const path = require("path");
const fs = require("fs");
const { execSync } = require("child_process");

console.log("\nVencord Installer\n");

if (!fs.existsSync(path.join(process.cwd(), "node_modules"))) {
    console.log("You need to install dependencies first. Run:", "pnpm install");
    process.exit(1);
}

if (!fs.existsSync(path.join(process.cwd(), "dist", "patcher.js"))) {
    console.log("You need to build the project first. Run:", "pnpm build");
    process.exit(1);
}

const {
    getMenuItem,
    getWindowsDirs,
    getDarwinDirs,
    getLinuxDirs,
    ENTRYPOINT,
} = require("./common");

switch (process.platform) {
    case "win32":
        install(getWindowsDirs());
        break;
    case "darwin":
        install(getDarwinDirs());
        break;
    case "linux":
        install(getLinuxDirs());
        break;
    default:
        console.log("Unknown OS");
        break;
}

async function install(installations) {
    const selected = await getMenuItem(installations);

    // Attempt to give flatpak perms
    if (selected.isFlatpak) {
        try {
            const branch = selected.branch;
            const cwd = process.cwd();
            const globalCmd = `flatpak override ${branch} --filesystem=${cwd}`;
            const userCmd = `flatpak override --user ${branch} --filesystem=${cwd}`;
            const cmd = selected.location.startsWith("/home")
                ? userCmd
                : globalCmd;
            execSync(cmd);
            console.log("Successfully gave write perms to Discord Flatpak.");
        } catch (e) {
            console.log("Failed to give write perms to Discord Flatpak.");
            console.log(
                "Try running this script as an administrator:",
                "sudo pnpm patch"
            );
            process.exit(1);
        }
    }

    for (const version of selected.versions) {
        const dir = version.path;
        // Check if we have write perms to the install directory...
        try {
            fs.accessSync(selected.location, fs.constants.W_OK);
        } catch (e) {
            console.error("No write access to", selected.location);
            console.error(
                "Try running this script as an administrator:",
                "sudo pnpm patch"
            );
            process.exit(1);
        }
        if (fs.existsSync(dir) && fs.lstatSync(dir).isDirectory()) {
            fs.rmSync(dir, { recursive: true });
        }
        if (!fs.existsSync(dir)) {
            fs.mkdirSync(dir, { recursive: true });
        }

        fs.writeFileSync(
            path.join(dir, "index.js"),
            `require("${ENTRYPOINT}"); require("../app.asar");`
        );
        fs.writeFileSync(
            path.join(dir, "package.json"),
            JSON.stringify({
                name: "discord",
                main: "index.js",
            })
        );

        const requiredFiles = ["index.js", "package.json"];

        if (requiredFiles.every((f) => fs.existsSync(path.join(dir, f)))) {
            console.log(
                "Successfully patched",
                version.name
                    ? `${selected.branch} ${version.name}`
                    : selected.branch
            );
        } else {
            console.log("Failed to patch", dir);
            console.log("Files in directory:", fs.readdirSync(dir));
        }
    }
}