#!/bin/bash
# Unified mirror sync + verification script
# Doc’s “Not my circus, not my monkeys” edition 🐒 + runtime tracking + before/after trust

set -euo pipefail
umask 022

LOGBASE="/var/log/mirror-verify"
GPGDIR="/etc/mirror-gpg"

MIRRORS=(
  # name|rsync_source|local_dir|logfile|manifest_url|sig_url|gpg_keyring
  "archlinux|rsync://arch.mirror.constant.com/archlinux/|/brimstone2/mirror/archlinux|$LOGBASE/arch-mirror-sync.log|https://geo.mirror.pkgbuild.com/iso/latest/archlinux-x86_64.iso|https://geo.mirror.pkgbuild.com/iso/latest/archlinux-x86_64.iso.sig|$GPGDIR/archlinux.gpg"
  "gentoo|rsync://masterdistfiles.gentoo.org/gentoo/|/brimstone2/mirror/gentoo|$LOGBASE/gentoo-mirror-sync.log|https://distfiles.gentoo.org/releases/amd64/autobuilds/current-stage3-amd64/sha256sum.txt|https://distfiles.gentoo.org/releases/amd64/autobuilds/current-stage3-amd64/sha256sum.txt.sig|$GPGDIR/gentoo.gpg"
  "hardenedbsd|rsync://rsync.hardenedbsd.org/all/|/mnt/brimstone/mirror/hardenedbsd|$LOGBASE/hbsd-sync.log|https://hardenedbsd.org/releases/CHECKSUMS.SHA256|https://hardenedbsd.org/releases/CHECKSUMS.SHA256.sig|$GPGDIR/hbsd.gpg"
  "void|rsync://repo-sync.voidlinux.org/voidlinux/|/mnt/brimstone/mirror/void|$LOGBASE/void-sync.log|https://repo.voidlinux.org/live/current/sha256sum.txt|https://repo.voidlinux.org/live/current/sha256sum.txt.sig|$GPGDIR/void.gpg"
  "slackware|rsync://mirrors.kernel.org/slackware/|/mnt/brimstone/mirror/slackware|$LOGBASE/slackware-sync.log|https://mirrors.slackware.com/slackware/slackware64-current/CHECKSUMS.md5|https://mirrors.slackware.com/slackware/slackware64-current/CHECKSUMS.md5.asc|$GPGDIR/slackware.gpg"
)

for entry in "${MIRRORS[@]}"; do
  IFS="|" read -r NAME SOURCE DEST LOG MANIFEST SIG KEYRING <<< "$entry"

  {
    echo "========== [$(date)] Starting $NAME =========="
    START=$(date +%s)

    # Banner title
    case "$NAME" in
      archlinux)   TITLE="Arch Linux Mirror Verifier" ;;
      gentoo)      TITLE="Gentoo Mirror Verifier" ;;
      hardenedbsd) TITLE="HardenedBSD Mirror Verifier" ;;
      void)        TITLE="Void Linux Mirror Verifier" ;;
      slackware)   TITLE="Slackware Mirror Verifier" ;;
      *)           TITLE="Mirror Verifier" ;;
    esac

    cat << EOF
 __  __ _                               
|  \/  (_) ___ _ __ ___   ___  _ __ ___ 
| |\/| | |/ __| '_ \` _ \ / _ \| '__/ _ \\
| |  | | | (__| | | | | | (_) | | |  __/
|_|  |_|_|\___|_| |_| |_|\___/|_|  \___| v1.0

       🐒  $TITLE – Not my circus
EOF

    echo "========== BEFORE Keyring Trust (fingerprints) for $NAME =========="
    if [ -f "$KEYRING" ]; then
      gpg --no-default-keyring --keyring "$KEYRING" --fingerprint || true
    else
      echo "[$NAME] No keyring available – cannot verify signatures."
    fi

    echo "========== Syncing $NAME =========="
    rsync -avhr --delete "$SOURCE" "$DEST"

    echo "========== Dry-run verification for $NAME =========="
    DRYRUN=$(rsync -nrv --delete "$SOURCE" "$DEST")
    if [[ -z "$DRYRUN" ]]; then
      echo "[$NAME] In sync: no differences found"
    else
      echo "[$NAME] OUT OF SYNC – differences detected!"
      echo "$DRYRUN"
    fi

    echo "========== Signature verification for $NAME =========="
    TMPDIR=$(mktemp -d)
    curl -s -L -o "$TMPDIR/manifest" "$MANIFEST"
    curl -s -L -o "$TMPDIR/sig" "$SIG"

    if [ ! -s "$TMPDIR/sig" ]; then
      echo "[$NAME] No valid signature upstream – Not my circus, not my monkeys 🐒"
    else
      if gpg --no-default-keyring --keyring "$KEYRING" \
             --verify "$TMPDIR/sig" "$TMPDIR/manifest" 2>&1; then
        echo "[$NAME] Signature verified successfully ✅"
      else
        echo "[$NAME] Signature verification FAILED ❌ (Upstream problem?)"
      fi
    fi
    rm -rf "$TMPDIR"

    echo "========== AFTER Keyring Trust (fingerprints) for $NAME =========="
    if [ -f "$KEYRING" ]; then
      gpg --no-default-keyring --keyring "$KEYRING" --fingerprint || true
    fi

    END=$(date +%s)
    RUNTIME=$(( (END - START) / 60 ))
    echo "[$NAME] Completed in $RUNTIME minutes"
    echo "========== [$(date)] Done with $NAME =========="

  } >> "$LOG" 2>&1
done