#!/usr/bin/env bash

set -euf -o pipefail

curp="$(cd "$(dirname "$0")" && pwd)"

bb_projects() {
  # get all projects
  curl --silent \
    -u ${BB_ADMIN_USERNAME}:${SRC_TOKEN} \
    "${BB_SERVER_URL}/rest/api/1.0/projects/" |
    jq -r '.values[] | .key' |
    tr '[:upper:]' '[:lower:]'
}
bb_repos() {
  [ -z "$1" ] && return
  # by project
  curl --silent \
    -u ${BB_ADMIN_USERNAME}:${SRC_TOKEN} \
    "${BB_SERVER_URL}/rest/api/1.0/projects/$1/repos/" |
    jq -r '.values[].name' |
    tr '[:upper:]' '[:lower:]'
}

# unset all GITEA_* variables
unset "${!GITEA_@}"

[ -f "$curp/init.sh" ] && source "$curp/init.sh"

[ -z "${SRC_TOKEN}" ] && {
  echo "SRC_TOKEN is empty" 1>&2
  exit 1
}

: ${BB_ADMIN_USERNAME:=$USER}
: ${BB_ADMIN_PASSWORD:=}

ARGS=()
pos_arg_flag=0
while [[ $# -gt 0 ]]; do
  if [ "${pos_arg_flag}" -eq "1" ]; then
    ARGS+=("$1")
    shift 1
    continue
  fi
  case "$1" in
  --url | -u)
    BB_SERVER_URL="$2"
    shift 2
    ;;
  --token | -t)
    SRC_TOKEN="$2"
    shift 2
    ;;
  --admin | -a)
    BB_ADMIN_USERNAME="$2"
    shift 2
    ;;
  --password | -p)
    BB_ADMIN_PASSWORD="$2"
    shift 2
    ;;
  --pushurl | -s)
    BB_SERVER_PUSH_URL="$2"
    shift 2
    ;;
  --)
    pos_arg_flag=1
    shift 1
    ;;
  --*=*)
    set -- "$(cat - <<<"$1" | cut -d '=' -f1)" "$(cat - <<<"$1" | cut -d '=' -f2-)" "${@:3}"
    ;;
  *)
    ARGS+=("$1")
    shift 1
    ;;
  esac
done

[ -z "${BB_SERVER_PUSH_URL}" ] &&
  BB_SERVER_PUSH_URL="$(echo "${BB_SERVER_URL}" | perl -pe "s#(https?://)#\${1}${BB_ADMIN_USERNAME}:${BB_ADMIN_PASSWORD}@#")/scm/"

# mirror all remote repos and get changes
for prj in $(bb projects); do
  for repo in $(bb repo "$prj"); do
    if [ -d "$curp/$prj/$repo" ]; then
      (
        cd "$curp/$prj/$repo"
        git remote update
      )
    else
      git clone --mirror "${BB_SERVER_PUSH_URL}/$prj/$repo" "$prj/$repo"
    fi
  done
done

# migrate all repos to gitea
"$curp/../migrate.sh" "$@"