#!/usr/bin/env bash

# Function to create symlink for snapshots
create_symlink() {
  local osname="$1"
  local release="$2"
  local repository="$3"
  local basepath="$4"
  local label="$5" # 'monthly', 'weekly', or 'daily'
  local date_format="$6" # Date format for finding the snapshot

  # The path where snapshots are stored
  local snap_path="${basepath}/snap/${osname}/${release}/${repository}-${date_format}"

  # The target path for the symlink
  local symlink_target="${basepath}/snap/${osname}/${release}/${repository}-${label}"

  # Check if the source directory exists
  if [[ -d "$snap_path" ]]; then
    # Create the symlink, overwrite if it already exists
    ln -sfn "$snap_path" "$symlink_target"
    echo "Symlink created for $snap_path -> $symlink_target"
  else
    echo "Snapshot path does not exist: $snap_path"
    return 1
  fi
}

# Determine which snapshot to promote based on the passed argument
case "$1" in
  monthly)
    promote_date=$(date --date="$(date +%Y%m01) -1 month" +%Y%m%d)
    ;;
  weekly)
    promote_date=$(date --date="last Sunday" +%Y%m%d)
    ;;
  daily)
    promote_date=$(date --date="yesterday" +%Y%m%d)
    ;;
  *)
    echo "Usage: $0 {monthly|weekly|daily}"
    exit 1
    ;;
esac

# Call the function with appropriate arguments
# Iterate over the repositories to create symlinks for each
for conf in /etc/reposync/conf.d/*.conf; do
  source "$conf"

  # Create symlink based on the provided argument
  create_symlink "$OSNAME" "$RELEASE" "$REPOSITORY" "$BASEPATH" "$1" "$promote_date"
done