const TOML = require('./mini-st.js')

let deleteHotspot = null
let grabHotspot = null

/**
 * Sets listener and attributes on model-viewer to
 * allow for click registering of a new hotspot
 */
readyAddHotspot = function() {
    disableViewer('AddingHotspot', clickAddHotspot)
}

/**
 * Event listener callback to retrieve the info
 * about the model surface point selected by the
 * mouse and add that information to the editor
 * text input
 * 
 * @param {PointerEvent} e 
 */
clickAddHotspot = function(e) {
    let hsPosition = null
    let targetModel = enableViewer()
    if (targetModel) {
        hsPosition = targetModel.positionAndNormalFromPoint(e.clientX, e.clientY)
    }
    if (hsPosition) {
        let currentText = $('#wpTextbox1').val()
        let [_, mvconfig] = extractMvconfig(currentText)
        let hsOutput = {}
        hsOutput['data-position'] = hsPosition.position.toString().replaceAll(/(\d{5})(\d*?m)/g,"$1m")
        hsOutput['data-normal'] = hsPosition.normal.toString().replaceAll(/(\d{5})(\d*?m)/g,"$1m")
        hsOutput['data-orbit'] = orb2degree(targetModel.getCameraOrbit().toString(),[2,2,5])
        let targetObj = targetModel.getCameraTarget()
        hsOutput['data-target'] = `${targetObj.x.toFixed(5)}m ${targetObj.y.toFixed(5)}m ${targetObj.z.toFixed(5)}m`
        hsOutput['field-of-view'] = Number.parseFloat(targetModel.getFieldOfView()).toFixed(5) + 'deg'
        mvconfig.annotations['Hotspot ' + (Object.keys(mvconfig.annotations).length + 1)] = hsOutput
        let newText = currentText.replace(/(.*?<mvconfig>)[\S\s]*?(<\/mvconfig>.*)/,`$1\n${TOML.stringify(mvconfig, null, 2)}\n$2`)
        $('#wpTextbox1').val(newText)
    }
    readMvconfig()
}

/**
 * Set flag and attributes on model-viewer to
 * delete the next hotspot that is clicked
 */
readyDelHotspot = function() {
    deleteHotspot = true
    disableViewer('DeletingHotspot', cancelDeleteHotspot)
}

/**
 * Unset deleting flag and return normal
 * function and style to model viewer
 */
cancelDeleteHotspot = function() {
    deleteHotspot = null
    enableViewer()
}

/**
 * Delete the selected hotspot
 * 
 * @param {element} hs hotspot element to delete
 */
clickDeleteHotspot = function (hs) {
    deleteHotspot = null
    enableViewer()
    const anName = hs.target.childNodes[0].innerText
    let purgeAnnotation = new RegExp('(?<="annotationSets"[\\S\\s]*?)(^.*?' + anName + '.*\n)','gm')
    hs.target.remove()
    const editText = $('#wpTextbox1').val()
    const newText = editText.replace(purgeAnnotation,'')
    const finalText = newText.replace(/(,)(\n\s+])/gm,'$2')
    $('#wpTextbox1').val(finalText)
    writeMvconfig()
    readMvconfig()
}

/**
 * Check status of delete function
 */
isDeleting = function() {
    return deleteHotspot
}

/**
 * Prepare to drag a hotspot
 * 
 * @param {MouseEvent} event
 */
grabAnnotation = function(e) {
    if (e.ctrlKey) {
        grabHotspot = {x: e.x, y: e.y}
        const contEl = $('.glmv-container')[0]
        contEl.addEventListener('mousemove', moveAnnotation)
        const mvEl = $('model-viewer')[0]
    } else {
        grabHotspot = null
    }
}

/**
 * Drag currently clicked hotspot
 * 
 * @param {MouseEvent} event
 */
moveAnnotation = function(e) {
    if (grabHotspot) {
        grabHotspot.move = true
        e.target.style['transform'] = `translate(${e.x - grabHotspot.x}px, ${e.y - grabHotspot.y}px) scale(1.1,1.1)`
    }
}

/**
 * End dragging a hotspot and update information
 * 
 * @param {MouseEvent} event
 */
releaseAnnotation = function(e) {
    if (grabHotspot && grabHotspot.move) {
        e.target.style['transform']=''
        const contEl = $('.glmv-container')[0]
        contEl.removeEventListener('mousemove', moveAnnotation)
        const mvEl = $('model-viewer')[0]
        let newPosition = mvEl.positionAndNormalFromPoint(e.clientX, e.clientY)
        const newPos = newPosition.position.toString().replaceAll(/(\d{5})(\d*?m)/g,"$1m")
        const newNorm = newPosition.normal.toString().replaceAll(/(\d{5})(\d*?m)/g,"$1m")
        mvEl.updateHotspot({
            name: e.target.slot,
            position: newPos,
            normal: newNorm
        })
        const newOrb = orb2degree(mvEl.getCameraOrbit().toString(),[2,2,5])
        e.target.setAttribute('data-orbit', newOrb)
        let targetObj = mvEl.getCameraTarget()
        const newTarg = `${targetObj.x.toFixed(5)}m ${targetObj.y.toFixed(5)}m ${targetObj.z.toFixed(5)}m`
        e.target.setAttribute('data-target', newTarg)
        const newFov = Number.parseFloat(mvEl.getFieldOfView()).toFixed(5) + 'deg'
        e.target.setAttribute('field-of-view', newFov)
        let currentText = $('#wpTextbox1').val()
        let [_, mvconfig] = extractMvconfig(currentText)
        mvconfig.annotations[e.target.childNodes[0].innerText] = {
            "data-position": newPos,
            "data-normal": newNorm,
            "data-orbit": newOrb,
            "data-target": newTarg,
            "field-of-view": newFov
        }
        const newText = currentText.replace(/(.*?<mvconfig>)[\S\s]*?(<\/mvconfig>.*)/,`$1\n${TOML.stringify(mvconfig, null, 2)}\n$2`)
        $('#wpTextbox1').val(newText)
    }
    grabHotspot = null
}

/**
 * Change the currently selected annotation set
 * 
 * @param {string} newSet name of annotation set to select
 */
selectAnnotationSet = function(newSet) {
    $('model-viewer').attr('currentSet',newSet)
    readMvconfig()
}