/*
 * InspectGeometryTool.js
 *
 * @author realor
 */

import { Tool } from './Tool.js'
import { Tree } from '../ui/Tree.js'
import { TabbedPane } from '../ui/TabbedPane.js'
import { Controls } from '../ui/Controls.js'
import { Solid } from '../core/Solid.js'
import { SolidOptimizer } from '../core/SolidOptimizer.js'
import { ObjectUtils } from '../utils/ObjectUtils.js'
import { I18N } from '../i18n/I18N.js'
import * as THREE from '../lib/three.module.js'

class InspectGeometryTool extends Tool {
    constructor(application, options) {
        super(application)
        this.name = 'inspect_geometry'
        this.label = 'tool.inspect_geometry.label'
        this.className = 'inspect_geometry'

        this.object = null
        this.selectedNode = null
        this.highlightGroup = null
        this.lineMaterial = new THREE.LineBasicMaterial({ color: 0, linewidth: 1.5, depthTest: false, transparent: true })
        this.pointsMaterial = new THREE.PointsMaterial({ color: 0, size: 4, sizeAttenuation: false, depthTest: false, transparent: true })
        this.vertexMaterial = new THREE.PointsMaterial({ color: 0x000080, size: 8, sizeAttenuation: false, depthTest: false, transparent: true })

        this.sceneUuid = null

        this.setOptions(options)

        this.createPanel()
    }

    createPanel() {
        this.panel = this.application.createPanel(this.label, 'left')
        this.panel.bodyElem.classList.add('padding')

        this.tabbedPane = new TabbedPane(this.panel.bodyElem)

        const geometryInventoryPanel = this.tabbedPane.addTab('geom_inventory', 'label.geometry_inventory')
        geometryInventoryPanel.classList.add('inspect_geometry')

        const geometryPanel = this.tabbedPane.addTab('geom_detail', 'label.geometry_detail')
        geometryPanel.classList.add('inspect_geometry')

        // geometry inventory panel
        this.geometryToDisplayElem = Controls.addNumberField(geometryInventoryPanel, 'geom_to_display', 'label.geometries_display', '100', 'row')
        this.geometryToDisplayElem.style.width = '60px'

        this.searchButton = Controls.addButton(geometryInventoryPanel, 'geom_search', 'button.search', () => this.searchGeometries())

        this.listInvElem = document.createElement('ul')
        this.listInvElem.className = 'summary'
        geometryInventoryPanel.appendChild(this.listInvElem)

        this.geometryCountElem = document.createElement('li')
        this.listInvElem.appendChild(this.geometryCountElem)

        this.instanceCountElem = document.createElement('li')
        this.listInvElem.appendChild(this.instanceCountElem)

        this.modeledTriangleCountElem = document.createElement('li')
        this.listInvElem.appendChild(this.modeledTriangleCountElem)

        this.renderedTriangleCountElem = document.createElement('li')
        this.listInvElem.appendChild(this.renderedTriangleCountElem)

        this.listInvElem.style.display = 'none'

        this.geometryTable = Controls.addTable(
            geometryInventoryPanel,
            'geom_table',
            ['label.geometry_id', 'label.geometry_instances', 'label.geometry_triangles', 'label.geometry_total_triangles'],
            'data'
        )

        this.geometryTable.style.display = 'none'

        // geometry panel
        this.messageElem = document.createElement('div')
        this.messageElem.style.padding = '4px'
        geometryPanel.appendChild(this.messageElem)
        I18N.set(this.messageElem, 'innerHTML', 'tool.inspect_geometry.help')

        this.listElem = document.createElement('ul')
        this.listElem.className = 'summary'
        geometryPanel.appendChild(this.listElem)

        this.objectNameElem = document.createElement('li')
        this.listElem.appendChild(this.objectNameElem)

        this.geometryIdElem = document.createElement('li')
        this.listElem.appendChild(this.geometryIdElem)

        this.vertexCountElem = document.createElement('li')
        this.listElem.appendChild(this.vertexCountElem)

        this.faceCountElem = document.createElement('li')
        this.listElem.appendChild(this.faceCountElem)

        this.isManifoldElem = document.createElement('li')
        this.listElem.appendChild(this.isManifoldElem)

        this.optimizeButton = Controls.addButton(geometryPanel, 'optimize', 'button.optimize', () => this.optimize())
        this.optimizeButton.style.display = 'none'

        this.geometryTree = new Tree(geometryPanel)

        this._onPointerDown = this.onPointerDown.bind(this)
        this._onSelection = this.onSelection.bind(this)
    }

    activate() {
        const application = this.application
        const container = application.container
        container.addEventListener('pointerdown', this._onPointerDown, false)
        application.addEventListener('selection', this._onSelection, false)

        if (this.sceneUuid !== application.scene.uuid) {
            this.listInvElem.style.display = 'none'
            this.geometryTable.tBodies[0].innerHTML = ''
            this.geometryTable.style.display = 'none'
        }

        this.panel.visible = true

        let object = application.selection.object
        if (object instanceof Solid) {
            if (object !== this.object) {
                this.showSolid(object)
            }
        } else {
            this.clear()
        }
    }

    deactivate() {
        const application = this.application
        const container = application.container
        container.removeEventListener('pointerdown', this._onPointerDown, false)
        application.removeEventListener('selection', this._onSelection, false)

        this.panel.visible = false
    }

    onPointerDown(event) {
        if (!this.isCanvasEvent(event)) return

        const application = this.application
        const pointerPosition = this.getEventPosition(event)
        const baseObject = application.baseObject
        const intersect = this.intersect(pointerPosition, baseObject, true)
        if (intersect) {
            let object = intersect.object
            application.selection.set(object)
            this.tabbedPane.showTab('geom_detail')
        } else {
            application.selection.clear()
        }
    }

    onSelection() {
        const application = this.application
        const object = application.selection.object
        if (object instanceof Solid) {
            if (object !== this.object) {
                this.showSolid(object)
            }
        } else {
            this.clear()
        }
    }

    showSolid(solid) {
        this.object = solid
        this.clearHighlight()
        this.messageElem.style.display = 'none'

        const formatter = new Intl.NumberFormat()

        this.listElem.style.display = ''
        I18N.set(this.objectNameElem, 'innerHTML', 'message.object_name', solid.name)
        I18N.set(this.geometryIdElem, 'innerHTML', 'message.geometry_id', solid.geometry.id)
        I18N.set(this.faceCountElem, 'innerHTML', 'message.face_count', formatter.format(solid.geometry.faces.length))
        I18N.set(this.vertexCountElem, 'innerHTML', 'message.vertex_count', formatter.format(solid.geometry.vertices.length))
        I18N.set(this.isManifoldElem, 'innerHTML', 'message.is_manifold', solid.geometry.isManifold)
        this.application.i18n.updateTree(this.listElem)

        this.optimizeButton.style.display = ''

        const tree = this.geometryTree
        tree.clear()
        let geometry = solid.geometry
        const vertices = geometry.vertices

        const round = x => {
            return Math.round(x * 1000) / 1000
        }

        const vector2String = vector => {
            return '(' + round(vector.x) + ', ' + round(vector.y) + ', ' + round(vector.z) + ')'
        }

        const addVertices = (node, loop) => {
            const indices = loop.indices
            for (let i = 0; i < indices.length; i++) {
                let vertex = vertices[loop.indices[i]]
                let vertexNode = node.addNode('v-' + loop.indices[i] + ': ' + vector2String(vertex), () => this.highlight(vertexNode, solid, [loop], vertex), 'vertex')
            }
        }

        for (let f = 0; f < geometry.faces.length; f++) {
            let face = geometry.faces[f]
            let label = 'face-' + f + ' (' + face.outerLoop.indices.length + 'v'
            if (face.holes.length > 0) label += ', ' + face.holes.length + 'h)'
            else label += ')'

            let faceNode = tree.addNode(label, () => this.highlight(faceNode, solid, [face.outerLoop, ...face.holes]), 'face' + (face.holes.length > 0 ? ' holes' : ''))
            faceNode.addNode('normal: ' + vector2String(face.normal), () => {}, 'normal')

            let outerNode = faceNode.addNode('outerLoop (' + face.outerLoop.indices.length + 'v)', () => this.highlight(outerNode, solid, [face.outerLoop]), 'loop')
            addVertices(outerNode, face.outerLoop)
            for (let h = 0; h < face.holes.length; h++) {
                let hole = face.holes[h]
                let holeNode = faceNode.addNode('hole-' + h + ' (' + hole.indices.length + 'v)', () => this.highlight(holeNode, solid, [hole]), 'hole')
                addVertices(holeNode, hole)
            }
        }
    }

    clear() {
        this.geometryTree.clear()
        this.object = null
        this.clearHighlight()
        this.messageElem.style.display = ''
        this.listElem.style.display = 'none'
        this.optimizeButton.style.display = 'none'
    }

    addLoop(solid, loop) {
        const vertices = []
        const indices = loop.indices
        const matrixWorld = solid.matrixWorld

        for (let i = 0; i <= indices.length; i++) {
            vertices.push(
                loop
                    .getVertex(i % indices.length)
                    .clone()
                    .applyMatrix4(matrixWorld)
            )
        }

        let geometry = new THREE.BufferGeometry()
        geometry.setFromPoints(vertices)

        let lines = new THREE.Line(geometry, this.lineMaterial)
        lines.raycast = function() {}
        this.highlightGroup.add(lines)

        let points = new THREE.Points(geometry, this.pointsMaterial)
        points.raycast = function() {}
        this.highlightGroup.add(points)
    }

    highlight(node, solid, loops, vertex) {
        if (this.selectedNode !== null) {
            this.selectedNode.removeClass('selected')
        }
        node.addClass('selected')
        this.selectedNode = node

        if (this.highlightGroup !== null) {
            this.application.removeObject(this.highlightGroup)
        }
        this.highlightGroup = new THREE.Group()
        this.highlightGroup.renderOrder = 2

        for (let loop of loops) {
            this.addLoop(solid, loop)
        }

        if (vertex) {
            let geometry = new THREE.BufferGeometry()
            geometry.setFromPoints([vertex.clone().applyMatrix4(solid.matrixWorld)])
            let points = new THREE.Points(geometry, this.vertexMaterial)
            points.raycast = function() {}
            this.highlightGroup.add(points)
        }

        this.application.addObject(this.highlightGroup, this.application.overlays)
    }

    clearHighlight() {
        if (this.highlightGroup !== null) {
            this.application.removeObject(this.highlightGroup)
            this.highlightGroup = null
        }
        if (this.selectedNode !== null) {
            this.selectedNode.removeClass('selected')
            this.selectedNode = null
        }
    }

    optimize() {
        const object = this.object
        if (object !== null && object.type === 'Solid') {
            let optimizer = new SolidOptimizer(object.geometry)
            let geometry = optimizer.optimize()
            object.updateGeometry(geometry)
            this.showSolid(object)
            this.application.notifyObjectsChanged(object)
        }
    }

    searchGeometries() {
        const application = this.application
        this.sceneUuid = application.scene.uuid
        let geometryMap = new Map()
        let instanceCount = 0
        let modeledTriangleCount = 0
        let renderedTriangleCount = 0

        function traverse(object) {
            if (!object.visible) return

            if (object instanceof Solid) {
                let geometry = object.geometry
                let entry = geometryMap.get(geometry.id)
                if (entry === undefined) {
                    entry = {
                        geometry: geometry,
                        triangleCount: geometry.getTriangleCount(),
                        instances: []
                    }
                    geometryMap.set(geometry.id, entry)
                    modeledTriangleCount += entry.triangleCount
                }
                entry.instances.push(object)
                instanceCount++
                renderedTriangleCount += entry.triangleCount
            } else {
                const children = object.children
                for (let child of children) {
                    traverse(child)
                }
            }
        }

        traverse(application.baseObject)

        let entries = Array.from(geometryMap.values())
        entries.sort((a, b) => {
            let sizeA = a.triangleCount * a.instances.length
            let sizeB = b.triangleCount * b.instances.length
            return sizeB - sizeA
        })

        const formatter = new Intl.NumberFormat()

        this.listInvElem.style.display = ''
        I18N.set(this.geometryCountElem, 'innerHTML', 'message.geometry_count', formatter.format(entries.length))
        I18N.set(this.instanceCountElem, 'innerHTML', 'message.instance_count', formatter.format(instanceCount))
        I18N.set(this.modeledTriangleCountElem, 'innerHTML', 'message.modeled_triangle_count', formatter.format(modeledTriangleCount))
        I18N.set(this.renderedTriangleCountElem, 'innerHTML', 'message.rendered_triangle_count', formatter.format(renderedTriangleCount))
        this.application.i18n.updateTree(this.listInvElem)

        this.geometryTable.tBodies[0].innerHTML = ''

        let entryCount = Math.min(entries.length, parseInt(this.geometryToDisplayElem.value))

        for (let i = 0; i < entryCount; i++) {
            let entry = entries[i]
            let rowElem = Controls.addTableRow(this.geometryTable)
            rowElem.children[0].innerHTML = entry.geometry.id
            let instanceLink = document.createElement('a')
            instanceLink.href = '#'
            instanceLink.innerHTML = '' + formatter.format(entry.instances.length)
            instanceLink.addEventListener('click', () => this.showInstances(entry))
            rowElem.children[1].appendChild(instanceLink)
            rowElem.children[2].innerHTML = formatter.format(entry.triangleCount)
            rowElem.children[3].innerHTML = formatter.format(entry.triangleCount * entry.instances.length)
        }
        this.geometryTable.style.display = ''
    }

    showInstances(entry) {
        this.application.selection.set(...entry.instances)
    }
}

export { InspectGeometryTool }