/*Copyright (C) 2019 Centro de Computacao Cientifica e Software Livre
Departamento de Informatica - Universidade Federal do Parana

This file is part of Plataforma Integrada MEC.

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

Plataforma Integrada MEC 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 Affero General Public License for more details.

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

import React, { useState } from 'react';
import { Grid } from '@material-ui/core';
import styled from 'styled-components';
import Button from '@material-ui/core/Button';
import CheckBoxOutlineBlankIcon from '@material-ui/icons/CheckBoxOutlineBlank';
import CheckBoxIcon from '@material-ui/icons/CheckBox';
import GetAppIcon from '@material-ui/icons/GetApp';
import ResourceCardFunction from './ResourceCardFunction.js';


export default function ResourceList(props) {
	const [selected, setSelected] = useState(Array.apply(
		null, {length: props.resources.length}).map(i => false));
	const [selectable, setSelectable] = useState(false);

	const updateSelected = (index) => {
		let new_selected = selected.slice();
		new_selected[index] = !new_selected[index];
		setSelected(new_selected);
	}

	const checkBoxIcon = (s) => {
		if (s)
			return <CheckBoxIcon />;
		else
			return <CheckBoxOutlineBlankIcon />;
	}

	return (
		<ResourceListContainer>
			<Grid container direction="row" justify="space-between" alignItems="center">
				<Grid item>
					<Title>{props.resources.length} recurso{props.resources.length == 1 ? "" : "s"}</Title>
				</Grid>
				<Grid item>
					<Button color="primary" onClick={() => setSelectable(!selectable)}>
						<PanelButtonText>
							Ativar seleção
						</PanelButtonText>
					</Button>
				</Grid>
				<Grid item>
					<Button 
						color="primary" 
						variant="outlined"
						startIcon={<GetAppIcon fontSize="large"/>}
					>
						<PanelButtonText>baixar seleção</PanelButtonText>
					</Button>
				</Grid>
			</Grid>
			<Grid container direction="row" justify="space-around" alignItems="center">
			{props.resources.map((r) => {
					return (
						<Grid item key={r.title}>
							<ResourceCardFunction
								type={r.type}
								author={r.author}
								tags={r.tags}
								published={r.published}
								title={r.title}
								rating={r.rating}
								likeCount={r.likeCount}
								liked={r.liked}
								thumbnail={r.thumbnail}
							/>
							{selectable ? 
								(<SelectButton
									variant="outline"
									color="primary"
									startIcon={checkBoxIcon(selected[props.resources.indexOf(r)])}
									onClick={() => updateSelected(props.resources.indexOf(r))}
								>
									Selecionar
								</SelectButton>)
								:
								<span></span>}
								
						</Grid>
					);
				})}
			</Grid>
		</ResourceListContainer>
	);
}

const ResourceListContainer=styled.div`
	margin-left: 20;
	margin-right: 20;
`
const Title=styled.p`
	color: rgb(102, 102, 102);
	font-size: 2em;
	font-weigth: 300;
`
const SelectButton=styled(Button)`
	width: 100%;
`
const PanelButtonText=styled.span` 
	font-weight: 900;
`