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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
"use strict";
const forEachBail = require("./forEachBail");
const getPaths = require("./getPaths");
/** @typedef {import("./Resolver")} Resolver */
/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
module.exports = class ModulesInHierarchicalDirectoriesPlugin {
    /**
     * @param {string | ResolveStepHook} source source
     * @param {string | Array<string>} directories directories
     * @param {string | ResolveStepHook} target target
     */
    constructor(source, directories, target) {
        this.source = source;
        this.directories = /** @type {Array<string>} */ ([]).concat(directories);
        this.target = target;
    }
    /**
     * @param {Resolver} resolver the resolver
     * @returns {void}
     */
    apply(resolver) {
        const target = resolver.ensureHook(this.target);
        resolver
            .getHook(this.source)
            .tapAsync(
                "ModulesInHierarchicalDirectoriesPlugin",
                (request, resolveContext, callback) => {
                    const fs = resolver.fileSystem;
                    const addrs = getPaths(request.path)
                        .paths.map(p => {
                            return this.directories.map(d => resolver.join(p, d));
                        })
                        .reduce((array, p) => {
                            array.push.apply(array, p);
                            return array;
                        }, []);
                    forEachBail(
                        addrs,
                        (addr, callback) => {
                            fs.stat(addr, (err, stat) => {
                                if (!err && stat && stat.isDirectory()) {
                                    const obj = {
                                        ...request,
                                        path: addr,
                                        request: "./" + request.request,
                                        module: false
                                    };
                                    const message = "looking for modules in " + addr;
                                    return resolver.doResolve(
                                        target,
                                        obj,
                                        message,
                                        resolveContext,
                                        callback
                                    );
                                }
                                if (resolveContext.log)
                                    resolveContext.log(
                                        addr + " doesn't exist or is not a directory"
                                    );
                                if (resolveContext.missingDependencies)
                                    resolveContext.missingDependencies.add(addr);
                                return callback();
                            });
                        },
                        callback
                    );
                }
            );
    }
};
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