/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

import { Component } from "resource://devtools/client/shared/vendor/react.mjs";
import PropTypes from "resource://devtools/client/shared/vendor/react-prop-types.mjs";
import * as dom from "resource://devtools/client/shared/vendor/react-dom-factories.mjs";

const { input, span, td } = dom;

/**
 * This template represents a cell in TreeView row. It's rendered
 * using <td> element (the row is <tr> and the entire tree is <table>).
 */
class TreeCell extends Component {
  // See TreeView component for detailed property explanation.
  static get propTypes() {
    return {
      value: PropTypes.any,
      decorator: PropTypes.object,
      id: PropTypes.string.isRequired,
      member: PropTypes.object.isRequired,
      renderValue: PropTypes.func.isRequired,
      enableInput: PropTypes.bool,
    };
  }

  constructor(props) {
    super(props);

    this.state = {
      inputEnabled: false,
    };

    this.getCellClass = this.getCellClass.bind(this);
    this.updateInputEnabled = this.updateInputEnabled.bind(this);
  }

  /**
   * Optimize cell rendering. Rerender cell content only if
   * the value or expanded state changes.
   */
  shouldComponentUpdate(nextProps, nextState) {
    return (
      this.props.value !== nextProps.value ||
      this.state !== nextState ||
      this.props.member.open !== nextProps.member.open
    );
  }

  getCellClass(object, id) {
    const decorator = this.props.decorator;
    if (!decorator || !decorator.getCellClass) {
      return [];
    }

    // Decorator can return a simple string or array of strings.
    let classNames = decorator.getCellClass(object, id);
    if (!classNames) {
      return [];
    }

    if (typeof classNames == "string") {
      classNames = [classNames];
    }

    return classNames;
  }

  updateInputEnabled(evt) {
    this.setState(
      Object.assign({}, this.state, {
        inputEnabled: evt.target.nodeName.toLowerCase() !== "input",
      })
    );
  }

  render() {
    let { member, id, value, decorator, renderValue, enableInput } = this.props;
    const type = member.type || "";

    // Compute class name list for the <td> element.
    const classNames = this.getCellClass(member.object, id) || [];
    classNames.push("treeValueCell");
    classNames.push(type + "Cell");

    // Render value using a default render function or custom
    // provided function from props or a decorator.
    renderValue = renderValue || defaultRenderValue;
    if (decorator?.renderValue) {
      renderValue = decorator.renderValue(member.object, id) || renderValue;
    }

    const props = Object.assign({}, this.props, {
      object: value,
    });

    let cellElement;
    if (enableInput && this.state.inputEnabled && type !== "object") {
      classNames.push("inputEnabled");
      cellElement = input({
        autoFocus: true,
        onBlur: this.updateInputEnabled,
        readOnly: true,
        value,
        "aria-labelledby": id,
      });
    } else {
      cellElement = span(
        {
          onClick: type !== "object" ? this.updateInputEnabled : null,
        },
        renderValue(props)
      );
    }

    // Render me!
    return td(
      {
        className: classNames.join(" "),
        role: "presentation",
      },
      cellElement
    );
  }
}

// Default value rendering.
const defaultRenderValue = props => {
  return props.object + "";
};

// Exports from this module
export default TreeCell;