#!/bin/sh -ex

# cd into couchdb directory, run ./replication-ring-continuous.sh N from there
# requires N CouchDB installs running on ports 5985 to 5984 + N

N=$1

if [ -z "$N" ]; then
    echo "usage: ./replication-ring-continuous.sh N"
    exit 1
fi

setup_replication()
{
    # pull replication
    N=$1
    MAX=$2
    TARGET_PORT=`expr 5984 + $N`

    # when we set up 1st couch, we replicate from Nth couch
    if [ $N -eq 1 ]; then
        SOURCE_PORT=`expr 5984 + $MAX`
    else
        SOURCE_PORT=`expr 5984 + $N - 1`
    fi
    TARGET="http://127.0.0.1:$TARGET_PORT"
    SOURCE="http://127.0.0.1:$SOURCE_PORT"

    # create dbs, ignore errors
    curl -X PUT "$SOURCE/db"
    curl -X PUT "$TARGET/db"

    curl -X POST "$TARGET/_replicate" -d "{\"source\":\"$SOURCE/db\",\"target\":\"db\",\"continuous\":true}"
}

MAX=$N
while([ $N -gt 0 ]); do
    echo "Do CouchDB N=$N"
    
    setup_replication $N $MAX

    N=`expr $N - 1`
done

# insert some docs

echo "Done"
# Done