#!/bin/sh

# This script ensures my `nextcloud` clients operate in a uniform way

set -eu



XDG_DATA_HOME="${XDG_DATA_HOME:-$HOME/.local/share}"

NEXTCLOUD_CFG="${XDG_CONFIG_HOME:-$HOME/.config}/Nextcloud/nextcloud.cfg"
SERVER_URL_FILE="${XDG_CONFIG_HOME:-$HOME/.config}/Nextcloud/server.txt"



if [ -r "$SERVER_URL_FILE" ]; then
    # `tr` strips spaces, tabs, and CR/LF
    SERVER_URL=$(head -n 1 "$SERVER_URL_FILE" | tr -d '[:space:]')
else
    SERVER_URL=""
fi


[ "${1:-}" = "--force" ] && force=1 || force=0

if [ -z "$SERVER_URL" ]; then

    if [ "$force" -eq 1 ]; then

        echo "" >&2
        echo "WARN: No usable server URL at $SERVER_URL_FILE, leaving the server URL unmanaged" >&2
        echo "" >&2

    else

        echo "" >&2
        echo "No usable server URL found at $SERVER_URL_FILE" >&2
        echo "" >&2
        echo "Create it with a single line, e.g., 'https://cloud.example.com'," >&2
        echo "or re-run with --force to skip the URL settings" >&2
        echo "" >&2

        exit 1

    fi

fi



if ! command -v crudini >/dev/null 2>&1; then
    echo "crudini is not installed => cannot configure nextcloud" >&2
    exit 1
fi


if ! command -v nextcloud >/dev/null 2>&1; then
    echo "Nextcloud is not installed" >&2
    exit 1
fi



del_key() {        # section key
    crudini --del "$NEXTCLOUD_CFG" "$1" "$2"
}


set_key() {        # section key value
    crudini --set "$NEXTCLOUD_CFG" "$1" "$2" "$3"
}



# Stop `nextcloud`

nextcloud --quit 2>/dev/null || true

for _ in $(seq 30); do
    pgrep -x nextcloud >/dev/null || break
    sleep 0.5
done

if pgrep -x nextcloud >/dev/null; then
    echo "Nextcloud did not exit; aborting" >&2
    exit 1
fi



mkdir -p "$(dirname "$NEXTCLOUD_CFG")"
touch "$NEXTCLOUD_CFG"



# Configure base settings for `nextcloud`

if [ -n "$SERVER_URL" ]; then
    set_key General forceOverrideServerUrl true
    set_key General overrideServerUrl "$SERVER_URL"
fi

set_key General overrideLocalDir "$HOME/Cloud"

set_key General launchOnSystemStartup true
set_key General monoIcons true
set_key General crashReporter false

# Windows-only, kept for completeness
set_key General showInExplorerNavigationPane true

set_key General optionalServerNotifications false
set_key General showCallNotifications false
set_key General showChatNotifications false

set_key General isVfsEnabled false  # `true` is also not good for `gocryptfs` syncs
set_key General confirmExternalStorage true
set_key General useNewBigFolderSizeLimit false
set_key General newBigFolderSizeLimit 999
set_key General notifyExistingFoldersOverLimit false
set_key General stopSyncingExistingFoldersOverLimit false

set_key General moveToTrash true
set_key General promptDeleteAllFiles true

set_key Proxy type 0


# Make `nextcloud` sync at full speed, with sane fallback limits

# Modes:
#  -  0 => unlimited
#  - -1 => automatic limit
#  - +1 => manually set limit

# Limits:
# - values are in KBytes/s
# - we assume line speeds of 100/30 Mbit/s, to be capped at 80%

set_key BWLimit useDownloadLimit 0
# 100 Mbit/s / 8 => 12500 KBytes/s * 0.8 => 10000
set_key BWLimit downloadLimit 10000

set_key BWLimit useUploadLimit 0
# 30 Mbit/s / 8 => 3750 KBytes/s * 0.8 => 3000
set_key BWLimit uploadLimit 3000


set_key Nextcloud remotePollInterval 60000



# Because of a bug, `nextcloud` wants to create logs at a deprecated location
# => An empty file at that location makes `nextcloud` use the new location
#    inside ~/.config/Nextcloud
rm -rf "$XDG_DATA_HOME/Nextcloud"
touch "$XDG_DATA_HOME/Nextcloud"



# Resume `nextcloud`
setsid nextcloud --background >/dev/null 2>&1 &