#!/usr/bin/env bash
# @file .local/bin/gitomatic-service
# @brief Helper script to run gitomatic to monitor git repositories
# @description
#     This script is executed by gitomatic systemd service. `gitomatic` does not support monitoring multiple
#     repositories in a single process. This script starts as many gitomatic processes as there are repositories.
#
#     This feature allows you to specify git repositories and corresponding paths to keep in-sync, using both git
#     push and pull.
#
#     ## Links
#
#     [Systemd Unit file](https://github.com/megabyte-labs/install.doctor/blob/master/home/dot_config/gitomatic/gitomatic.service.tmpl)

if command -v gitomatic > /dev/null && command -v jq > /dev/null && command -v yq > /dev/null && command -v git > /dev/null; then
  if [ -d /Applications ] && [ -d /System ]; then
    USER_FOLDER="/Users"
  else
    USER_FOLDER="/home"
  fi

  ### Cycle through user folder chezmoi.yaml configurations
  while read FOLDER; do
    USER_FROM_FOLDER="$(echo "$FOLDER" | sed 's/\/\(.*\)$/\1/')"
    CHEZMOI_YAML="$USER_FOLDER/$USER_FROM_FOLDER/.config/chezmoi/chezmoi.yaml"
    if [ -f "$CHEZMOI_YAML" ]; then
      for IM in $(yq eval -o=j "$CHEZMOI_YAML" | jq -cr '.data.user.gitomatic[]'); do
        GIT="$(echo "$IM" | jq -r '.git' -)"
        GIT_PATH="$(echo "$IM" | jq -r '.path' -)"
        if [ ! -d "$GIT_PATH" ]; then
          sudo su - "$USER_FROM_FOLDER" -c 'git clone "$GIT" "$GIT_PATH"'
        fi
        cd "$GIT_PATH"
        sudo su - "$USER_FROM_FOLDER" -c 'gitomatic -email "$(git config user.email)" "$GIT_PATH" &'
      done
    fi
  done < <(find "$USER_FOLDER" -mindepth 1 -maxdepth 1 -type d)

  ### Handle root user config
  if [ -f /root/.config/chezmoi/chezmoi.yaml ]; then
    for IM in $(yq eval -o=j /root/.config/chezmoi.chezmoi.yaml | jq -cr '.data.user.gitomatic[]'); do
      GIT="$(echo "$IM" | jq -r '.git' -)"
      GIT_PATH="$(echo "$IM" | jq -r '.path' -)"
      if [ ! -d "$GIT_PATH" ]; then
        git clone "$GIT" "$GIT_PATH"
      fi
      cd "$GIT_PATH"
      gitomatic -email "$(git config user.email)" "$GIT_PATH" &
    done
  fi
else
  echo 'gitomatic, jq, yq, and git should be installed!' && exit 1
fi