/*
 * MoveTool.js
 *
 * @author realor
 */

import { TransformationTool } from './TransformationTool.js'
import { Controls } from '../ui/Controls.js'
import { I18N } from '../i18n/I18N.js'
import { PointSelector } from '../utils/PointSelector.js'
import * as THREE from '../lib/three.module.js'

class MoveTool extends TransformationTool {
    static CHANGED_PROPERTIES = ['position']

    constructor(application, options) {
        super(application)
        this.name = 'move'
        this.label = 'tool.move.label'
        this.className = 'move'
        this.snapDistance = 0.1
        this.snapPercent = 0.3
        this.setOptions(options)

        // internals
        this.anchorPointWorld = new THREE.Vector3()
        this.targetPointWorld = new THREE.Vector3()
        this.offset = 0
        this.moveVectorWorld = new THREE.Vector3()

        this.createPanel()
    }

    createPanel() {
        this.panel = this.application.createPanel(this.label, 'left', 'panel_move')
        this.panel.preferredHeight = 140

        this.helpElem = document.createElement('div')
        this.panel.bodyElem.appendChild(this.helpElem)

        this.offsetInputElem = Controls.addNumberField(this.panel.bodyElem, 'move_offset', 'label.offset', 0)
        this.offsetInputElem.step = this.snapDistance
        this.offsetInputElem.addEventListener(
            'change',
            event => {
                this.offset = this.offsetInputElem.value
                this.moveObjects()
            },
            false
        )

        this.buttonsPanel = document.createElement('div')
        this.panel.bodyElem.appendChild(this.buttonsPanel)

        this.acceptButton = Controls.addButton(this.buttonsPanel, 'cancel_section', 'button.accept', event => {
            this.offset = this.offsetInputElem.value
            this.moveObjects()
            this.setStage(0)
        })

        this.cancelButton = Controls.addButton(this.buttonsPanel, 'cancel_section', 'button.cancel', event => {
            this.offset = 0
            this.moveObjects()
            this.setStage(0)
        })
    }

    onPointerMove(event) {
        if (this.stage === 1) {
            const application = this.application
            const pointSelector = application.pointSelector
            if (!pointSelector.isPointSelectionEvent(event)) return

            event.preventDefault()

            const snap = pointSelector.snap
            if (snap) {
                this.targetPointWorld.copy(snap.positionWorld)
                const moveVectorWorld = this.moveVectorWorld
                moveVectorWorld.subVectors(this.targetPointWorld, this.anchorPointWorld)

                this.offset = moveVectorWorld.length()
                if (snap.type === PointSelector.GUIDE_SNAP) {
                    let divisions = this.offset / this.snapDistance
                    let intDivisions = Math.round(divisions)
                    let decimals = divisions - intDivisions
                    if (decimals >= -this.snapPercent && decimals <= this.snapPercent) {
                        const k = 1000000
                        this.offset = Math.round(k * intDivisions * this.snapDistance) / k
                    }
                }
                this.moveObjects()
                this.offsetInputElem.value = this.offset
            } else {
                this.offsetInputElem.value = null
            }
        }
    }

    onPointerUp(event) {
        const application = this.application
        const pointSelector = application.pointSelector
        if (!pointSelector.isPointSelectionEvent(event)) return

        const snap = pointSelector.snap
        if (snap) {
            if (this.stage === 0 || this.stage === 2) {
                // anchor point
                this.objectMatrices.clear()
                this.anchorPointWorld.copy(snap.positionWorld)

                if (snap.object) {
                    let axisMatrixWorld = this.axisMatrixWorld
                    if (snap.object) {
                        axisMatrixWorld.copy(snap.object.matrixWorld)
                    } else {
                        axisMatrixWorld.identity()
                    }
                    axisMatrixWorld.setPosition(this.anchorPointWorld)
                    if (application.selection.isEmpty()) {
                        application.selection.set(snap.object)
                    }
                }
                this.setStage(1)
            } else if (this.stage === 1) {
                // destination point
                this.setStage(2)
            }
        } else {
            this.setStage(0)
        }
    }

    setStage(stage) {
        this.stage = stage

        const application = this.application

        switch (stage) {
            case 0: // set anchor point
                this.offset = 0
                application.pointSelector.clearAxisGuides()
                application.pointSelector.excludeSelection = false
                application.pointSelector.auxiliaryPoints = []
                application.pointSelector.activate()
                this.offsetInputElem.parentElement.style.display = 'none'
                this.buttonsPanel.style.display = 'none'
                I18N.set(this.helpElem, 'innerHTML', 'tool.move.select_anchor_point')
                application.i18n.update(this.helpElem)
                break

            case 1: // set destination point
                application.pointSelector.setAxisGuides(this.axisMatrixWorld, true)
                application.pointSelector.excludeSelection = true
                application.pointSelector.auxiliaryPoints = []
                application.pointSelector.activate()
                this.offsetInputElem.parentElement.style.display = ''
                this.offsetInputElem.disabled = true
                this.buttonsPanel.style.display = 'none'
                I18N.set(this.helpElem, 'innerHTML', 'tool.move.select_destination_point')
                application.i18n.update(this.helpElem)
                break

            case 2: // set distance
                application.pointSelector.clearAxisGuides()
                application.pointSelector.excludeSelection = false
                application.pointSelector.auxiliaryPoints = []
                application.pointSelector.activate()
                this.offsetInputElem.parentElement.style.display = ''
                this.offsetInputElem.disabled = false
                this.buttonsPanel.style.display = ''
                I18N.set(this.helpElem, 'innerHTML', 'tool.move.edit_offset')
                application.i18n.update(this.helpElem)
                break
        }
    }

    moveObjects() {
        const application = this.application
        const moveVectorWorld = this.moveVectorWorld
        moveVectorWorld.subVectors(this.targetPointWorld, this.anchorPointWorld)
        moveVectorWorld.normalize()
        moveVectorWorld.multiplyScalar(this.offset)

        const moveMatrixWorld = this._matrix1
        moveMatrixWorld.identity().setPosition(moveVectorWorld)

        this.transformObjects(moveMatrixWorld, MoveTool.CHANGED_PROPERTIES)
    }

    resetTool() {
        super.resetTool()
        this.offset = 0
    }
}

export { MoveTool }