import { dtsCritic as critic, ErrorKind } from "./index";
import fs = require("fs");
import stripJsonComments = require("strip-json-comments");

function hasNpmNamingLintRule(tslintPath: string): boolean {
    if (fs.existsSync(tslintPath)) {
        const tslint = JSON.parse(stripJsonComments(fs.readFileSync(tslintPath, "utf-8")));
        if(tslint.rules && tslint.rules["npm-naming"] !== undefined) {
            return !!tslint.rules["npm-naming"];
        }
        return true;
    }
    return false;
}

function addNpmNamingLintRule(tslintPath: string): void {
    if (fs.existsSync(tslintPath)) {
        const tslint = JSON.parse(stripJsonComments(fs.readFileSync(tslintPath, "utf-8")));
        if (tslint.rules) {
            tslint.rules["npm-naming"] = false;
        }
        else {
            tslint.rules = { "npm-naming": false };
        }
        fs.writeFileSync(tslintPath, JSON.stringify(tslint, undefined, 4), "utf-8");
    }
}

function main() {
    for (const item of fs.readdirSync("../DefinitelyTyped/types")) {
        const entry = "../DefinitelyTyped/types/" + item;
        try {
            if (hasNpmNamingLintRule(entry + "/tslint.json")) {
                const errors = critic(entry + "/index.d.ts");
                for (const error of errors) {
                    switch (error.kind) {
                        case ErrorKind.NoMatchingNpmPackage:
                            console.log(`No matching npm package found for ` + item);
                            // const re = /\/\/ Type definitions for/;
                            // const s = fs.readFileSync(entry + '/index.d.ts', 'utf-8')
                            // fs.writeFileSync(entry + '/index.d.ts', s.replace(re, '// Type definitions for non-npm package'), 'utf-8')
                            break;
                        case ErrorKind.NoDefaultExport:
                            console.log("converting", item, "to export = ...");
                            const named = /export default function\s+(\w+\s*)\(/;
                            const anon = /export default function\s*\(/;
                            const id = /export default(\s+\w+);/;
                            let s = fs.readFileSync(entry + "/index.d.ts", "utf-8");
                            s = s.replace(named, "export = $1;\ndeclare function $1(");
                            s = s.replace(anon, "export = _default;\ndeclare function _default(");
                            s = s.replace(id, "export =$1;");
                            fs.writeFileSync(entry + "/index.d.ts", s, "utf-8");
                            break;
                        case ErrorKind.NoMatchingNpmVersion:
                            const m = error.message.match(/in the header, ([0-9.]+),[\s\S]to match one on npm: ([0-9., ]+)\./);
                            if (m) {
                                const headerver = parseFloat(m[1]);
                                const npmvers = m[2].split(",").map((s: string) => parseFloat(s.trim()));
                                const fixto = npmvers.every((v: number) => headerver > v) ? -1.0 : Math.max(...npmvers);
                                console.log(`npm-version:${item}:${m[1]}:${m[2]}:${fixto}`);
                                addNpmNamingLintRule(entry + "/tslint.json");
                            }
                            else {
                                console.log("could not parse error message: ", error.message);
                            }
                            break;
                        default:
                            console.log(error.message);
                    }
                }
            }
        }
        catch (e) {
            console.log("*** ERROR for " + item + " ***");
            console.log(e);
        }
    }
}
main();