import { compileFileSync } from "@marko/compiler";
import fs from "fs";
import autotest from "mocha-autotest";
import path from "path";

const ansiReg =
  // eslint-disable-next-line no-control-regex
  /([\u001b\u009b][[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-ORZcf-nqry=><])/g;
const regexpCharsReg = /[\\^$.*+?()[\]{}|]/g;
const cwdRegExp = new RegExp(
  process.cwd().replace(regexpCharsReg, "\\$&") + "/",
  "g",
);

describe("runtime-class/translator", () => {
  autotest("fixtures", {
    cjs: runTest({ output: "html", modules: "cjs" }),
    html: runTest({ output: "html" }),
    htmlProduction: runTest({
      output: "html",
      optimize: true,
    }),
    vdom: runTest({ output: "dom" }),
    vdomProduction: runTest({
      output: "dom",
      optimize: true,
    }),
    generated: runTest({ output: "migrate" }),
    hydrate: runTest({
      output: "hydrate",
      resolveVirtualDependency(from, { virtualPath }) {
        return virtualPath;
      },
    }),
  });
});

function runTest(config) {
  return ({ mode, test, resolve, snapshot }) => {
    const relativeFixtureDir = path.relative(process.cwd(), resolve("."));
    const testConfigFile = resolve("test.js");
    const testConfig = fs.existsSync(testConfigFile)
      ? require(testConfigFile)
      : {};
    const templateFile = resolve(testConfig.templateFile || "template.marko");

    const compilerConfig = {
      ...config,
      babelConfig: {
        ...config.babelConfig,
        babelrc: false,
        configFile: false,
      },
      writeVersionComment: false,
    };

    const snapshotsDir = resolve("snapshots");
    const name = `snapshots${path.sep + mode}`;
    const stripFixtureDir = (str) =>
      str.replaceAll(relativeFixtureDir, "__tests__");

    if (!fs.existsSync(snapshotsDir)) {
      fs.mkdirSync(snapshotsDir);
    }

    test(() => {
      let output;
      let diags;
      try {
        const result = compileFileSync(templateFile, compilerConfig);
        output = stripFixtureDir(result.code);
        diags = result.meta.diagnostics;
      } catch (err) {
        try {
          snapshot(
            stripFixtureDir(
              stripCwd(
                stripModuleStackTrace(String(err.stack).replace(ansiReg, "")),
              ),
            ),
            {
              name: `${name}-error`,
              ext: ".txt",
            },
          );
          return;
        } catch {
          throw err;
        }
      }

      snapshot(output, {
        name,
        ext: mode === "generated" ? ".marko" : ".js",
      });

      if (mode === "generated") {
        snapshot(output, {
          name,
          ext: ".marko",
        });

        if (diags && diags.length) {
          snapshot(stripFixtureDir(printDiags(diags)), {
            name,
            ext: ".diagnostics.txt",
          });
        }
      } else {
        snapshot(output, {
          name,
          ext: ".js",
        });
      }
    });
  };
}

function stripCwd(message) {
  return message.replace(cwdRegExp, "");
}

function stripModuleStackTrace(message) {
  return message.replace(/\r?\n +at (?!packages[/\\])[^\n]+$/gm, "");
}

function printDiags(diags) {
  let result = "";

  for (const diag of diags) {
    result += `${diag.type}${diag.fix ? `[fixable]` : ""}${printLoc(
      diag.loc,
    )}: ${diag.label}\n`;
  }

  return result;
}

function printLoc(loc) {
  if (loc) {
    return `(${loc.start.line}:${loc.start.column + 1}-${loc.end.line}:${
      loc.end.column + 1
    })`;
  }

  return "";
}