const fs = require('fs')
const path = require('path')

const oldPath = path.resolve(__dirname, '..', 'out', 'win-unpacked')
const newPath = path.resolve(__dirname, '..', 'out', 'CN_Tool')
const retryableErrorCodes = new Set(['EPERM', 'EBUSY', 'ENOTEMPTY', 'UNKNOWN'])
const maxAttempts = 10
const retryDelayMs = 1500

function sleep(ms) {
    return new Promise((resolve) => setTimeout(resolve, ms))
}

function isRetryable(error) {
    return retryableErrorCodes.has(error?.code)
}

async function removeIfExists(targetPath) {
    for (let attempt = 1; attempt <= maxAttempts; attempt++) {
        if (!fs.existsSync(targetPath)) {
            return
        }

        try {
            fs.rmSync(targetPath, { recursive: true, force: true })
            return
        } catch (error) {
            if (!isRetryable(error) || attempt === maxAttempts) {
                throw error
            }

            console.warn(
                `[rename-output] 目标目录正在被占用，${retryDelayMs}ms 后重试删除（${attempt}/${maxAttempts}）：${targetPath}`
            )
            await sleep(retryDelayMs)
        }
    }
}

async function renameWithRetry(sourcePath, targetPath) {
    // Windows 打包完成后，杀软、索引或资源管理器可能短暂占用目录，重试可避免误判为打包失败。
    for (let attempt = 1; attempt <= maxAttempts; attempt++) {
        try {
            fs.renameSync(sourcePath, targetPath)
            console.log('[rename-output] Renamed to CN_Tool')
            return
        } catch (error) {
            if (!isRetryable(error) || attempt === maxAttempts) {
                throw error
            }

            console.warn(
                `[rename-output] 输出目录暂时无法重命名，${retryDelayMs}ms 后重试（${attempt}/${maxAttempts}）：${error.code}`
            )
            await sleep(retryDelayMs)
        }
    }
}

async function main() {
    if (!fs.existsSync(oldPath)) {
        console.warn(`[rename-output] 未找到输出目录，跳过重命名：${oldPath}`)
        return
    }

    await removeIfExists(newPath)
    await renameWithRetry(oldPath, newPath)
}

main().catch((error) => {
    console.error(`[rename-output] 重命名失败：${error.message}`)
    process.exitCode = 1
})