# Backup Command Handler
# Domain: Multi-backend backup management (restic, borg, tar, rsync)

use ./shared.nu *

def backup-create [name: string paths: list --check = false] { {name: $name, paths: $paths} }
def backup-restore [snapshot_id: string --check = false] { {snapshot_id: $snapshot_id} }
def backup-list [--backend = "restic"] { [] }
def backup-schedule [name: string cron: string] { {name: $name, cron: $cron} }
def backup-retention [] { {daily: 7, weekly: 4, monthly: 12, yearly: 7} }
def backup-status [job_id: string] { {job_id: $job_id, status: "pending"} }

export def cmd-backup [
    action: string
    args: list = []
    --check = false
] {
    if ($action == null) { help-backup; return }

    match $action {
        "create" => {
            let name = ($args | get 0?)
            if ($name == null) {
                print "Usage: provisioning backup create <name> [paths...]"
                exit 1
            }
            let paths = ($args | skip 1)
            let result = (backup-create $name $paths --check=$check)
            print $"Backup created: [$result.name]"
        }
        "restore" => {
            let snapshot_id = ($args | get 0?)
            if ($snapshot_id == null) {
                print "Usage: provisioning backup restore <snapshot_id>"
                exit 1
            }
            let result = (backup-restore $snapshot_id --check=$check)
            print $"Restore initiated: [$result.snapshot_id]"
        }
        "list" => {
            let backend = ($args | get 0? | default "restic")
            let snapshots = (backup-list --backend=$backend)
            if ($snapshots | length) == 0 {
                print "No snapshots found"
            } else {
                print "Available snapshots:"
            }
        }
        "schedule" => {
            let name = ($args | get 0?)
            let cron = ($args | get 1?)
            if ($name == null or $cron == null) {
                print "Usage: provisioning backup schedule <name> <cron>"
                exit 1
            }
            let result = (backup-schedule $name $cron)
            print $"Schedule created: [$result.name]"
        }
        "retention" => {
            let config = (backup-retention)
            print $"Retention policy:"
            print $"  Daily: [$config.daily] days"
            print $"  Weekly: [$config.weekly] weeks"
            print $"  Monthly: [$config.monthly] months"
            print $"  Yearly: [$config.yearly] years"
        }
        "status" => {
            let job_id = ($args | get 0?)
            if ($job_id == null) {
                print "Usage: provisioning backup status <job_id>"
                exit 1
            }
            let status = (backup-status $job_id)
            print $"Job [$status.job_id]: ($status.status)"
        }
        "help" | "--help" => { help-backup }
        _ => { print $"Unknown backup command: [$action]"; help-backup; exit 1 }
    }
}

def help-backup [] {
    print "Backup management - Multi-backend backup with retention"
    print ""
    print "Usage: provisioning backup <action> [args]"
    print ""
    print "Actions:"
    print "  create <name> [paths]   Create backup job"
    print "  restore <snapshot>      Restore from snapshot"
    print "  list [backend]          List snapshots"
    print "  schedule <name> <cron>  Schedule regular backups"
    print "  retention               Show retention policy"
    print "  status <job_id>         Check backup status"
}