#! /usr/bin/env node

// @ts-check

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

const confFileProvidedJSON = process.argv[process.argv.length - 1];

try {
    /** @type {TurboSyncConfigObject} */
    const configFileObject = JSON.parse(confFileProvidedJSON);

    console.log(`Running '${configFileObject.title}' ...`);

    if (
        Array.isArray(configFileObject.files) &&
        Array.isArray(configFileObject.folders)
    ) {
        throw new Error("Choose wither `files` or `folders`. Not both");
    }

    const files = configFileObject?.files;
    const firstFile = files?.[0];
    const folders = configFileObject?.folders;
    const firstFolder = folders?.[0];

    const options = configFileObject.options;

    if (firstFile && files) {
        for (let i = 0; i < files.length; i++) {
            const file = files[i];
            const filePath =
                typeof file == "string" ? file : file?.path ? file.path : null;
            const interval = typeof file == "object" ? file.interval : null;
            if (!filePath) continue;

            if (typeof file == "string" && !fs.existsSync(filePath))
                throw new Error("File Doesn't exist");
            if (typeof file == "string" && !fs.statSync(filePath).isFile()) {
                throw new Error(`'${filePath}' is not a File!`);
            }

            if (typeof file == "object" && file.host) {
                // TODO Handle SSH
            } else if (typeof file == "string") {
                fs.watchFile(
                    filePath,
                    {
                        interval: interval || 500,
                    },
                    (curr, prev) => {
                        let cmdArray = ["rsync", "-avh"];

                        if (options?.delete) {
                            cmdArray.push("--delete");
                        }

                        if (options?.exclude?.[0]) {
                            options.exclude.forEach((excl) => {
                                cmdArray.push(`--exclude '${excl}'`);
                            });
                        }

                        const destFiles = files.filter((fl) => {
                            if (typeof fl == "string") return fl !== filePath;
                            if (fl?.path) return fl.path !== filePath;
                            return false;
                        });

                        for (let j = 0; j < destFiles.length; j++) {
                            const dstFl = destFiles[j];
                            if (typeof dstFl == "string") {
                                if (!fs.existsSync(dstFl)) continue;
                                cmdArray.push(filePath, dstFl);
                                const cmd = cmdArray.join(" ");
                                execSync(cmd, {
                                    stdio: "inherit",
                                });
                            } else if (dstFl.path) {
                                if (!dstFl.host && !fs.existsSync(dstFl.path))
                                    continue;

                                if (dstFl.host && dstFl.ssh_key && dstFl.user) {
                                    cmdArray.push(
                                        "-e",
                                        `'ssh -i ${dstFl.ssh_key}'`
                                    );
                                    cmdArray.push(
                                        filePath,
                                        `${dstFl.user}@${dstFl.host}:${dstFl.path}`
                                    );
                                    const cmd = cmdArray.join(" ");
                                    execSync(cmd, {
                                        stdio: "inherit",
                                    });
                                } else {
                                    cmdArray.push(filePath, dstFl.path);
                                    const cmd = cmdArray.join(" ");
                                    execSync(cmd, {
                                        stdio: "inherit",
                                    });
                                }
                            }
                        }

                        process.exit(1);
                    }
                );
            }
        }
    } else if (firstFolder && folders?.[0]) {
        const dirs = folders;

        for (let i = 0; i < dirs.length; i++) {
            const dir = dirs[i];

            if (!dir) continue;

            const dirPath = typeof dir == "string" ? dir : dir.path;

            if (typeof dir == "string") {
            }

            if (typeof dir == "string" && !fs.existsSync(dirPath)) {
                fs.mkdirSync(dirPath, {
                    recursive: true,
                });
            }

            if (typeof dir == "string") {
                fs.watch(dirPath, { recursive: true }, (evt, fileName) => {
                    let cmdArray = ["rsync", "-avh"];

                    if (options?.delete) {
                        cmdArray.push("--delete");
                    }

                    if (options?.exclude?.[0]) {
                        options.exclude.forEach((excl) => {
                            cmdArray.push(`--exclude '${excl}'`);
                        });
                    }

                    const dstDirs = dirs.filter((dr) => {
                        if (typeof dr == "string") return dr !== dirPath;
                        if (dr?.path) return dr.path !== dirPath;
                        return false;
                    });

                    for (let j = 0; j < dstDirs.length; j++) {
                        const dstDr = dstDirs[j];
                        if (typeof dstDr == "string") {
                            if (!fs.existsSync(dstDr)) continue;
                            cmdArray.push(
                                path.normalize(dirPath) + "/",
                                path.normalize(dstDr) + "/"
                            );
                            const cmd = cmdArray.join(" ");
                            execSync(cmd, {
                                stdio: "inherit",
                            });
                        } else if (dstDr.path) {
                            if (!dstDr.host && !fs.existsSync(dstDr.path))
                                continue;

                            if (dstDr.host && dstDr.ssh_key && dstDr.user) {
                                cmdArray.push(
                                    "-e",
                                    `'ssh -i ${dstDr.ssh_key}'`
                                );
                                cmdArray.push(
                                    path.normalize(dirPath) + "/",
                                    `${dstDr.user}@${dstDr.host}:${dstDr.path}/`
                                );
                                const cmd = cmdArray.join(" ");
                                execSync(cmd, {
                                    stdio: "inherit",
                                });
                            } else {
                                cmdArray.push(
                                    path.normalize(dirPath),
                                    path.normalize(dstDr.path)
                                );
                                const cmd = cmdArray.join(" ");
                                execSync(cmd, {
                                    stdio: "inherit",
                                });
                            }
                        }
                    }

                    process.exit(1);
                });
            }
        }
    }
} catch (error) {
    console.log(error);
    process.exit();
}

process.on("exit", (code) => {
    if (code == 1) {
        const args = process.argv;
        const cmd = args.shift();
        if (cmd) {
            spawn(cmd, args, {
                stdio: "inherit",
            });
        }
    } else {
        process.exit(0);
    }
});