import React, { Component } from "react";
import { MDCTextfield } from "@material/textfield/dist/mdc.textfield.js";
import { MDCDialog } from "@material/dialog/dist/mdc.dialog.js";

import "@material/form-field/dist/mdc.form-field.css";
import "@material/select/dist/mdc.select.css";
import "@material/textfield/dist/mdc.textfield.css";
import "@material/button/dist/mdc.button.css";
import "@material/dialog/dist/mdc.dialog.css";

import "./ExpenseForm.css";

class ExpenseForm extends Component {
  constructor(props) {
    super(props);

    this.state = { isValid: false };
  }

  handleInputChange = (event) => {
    const target = event.target;

    target.reportValidity();
    this.setState({ isValid: this.form.checkValidity() });
    this.props.onChange(target.name, target.value);
  }

  componentDidMount() {
    document.querySelectorAll(".mdc-textfield").forEach(selector => {
      new MDCTextfield(selector);
    });
    if (this.props.expense.id === undefined) {
      this.amountInput.focus();
    }
  }

  handleSubmit = (event) => {
    event.preventDefault();
    this.props.onSubmit();
  }

  initializeDeleteModal = (element) => {
    if (element) {
      this.dialog = new MDCDialog(element);
      this.dialog.listen("MDCDialog:accept", () => {
        // a fix for not closing the modal dialog properly
        document.body.className = document.body.className.replace(
          "mdc-dialog-scroll-lock",
          ""
        );
        this.props.onDelete(this.props.expense);
      });
    }
  }

  render() {
    return (
      <form
        onSubmit={this.handleSubmit}
        ref={form => {
          this.form = form;
        }}
        noValidate
      >
        <aside className="mdc-dialog" ref={this.initializeDeleteModal}>
          <div className="mdc-dialog__surface">
            <header className="mdc-dialog__header">
              <h2 className="mdc-dialog__header__title">
                Bist du dir sicher?
              </h2>
            </header>
            <section className="mdc-dialog__body">
              Möchtest du diese Ausgabe wirklich endgültig löschen?
            </section>
            <footer className="mdc-dialog__footer">
              <button
                type="button"
                className="mdc-button mdc-dialog__footer__button mdc-dialog__footer__button--cancel"
              >
                Cancel
              </button>
              <button
                type="button"
                className="mdc-button mdc-dialog__footer__button mdc-dialog__footer__button--accept"
              >
                Delete
              </button>
            </footer>
          </div>
        </aside>
        <div className="mdc-form-field">
          <div className="mdc-textfield">
            <input
              name="amount"
              className="mdc-textfield__input"
              ref={el => {
                this.amountInput = el;
              }}
              value={this.props.expense.amount}
              onChange={this.handleInputChange}
              type="number"
              step="0.01"
              min="0"
              required
            />
            <label className="mdc-textfield__label">Betrag</label>
          </div>
        </div>

        <div className="mdc-form-field">
          <select
            name="category"
            className="mdc-select"
            value={this.props.expense.category}
            onChange={this.handleInputChange}
            required
          >
            {this.props.categories.map(category =>
              <option value={category} key={category}>{category}</option>
            )}
          </select>
        </div>

        <div className="mdc-form-field">
          <div className="mdc-textfield">
            <input
              name="description"
              className="mdc-textfield__input"
              value={this.props.expense.description}
              onChange={this.handleInputChange}
              type="text"
            />
            <label className="mdc-textfield__label">Notiz</label>
          </div>
        </div>

        <div className="mdc-form-field">
          <div className="mdc-textfield">
            <input
              name="date"
              className="mdc-textfield__input"
              value={this.props.expense.date}
              onChange={this.handleInputChange}
              type="date"
              required
            />
            <label className="mdc-textfield__label">Datum</label>
          </div>
        </div>

        <div className="mdc-form-field">
          <select
            name="account"
            className="mdc-select"
            value={this.props.expense.account}
            onChange={this.handleInputChange}
            required
          >
            {this.props.accounts.map(account =>
              <option value={account} key={account}>{account}</option>
            )}
          </select>
        </div>

        <div className="mdc-form-field mdc-form-submit">
          <input
            type="submit"
            className="mdc-button"
            value={this.props.expense.id ? "Updaten" : "Hinzufügen"}
            disabled={!this.state.isValid}
          />
          {this.props.expense.id &&
            <input
              type="button"
              className="mdc-button"
              onClick={() => this.dialog.show()}
              value="Löschen"
            />}
          <input
            type="button"
            className="mdc-button"
            onClick={() => this.props.onCancel()}
            value="Schliessen"
          />
        </div>
      </form>
    );
  }
}

export default ExpenseForm;