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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
 
"use strict";
 
const RuntimeGlobals = require("../RuntimeGlobals");
const ExportWebpackRequireRuntimeModule = require("./ExportWebpackRequireRuntimeModule");
const ModuleChunkLoadingRuntimeModule = require("./ModuleChunkLoadingRuntimeModule");
 
/** @typedef {import("../Chunk")} Chunk */
/** @typedef {import("../Compiler")} Compiler */
/** @typedef {import("../Module").RuntimeRequirements} RuntimeRequirements */
 
const PLUGIN_NAME = "ModuleChunkLoadingPlugin";
 
class ModuleChunkLoadingPlugin {
    /**
     * Applies the plugin by registering its hooks on the compiler.
     * @param {Compiler} compiler the compiler instance
     * @returns {void}
     */
    apply(compiler) {
        compiler.hooks.thisCompilation.tap(PLUGIN_NAME, (compilation) => {
            const globalChunkLoading = compilation.outputOptions.chunkLoading;
            /**
             * Checks whether this module chunk loading plugin is enabled for chunk.
             * @param {Chunk} chunk chunk to check
             * @returns {boolean} true, when the plugin is enabled for the chunk
             */
            const isEnabledForChunk = (chunk) => {
                const options = chunk.getEntryOptions();
                const chunkLoading =
                    options && options.chunkLoading !== undefined
                        ? options.chunkLoading
                        : globalChunkLoading;
                return chunkLoading === "import";
            };
            /** @type {WeakSet<Chunk>} */
            const onceForChunkSet = new WeakSet();
            /**
             * Handles the hook callback for this code path.
             * @param {Chunk} chunk chunk to check
             * @param {RuntimeRequirements} set runtime requirements
             */
            const handler = (chunk, set) => {
                if (onceForChunkSet.has(chunk)) return;
                onceForChunkSet.add(chunk);
                if (!isEnabledForChunk(chunk)) return;
                set.add(RuntimeGlobals.moduleFactoriesAddOnly);
                set.add(RuntimeGlobals.hasOwnProperty);
                compilation.addRuntimeModule(
                    chunk,
                    new ModuleChunkLoadingRuntimeModule(set)
                );
            };
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.ensureChunkHandlers)
                .tap(PLUGIN_NAME, handler);
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.baseURI)
                .tap(PLUGIN_NAME, handler);
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.externalInstallChunk)
                .tap(PLUGIN_NAME, handler);
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.onChunksLoaded)
                .tap(PLUGIN_NAME, handler);
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.hmrDownloadUpdateHandlers)
                .tap(PLUGIN_NAME, handler);
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.hmrDownloadManifest)
                .tap(PLUGIN_NAME, handler);
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.externalInstallChunk)
                .tap(PLUGIN_NAME, (chunk) => {
                    if (!isEnabledForChunk(chunk)) return;
                    compilation.addRuntimeModule(
                        chunk,
                        new ExportWebpackRequireRuntimeModule()
                    );
                });
 
            // We need public path only when we prefetch/preload chunk or public path is not `auto`
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.prefetchChunkHandlers)
                .tap(PLUGIN_NAME, (chunk, set) => {
                    if (!isEnabledForChunk(chunk)) return;
                    set.add(RuntimeGlobals.publicPath);
                });
 
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.preloadChunkHandlers)
                .tap(PLUGIN_NAME, (chunk, set) => {
                    if (!isEnabledForChunk(chunk)) return;
                    set.add(RuntimeGlobals.publicPath);
                });
 
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.ensureChunkHandlers)
                .tap(PLUGIN_NAME, (chunk, set) => {
                    if (!isEnabledForChunk(chunk)) return;
 
                    if (compilation.outputOptions.publicPath !== "auto") {
                        set.add(RuntimeGlobals.publicPath);
                    }
 
                    set.add(RuntimeGlobals.getChunkScriptFilename);
                });
 
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.hmrDownloadUpdateHandlers)
                .tap(PLUGIN_NAME, (chunk, set) => {
                    if (!isEnabledForChunk(chunk)) return;
                    set.add(RuntimeGlobals.publicPath);
                    set.add(RuntimeGlobals.loadScript);
                    set.add(RuntimeGlobals.getChunkUpdateScriptFilename);
                    set.add(RuntimeGlobals.moduleCache);
                    set.add(RuntimeGlobals.hmrModuleData);
                    set.add(RuntimeGlobals.moduleFactoriesAddOnly);
                });
 
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.hmrDownloadManifest)
                .tap(PLUGIN_NAME, (chunk, set) => {
                    if (!isEnabledForChunk(chunk)) return;
                    set.add(RuntimeGlobals.publicPath);
                    set.add(RuntimeGlobals.getUpdateManifestFilename);
                });
 
            compilation.hooks.additionalTreeRuntimeRequirements.tap(
                PLUGIN_NAME,
                (chunk, set, { chunkGraph }) => {
                    if (chunkGraph.hasChunkEntryDependentChunks(chunk)) {
                        set.add(RuntimeGlobals.externalInstallChunk);
                    }
                }
            );
        });
    }
}
 
module.exports = ModuleChunkLoadingPlugin;