/*
 * OpenLocalTool.js
 *
 * @author realor
 */

import { Tool } from './Tool.js'
import { IOManager } from '../io/IOManager.js'
import { ObjectUtils } from '../utils/ObjectUtils.js'
import { MessageDialog } from '../ui/MessageDialog.js'

class OpenLocalTool extends Tool {
    constructor(application, options) {
        super(application)
        this.name = 'openlocal'
        this.label = 'tool.openlocal.label'
        this.help = 'tool.openlocal.help'
        this.className = 'openlocal'
        this.setOptions(options)

        this._onChange = this.onChange.bind(this)
        this._onFocus = this.onFocus.bind(this)
    }

    activate() {
        let inputFile = document.createElement('input')
        this.inputFile = inputFile

        inputFile.type = 'file'
        inputFile.id = this.name + '_file'

        const extensions = IOManager.getSupportedLoaderExtensions()
        inputFile.accept = extensions.map(extension => '.' + extension).join(', ')

        document.body.appendChild(inputFile)
        inputFile.addEventListener('change', this._onChange, false)
        document.body.addEventListener('focus', this._onFocus, true)
        inputFile.click()
    }

    deactivate() {
        if (this.inputFile) {
            let parentNode = this.inputFile.parentNode
            parentNode.removeChild(this.inputFile)
        }
        document.body.removeEventListener('focus', this._onFocus, true)
    }

    onChange(event) {
        let files = this.inputFile.files
        if (files.length > 0) {
            let file = files[0]
            let reader = new FileReader()
            const application = this.application
            const t0 = Date.now()
            reader.onload = evt => {
                const t1 = Date.now()
                console.info('File read as text in ' + (t1 - t0) + ' millis.')

                let data = evt.target.result
                let intent = {
                    url: 'file://' + file.name,
                    data: data,
                    onProgress: data => {
                        application.progressBar.progress = data.progress
                        application.progressBar.message = data.message
                    },
                    onCompleted: object => {
                        object.updateMatrix()
                        application.initControllers(object)
                        application.addObject(object, application.baseObject, false, true)
                        let container = application.container
                        let aspect = container.clientWidth / container.clientHeight
                        let camera = application.camera

                        object.updateMatrixWorld(true)
                        ObjectUtils.zoomAll(camera, object, aspect)

                        application.notifyObjectsChanged(camera, this)
                        application.progressBar.visible = false
                    },
                    onError: error => {
                        console.error(error)
                        application.progressBar.visible = false
                        MessageDialog.create('ERROR', error)
                            .setClassName('error')
                            .setI18N(application.i18n)
                            .show()
                    },
                    manager: this.application.loadingManager,
                    units: application.units
                }
                IOManager.load(intent) // async load
            }
            application.progressBar.message = 'Loading file...'
            application.progressBar.progress = undefined
            application.progressBar.visible = true
            let formatInfo = IOManager.getFormatInfo(file.name)
            if (formatInfo.loader.dataType === 'arraybuffer') {
                reader.readAsArrayBuffer(file)
            } else {
                reader.readAsText(file)
            }
        }
    }

    onFocus(event) {
        this.application.useTool(null)
    }
}

export { OpenLocalTool }