/**
 * 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 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 = 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)
                }
            let fetchplace = cwd+'/'+structureForFile.fullPath
                log.debug(' -------- trouver les infos exif', fetchplace)
                this.findExifCreationDate(fetchplace)
                    .then(data => {
                            log.info(' ... chercher la date de création : "' + structureForFile.freeText + '"')
                            log.debug('data', data)
                            let foundDate = this.findEarliestDateInExifData(data)

                            log.info(' =>>>>>>> foundDate : ', foundDate)
                            if (foundDate) {
                                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) {
            fileMixedNewName = this.addOriginalFileNameIfMissing(originalFileName, 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 = ''
            + fileProperties.dateStampExif
            + ' '
            + (rangement_instance.keepFreeText ? fileProperties.freeText : '')
            + tagPlace
            + fileProperties.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._.length) {
            log.info('pas de fichier ou de dossier demandé, veuillez spécifier un chemin en argument')
        }
    }

    static shouldWeChangeName(structureForFile: fileDestructuration) {
        log.info(' ______ shouldWeChangeName ', structureForFile.fileNameOriginal)
        let newName = this.makeFileNameFromProperties(structureForFile)
        log.debug('newName', newName)
        if (structureForFile.fileNameOriginal !== newName && !this.otherRenames.includes(newName)) {

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

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

                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.trim().replace(/  *g/, ' ').replace(/  /, ' ')
    }

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

    }

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

            let moments = []

            log.debug(' finder - exif data : ', exifData) // Do something with your data!
            if (exifData.DateTimeOriginal) {
                log.debug(' finder - image créée le : DateTimeOriginal : ', exifData.DateTimeOriginal) // Do something with your data!
                moments.push(exifData.DateTimeOriginal)
            }
            if (exifData.ModificationDateTime) {
                log.debug(' finder - image créée le : ModificationDateTime : ', exifData.ModificationDateTime) // Do something with your data!
                moments.push(exifData.ModificationDateTime)
            }
            if (exifData.ModifyDate) {
                log.debug(' finder - image créée le : ModifyDate : ', exifData.ModifyDate) // Do something with your data!
                moments.push(exifData.ModifyDate)
            }
            if (exifData.FileAccessDateTime) {
                moments.push(exifData.FileAccessDateTime)
            }
            if (exifData.FileInodeChangeDateTime) {
                moments.push(exifData.FileInodeChangeDateTime)
            }
            if (exifData.FileModificationDateTime) {
                log.debug(' finder - image créée le : FileModificationDateTime : ', exifData.FileModificationDateTime) // Do something with your data!
                moments.push(exifData.FileModificationDateTime)
            }
            if (exifData.CreateDate) {
                log.debug(' finder - image créée le : CreateDate : ', exifData.CreateDate) // Do something with your data!
                moments.push(exifData.CreateDate)
            }

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

    }
}