// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
// Copyright the Browserify authors. MIT License.
// Ported from https://github.com/browserify/path-browserify/
// This module is browser compatible.
import { CHAR_DOT, CHAR_FORWARD_SLASH } from "./_constants.ts";
import { _format, assertPath, encodeWhitespace, isPosixPathSeparator, normalizeString } from "./_util.ts";
export const sep = "/";
export const delimiter = ":";
// path.resolve([from ...], to)
/**
 * Resolves `pathSegments` into an absolute path.
 * @param pathSegments an array of path segments
 */ export function resolve(...pathSegments) {
    let resolvedPath = "";
    let resolvedAbsolute = false;
    for(let i = pathSegments.length - 1; i >= -1 && !resolvedAbsolute; i--){
        let path;
        if (i >= 0) path = pathSegments[i];
        else {
            // deno-lint-ignore no-explicit-any
            const { Deno  } = globalThis;
            if (typeof Deno?.cwd !== "function") {
                throw new TypeError("Resolved a relative path without a CWD.");
            }
            path = Deno.cwd();
        }
        assertPath(path);
        // Skip empty entries
        if (path.length === 0) {
            continue;
        }
        resolvedPath = `${path}/${resolvedPath}`;
        resolvedAbsolute = path.charCodeAt(0) === CHAR_FORWARD_SLASH;
    }
    // At this point the path should be resolved to a full absolute path, but
    // handle relative paths to be safe (might happen when process.cwd() fails)
    // Normalize the path
    resolvedPath = normalizeString(resolvedPath, !resolvedAbsolute, "/", isPosixPathSeparator);
    if (resolvedAbsolute) {
        if (resolvedPath.length > 0) return `/${resolvedPath}`;
        else return "/";
    } else if (resolvedPath.length > 0) return resolvedPath;
    else return ".";
}
/**
 * Normalize the `path`, resolving `'..'` and `'.'` segments.
 * @param path to be normalized
 */ export function normalize(path) {
    assertPath(path);
    if (path.length === 0) return ".";
    const isAbsolute = path.charCodeAt(0) === CHAR_FORWARD_SLASH;
    const trailingSeparator = path.charCodeAt(path.length - 1) === CHAR_FORWARD_SLASH;
    // Normalize the path
    path = normalizeString(path, !isAbsolute, "/", isPosixPathSeparator);
    if (path.length === 0 && !isAbsolute) path = ".";
    if (path.length > 0 && trailingSeparator) path += "/";
    if (isAbsolute) return `/${path}`;
    return path;
}
/**
 * Verifies whether provided path is absolute
 * @param path to be verified as absolute
 */ export function isAbsolute(path) {
    assertPath(path);
    return path.length > 0 && path.charCodeAt(0) === CHAR_FORWARD_SLASH;
}
/**
 * Join all given a sequence of `paths`,then normalizes the resulting path.
 * @param paths to be joined and normalized
 */ export function join(...paths) {
    if (paths.length === 0) return ".";
    let joined;
    for(let i = 0, len = paths.length; i < len; ++i){
        const path = paths[i];
        assertPath(path);
        if (path.length > 0) {
            if (!joined) joined = path;
            else joined += `/${path}`;
        }
    }
    if (!joined) return ".";
    return normalize(joined);
}
/**
 * Return the relative path from `from` to `to` based on current working directory.
 * @param from path in current working directory
 * @param to path in current working directory
 */ export function relative(from, to) {
    assertPath(from);
    assertPath(to);
    if (from === to) return "";
    from = resolve(from);
    to = resolve(to);
    if (from === to) return "";
    // Trim any leading backslashes
    let fromStart = 1;
    const fromEnd = from.length;
    for(; fromStart < fromEnd; ++fromStart){
        if (from.charCodeAt(fromStart) !== CHAR_FORWARD_SLASH) break;
    }
    const fromLen = fromEnd - fromStart;
    // Trim any leading backslashes
    let toStart = 1;
    const toEnd = to.length;
    for(; toStart < toEnd; ++toStart){
        if (to.charCodeAt(toStart) !== CHAR_FORWARD_SLASH) break;
    }
    const toLen = toEnd - toStart;
    // Compare paths to find the longest common path from root
    const length = fromLen < toLen ? fromLen : toLen;
    let lastCommonSep = -1;
    let i = 0;
    for(; i <= length; ++i){
        if (i === length) {
            if (toLen > length) {
                if (to.charCodeAt(toStart + i) === CHAR_FORWARD_SLASH) {
                    // We get here if `from` is the exact base path for `to`.
                    // For example: from='/foo/bar'; to='/foo/bar/baz'
                    return to.slice(toStart + i + 1);
                } else if (i === 0) {
                    // We get here if `from` is the root
                    // For example: from='/'; to='/foo'
                    return to.slice(toStart + i);
                }
            } else if (fromLen > length) {
                if (from.charCodeAt(fromStart + i) === CHAR_FORWARD_SLASH) {
                    // We get here if `to` is the exact base path for `from`.
                    // For example: from='/foo/bar/baz'; to='/foo/bar'
                    lastCommonSep = i;
                } else if (i === 0) {
                    // We get here if `to` is the root.
                    // For example: from='/foo'; to='/'
                    lastCommonSep = 0;
                }
            }
            break;
        }
        const fromCode = from.charCodeAt(fromStart + i);
        const toCode = to.charCodeAt(toStart + i);
        if (fromCode !== toCode) break;
        else if (fromCode === CHAR_FORWARD_SLASH) lastCommonSep = i;
    }
    let out = "";
    // Generate the relative path based on the path difference between `to`
    // and `from`
    for(i = fromStart + lastCommonSep + 1; i <= fromEnd; ++i){
        if (i === fromEnd || from.charCodeAt(i) === CHAR_FORWARD_SLASH) {
            if (out.length === 0) out += "..";
            else out += "/..";
        }
    }
    // Lastly, append the rest of the destination (`to`) path that comes after
    // the common path parts
    if (out.length > 0) return out + to.slice(toStart + lastCommonSep);
    else {
        toStart += lastCommonSep;
        if (to.charCodeAt(toStart) === CHAR_FORWARD_SLASH) ++toStart;
        return to.slice(toStart);
    }
}
/**
 * Resolves path to a namespace path
 * @param path to resolve to namespace
 */ export function toNamespacedPath(path) {
    // Non-op on posix systems
    return path;
}
/**
 * Return the directory path of a `path`.
 * @param path to determine the directory path for
 */ export function dirname(path) {
    assertPath(path);
    if (path.length === 0) return ".";
    const hasRoot = path.charCodeAt(0) === CHAR_FORWARD_SLASH;
    let end = -1;
    let matchedSlash = true;
    for(let i = path.length - 1; i >= 1; --i){
        if (path.charCodeAt(i) === CHAR_FORWARD_SLASH) {
            if (!matchedSlash) {
                end = i;
                break;
            }
        } else {
            // We saw the first non-path separator
            matchedSlash = false;
        }
    }
    if (end === -1) return hasRoot ? "/" : ".";
    if (hasRoot && end === 1) return "//";
    return path.slice(0, end);
}
/**
 * Return the last portion of a `path`. Trailing directory separators are ignored.
 * @param path to process
 * @param ext of path directory
 */ export function basename(path, ext = "") {
    if (ext !== undefined && typeof ext !== "string") {
        throw new TypeError('"ext" argument must be a string');
    }
    assertPath(path);
    let start = 0;
    let end = -1;
    let matchedSlash = true;
    let i;
    if (ext !== undefined && ext.length > 0 && ext.length <= path.length) {
        if (ext.length === path.length && ext === path) return "";
        let extIdx = ext.length - 1;
        let firstNonSlashEnd = -1;
        for(i = path.length - 1; i >= 0; --i){
            const code = path.charCodeAt(i);
            if (code === CHAR_FORWARD_SLASH) {
                // If we reached a path separator that was not part of a set of path
                // separators at the end of the string, stop now
                if (!matchedSlash) {
                    start = i + 1;
                    break;
                }
            } else {
                if (firstNonSlashEnd === -1) {
                    // We saw the first non-path separator, remember this index in case
                    // we need it if the extension ends up not matching
                    matchedSlash = false;
                    firstNonSlashEnd = i + 1;
                }
                if (extIdx >= 0) {
                    // Try to match the explicit extension
                    if (code === ext.charCodeAt(extIdx)) {
                        if (--extIdx === -1) {
                            // We matched the extension, so mark this as the end of our path
                            // component
                            end = i;
                        }
                    } else {
                        // Extension does not match, so our result is the entire path
                        // component
                        extIdx = -1;
                        end = firstNonSlashEnd;
                    }
                }
            }
        }
        if (start === end) end = firstNonSlashEnd;
        else if (end === -1) end = path.length;
        return path.slice(start, end);
    } else {
        for(i = path.length - 1; i >= 0; --i){
            if (path.charCodeAt(i) === CHAR_FORWARD_SLASH) {
                // If we reached a path separator that was not part of a set of path
                // separators at the end of the string, stop now
                if (!matchedSlash) {
                    start = i + 1;
                    break;
                }
            } else if (end === -1) {
                // We saw the first non-path separator, mark this as the end of our
                // path component
                matchedSlash = false;
                end = i + 1;
            }
        }
        if (end === -1) return "";
        return path.slice(start, end);
    }
}
/**
 * Return the extension of the `path` with leading period.
 * @param path with extension
 * @returns extension (ex. for `file.ts` returns `.ts`)
 */ export function extname(path) {
    assertPath(path);
    let startDot = -1;
    let startPart = 0;
    let end = -1;
    let matchedSlash = true;
    // Track the state of characters (if any) we see before our first dot and
    // after any path separator we find
    let preDotState = 0;
    for(let i = path.length - 1; i >= 0; --i){
        const code = path.charCodeAt(i);
        if (code === CHAR_FORWARD_SLASH) {
            // If we reached a path separator that was not part of a set of path
            // separators at the end of the string, stop now
            if (!matchedSlash) {
                startPart = i + 1;
                break;
            }
            continue;
        }
        if (end === -1) {
            // We saw the first non-path separator, mark this as the end of our
            // extension
            matchedSlash = false;
            end = i + 1;
        }
        if (code === CHAR_DOT) {
            // If this is our first dot, mark it as the start of our extension
            if (startDot === -1) startDot = i;
            else if (preDotState !== 1) preDotState = 1;
        } else if (startDot !== -1) {
            // We saw a non-dot and non-path separator before our dot, so we should
            // have a good chance at having a non-empty extension
            preDotState = -1;
        }
    }
    if (startDot === -1 || end === -1 || // We saw a non-dot character immediately before the dot
    preDotState === 0 || // The (right-most) trimmed path component is exactly '..'
    preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
        return "";
    }
    return path.slice(startDot, end);
}
/**
 * Generate a path from `FormatInputPathObject` object.
 * @param pathObject with path
 */ export function format(pathObject) {
    if (pathObject === null || typeof pathObject !== "object") {
        throw new TypeError(`The "pathObject" argument must be of type Object. Received type ${typeof pathObject}`);
    }
    return _format("/", pathObject);
}
/**
 * Return a `ParsedPath` object of the `path`.
 * @param path to process
 */ export function parse(path) {
    assertPath(path);
    const ret = {
        root: "",
        dir: "",
        base: "",
        ext: "",
        name: ""
    };
    if (path.length === 0) return ret;
    const isAbsolute = path.charCodeAt(0) === CHAR_FORWARD_SLASH;
    let start;
    if (isAbsolute) {
        ret.root = "/";
        start = 1;
    } else {
        start = 0;
    }
    let startDot = -1;
    let startPart = 0;
    let end = -1;
    let matchedSlash = true;
    let i = path.length - 1;
    // Track the state of characters (if any) we see before our first dot and
    // after any path separator we find
    let preDotState = 0;
    // Get non-dir info
    for(; i >= start; --i){
        const code = path.charCodeAt(i);
        if (code === CHAR_FORWARD_SLASH) {
            // If we reached a path separator that was not part of a set of path
            // separators at the end of the string, stop now
            if (!matchedSlash) {
                startPart = i + 1;
                break;
            }
            continue;
        }
        if (end === -1) {
            // We saw the first non-path separator, mark this as the end of our
            // extension
            matchedSlash = false;
            end = i + 1;
        }
        if (code === CHAR_DOT) {
            // If this is our first dot, mark it as the start of our extension
            if (startDot === -1) startDot = i;
            else if (preDotState !== 1) preDotState = 1;
        } else if (startDot !== -1) {
            // We saw a non-dot and non-path separator before our dot, so we should
            // have a good chance at having a non-empty extension
            preDotState = -1;
        }
    }
    if (startDot === -1 || end === -1 || // We saw a non-dot character immediately before the dot
    preDotState === 0 || // The (right-most) trimmed path component is exactly '..'
    preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
        if (end !== -1) {
            if (startPart === 0 && isAbsolute) {
                ret.base = ret.name = path.slice(1, end);
            } else {
                ret.base = ret.name = path.slice(startPart, end);
            }
        }
    } else {
        if (startPart === 0 && isAbsolute) {
            ret.name = path.slice(1, startDot);
            ret.base = path.slice(1, end);
        } else {
            ret.name = path.slice(startPart, startDot);
            ret.base = path.slice(startPart, end);
        }
        ret.ext = path.slice(startDot, end);
    }
    if (startPart > 0) ret.dir = path.slice(0, startPart - 1);
    else if (isAbsolute) ret.dir = "/";
    return ret;
}
/**
 * Converts a file URL to a path string.
 *
 * ```ts
 *      import { fromFileUrl } from "https://deno.land/std@$STD_VERSION/path/posix.ts";
 *      fromFileUrl("file:///home/foo"); // "/home/foo"
 * ```
 * @param url of a file URL
 */ export function fromFileUrl(url) {
    url = url instanceof URL ? url : new URL(url);
    if (url.protocol != "file:") {
        throw new TypeError("Must be a file URL.");
    }
    return decodeURIComponent(url.pathname.replace(/%(?![0-9A-Fa-f]{2})/g, "%25"));
}
/**
 * Converts a path string to a file URL.
 *
 * ```ts
 *      import { toFileUrl } from "https://deno.land/std@$STD_VERSION/path/posix.ts";
 *      toFileUrl("/home/foo"); // new URL("file:///home/foo")
 * ```
 * @param path to convert to file URL
 */ export function toFileUrl(path) {
    if (!isAbsolute(path)) {
        throw new TypeError("Must be an absolute path.");
    }
    const url = new URL("file:///");
    url.pathname = encodeWhitespace(path.replace(/%/g, "%25").replace(/\\/g, "%5C"));
    return url;
}
//# sourceMappingURL=data:application/json;base64,[encoded data, 32432 characters]