#!/bin/bash
#
# Migrate (mirror) a remote repository
#
# migrate-repo.sh <reponame> <organisation> [<target organisation>]
#
if [[ -z $1 ]] ; then
	echo "git_migrate-repo.sh <reponame> <organisation> [<target organization> <copy|mirror> <local> <debug>]"
	echo "will migrate repo to local user unless <target organisation> specified"
	exit 0
fi

# get config file and params
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-repo.sh <reponame> <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

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

SILENT="-s"
if [ $DEBUG ] ; then SILENT="-v" ; fi

SOURCEHOST=${remote_GITEAHOST}
SOURCEACCESSTOKEN=${remote_GITEAACCESSTOKEN}
TARGETHOST=${local_GITEAHOST}
TARGETACCESSTOKEN=${local_GITEAACCESSTOKEN}
TARGETORG=${local_USER}
MIRROR=false
for param in $2 $3 $4 $5 $6; do
  if [ $param ] ; then
    case $param in
      local )
	    SOURCEHOST=${local_GITEAHOST}
        SOURCEACCESSTOKEN=${local_GITEAACCESSTOKEN}
        CLONEADDRESS=$LOCALGITEAHOST/$2/$1.git
        ;;
      copy )
        MIRROR=false
        ;;
      mirror )
        MIRROR=true ;;
      debug )
        DEBUG=true ;;
      * )
        TARGETORG=$param ;;
    esac
  else
	  break
  fi
done
CLONEADDRESS=$SOURCEHOST/$2/$1.git
if [ $DEBUG ] ; then
    echo "MIRROR=$MIRROR"
    echo "TARGETORG=$TARGETORG"
fi

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

# And check if this repo already exists on the target
if [ $DEBUG ] ; then echo "checking if $TARGETORG/$1 already exists on $TARGETHOST" ; fi
RESPONSE=$(curl $SILENT -o /dev/null -w "%{http_code}" $TARGETHOST/$TARGETORG/$1)
if [ $DEBUG ] ; then echo "RESPONSE=$RESPONSE" ; fi
if [ "$RESPONSE" == "200" ] ; then
	echo "Repository $TARGETORG/$1 already exists on $TARGETHOST - cannot migrate"
	exit 1
fi

DATA=$(cat << EOT
  "auth_token": "$TARGETACCESSTOKEN",
  "clone_addr": "$CLONEADDRESS",
  "issues": true,
  "labels": true,
  "lfs": true,
  "milestones": true,
  "mirror": $MIRROR,
  "private": false,
  "pull_requests": true,
  "releases": true,
  "repo_name": "$1",
  "repo_owner": "$TARGETORG",
  "service": "git",
  "uid": 0,
  "wiki": true
EOT
)
if [ $DEBUG ] ; then echo "JSON DATA=$DATA" ; fi

if [ $DEBUG ] ; then echo "Migrating $2/$1 as $TARGETORG/$1 on $TARGETHOST MIRROR=$MIRROR" ; fi
RESPONSE=$(curl $SILENT -k -X 'POST' \
  "$TARGETHOST/api/v1/repos/migrate" \
  -H 'accept: application/json' \
  -H "Authorization: token $TARGETACCESSTOKEN" \
  -H 'Content-Type: application/json' \
  -d "{ $DATA }"
  )
if [ $DEBUG ] ; then echo $? $RESPONSE ; fi

# And check if this repo is there
if [ $DEBUG ] ; then echo "checking that $TARGETORG/$1 exists" ; fi
RESPONSE=$(curl $SILENT -o /dev/null -w "%{http_code}" $TARGETHOST/$TARGETORG/$1)
if [ $DEBUG ] ; then echo "RESPONSE=$RESPONSE" ; fi
if [ "$RESPONSE" == "200" ] ; then
    msg="Repository $TARGETORG/$1 has been created"
    if [ $MIRROR == "true" ] ; then 
	msg=$msg" and mirrors $2/$1"
    else
	msg=$msg" and is a copy of $2/$1"
    fi
    echo $msg
else
    echo "migrate-repo was unable to migrate $2/$1 sucessfully"
    exit 1
fi