/*
  MIT License http://www.opensource.org/licenses/mit-license.php
  Author Tobias Koppers @sokra
*/ import CssSyntaxError from './CssSyntaxError';
import Warning from '../../postcss-loader/src/Warning';
import { stringifyRequest } from '../../../stringify-request';
const moduleRegExp = /\.module\.\w+$/i;
function getModulesOptions(rawOptions, loaderContext) {
    const { resourcePath } = loaderContext;
    if (typeof rawOptions.modules === 'undefined') {
        const isModules = moduleRegExp.test(resourcePath);
        if (!isModules) {
            return false;
        }
    } else if (typeof rawOptions.modules === 'boolean' && rawOptions.modules === false) {
        return false;
    }
    let modulesOptions = {
        compileType: rawOptions.icss ? 'icss' : 'module',
        auto: true,
        mode: 'local',
        exportGlobals: false,
        localIdentName: '[hash:base64]',
        localIdentContext: loaderContext.rootContext,
        localIdentHashPrefix: '',
        // eslint-disable-next-line no-undefined
        localIdentRegExp: undefined,
        namedExport: false,
        exportLocalsConvention: 'asIs',
        exportOnlyLocals: false
    };
    if (typeof rawOptions.modules === 'boolean' || typeof rawOptions.modules === 'string') {
        modulesOptions.mode = typeof rawOptions.modules === 'string' ? rawOptions.modules : 'local';
    } else {
        if (rawOptions.modules) {
            if (typeof rawOptions.modules.auto === 'boolean') {
                const isModules = rawOptions.modules.auto && moduleRegExp.test(resourcePath);
                if (!isModules) {
                    return false;
                }
            } else if (rawOptions.modules.auto instanceof RegExp) {
                const isModules = rawOptions.modules.auto.test(resourcePath);
                if (!isModules) {
                    return false;
                }
            } else if (typeof rawOptions.modules.auto === 'function') {
                const isModule = rawOptions.modules.auto(resourcePath);
                if (!isModule) {
                    return false;
                }
            }
            if (rawOptions.modules.namedExport === true && typeof rawOptions.modules.exportLocalsConvention === 'undefined') {
                modulesOptions.exportLocalsConvention = 'camelCaseOnly';
            }
        }
        modulesOptions = {
            ...modulesOptions,
            ...rawOptions.modules || {}
        };
    }
    if (typeof modulesOptions.mode === 'function') {
        modulesOptions.mode = modulesOptions.mode(loaderContext.resourcePath);
    }
    if (modulesOptions.namedExport === true) {
        if (rawOptions.esModule === false) {
            throw Object.defineProperty(new Error('The "modules.namedExport" option requires the "esModules" option to be enabled'), "__NEXT_ERROR_CODE", {
                value: "E103",
                enumerable: false
            });
        }
        if (modulesOptions.exportLocalsConvention !== 'camelCaseOnly') {
            throw Object.defineProperty(new Error('The "modules.namedExport" option requires the "modules.exportLocalsConvention" option to be "camelCaseOnly"'), "__NEXT_ERROR_CODE", {
                value: "E23",
                enumerable: false
            });
        }
    }
    return modulesOptions;
}
function normalizeOptions(rawOptions, loaderContext) {
    if (rawOptions.icss) {
        loaderContext.emitWarning(Object.defineProperty(new Error('The "icss" option is deprecated, use "modules.compileType: "icss"" instead'), "__NEXT_ERROR_CODE", {
            value: "E476",
            enumerable: false
        }));
    }
    const modulesOptions = getModulesOptions(rawOptions, loaderContext);
    return {
        url: typeof rawOptions.url === 'undefined' ? true : rawOptions.url,
        import: typeof rawOptions.import === 'undefined' ? true : rawOptions.import,
        modules: modulesOptions,
        // TODO remove in the next major release
        icss: typeof rawOptions.icss === 'undefined' ? false : rawOptions.icss,
        sourceMap: typeof rawOptions.sourceMap === 'boolean' ? rawOptions.sourceMap : loaderContext.sourceMap,
        importLoaders: typeof rawOptions.importLoaders === 'string' ? parseInt(rawOptions.importLoaders, 10) : rawOptions.importLoaders,
        esModule: typeof rawOptions.esModule === 'undefined' ? true : rawOptions.esModule,
        fontLoader: rawOptions.fontLoader
    };
}
export default async function loader(content, map, meta) {
    const rawOptions = this.getOptions();
    const plugins = [];
    const callback = this.async();
    const loaderSpan = this.currentTraceSpan.traceChild('css-loader');
    loaderSpan.traceAsyncFn(async ()=>{
        let options;
        try {
            options = normalizeOptions(rawOptions, this);
        } catch (error) {
            throw error;
        }
        const { postcss } = await rawOptions.postcss();
        const { shouldUseModulesPlugins, shouldUseImportPlugin, shouldUseURLPlugin, shouldUseIcssPlugin, getPreRequester, getExportCode, getFilter, getImportCode, getModuleCode, getModulesPlugins, normalizeSourceMap, sort } = require('./utils');
        const { icssParser, importParser, urlParser } = require('./plugins');
        const replacements = [];
        // if it's a font loader next-font-loader will have exports that should be exported as is
        const exports = options.fontLoader ? meta.exports : [];
        if (shouldUseModulesPlugins(options)) {
            plugins.push(...getModulesPlugins(options, this, meta));
        }
        const importPluginImports = [];
        const importPluginApi = [];
        if (shouldUseImportPlugin(options)) {
            const resolver = this.getResolve({
                conditionNames: [
                    'style'
                ],
                extensions: [
                    '.css'
                ],
                mainFields: [
                    'css',
                    'style',
                    'main',
                    '...'
                ],
                mainFiles: [
                    'index',
                    '...'
                ],
                restrictions: [
                    /\.css$/i
                ]
            });
            plugins.push(importParser({
                imports: importPluginImports,
                api: importPluginApi,
                context: this.context,
                rootContext: this.rootContext,
                filter: getFilter(options.import, this.resourcePath),
                resolver,
                urlHandler: (url)=>stringifyRequest(this, getPreRequester(this)(options.importLoaders) + url)
            }));
        }
        const urlPluginImports = [];
        if (shouldUseURLPlugin(options)) {
            const urlResolver = this.getResolve({
                conditionNames: [
                    'asset'
                ],
                mainFields: [
                    'asset'
                ],
                mainFiles: [],
                extensions: []
            });
            plugins.push(urlParser({
                imports: urlPluginImports,
                replacements,
                context: this.context,
                rootContext: this.rootContext,
                filter: getFilter(options.url, this.resourcePath),
                resolver: urlResolver,
                urlHandler: (url)=>stringifyRequest(this, url)
            }));
        }
        const icssPluginImports = [];
        const icssPluginApi = [];
        if (shouldUseIcssPlugin(options)) {
            const icssResolver = this.getResolve({
                conditionNames: [
                    'style'
                ],
                extensions: [],
                mainFields: [
                    'css',
                    'style',
                    'main',
                    '...'
                ],
                mainFiles: [
                    'index',
                    '...'
                ]
            });
            plugins.push(icssParser({
                imports: icssPluginImports,
                api: icssPluginApi,
                replacements,
                exports,
                context: this.context,
                rootContext: this.rootContext,
                resolver: icssResolver,
                urlHandler: (url)=>stringifyRequest(this, getPreRequester(this)(options.importLoaders) + url)
            }));
        }
        // Reuse CSS AST (PostCSS AST e.g 'postcss-loader') to avoid reparsing
        if (meta) {
            const { ast } = meta;
            if (ast && ast.type === 'postcss') {
                // eslint-disable-next-line no-param-reassign
                content = ast.root;
                loaderSpan.setAttribute('astUsed', 'true');
            }
        }
        const { resourcePath } = this;
        let result;
        try {
            result = await postcss(plugins).process(content, {
                from: resourcePath,
                to: resourcePath,
                map: options.sourceMap ? {
                    prev: map ? normalizeSourceMap(map, resourcePath) : null,
                    inline: false,
                    annotation: false
                } : false
            });
        } catch (error) {
            if (error.file) {
                this.addDependency(error.file);
            }
            throw error.name === 'CssSyntaxError' ? Object.defineProperty(new CssSyntaxError(error), "__NEXT_ERROR_CODE", {
                value: "E394",
                enumerable: false
            }) : error;
        }
        for (const warning of result.warnings()){
            this.emitWarning(Object.defineProperty(new Warning(warning), "__NEXT_ERROR_CODE", {
                value: "E394",
                enumerable: false
            }));
        }
        const imports = [
            ...icssPluginImports.sort(sort),
            ...importPluginImports.sort(sort),
            ...urlPluginImports.sort(sort)
        ];
        const api = [
            ...importPluginApi.sort(sort),
            ...icssPluginApi.sort(sort)
        ];
        if (options.modules.exportOnlyLocals !== true) {
            imports.unshift({
                importName: '___CSS_LOADER_API_IMPORT___',
                url: stringifyRequest(this, require.resolve('./runtime/api'))
            });
        }
        const importCode = getImportCode(imports, options);
        const moduleCode = getModuleCode(result, api, replacements, options, this);
        const exportCode = getExportCode(exports, replacements, options);
        return `${importCode}${moduleCode}${exportCode}`;
    }).then((code)=>{
        callback(null, code);
    }, (err)=>{
        callback(err);
    });
}

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