export function findDockerFile(dockerfilepath: string): string {
    if (dockerfilepath.indexOf('*') >= 0 || dockerfilepath.indexOf('?') >= 0) {
        tl.debug(tl.loc('ContainerPatternFound'));
        var buildFolder = tl.cwd();
        var allFiles = tl.find(buildFolder);
        var matchingResultsFiles = tl.match(allFiles, dockerfilepath, buildFolder, { matchBase: true });

        if (!matchingResultsFiles || matchingResultsFiles.length == 0) {
            throw new Error(tl.loc('ContainerDockerFileNotFound', dockerfilepath));
        }

        return matchingResultsFiles[0];
    }
    else {
        tl.debug(tl.loc('ContainerPatternNotFound'));
        return dockerfilepath;
    }
}

export function resolvePath(path : string): string {
    if (path.indexOf('*') >= 0 || path.indexOf('?') >= 0) {
        tl.debug(tl.loc('PatternFoundInPath', path));
        var rootFolder = tl.getVariable('System.DefaultWorkingDirectory');
        var allPaths = tl.find(rootFolder);
        var matchingResultsFiles = tl.match(allPaths, path, rootFolder, { matchBase: true });

        if (!matchingResultsFiles || matchingResultsFiles.length == 0) {
            throw new Error(tl.loc('CantResolvePatternInPath', path));
        }

        return matchingResultsFiles[0];
    }
    else
    {
        tl.debug(tl.loc('PatternNotFoundInFilePath', path));
        return path;
    }
}

export function findDockerFile(dockerfilepath : string) : string {
    if (dockerfilepath.indexOf('*') >= 0 || dockerfilepath.indexOf('?') >= 0) {
        tl.debug(tl.loc('ContainerPatternFound'));
        let workingDirectory = tl.getVariable('System.DefaultWorkingDirectory');
        let allFiles = tl.find(workingDirectory);
        let matchingResultsFiles = tl.match(allFiles, dockerfilepath, workingDirectory, { matchBase: true });

        if (!matchingResultsFiles || matchingResultsFiles.length == 0) {
            throw new Error(tl.loc('ContainerDockerFileNotFound', dockerfilepath));
        }

        return matchingResultsFiles[0];
    }
    else
    {
        tl.debug(tl.loc('ContainerPatternNotFound'));
        return dockerfilepath;
    }
}

export function resolveWildcardPath(pattern: string, allowEmptyWildcardMatch?: boolean): string[] {
    let isWindows = os.platform() === "win32";

    // Resolve files for the specified value or pattern
    let filesList: string[];

    // empty patterns match nothing (otherwise they will effectively match the current directory)
    if (!pattern) {
        filesList = [];
    }
    else if (pattern.indexOf("*") === -1 && pattern.indexOf("?") === -1) {

        // No pattern found, check literal path to a single file
        tl.checkPath(pattern, "files");

        // Use the specified single file
        filesList = [pattern];

    } else {
        let firstWildcardIndex = function (str) {
            let idx = str.indexOf("*");

            let idxOfWildcard = str.indexOf("?");
            if (idxOfWildcard > -1) {
                return (idx > -1) ?
                    Math.min(idx, idxOfWildcard) : idxOfWildcard;
            }

            return idx;
        };

        // Find app files matching the specified pattern
        tl.debug("Matching glob pattern: " + pattern);

        // First find the most complete path without any matching patterns
        let idx = firstWildcardIndex(pattern);
        tl.debug("Index of first wildcard: " + idx);
        let findPathRoot = path.dirname(pattern.slice(0, idx));

        tl.debug("find root dir: " + findPathRoot);

        // Now we get a list of all files under this root
        let allFiles = tl.find(findPathRoot);

        // Now matching the pattern against all files
        // Turn off a bunch of minimatch features to replicate the behavior of Find-Files in the old PowerShell tasks
        let patternFilter = tl.filter(
            pattern, {
                matchBase: true,
                nobrace: true,
                noext: true,
                nocomment: true,
                nonegate: true,
                nocase: isWindows,
                dot: isWindows,
            });

        filesList = allFiles.filter(patternFilter);

        // Avoid matching anything other than files
        filesList = filesList.filter(x => tl.stats(x).isFile());

        // Fail if no matching .sln files were found
        if (!allowEmptyWildcardMatch && (!filesList || filesList.length === 0)) {
            throw new Error("No matching files were found with search pattern: " + pattern);
        }
    }

    if (!isWindows) {
        return filesList;
    }
    else {
        return filesList.map(file => file.split("/").join("\\"));
    }
}

function findHelm(rootFolder: string) {
    var helmPath = path.join(rootFolder, "*", helmToolName + getExecutableExtention());
    var allPaths = tl.find(rootFolder);
    var matchingResultsFiles = tl.match(allPaths, helmPath, rootFolder);
    return matchingResultsFiles[0];
}

export function resolveWildcardPath(
    pattern: string,
    allowEmptyWildcardMatch?: boolean,
    includeFolders?: boolean): string[] {
    const isWindows = tl.osType() === "Windows_NT";

    // Resolve files for the specified value or pattern
    let filesList: string[];

    // empty patterns match nothing (otherwise they will effectively match the current directory)
    if (!pattern) {
        filesList = [];
    }
    else if (pattern.indexOf("*") === -1 && pattern.indexOf("?") === -1) {

        // No pattern found, check literal path to a single file
        tl.checkPath(pattern, "files");

        // Use the specified single file
        filesList = [pattern];

    } else {
        const firstWildcardIndex = function (str) {
            const idx = str.indexOf("*");

            const idxOfWildcard = str.indexOf("?");
            if (idxOfWildcard > -1) {
                return (idx > -1) ?
                    Math.min(idx, idxOfWildcard) : idxOfWildcard;
            }

            return idx;
        };

        // Find app files matching the specified pattern
        tl.debug("Matching glob pattern: " + pattern);

        // First find the most complete path without any matching patterns
        const idx = firstWildcardIndex(pattern);
        tl.debug("Index of first wildcard: " + idx);

        // include the wildcard character because:
        //  dirname(c:\foo\bar\) => c:\foo (which will make find() return a bunch of stuff we know we'll discard)
        //  dirname(c:\foo\bar\*) => c:\foo\bar
        const findPathRoot = path.dirname(pattern.slice(0, idx + 1));

        tl.debug("find root dir: " + findPathRoot);

        // Now we get a list of all files under this root
        const allFiles = tl.find(findPathRoot);

        // Now matching the pattern against all files
        // Turn off a bunch of minimatch features to replicate the behavior of Find-Files in the old PowerShell tasks
        const patternFilter = tl.filter(
            pattern, {
                matchBase: true,
                nobrace: true,
                noext: true,
                nocomment: true,
                nonegate: true,
                nocase: isWindows,
                dot: isWindows,
            });

        filesList = allFiles.filter(patternFilter);

        // Avoid matching anything other than files
        if (!includeFolders) {
            filesList = filesList.filter((x) => tl.stats(x).isFile());
        } else {
            filesList = filesList.filter((x) => tl.stats(x).isFile() || tl.stats(x).isDirectory());
        }

        // Fail if no matching .sln files were found
        if (!allowEmptyWildcardMatch && (!filesList || filesList.length === 0)) {
            throw new Error(tl.loc("Error_NoMatchingFilesFoundForPattern", pattern));
        }
    }

    if (!isWindows) {
        return filesList;
    }
    else {
        return filesList.map((file) => file.split("/").join("\\"));
    }
}

// This method will find the list of matching files for the specified contents
// This logic is the same as the one used by CopyFiles task except for allowing dot folders to be copied
// This will be useful to put in the task-lib
function getFilesToCopy(sourceFolder: string, contents: string[]): string[] {
    // include filter
    const includeContents: string[] = [];
    // exclude filter
    const excludeContents: string[] = [];

    // evaluate leading negations `!` on the pattern
    for (const pattern of contents.map(x => x.trim())) {
        let negate: boolean = false;
        let numberOfNegations: number = 0;
        for (const c of pattern) {
            if (c === '!') {
                negate = !negate;
                numberOfNegations++;
            } else {
                break;
            }
        }

        if (negate) {
            tl.debug('exclude content pattern: ' + pattern);
            const realPattern = pattern.substring(0, numberOfNegations) + path.join(sourceFolder, pattern.substring(numberOfNegations));
            excludeContents.push(realPattern);
        } else {
            tl.debug('include content pattern: ' + pattern);
            const realPattern = path.join(sourceFolder, pattern);
            includeContents.push(realPattern);
        }
    }

    // enumerate all files
    let files: string[] = [];
    const allPaths: string[] = tl.find(sourceFolder);
    const allFiles: string[] = [];

    // remove folder path
    for (const p of allPaths) {
        if (!tl.stats(p).isDirectory()) {
            allFiles.push(p);
        }
    }

    // if we only have exclude filters, we need add a include all filter, so we can have something to exclude.
    if (includeContents.length === 0 && excludeContents.length > 0) {
        includeContents.push('**');
    }

    tl.debug("counted " + allFiles.length + " files in the source tree");

    // a map to eliminate duplicates
    const pathsSeen = {};

    // minimatch options
    const matchOptions: tl.MatchOptions = { matchBase: true, dot: true };
    if (os.platform() === 'win32') {
        matchOptions.nocase = true;
    }

    // apply include filter
    for (const pattern of includeContents) {
        tl.debug('Include matching ' + pattern);

        // let minimatch do the actual filtering
        const matches: string[] = tl.match(allFiles, pattern, matchOptions);

        tl.debug('Include matched ' + matches.length + ' files');
        for (const matchPath of matches) {
            if (!pathsSeen.hasOwnProperty(matchPath)) {
                pathsSeen[matchPath] = true;
                files.push(matchPath);
            }
        }
    }

    // apply exclude filter
    for (const pattern of excludeContents) {
        tl.debug('Exclude matching ' + pattern);

        // let minimatch do the actual filtering
        const matches: string[] = tl.match(files, pattern, matchOptions);

        tl.debug('Exclude matched ' + matches.length + ' files');
        files = [];
        for (const matchPath of matches) {
            files.push(matchPath);
        }
    }

    return files;
}

export function resolveWildcardPath(pattern: string, allowEmptyWildcardMatch?: boolean): string[] {
    // Resolve files for the specified value or pattern
    var filesList: string[];
    if (pattern.indexOf('*') == -1 && pattern.indexOf('?') == -1) {
        // No pattern found, check literal path to a single file
        tl.checkPath(pattern, 'files');

        // Use the specified single file
        filesList = [pattern];

    } else {
        var firstWildcardIndex = function (str) {
            var idx = str.indexOf('*');

            var idxOfWildcard = str.indexOf('?');
            if (idxOfWildcard > -1) {
                return (idx > -1) ?
                    Math.min(idx, idxOfWildcard) : idxOfWildcard;
            }

            return idx;
        }

        // Find app files matching the specified pattern
        tl.debug('Matching glob pattern: ' + pattern);

        // First find the most complete path without any matching patterns
        var idx = firstWildcardIndex(pattern);
        tl.debug('Index of first wildcard: ' + idx);
        var findPathRoot = path.dirname(pattern.slice(0, idx));

        tl.debug('find root dir: ' + findPathRoot);

        // Now we get a list of all files under this root
        var allFiles = tl.find(findPathRoot);

        let isWindows = os.platform() === 'win32';
        let toPosixPath: (string) => string = _ => _;
        if (isWindows) {
            // minimatch assumes paths use /, so on Windows, make paths use /
            // This needs to be done both to the pattern and to the filenames.
            toPosixPath = (path: string) => path.replace("\\", "/");
        }

        // Now matching the pattern against all files
        // Turn off a bunch of minimatch features to replicate the be
        let patternFilter = tl.filter(
            toPosixPath(pattern), {
                matchBase: true,
                nobrace: true,
                noext: true,
                nocomment: true,
                nonegate: true,
                nocase: isWindows,
                dot: isWindows
            });

        filesList = allFiles.filter((file, index, array) => patternFilter(toPosixPath(file), index, array));

        // Fail if no matching .sln files were found
        if (!allowEmptyWildcardMatch && (!filesList || filesList.length == 0)) {
            throw new Error('No matching files were found with search pattern: ' + pattern);
        }
    }

    return filesList;
}

export function resolveWildcardPath(pattern: string, allowEmptyWildcardMatch?: boolean): string[] {
    let isWindows = os.platform() === 'win32';

    // Resolve files for the specified value or pattern
    var filesList: string[];
    if (pattern.indexOf('*') == -1 && pattern.indexOf('?') == -1) {
        
        // No pattern found, check literal path to a single file
        tl.checkPath(pattern, 'files');

        // Use the specified single file
        filesList = [pattern];

    } else {
        var firstWildcardIndex = function (str) {
            var idx = str.indexOf('*');

            var idxOfWildcard = str.indexOf('?');
            if (idxOfWildcard > -1) {
                return (idx > -1) ?
                    Math.min(idx, idxOfWildcard) : idxOfWildcard;
            }

            return idx;
        }

        // Find app files matching the specified pattern
        tl.debug('Matching glob pattern: ' + pattern);

        // First find the most complete path without any matching patterns
        var idx = firstWildcardIndex(pattern);
        tl.debug('Index of first wildcard: ' + idx);
        var findPathRoot = path.dirname(pattern.slice(0, idx));

        tl.debug('find root dir: ' + findPathRoot);

        // Now we get a list of all files under this root
        var allFiles = tl.find(findPathRoot);

        // Now matching the pattern against all files
        // Turn off a bunch of minimatch features to replicate the behavior of Find-Files in the old PowerShell tasks
        let patternFilter = tl.filter(
            pattern, {
                matchBase: true,
                nobrace: true,
                noext: true,
                nocomment: true,
                nonegate: true,
                nocase: isWindows,
                dot: isWindows
            });

        filesList = allFiles.filter(patternFilter);

        // Fail if no matching .sln files were found
        if (!allowEmptyWildcardMatch && (!filesList || filesList.length == 0)) {
            throw new Error('No matching files were found with search pattern: ' + pattern);
        }
    }

    if (!isWindows)
    {
        return filesList;
    }
    else
    {
        return filesList.map(file => file.split("/").join("\\"));
    }
}