"use strict";
/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
const path = require("path");
const minimatch = require("minimatch");
const utils_1 = require("./utils");
const REPO_ROOT = path.normalize(path.join(__dirname, '../../../'));
function isLayerAllowRule(option) {
    return !!(option.when && option.allow);
}
/**
 * Returns the filename relative to the project root and using `/` as separators
 */
function getRelativeFilename(context) {
    const filename = path.normalize(context.getFilename());
    return filename.substring(REPO_ROOT.length).replace(/\\/g, '/');
}
module.exports = new class {
    constructor() {
        this.meta = {
            messages: {
                badImport: 'Imports violates \'{{restrictions}}\' restrictions. See https://github.com/microsoft/vscode/wiki/Source-Code-Organization',
                badFilename: 'Missing definition in `code-import-patterns` for this file. Define rules at https://github.com/microsoft/vscode/blob/main/.eslintrc.json'
            },
            docs: {
                url: 'https://github.com/microsoft/vscode/wiki/Source-Code-Organization'
            }
        };
        this._optionsCache = new WeakMap();
    }
    create(context) {
        const options = context.options;
        const configs = this._processOptions(options);
        const relativeFilename = getRelativeFilename(context);
        for (const config of configs) {
            if (minimatch(relativeFilename, config.target)) {
                return (0, utils_1.createImportRuleListener)((node, value) => this._checkImport(context, config, node, value));
            }
        }
        context.report({
            loc: { line: 1, column: 0 },
            messageId: 'badFilename'
        });
        return {};
    }
    _processOptions(options) {
        if (this._optionsCache.has(options)) {
            return this._optionsCache.get(options);
        }
        function orSegment(variants) {
            return (variants.length === 1 ? variants[0] : `{${variants.join(',')}}`);
        }
        const layerRules = [
            { layer: 'common', deps: orSegment(['common']) },
            { layer: 'worker', deps: orSegment(['common', 'worker']) },
            { layer: 'browser', deps: orSegment(['common', 'browser']), isBrowser: true },
            { layer: 'electron-sandbox', deps: orSegment(['common', 'browser', 'electron-sandbox']), isBrowser: true },
            { layer: 'node', deps: orSegment(['common', 'node']), isNode: true },
            { layer: 'electron-browser', deps: orSegment(['common', 'browser', 'node', 'electron-sandbox', 'electron-browser']), isBrowser: true, isNode: true },
            { layer: 'electron-main', deps: orSegment(['common', 'node', 'electron-main']), isNode: true },
        ];
        let browserAllow = [];
        let nodeAllow = [];
        let testAllow = [];
        for (const option of options) {
            if (isLayerAllowRule(option)) {
                if (option.when === 'hasBrowser') {
                    browserAllow = option.allow.slice(0);
                }
                else if (option.when === 'hasNode') {
                    nodeAllow = option.allow.slice(0);
                }
                else if (option.when === 'test') {
                    testAllow = option.allow.slice(0);
                }
            }
        }
        function findLayer(layer) {
            for (const layerRule of layerRules) {
                if (layerRule.layer === layer) {
                    return layerRule;
                }
            }
            return null;
        }
        function generateConfig(layerRule, target, rawRestrictions) {
            const restrictions = [];
            const testRestrictions = [...testAllow];
            if (layerRule.isBrowser) {
                restrictions.push(...browserAllow);
            }
            if (layerRule.isNode) {
                restrictions.push(...nodeAllow);
            }
            for (const rawRestriction of rawRestrictions) {
                let importPattern;
                let when = undefined;
                if (typeof rawRestriction === 'string') {
                    importPattern = rawRestriction;
                }
                else {
                    importPattern = rawRestriction.pattern;
                    when = rawRestriction.when;
                }
                if (typeof when === 'undefined'
                    || (when === 'hasBrowser' && layerRule.isBrowser)
                    || (when === 'hasNode' && layerRule.isNode)) {
                    restrictions.push(importPattern.replace(/\/\~$/, `/${layerRule.deps}/**`));
                    testRestrictions.push(importPattern.replace(/\/\~$/, `/test/${layerRule.deps}/**`));
                }
                else if (when === 'test') {
                    testRestrictions.push(importPattern.replace(/\/\~$/, `/${layerRule.deps}/**`));
                    testRestrictions.push(importPattern.replace(/\/\~$/, `/test/${layerRule.deps}/**`));
                }
            }
            testRestrictions.push(...restrictions);
            return [
                {
                    target: target.replace(/\/\~$/, `/${layerRule.layer}/**`),
                    restrictions: restrictions
                },
                {
                    target: target.replace(/\/\~$/, `/test/${layerRule.layer}/**`),
                    restrictions: testRestrictions
                }
            ];
        }
        const configs = [];
        for (const option of options) {
            if (isLayerAllowRule(option)) {
                continue;
            }
            const target = option.target;
            const targetIsVS = /^src\/vs\//.test(target);
            const restrictions = (typeof option.restrictions === 'string' ? [option.restrictions] : option.restrictions).slice(0);
            if (targetIsVS) {
                // Always add "vs/nls"
                restrictions.push('vs/nls');
            }
            if (targetIsVS && option.layer) {
                // single layer => simple substitution for /~
                const layerRule = findLayer(option.layer);
                if (layerRule) {
                    const [config, testConfig] = generateConfig(layerRule, target, restrictions);
                    if (option.test) {
                        configs.push(testConfig);
                    }
                    else {
                        configs.push(config);
                    }
                }
            }
            else if (targetIsVS && /\/\~$/.test(target)) {
                // generate all layers
                for (const layerRule of layerRules) {
                    const [config, testConfig] = generateConfig(layerRule, target, restrictions);
                    configs.push(config);
                    configs.push(testConfig);
                }
            }
            else {
                configs.push({ target, restrictions: restrictions.filter(r => typeof r === 'string') });
            }
        }
        this._optionsCache.set(options, configs);
        return configs;
    }
    _checkImport(context, config, node, importPath) {
        // resolve relative paths
        if (importPath[0] === '.') {
            const relativeFilename = getRelativeFilename(context);
            importPath = path.posix.join(path.posix.dirname(relativeFilename), importPath);
            if (/^src\/vs\//.test(importPath)) {
                // resolve using AMD base url
                importPath = importPath.substring('src/'.length);
            }
        }
        const restrictions = config.restrictions;
        let matched = false;
        for (const pattern of restrictions) {
            if (minimatch(importPath, pattern)) {
                matched = true;
                break;
            }
        }
        if (!matched) {
            // None of the restrictions matched
            context.report({
                loc: node.loc,
                messageId: 'badImport',
                data: {
                    restrictions: restrictions.join(' or ')
                }
            });
        }
    }
};