#!/bin/bash
#
# cosmic-move.sh - Move a batch of cosmic-*_cosmic.txz packages (and their
# .asc / .md5 sidecars) out of the live repo directory into a version-named
# archive directory. Only packages whose filename starts with "cosmic-" are
# moved (e.g. "just" and "launcher" are left alone). Unlike the old hardcoded
# version of this script, the target version is auto-detected (from
# cosmic-comp) or can be supplied explicitly, so this works for any COSMIC
# release without editing the file.
#
# Usage:
#   cosmic-move.sh [-s SRC_DIR] [-d DEST_BASE] [-n] [VERSION]
#
#   -s SRC_DIR    Directory containing the cosmic-*_cosmic.txz packages
#                 (default: current directory)
#   -d DEST_BASE  Base directory under which the version dir is created
#                 (default: same as SRC_DIR)
#   -n            Dry run - show what would happen, move nothing
#   VERSION       Optional. If omitted, the version is auto-detected from
#                 the cosmic-comp-*.txz package found in SRC_DIR.
#
# Examples:
#   ./cosmic-move.sh
#       -> auto-detects version from cosmic-comp-*.txz in ./, moves
#          everything into ./<version>/
#
#   ./cosmic-move.sh -s /opt/htdocs/mirror/slackware/cosmic -d /opt/htdocs/mirror/slackware/cosmic/old
#       -> auto-detects version, moves into
#          /opt/htdocs/mirror/slackware/cosmic/old/<version>/
#
#   ./cosmic-move.sh -n 1.4.0
#       -> dry run, force version 1.4.0 instead of auto-detecting
#
set -euo pipefail

SRC_DIR="."
DEST_BASE=""
DRY_RUN=0
VERSION=""

usage() {
    grep '^#' "$0" | sed -n '2,29p' | sed 's/^#//'
    exit 1
}

while getopts ":s:d:nh" opt; do
    case "$opt" in
        s) SRC_DIR="$OPTARG" ;;
        d) DEST_BASE="$OPTARG" ;;
        n) DRY_RUN=1 ;;
        h) usage ;;
        \?) echo "Unknown option: -$OPTARG" >&2; usage ;;
        :)  echo "Option -$OPTARG requires an argument" >&2; usage ;;
    esac
done
shift $((OPTIND - 1))

# Optional positional VERSION argument overrides auto-detection
if [ $# -ge 1 ]; then
    VERSION="$1"
fi

SRC_DIR="${SRC_DIR%/}"
[ -z "$DEST_BASE" ] && DEST_BASE="$SRC_DIR"
DEST_BASE="${DEST_BASE%/}"

if [ ! -d "$SRC_DIR" ]; then
    echo "Error: source directory '$SRC_DIR' does not exist" >&2
    exit 1
fi

# --- Auto-detect version from cosmic-comp if not supplied ------------------
if [ -z "$VERSION" ]; then
    comp_pkg=$(find "$SRC_DIR" -maxdepth 1 -name 'cosmic-comp-*_cosmic.txz' | sort -V | tail -n1)
    if [ -z "$comp_pkg" ]; then
        echo "Error: no VERSION given and no cosmic-comp-*_cosmic.txz found in '$SRC_DIR' to auto-detect from." >&2
        echo "Pass a version explicitly, e.g.: $0 1.4.0" >&2
        exit 1
    fi
    base=$(basename "$comp_pkg")
    # cosmic-comp-1.4.0-x86_64-1_cosmic.txz -> 1.4.0
    if [[ "$base" =~ -([0-9]+\.[0-9]+\.[0-9]+)-(x86_64|noarch|i586|i686)-[0-9]+_cosmic\.txz$ ]]; then
        VERSION="${BASH_REMATCH[1]}"
    else
        echo "Error: could not parse version out of '$base'" >&2
        exit 1
    fi
    echo "Auto-detected COSMIC version: $VERSION (from $base)"
fi

DEST_DIR="$DEST_BASE/$VERSION"

echo "Source:      $SRC_DIR"
echo "Destination: $DEST_DIR"
[ "$DRY_RUN" -eq 1 ] && echo "Mode:        DRY RUN (nothing will be moved)"
echo

if [ "$DRY_RUN" -eq 0 ]; then
    mkdir -p "$DEST_DIR"
fi

shopt -s nullglob
moved=0

for pkg in "$SRC_DIR"/cosmic-*_cosmic.txz; do
    fname=$(basename "$pkg")

    # Skip packages that aren't versioned like X.Y.Z (e.g. date-stamped
    # builds such as 20250110.4528864) - those aren't part of a normal
    # COSMIC release and shouldn't be swept into the version directory.
    if ! [[ "$fname" =~ -[0-9]+\.[0-9]+\.[0-9]+-(x86_64|noarch|i586|i686)-[0-9]+_cosmic\.txz$ ]]; then
        echo "skipping (non-standard version): $fname"
        continue
    fi

    if [ "$DRY_RUN" -eq 1 ]; then
        echo "would move: $fname"
    else
        mv -v "$pkg" "$DEST_DIR/"
    fi
    moved=$((moved + 1))

    # Move matching sidecar files (signature / checksum) if present
    for ext in asc md5 meta lst txt; do
        side="$SRC_DIR/${fname}.${ext}"
        if [ -f "$side" ]; then
            if [ "$DRY_RUN" -eq 1 ]; then
                echo "would move: $(basename "$side")"
            else
                mv -v "$side" "$DEST_DIR/"
            fi
        fi
    done
done
shopt -u nullglob

if [ "$moved" -eq 0 ]; then
    echo "No cosmic-*_cosmic.txz packages found in '$SRC_DIR' - nothing to do."
    exit 0
fi

echo
echo "Done. $moved package(s) $( [ "$DRY_RUN" -eq 1 ] && echo 'would be moved' || echo 'moved' ) to $DEST_DIR"