [
        "raster"
      ],
      geojson: [
        "fill",
        "line",
        "symbol",
        "circle",
        "fill-extrusion",
        "heatmap"
      ]
    }

    for(const [key, val] of Object.entries(this.props.sources) as any) {
      const valType = val.type as keyof typeof types;
      if(types[valType] && types[valType].indexOf(type) > -1) {
        sources.push(key);
      }
    }

    return sources;
  }


  render() {
    const sources = this.getSources(this.state.type);
    const layers = this.getLayersForSource(this.state.source!);

    return <Modal
      isOpen={this.props.isOpen}
      onOpenToggle={this.props.onOpenToggle}
      title={'Add Layer'}
      data-wd-key="modal:add-layer"
      className="maputnik-add-modal"
    >
      <div className="maputnik-add-layer">
        <FieldId
          value={this.state.id}
          wdKey="add-layer.layer-id"
          onChange={(v: string) => {
            this.setState({ id: v })
          }}
        />
        <FieldType
          value={this.state.type}
          wdKey="add-layer.layer-type"
          onChange={(v: LayerSpecification["type"]) => this.setState({ type: v })}
        />
        {this.state.type !== 'background' &&
      <FieldSource
        sourceIds={sources}
        wdKey="add-layer.layer-source-block"
        value={this.state.source}
        onChange={(v: string) => this.setState({ source: v })}
      />
        }
        {['background', 'raster', 'hillshade', 'heatmap'].indexOf(this.state.type) < 0 &&
      <FieldSourceLayer
        isFixed={true}
        sourceLayerIds={layers}
        value={this.state['source-layer']}
        onChange={(v: string) => this.setState({ 'source-layer': v })}
      />
        }
        <InputButton
          className="maputnik-add-layer-button"
          onClick={this.addLayer}
          data-wd-key="add-layer"
        >
        Add Layer
        </InputButton>
      </div>
    </Modal>
  }
}