/**
 * la classe qui repère des patterns
 */
import exifr from 'exifr'
import moment from 'moment'
import log from 'loglevel'
import rangement_instance from '../conf/configs'
import * as fs from "fs";
import path from "node:path";
import minimist from 'minimist';
import {fileDestructuration, taggingCommand} from './interfaces';

log.setLevel(rangement_instance.log_level)


let cwd = path.dirname(process.cwd()) + '/' + path.basename(process.cwd())


/**
 * finds patterns for file name
 */
export default class finder {

	static statistics = {
		filesModified: 0,
		filesNotModified: 0,
	}
	private static moments: any[] = []
	private static otherRenames: any = [];
	private static fileList: any = [];
	private static expandedFileList: any = [];
	private static mini_arguments: any;


	static readSubdirectories(baseDir: string) {
		fs.readdir(baseDir, (err, filesList) => {
			if (err) throw err

			log.debug('readSubdirectories - files', filesList)

			filesList.forEach((subDirOrFile) => {
				const newFullPath = cwd + '/' + subDirOrFile

				if (fs.existsSync(newFullPath)) {
					const s = fs.statSync(newFullPath)

					if (s.isFile()) {
						this.expandedFileList.push(cwd + '/' + subDirOrFile)
					}
				}
			})

			return filesList;
		})
	}

	static isFolderOrFile(filePathName: string) {
		const stat = fs.statSync(filePathName)

		if (stat.isDirectory()) {
			this.fileList = this.readSubdirectories(filePathName)
			log.debug('fileList in directory ', filePathName, '\n', this.fileList)
			if (this.fileList.length) {
				this.expandedFileList.push(...this.fileList)
			}
		} else if (stat.isFile()) {
			this.expandedFileList.push(filePathName)
		}
	}


	/**
	 * guess file name on one file which is not a directory
	 * @param fullPath
	 */

	static guessFileNameOnOnefile(fullPath: string): void {

		log.info('go guess file name on file: ', fullPath)

		fs.stat(fullPath, (err, stats) => {

			if (err) {
				log.error('échec fichier', err)
				log.error('ce fichier n existe pas: ', fullPath)
				return
			} else {

				log.debug(' -------- le fichier existe bien, déstructuration')
				let structureForFile: fileDestructuration = this.destructurateFileName(fullPath)
				log.debug(' -------- ', fullPath)
				log.debug(' -------- ', structureForFile)

				// examiner les infos exif de chaque fichier pour proposer un nouveau nom
				if (!structureForFile.dateStampInFileNameOriginal) {
					log.info('    le nom de fichier "' + structureForFile.freeText + '" ne contient pas de date formatée au début')
				} else {
					log.debug(' -------- dateStampInFileNameOriginal: ', structureForFile.dateStampInFileNameOriginal)
				}

				log.debug(' -------- trouver les infos exif', structureForFile.fullPath)
				this.findExifCreationDate(structureForFile.fullPath)
					.then(data => {
							log.info(' ... chercher la date de création : "' + structureForFile.freeText + '"')
							let foundDate = this.findEarliestDateInExifData(data)
							let gpsData = this.findGpsCoordinates(data)
							if (gpsData) {
								structureForFile.tags.push('has-gps')
							}

							let isScreenshot = this.findScreenshot(structureForFile.fileNameOriginal)

							if (isScreenshot) {
								structureForFile.freeText.replace(`Capture d'écran`, '')
								structureForFile.freeText.replace(`Screenshot`, '')
								structureForFile.tags.push('screenshot')
							}


							log.info(' =>>>>>>> foundDate : ', foundDate)
							if (foundDate && (foundDate !== 'Invalid Date')) {
								structureForFile.dateStampExif = foundDate
							} else {
								log.info('pas de date trouvée dans le nom')
							}
							this.shouldWeChangeName(structureForFile)
						}
						,
						(error) => {
							log.warn('/////////// Error in reading exif of file: ' + error.message)
							return ''
						})


			}
		})
	}


	/**
	 * if there is no original file name free text into the new name, append it to the free text part
	 * @param originalFileName
	 * @param fileMixedNewName
	 */
	static addOriginalFileNameIfMissing(originalFileName: string, fileMixedNewName: string) {

		if (!fileMixedNewName.includes(originalFileName)) {
			let properties = finder.destructurateFileName(fileMixedNewName)
			return properties.freeText + ' ' + originalFileName
		} else {
			return fileMixedNewName
		}
	}

	static reportStatistics() {
		log.info('\n --------- statistics',
			this.statistics)
	}

	static renameFile(originalFileName: string, fileMixedNewName: string) {
		if (rangement_instance.keepOriginalNameInRename) {
			log.debug(' +++++++++ on ajoute le nom original dans le free text +++++++', originalFileName)
			fileMixedNewName = this.addOriginalFileNameIfMissing(originalFileName, fileMixedNewName)
			log.debug(' +++++++++ nouveau nom', fileMixedNewName)
		}

		let self = this;
		fs.rename(originalFileName, fileMixedNewName, function (err) {
			log.info(' ✅ name changed', fileMixedNewName)
			if (err) {
				log.info('rename ERROR: ' + err)
			} else {
				self.otherRenames.push(fileMixedNewName)

				finder.statistics['filesModified']++
			}
		})
	}

	static guessFileNameOnAllFilesFromArguments(): void {

		// parcourir les fichiers
		log.debug('_____________ liste des fichiers', this.mini_arguments._)
		let fileList = this.mini_arguments._

		// test file exists
		fileList.forEach((fullPath: string) => {
				log.debug('file list element: ', fullPath)
				// parcourir les dossiers
				this.isFolderOrFile(`${fullPath}`)
			}
		)

		log.info('expanded file list :', this.expandedFileList)
		this.expandedFileList.forEach((filePath: string) => {
			this.guessFileNameOnOnefile(filePath)
		})

		if (rangement_instance.reportStatistics || this.mini_arguments.stats) {
			finder.reportStatistics()
		}
	}


	static makeFileNameFromProperties(fileProperties: fileDestructuration) {

		let tagPlace = ''
		log.info('fileProperties.tags', fileProperties.tags)
		if (fileProperties.tags.length && rangement_instance.keepTags) {
			tagPlace = ' ' + rangement_instance.tagSectionSeparator + ' ' + fileProperties.tags.join(rangement_instance.tagSeparator)
		}
		log.debug('fileProperties.dateStampExif', fileProperties.dateStampExif)

		let newName = '';
		let timestampFormatted = fileProperties.dateStampExif;
		/**
		 * restauration de typologie de nom de fichier gopro pour faciliter les assemblages.
		 */
		if (this.mini_arguments['gopro-restore-name']) {
			this.mini_arguments['remove-timestamp'] = true;
			this.mini_arguments['remove-tags'] = true;
		}

		if (this.mini_arguments['remove-tags']) {
			tagPlace = '';
		}
		if (this.mini_arguments['remove-timestamp']) {
			timestampFormatted = '';
		}

		if (this.mini_arguments['remove-freetext']) {
			log.debug('override remove-freetext')
			rangement_instance.keepFreeText = false;
		}

		let extension = fileProperties.extension.trim();

		if (this.mini_arguments['remove-extension']) {
			extension = '';
		}

		let spacer = '';
		if (timestampFormatted && fileProperties.freeText && rangement_instance.keepFreeText) {
			spacer = ' '
		}

		/**
		 * assemblage du schéma de nom
		 */
		newName += timestampFormatted
			+ spacer
			+ (rangement_instance.keepFreeText ? fileProperties.freeText : '')
			+ tagPlace.trim()
			+ extension

		if (rangement_instance.replaceUnderscoreWithSpaces) {
			newName = newName.replace('_', ' ')
		}

		newName = finder.cleanSpaces(newName)

		return newName
	}

	static parseArguments() {
		this.mini_arguments = minimist(process.argv.slice(2))
		log.debug('arguments', this.mini_arguments)
		if (this.mini_arguments['lowerYear']) {
			log.info('année minimale à retenir pour la sélection des dates:', this.mini_arguments['lowerYear'])
		}
		if (this.mini_arguments['strictYear']) {
			log.info('année à retenir pour la sélection des dates:', this.mini_arguments['lowerYear'])
		}
		if (!this.mini_arguments._.length) {
			log.info('pas de fichier ou de dossier demandé, veuillez spécifier un chemin en argument')
		}
		console.log('this.mini_arguments', this.mini_arguments)
	}

	static shouldWeChangeName(structureForFile: fileDestructuration) {
		log.info(' ______ shouldWeChangeName ', structureForFile.fileNameOriginal)
		let newName = this.makeFileNameFromProperties(structureForFile)
		log.debug('newName', newName)
		if (this.otherRenames.includes(newName)) {
			log.debug('nouveau nom déjà présent dans les fichiers déjà renommés, on garde en état actuel')
			return;
		}
		if (structureForFile.fileNameOriginal !== newName) {

			log.info('\n ancien nom :', structureForFile.fileNameOriginal)

			log.info(' nouveau nom:', newName)
			if (!this.mini_arguments['dry-run']) {

				log.debug('___________ structureForFile.folderPath', structureForFile.folderPath)
				log.debug('___________ newName', newName)

				this.renameFile(structureForFile.fullPath,
					structureForFile.folderPath + newName)
			} else {
				log.info('no renaming for real, this is a dry run')
				finder.statistics['filesNotModified']++
			}
		} else {
			log.info(' rien à changer')
		}
	}

	static findScreenshot(inputString: string) {
		return inputString.match(/screenshot/i) || inputString.match(/capture d'écran/i)
	}

	static findFormattedDate(filepath: string) {
		let match = filepath.match(/\d{4}-\d{2}-\d{2}T\d{2}\.\d{2}\.\d{2}/ig)
		log.debug(' finder - match findFormattedDate', match)
		let result = ''
		if (match && match[0]) {
			result = match[0]
		}
		return result
	}

	static findFileExtension(inputString: string): string {
		let result = inputString.match(/\.\w{3,4}$/i)
		if (result && result.length) {
			return result[0]
		}
		return ''
	}

	/**
	 * find the section of file name which contains the free text to describe the picture
	 * @param fileName
	 * @returns {*|string}
	 */
	static findFileNameFreeTextPart(fileName: string) {
		fileName = fileName.replace(this.findFileExtension(fileName), '')
		let boom = fileName.split(rangement_instance.tagSectionSeparator)
		if (boom.length) {
			let freeTextPart = boom[0].trim()
			// remove date
			let foundDate = this.findFormattedDate(freeTextPart)
			if (foundDate) {
				freeTextPart = freeTextPart.replace(foundDate, '').trim()
			}
			log.debug(' finder - freeTextPart:', freeTextPart)
			return freeTextPart
		}
		return fileName.trim()
	}

	/**
	 * find an array of tags
	 * @param inputString
	 * @returns {[]}
	 */
	static findTagSectionInString(inputString: string) {
		let listOfTags: Array<string> = []
		// remove extension
		let extensionFile = finder.findFileExtension(inputString)

		if (extensionFile) {

			inputString = inputString.replace(extensionFile, '')
		} else {
			log.debug(' finder - no extensionFile', extensionFile, inputString)
			extensionFile = ''
		}
		inputString = inputString.replace(extensionFile, '')

		log.debug(' finder - extensionFile', extensionFile)
		if (inputString.includes(rangement_instance.tagSectionSeparator)) {
			log.debug(' finder - inputString', inputString)
			if (inputString.length) {

				let boom = inputString.split(rangement_instance.tagSectionSeparator)
				log.debug(' finder - boom', boom)
				if (boom.length) {
					listOfTags = [...boom[1].trim().split(rangement_instance.tagSeparator)]
					log.debug(' finder - listOfTags', listOfTags)
				} else {
					log.debug(' finder - no boom', boom)
				}
			}
		}
		return listOfTags
	}

	static removeTagInProperties(properties: fileDestructuration, tagName: string) {

		let foundTagNameIndex = properties.tags.indexOf(tagName)
		if (foundTagNameIndex) {
			delete properties.tags[foundTagNameIndex]
		}
		return properties
	}

	static cleanSpaces(inputString: string) {
		return inputString.replace(/  *g/, ' ').replace(/  /, ' ').trim()
	}

	static searchAndReplaceInFileName(searchString: string, replaceString: string, fileName: string): string {
		return this.cleanSpaces(fileName.replace(searchString, replaceString))
	}

	/**
	 * search screenshot clues and rename
	 */
	static searchAndRenameScreenshots(fileName: string) {
		if (finder.findScreenshot(fileName)) {
			let tags = this.findTagSectionInString(fileName)
			log.debug(' finder - tags', tags)
			if (!tags.includes('screenshot')) {

				fileName = this.addTagInFileName('screenshot', fileName)
				fileName = this.searchAndReplaceInFileName('Screenshot', '', fileName)
				log.debug(' finder - screenShotMockFileName:', fileName)
				return this.cleanSpaces(fileName)
			}
			log.debug(' finder - is a screenshot, remove screenshot in name, and add tag screenshot')
		} else {
			return null
		}
	}

	/**
	 * determines if we must add or remove new tags
	 * @param tagCommand
	 * @returns {{tagsToAdd: [], tagCommand: *, tagsToRemove: []}}
	 */
	static addOrRemoveTagsParsing(tagCommand: string): taggingCommand {
		let tagsToAdd: Array<any> = []
		let tagsToRemove: Array<any> = []

		// split all tags
		let listOfTags = tagCommand.split(' ')
		listOfTags.forEach(elem => {
			// remove when a minus is present*
			if (elem.indexOf('-')) {
				tagsToRemove.push(elem)
			} else {
				// add tag otherwise
				tagsToAdd.push(elem)
			}
		})

		return {tagCommand, tagsToAdd, tagsToRemove}
	}

	static applyTagChangesOnProperties(tagChange: any, properties: fileDestructuration) {
		// add new tags
		properties.tags = [...properties.tags, tagChange.tagsToAdd]
		properties.tags.forEach((elem, index) => {
			if (tagChange.tagsToRemove.includes(elem)) {
				delete properties.tags[index]
			}
		})
		properties.tags = [...new Set(properties.tags)];

		return properties
	}

	/**
	 * add a tag and gives new filename with extension
	 * @param tagName
	 * @param fileName
	 * @returns {*}
	 */
	static addTagInFileName(tagName: string, fileName: string) {

		let tags: any = this.findTagSectionInString(fileName)
		let firstPart = this.findFileNameFreeTextPart(fileName)

		tags.push(tagName)
		// @ts-ignore
		let uniqueArray = [...new Set(tags)]

		let newFileName = firstPart + ' ' + rangement_instance.tagSectionSeparator + ' ' + uniqueArray.join(rangement_instance.tagSeparator)
		newFileName = newFileName.replace(/ {*}/, '') + this.findFileExtension(fileName)
		return this.cleanSpaces(newFileName)
	}

	/**
	 * convertit un nom de fichier en une structure décrivant plusieurs parties correspondant au pattern d'archivage
	 * @param fullPath
	 * @returns {{extension: *, dateStamp: string, freeText: (*|string), tags: *[]}}
	 */
	static destructurateFileName(fullPath: string): fileDestructuration {
		let [folderPath, fileNameOriginal] = this.findFolderPath(fullPath)

		// if path is relative, add the current working directory as full path part
		if (/^\\(?!\\)/.test(fullPath)) {
			fullPath = cwd + '/' + fullPath
		}

		return {
			fullPath,
			folderPath,
			fileNameOriginal,
			dateStampInFileNameOriginal: this.findFormattedDate(fileNameOriginal),
			dateStampExif: '',
			freeText: this.findFileNameFreeTextPart(fileNameOriginal),
			tags: this.findTagSectionInString(fileNameOriginal),
			extension: this.findFileExtension(fileNameOriginal),
		} as fileDestructuration

	}

	static findGpsCoordinates(exifData: any) {
		let result = null;
		if (exifData && exifData.GPSDateTime) {
			result = exifData.GPSDateTime
		}
		return result
	}

	static dateIsGood(date: Date): boolean {
		if (!date) {
			return false
		}
		let year: number = date.getFullYear();
		console.log('date', typeof date, year)
		console.log('(year > 1970)', (year > 1970))


		let strictYearToFind = 1 * this.mini_arguments['strictYear']
		let lowerYearPossible = 1 * this.mini_arguments['lowerYear']
		if (!lowerYearPossible) {
			lowerYearPossible = 2004
		}
		let today: Date = new Date();
		let higherYearPossible = today.getFullYear()
		let isDateGood = (year === strictYearToFind) || ((year >= lowerYearPossible) && (year <= higherYearPossible))
		console.log('lowerYearPossible', lowerYearPossible)
		if (!isDateGood) {
			log.warn(' date is not good :', date)
		}
		return isDateGood
	}

	private static pushToMomentDatesIfGood(someDate: Date): void {
		if (this.dateIsGood(someDate)) {
			this.moments.push(someDate)
		}
	}

	/**
	 * finds the earliest part in several exif date info
	 * @param exifData
	 * @returns {string}
	 */
	static findEarliestDateInExifData(exifData: any) {
		log.debug(' finder - findEarliestDateInExifData')

		this.moments = []

		if (exifData) {

			let exifDates: string[] = ['DateTimeOriginal', 'FileModificationDateTime', 'FileModificationDate', 'ModificationDateTime', 'ModifyDate', 'FileAccessDateTime', 'DateTime', 'FileInodeChangeDateTime', 'CreateDate']
			exifDates.forEach((exifDateKind: string): void => {
				if (exifData[exifDateKind]) {
					log.debug(' finder exifDates - : ', exifDateKind, exifData[exifDateKind])
					this.pushToMomentDatesIfGood(exifData[exifDateKind])
				}
			})

			this.moments = this.moments.map(d => {
				let newdate = moment(d)
				return newdate
			})
			let minDate = moment.min(this.moments)

			log.info(' finder - dates moments:', this.moments)
			log.debug(' finder - minDate :::::::::', minDate)
			log.info(' finder - minDate :::::::::', minDate.format(rangement_instance.iso_date_format))

			return minDate.format(rangement_instance.iso_date_format)
		} else {
			log.debug(' finder - 😥 /!\\ pas de exif data')
			return ''
		}
	}


	static appendFileName(fileProperties: fileDestructuration, newText: string) {
		fileProperties.freeText = finder.cleanSpaces(fileProperties.freeText + ' ' + newText)
		return fileProperties
	}

	static prependFileName(fileProperties: fileDestructuration, newText: string) {
		fileProperties.freeText = finder.cleanSpaces(newText + ' ' + fileProperties.freeText)
		return fileProperties
	}

	/**
	 * examine plusieurs propriétés exif de date et retourne la plus ancienne
	 * @param filepath
	 */
	static async findExifCreationDate(filepath: string) {

		log.debug(' -------- findExifCreationDate')
		let dateAlreadyInFileName = finder.findFormattedDate(filepath)
		if (dateAlreadyInFileName) {
			log.debug(' finder - ------ dateAlreadyInFileName', dateAlreadyInFileName)
		} else {
			log.debug(' -------- pas de date présente')
		}

		let exifPromise = await exifr.parse(filepath);
		// log.debug(' -------- exifdata', exifPromise)

		return exifPromise

	}

	static findFolderPath(filePath: string) {
		let folders: any = filePath.split('/')
		let fileName: any = folders.pop()
		folders = filePath.replace(fileName, '')

		log.debug(' finder - \n - folders', folders)
		log.debug(' finder -  - fileName', fileName, '\n')
		return [folders, fileName]

	}

}