#!/bin/bash
#
# Migrate (mirror) a remote repository
#
# migrate-repo.sh <reponame> <organisation> [<traget organisation>]
#
inifilename=$(echo ~)"/.smegit/config"
if [ ! -e $inifilename ] ; then
  # Not here, look at system default
  if [ ! -e /etc/smegit.ini ] ; then 
    echo "No ini file found $inifiename or /etc/smegit.ini"
    echo "git-mirror-org.sh <source organisation> [<target organisation>]"
    exit 1
  else
    initfilename="/etc/smegit.ini"
  fi
fi 

while read -r line || [[ -n "$line" ]]; do
    if [[ $line =~ ^\[.*\]$ ]]
    then
        section=${line#*[}
        section=${section%]*}
    else
        if [[ $line =~ ^[^#]*= ]]
        then
            key=${line%=*}
            value=${line#*=}
            declare "${section}_${key}=$value"
        fi
    fi
done < "$inifilename"

if [[ -z $1 ]] ; then
	echo "migrate-org.sh <source organisation> [<target organisation> <review>]"
	echo "<target organisation> is optional and will default to the gitea user"
  echo "<review> is optional and will echo the changes, but not execute"
	exit 0
fi

DEBUG=
curlsilent="-s"
if [ ${smegit_DEBUG} == true ] ; then DEBUG=true ; fi
if [ $DEBUG ] ; then 
    echo "found ini file: $inifilename" 
    curlsilent="-v"
fi

MIRROR="copy"
TARGETORG=
for $param in $2 $3 $4; do
  if [ $param ] ; then
	  if [[ $param == "copy" || $param == "mirror" ]] ; then
	    MIRROR=$param
    elif [[ $param == "review"]] ; then
      REVIEW=true
	  else
	    TARGETORG=$param
	  fi
  else
	  break
  fi
done

REMOTEACCESSTOKEN=${remote_GITEAACCESSTOKEN}
LOCALACCESSTOKEN=${local_GITEAACCESSTOKEN}
REMOTEGITEAHOST=${remote_GITEAHOST}
LOCALGITEAHOST=${local_GITEAHOST}
if [ $DEBUG ] ; then echo "TARGETORG=$TARGETORG" ; fi

# check that the target organisation exists locally
if [ $DEBUG ] ; then echo "checking that $TARGETORG exists on $LOCALGITEAHOST" ; fi
RESPONSE=$(curl $curlsilent -o /dev/null -w "%{http_code}" $LOCALGITEAHOST/$TARGETORG)
if [ $DEBUG ] ; then echo "RESPONSE=$RESPONSE" ; fi
if [[ "$RESPONSE" != "200" ]] ; then
    echo "$TARGETORG does not exist on $LOCALGITEAHOST"
    exit 1
fi 

if [[ ! $REVIEW ]] ; then
	while true; do
		read -p "Are you sure?(y/n) " yn
		case $yn in
			[Yy]* ) break;;
			[Nn]* ) exit;;
			* ) echo "Please answer yes or no.";;
		esac
	done
fi

# get a list of repositories in the source organisation
for page in {1..10} ; do
  if [ $DEBUG ] ; then echo "getting page $page of repos from $REMOTEGITHOST $1" ; fi
  RESPONSE=$(curl $curlsilent -X 'GET' \
    "$REMOTEGITEAHOST/api/v1/orgs/$1/repos?page=$page" \
    -H 'accept: application/json' \
    -H "Authorization: token $REMOTEACCESSTOKEN"
  )
  if [ $DEBUG ] ; then echo "RESPONSE=$RESPONSE" ; fi

  if [[ $RESPONSE == '[]' ]] ; then
    # we have them all
	  break
  else
    echo $RESPONSE | grep -oP '(?<="name":").+?(?=")' | while read repo; do
      if [ $DEBUG ] ; then echo "git-migrate-repo.sh ${repo} $1 $TARGETORG $MIRROR" ; fi
        if [[ $REVIEW ]] ; then
          echo "git-migrate-repo.sh ${repo} $1 $TARGETORG $MIRROR"
        else
          git-migrate-repo.sh ${repo} $1 $TARGETORG $MIRROR
        fi
    done
  fi
done