import fs from "fs";

import path from "path";

/** @typedef {{

category: string;

code: number;

reportsUnnecessary?: {};

reportsDeprecated?: {};

isEarly?: boolean;

elidedInCompatabilityPyramid?: boolean;

}} DiagnosticDetails */

void 0;

/** @typedef {Map<string, DiagnosticDetails>} InputDiagnosticMessageTable */

async function main() {

if (process.argv.length < 3) {

console.log("Usage:");

console.log("\tnode processDiagnosticMessages.mjs <diagnostic-json-input-file>");

return;

}

/**

* @param {string} fileName

* @param {string} contents

*/

async function writeFile(fileName, contents) {

const filePath = path.join(path.dirname(inputFilePath), fileName);

try {

const existingContents = await fs.promises.readFile(filePath, "utf-8");

if (existingContents === contents) {

return;

}

}

catch {

// Just write the file.

}

await fs.promises.writeFile(filePath, contents, { encoding: "utf-8" });

}

const inputFilePath = process.argv[2].replace(/\\/g, "/");

console.log(`Reading diagnostics from ${inputFilePath}`);

const inputStr = await fs.promises.readFile(inputFilePath, { encoding: "utf-8" });

/** @type {{ [key: string]: DiagnosticDetails }} */

const diagnosticMessagesJson = JSON.parse(inputStr);

/** @type {InputDiagnosticMessageTable} */

const diagnosticMessages = new Map();

for (const key in diagnosticMessagesJson) {

if (Object.hasOwnProperty.call(diagnosticMessagesJson, key)) {

diagnosticMessages.set(key, diagnosticMessagesJson[key]);

}

}

const infoFileOutput = buildInfoFileOutput(diagnosticMessages, inputFilePath);

checkForUniqueCodes(diagnosticMessages);

await writeFile("diagnosticInformationMap.generated.ts", infoFileOutput);

const messageOutput = buildDiagnosticMessageOutput(diagnosticMessages);

await writeFile("diagnosticMessages.generated.json", messageOutput);

}

/**

* @param {InputDiagnosticMessageTable} diagnosticTable

*/

function checkForUniqueCodes(diagnosticTable) {

/** @type {Record<number, true | undefined>} */

const allCodes = [];

diagnosticTable.forEach(({ code }) => {

if (allCodes[code]) {

throw new Error(`Diagnostic code ${code} appears more than once.`);

}

allCodes[code] = true;

});

}

/**

* @param {InputDiagnosticMessageTable} messageTable

* @param {string} inputFilePathRel

* @returns {string}

*/

function buildInfoFileOutput(messageTable, inputFilePathRel) {

const result = [

"// <auto-generated />",

`// generated from '${inputFilePathRel}'`,

"",

'import { DiagnosticCategory, DiagnosticMessage } from "./types";',

"",

"function diag(code: number, category: DiagnosticCategory, key: string, message: string, reportsUnnecessary?: {}, elidedInCompatabilityPyramid?: boolean, reportsDeprecated?: {}): DiagnosticMessage {",

" return { code, category, key, message, reportsUnnecessary, elidedInCompatabilityPyramid, reportsDeprecated };",

"}",

"",

"/** @internal */",

"export const Diagnostics = {",

];

messageTable.forEach(({ code, category, reportsUnnecessary, elidedInCompatabilityPyramid, reportsDeprecated }, name) => {

const propName = convertPropertyName(name);

const argReportsUnnecessary = reportsUnnecessary ? `, /*reportsUnnecessary*/ ${reportsUnnecessary}` : "";

const argElidedInCompatabilityPyramid = elidedInCompatabilityPyramid ? `${!reportsUnnecessary ? ", /*reportsUnnecessary*/ undefined" : ""}, /*elidedInCompatabilityPyramid*/ ${elidedInCompatabilityPyramid}` : "";

const argReportsDeprecated = reportsDeprecated ? `${!argElidedInCompatabilityPyramid ? ", /*reportsUnnecessary*/ undefined, /*elidedInCompatabilityPyramid*/ undefined" : ""}, /*reportsDeprecated*/ ${reportsDeprecated}` : "";

result.push(` ${propName}: diag(${code}, DiagnosticCategory.${category}, "${createKey(propName, code)}", ${JSON.stringify(name)}${argReportsUnnecessary}${argElidedInCompatabilityPyramid}${argReportsDeprecated}),`);

});

result.push("};");

return result.join("\r\n");

}

/**

* @param {InputDiagnosticMessageTable} messageTable

* @returns {string}

*/

function buildDiagnosticMessageOutput(messageTable) {

/** @type {Record<string, string>} */

const result = {};

messageTable.forEach(({ code }, name) => {

const propName = convertPropertyName(name);

result[createKey(propName, code)] = name;

});

return JSON.stringify(result, undefined, 2).replace(/\r?\n/g, "\r\n");

}

/**

* @param {string} name

* @param {number} code

* @returns {string}

*/

function createKey(name, code) {

return name.slice(0, 100) + "_" + code;

}

/**

* @param {string} origName

* @returns {string}

*/

function convertPropertyName(origName) {

let result = origName.split("").map(char => {

if (char === "*") return "_Asterisk";

if (char === "/") return "_Slash";

if (char === ":") return "_Colon";

return /\w/.test(char) ? char : "_";

}).join("");

// get rid of all multi-underscores

result = result.replace(/_+/g, "_");

// remove any leading underscore, unless it is followed by a number.

result = result.replace(/^_([^\d])/, "$1");

// get rid of all trailing underscores.

result = result.replace(/_$/, "");

return result;

}

main();