#!/usr/bin/env bash

: ${IPFS_VER="0.8.0"}

tmpx="$(mktemp -d)"

ipfs_service() {
    cat <<EOF
# This file will be overwritten on package upgrades, avoid customizations here.
#
# To make persistant changes, create file in
# "/etc/systemd/system/ipfs.service.d/overwrite.conf" with
# 'systemctl edit ipfs.service'. This file will be parsed after this
# file has been parsed.
#
# To overwrite a variable, like ExecStart you have to specify it once
# blank and a second time with a new value, like:
# ExecStart=
# ExecStart=/usr/bin/ipfs daemon --flag1 --flag2
#
# For more info about custom unit files see systemd.unit(5).

[Unit]
Description=InterPlanetary File System (IPFS) daemon
Documentation=https://docs.ipfs.io/
After=network.target

[Service]

# enable for 1-1024 port listening
AmbientCapabilities=CAP_NET_BIND_SERVICE
# enable to specify a custom path see docs/environment-variables.md for further documentations
#Environment=IPFS_PATH=/custom/ipfs/path
# enable to specify a higher limit for open files/connections
#LimitNOFILE=1000000

#don't use swap
MemorySwapMax=0

Type=notify
User=ipfs
Group=ipfs
StateDirectory=ipfs
Environment=IPFS_PATH="${IPFS_DATADIR}"
ExecStart=/usr/bin/ipfs daemon --init --migrate
Restart=on-failure
KillSignal=SIGINT

[Install]
WantedBy=default.target

EOF

}

ipfs_cluster_service() {
    cat <<EOF
# This file will be overwritten on package upgrades, avoid customizations here.
#
# To make persistant changes, create file in
# "/etc/systemd/system/ipfs.service.d/overwrite.conf" with
# 'systemctl edit ipfs.service'. This file will be parsed after this
# file has been parsed.
#
# To overwrite a variable, like ExecStart you have to specify it once
# blank and a second time with a new value, like:
# ExecStart=
# ExecStart=/usr/bin/ipfs daemon --flag1 --flag2
#
# For more info about custom unit files see systemd.unit(5).

[Unit]
Description=IPFS Cluster Daemon
Documentation=https://docs.ipfs.io/
After=ipfs.service

[Service]

# enable for 1-1024 port listening
AmbientCapabilities=CAP_NET_BIND_SERVICE
# enable to specify a higher limit for open files/connections
LimitNOFILE=1000000

#don't use swap
MemorySwapMax=0

Type=simple
User=ipfs
Group=ipfs
StateDirectory=ipfs
Environment=IPFS_PATH="${IPFS_DATADIR}"
ExecStart=/usr/bin/ipfs-cluster-service daemon
Restart=on-failure
KillSignal=SIGINT

[Install]
WantedBy=default.target

EOF

}

: ${IPFS_CLUSTER_URL="http://dist.ipfs.io/ipfs-cluster-service/v0.13.1/ipfs-cluster-service_v0.13.1_linux-amd64.tar.gz"}
: ${IPFS_FOLLOW_URL="https://dist.ipfs.io/ipfs-cluster-follow/v0.13.1/ipfs-cluster-follow_v0.13.1_linux-amd64.tar.gz"}
: ${IPFS_CTL_URL="https://dist.ipfs.io/ipfs-cluster-ctl/v0.13.1/ipfs-cluster-ctl_v0.13.1_linux-amd64.tar.gz"}
: ${IPFS_DATADIR="/data-ipfs"}

cd "$tmpx"

echo "downloading + extracting go-ipfs.tar.gz"
curl -fsSL "https://dist.ipfs.io/go-ipfs/v${IPFS_VER}/go-ipfs_v${IPFS_VER}_linux-amd64.tar.gz" | tar xvzf -

echo "downloading + extracting ipfs cluster service"
curl -fsSL "$IPFS_CLUSTER_URL" | tar xvzf - 
echo "downloading + extracting ipfs cluster ctl"
curl -fsSL "$IPFS_CTL_URL" | tar xvzf - 
echo "downloading + extracting ipfs cluster follow"
curl -fsSL "$IPFS_FOLLOW_URL" | tar xvzf - 


sudo() {
    if (( EUID == 0 )); then
        "$@"
        return $?
    fi
    if command -v sudo; then
        env -- sudo "$@"
    elif command -v su; then
        su -c "$*"
    else
        >&2 echo -e " [!!!] sudo and su not available. cannot execute cmd: $*"
        return 1
    fi
}
   

[[ -f /usr/bin/ipfs ]] && echo "removing /usr/bin/ipfs (sudo)" && sudo rm -v /usr/bin/ipfs
echo "installing ipfs using sudo - to /usr/bin/ipfs"
sudo install -v "$tmpx/go-ipfs/ipfs" /usr/bin/ipfs
echo "installing ipfs-cluster-service using sudo - to /usr/bin/ipfs-cluster-service"
sudo install -v "$tmpx/ipfs-cluster-service/ipfs-cluster-service" /usr/bin/
echo "installing ipfs-cluster-ctl using sudo - to /usr/bin/ipfs-cluster-ctl"
sudo install -v "$tmpx/ipfs-cluster-ctl/ipfs-cluster-ctl" /usr/bin/
echo "installing ipfs-cluster-follow using sudo - to /usr/bin/ipfs-cluster-follow"
sudo install -v "$tmpx/ipfs-cluster-follow/ipfs-cluster-follow" /usr/bin/

if ! grep -Eq "^ipfs" /etc/passwd; then
    echo -e " >>> creating user: ipfs"
    sudo adduser --gecos "" --disabled-password ipfs
    echo "adding export IPFS_PATH=${IPFS_DATADIR} to .profile bashrc and zshrc for ipfs user"
    echo "export IPFS_PATH=\"${IPFS_DATADIR}\"" | sudo tee -a "/home/ipfs/.bashrc"
    echo "export IPFS_PATH=\"${IPFS_DATADIR}\"" | sudo tee -a "/home/ipfs/.profile"
    echo "export IPFS_PATH=\"${IPFS_DATADIR}\"" | sudo tee -a "/home/ipfs/.zshrc"
fi

echo "adding export IPFS_PATH=${IPFS_DATADIR} to .bashrc"
echo "export IPFS_PATH=\"${IPFS_DATADIR}\"" | tee -a "${HOME}/.bashrc"
echo "adding export IPFS_PATH=${IPFS_DATADIR} to .zshrc"
echo "export IPFS_PATH=\"${IPFS_DATADIR}\"" | tee -a "${HOME}/.zshrc"
echo "adding export IPFS_PATH=${IPFS_DATADIR} to .profile"
echo "export IPFS_PATH=\"${IPFS_DATADIR}\"" | tee -a "${HOME}/.profile"

#sudo su -c "bash -c 'IPFS_PATH=\"${IPFS_DATADIR}\" ipfs init --profile server'" ipfs

echo -e " >>> creating ipfs.service"
ipfs_service | sudo tee /etc/systemd/system/ipfs.service

echo -e " >>> creating ipfs-cluster.service"
ipfs_cluster_service | sudo tee /etc/systemd/system/ipfs-cluster.service
echo -e " >>> reloading systemd"
sudo systemctl dameon-reload
echo -e " >>> enabling ipfs.service"
sudo systemctl enable ipfs

echo -e " !!! ready - please create and mount the dir: $IPFS_DATADIR !!!"
echo -e " !!! once $IPFS_DATADIR is ready, do: \n"

echo -e "     sudo su -c \"bash -c 'IPFS_PATH=\"${IPFS_DATADIR}\" ipfs init --profile server'\" ipfs"
echo -e "     systemctl restart ipfs"
echo -e "\n\n"
cd -