// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
// This file is part of Parity.

// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Parity.  If not, see <http://www.gnu.org/licenses/>.

import BigNumber from 'bignumber.js';
import React, { Component, PropTypes } from 'react';
import LinearProgress from 'material-ui/LinearProgress';
import { Card, CardActions, CardTitle, CardText } from 'material-ui/Card';

import { Button, Input, InputAddress, InputAddressSelect } from '~/ui';

import styles from './queries.css';

export default class InputQuery extends Component {
  static contextTypes = {
    api: PropTypes.object
  }

  static propTypes = {
    contract: PropTypes.object.isRequired,
    inputs: PropTypes.array.isRequired,
    outputs: PropTypes.array.isRequired,
    name: PropTypes.string.isRequired,
    signature: PropTypes.string.isRequired,
    className: PropTypes.string
  }

  state = {
    isValid: true,
    results: [],
    values: {}
  }

  render () {
    const { name, className } = this.props;

    return (
      <Card
        className={ className }
        >
        <CardTitle
          className={ styles.methodTitle }
          title={ name }
        />
        { this.renderContent() }
      </Card>
    );
  }

  renderContent () {
    const { inputs } = this.props;

    const { isValid } = this.state;

    const inputsFields = inputs
      .map(input => this.renderInput(input));

    return (
      <div>
        <CardText
          className={ styles.methodContent }
        >
          <div className={ styles.methodResults }>
            { this.renderResults() }
          </div>
          { inputsFields }
        </CardText>
        <CardActions>
          <Button
            label='Query'
            disabled={ !isValid }
            onClick={ this.onClick } />
        </CardActions>
      </div>
    );
  }

  renderResults () {
    const { results, isLoading } = this.state;
    const { outputs } = this.props;

    if (isLoading) {
      return (<LinearProgress mode='indeterminate' />);
    }

    if (!results || results.length < 1) {
      return null;
    }

    return outputs
      .map((out, index) => ({
        name: out.name,
        type: out.type,
        value: results[index],
        display: this.renderValue(results[index])
      }))
      .sort((outA, outB) => outA.display.length - outB.display.length)
      .map((out, index) => {
        let input = null;
        if (out.type === 'address') {
          input = (
            <InputAddress
              className={ styles.queryValue }
              disabled
              value={ out.display }
            />
          );
        } else {
          input = (
            <Input
              className={ styles.queryValue }
              readOnly
              allowCopy
              value={ out.display }
            />
          );
        }

        return (
          <div key={ index }>
            <div className={ styles.queryResultName }>
              { out.name }
            </div>
            { input }
          </div>
        );
      });
  }

  renderInput (input) {
    const { values } = this.state;
    const { name, type } = input;
    const label = `${name ? `${name}: ` : ''}${type}`;

    const onChange = (event, input) => {
      const value = event && event.target.value || input;
      const { values } = this.state;

      this.setState({
        values: {
          ...values,
          [ name ]: value
        }
      });
    };

    if (type === 'address') {
      return (
        <div key={ name }>
          <InputAddressSelect
            hint={ type }
            label={ label }
            value={ values[name] }
            required
            onChange={ onChange }
          />
        </div>
      );
    }

    return (
      <div key={ name }>
        <Input
          hint={ type }
          label={ label }
          value={ values[name] }
          required
          onChange={ onChange }
        />
      </div>
    );
  }

  renderValue (value) {
    if (value === null || value === undefined) {
      return 'no data';
    }

    const { api } = this.context;

    if (api.util.isInstanceOf(value, BigNumber)) {
      return value.toFormat(0);
    } else if (api.util.isArray(value)) {
      return api.util.bytesToHex(value);
    }

    return value.toString();
  }

  onClick = () => {
    const { values } = this.state;
    const { inputs, contract, name, outputs, signature } = this.props;

    this.setState({
      isLoading: true,
      results: []
    });

    const inputValues = inputs.map(input => values[input.name]);

    contract
      .instance[signature]
      .call({}, inputValues)
      .then(results => {
        if (outputs.length === 1) {
          results = [ results ];
        }

        this.setState({
          isLoading: false,
          results
        });
      })
      .catch(e => {
        console.error(`sending ${name} with params`, inputValues, e);
      });
  };
}