import React from 'react';
import PropTypes from 'prop-types';

import Project from '../../../model/Project';

import ComponentUtil from '../../../util/ComponentUtil';
import IDUtil from '../../../util/IDUtil';

import ProjectForm from './crud/ProjectForm';
import ProjectAPI from '../../../api/ProjectAPI';

/**
 * Returns the project list and send it to the output callback.
 *
 * FIXME this component does not handle new properties yet! (e.g. if you pass a new this.props.projects, the project list is NOT updated at all)
 */
export default class ProjectList extends React.Component {

    constructor(props) {
        super(props);
        this.state = {
            allProjects: this.props.projects || [],
            visibleProjects: this.props.projects || [],
            showNewProjectForm: false
        };
        this.filterField = React.createRef();
        this.CLASS_PREFIX = 'prl';
    }

    onProjectSaved = project => {
        if (project) {
            const projects = [...this.state.allProjects, project];
            this.setState(
                {
                    showNewProjectForm: false,
                    allProjects: projects,
                    visibleProjects: projects
                },
                () => this.selectProject(project.id)
            );
        }
    };

    handleProjectClicked = e => {
        this.selectProject(e.target.id);
    };

    selectProject = projectId => {
        const selectedProject = this.state.allProjects.filter(
            item => item.id === projectId
        );
        this.props.onSelect(selectedProject[0]);
        if (this.filterField.current) {
            this.filterField.current.value = '';
            this.filterProjects();
        }
    };

    filterProjects = () => {
        const filteredProjects = this.state.allProjects.filter(item =>
            item.name
                .toLowerCase()
                .includes(this.filterField.current.value.toLowerCase())
        );
        this.setState({
            visibleProjects: filteredProjects
        });
    };

    newProject = () => {
        this.setState({
            showNewProjectForm: true
        });
    };

    renderProjectForm = () => (
        <ProjectForm
            id="bg__project-selector"
            submitButton="save"
            onCancel={() => {
                ComponentUtil.hideModal(
                    this,
                    'showNewProjectForm',
                    'project__modal',
                    true
                );
            }}
            project={{
                name: '',
                description: '',
                user: this.props.user.id
            }}
            projectDidSave={projectId => {
                ProjectAPI.get(
                    this.props.user.id,
                    projectId,
                    project => {
                        if (project && project.id) {
                            this.onProjectSaved(project);
                        }
                    }
                );
                ComponentUtil.hideModal(
                    this,
                    'showNewProjectForm',
                    'project__modal',
                    true
                );
            }}
            user={this.props.user}
            api={ProjectAPI}
        />
    );

    renderProjectsList = modalOpened => {
        // remove active project from list of available options
        const listItems = this.props.activeProject ? this.state.visibleProjects.filter(
            item => item.name !== this.props.activeProject.name
        ) : this.state.visibleProjects;
        const menuClasses = [IDUtil.cssClassName('menu', this.CLASS_PREFIX)]
        if(modalOpened) {
            menuClasses.push('hidden');
        }

        // only show filter if there are more than N items (or something is typed in the filter)
        const showFilter = (this.filterField.current && this.filterField.current.value.length > 0) || listItems.length > 8;

        return (
            <ul className={menuClasses.join(' ')}>
                {showFilter && (
                    <input
                        ref={this.filterField}
                        type="text"
                        onChange={this.filterProjects}
                        placeholder="Filter projects"
                        className={IDUtil.cssClassName(
                            'filter-list',
                            this.CLASS_PREFIX
                        )}
                    />
                )}
                {listItems.map(item => (
                    <li
                        id={item.id}
                        key={item.id}
                        onClick={this.handleProjectClicked}
                    >
                        {item.name}
                    </li>
                ))}
                <button
                    onClick={this.newProject}
                    className={IDUtil.cssClassName('new', this.CLASS_PREFIX)}
                >
                    {' '}
                    + New Project
                </button>
            </ul>
        );
    };

    render() {
        const projectList = this.renderProjectsList(this.state.showNewProjectForm);
        const newProjectForm = this.state.showNewProjectForm
            ? this.renderProjectForm(this.props.newProjectInModal)
            : null;

        return (
            <label className={IDUtil.cssClassName('project-list')}>
                {this.props.activeProject && (this.props.activeProject.name !== null) ? (
                    <div className="active-project">
                        <div className={this.props.projectIcon ? 'title with-icon' : 'title'}>
                            {this.props.activeProject.name}
                        </div>
                        <a href={
                            '/workspace/projects/' +
                            this.props.activeProject.id
                        }
                        />
                    </div>
                ) : (
                    <div className="select">{this.props.buttonText}</div>
                )}
                <input
                    type="checkbox"
                    className={IDUtil.cssClassName(
                        'checkbox',
                        this.CLASS_PREFIX
                    )}
                />
                {projectList}
                {newProjectForm}
            </label>
        );
    }
}
ProjectList.propTypes = {
    onSelect: PropTypes.func.isRequired,
    buttonText: PropTypes.string.isRequired,
    projects: PropTypes.array,
    activeProject: Project.getPropTypes(false),
    user: PropTypes.shape({
        id: PropTypes.string.isRequired,
        name: PropTypes.string,
        attributes: PropTypes.shape({
            allowPersonalCollections: PropTypes.bool
        })
    }).isRequired,
    projectIcon: PropTypes.bool //whether or not to show the project icon
};