// forgejo doesn't have a built-in way to clear old actions logs, so we have to do it manually
// https://github.com/go-gitea/gitea/issues/24256, didnt find a separate issue for forgejo

import * as fs from 'fs'
import * as path from 'path'

const LOGS_DIR = '/srv/forgejo/data/data/actions_log'
const RETENTION = 30 * 24 * 60 * 60 * 1000 // 30 days

function handleLogsDir(dir) {
    // the actions_log dir structure is something like this:
    // actions_log/owner/repo/job-id-hex/job-id.log.zst
    // (todo: verify this is the case)
    let found = false
    const subdirs = fs.readdirSync(dir, { withFileTypes: true })
    for (const subdir of subdirs) {
        if (!subdir.isDirectory()) continue

        const fullPath = path.join(dir, subdir.name)

        // validate that the structure is how we expect it
        const jobId = parseInt(subdir.name, 16)
        if (isNaN(jobId)) {
            console.error(`invalid job id at: ${fullPath}`)
            process.exit(1)
        }

        const children = fs.readdirSync(fullPath, { withFileTypes: true })
        if (children.length !== 1 || !children[0].isFile() || children[0].name !== `${jobId}.log.zst`) {
            console.error(`Invalid actions_log dir: ${dir}`)
            process.exit(1)
        }

        const stat = fs.statSync(fullPath)
        if (stat.mtimeMs < Date.now() - RETENTION) {
            console.log(`deleting old (${new Date(stat.mtimeMs).toISOString()}) actions log: ${fullPath}`)
            fs.rmSync(fullPath, { recursive: true })
            found = true
        }
    }

}

for (const owner of fs.readdirSync(LOGS_DIR)) {
    for (const repo of fs.readdirSync(path.join(LOGS_DIR, owner))) {
        handleLogsDir(path.join(LOGS_DIR, owner, repo))
    }
}