#!/bin/sh -x
#
# 01. "should check code directly not $?"
# shellcheck disable=2181
#
# 02. "can't follow . import"
# shellcheck disable=1090,1091
#
# 03. "possible misspelling"
# shellcheck disable=2153
#
# 04. "use find .. over ls"
# shellcheck disable=2011
# -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

# ===================================================
# 01. Attempt to load global DayZ values
# ===================================================
echo "Starting, attempting to load globals.sh"

GLOBALS_FILE="$PWD/lib/globals.sh"
if [ -e "$GLOBALS_FILE" ] ; then
    chmod +x "$GLOBALS_FILE"
    . "$GLOBALS_FILE"
else
    die "Could not load: $GLOBALS_FILE"
fi

# ===================================================
# 02. Local script variables
# ===================================================
#
#
# Local server file hierarchy:
#
#     c:/DAYZ
#         ^--/servers
#         ^--/cache
#
export ORIGINAL_DIR="$PWD"
export LOCAL_DAYZ_FILES="/mnt/c/DAYZ"
export CACHE="$LOCAL_DAYZ_FILES/cache"
export STOCK_SERVER_CACHE="$CACHE/stock_server"
export MOD_CACHE="$CACHE/mods"
export SERVERS="$LOCAL_DAYZ_FILES/servers"
# (4 hours, in seconds)
export RESTART_INTERVAL=$((60 * 60 * 4 + 3))

# ===================================================
# 03. init and checks
# ===================================================
check() {
    if [ ! -d "$LOCAL_DAYZ_FILES" ] ; then
        die "dir: $LOCAL_DAYZ_FILES does not exist"
    fi
    if [ ! -d "$SERVER_HOME" ] ; then
        die "dir: $SERVER_HOME does not exist"
    fi

    msg "Health checks completed successfully."
}

init_server() {
    mkdir -p "$SERVER_HOME" "$CACHE" "$MOD_CACHE" "$STOCK_SERVER_CACHE"
    :>"$SERVER_HOME/.modstring"

    check || die "Failed check()"

    msg "Completed intialization. Using server restart time of $RESTART_INTERVAL seconds."
}

# ===================================================
# 04. Load stock files
# ===================================================
# load_stock_map_data() {
#     mkdir -p "$SERVER_HOME/mpmissions/$MAP_FOLDER_NAME"
#     do_sync --exclude='*storage_1*' \
#         "$DAYZ_FILES/stock/maps/$MAP_FOLDER_NAME"/ \
#         "$SERVER_HOME/mpmissions/$MAP_FOLDER_NAME" || \
#         die "Failed to copy stock map data"
# }

refresh_local_cache() {
    msg "Refreshing local stock server cache"
    if ! islocked_remote_server ; then
        load_stock_map_data
        do_sync "$REMOTE_STOCK_SERVER"/ "$STOCK_SERVER_CACHE"
        unlock_remote_server
    else
        msg "Remote server is locked, sleeping..."
        while islocked_remote_server ; do
            sleep 15
            echo 'Sleeping...'
        done
        lock_remote_server
        do_sync "$REMOTE_STOCK_SERVER"/ "$STOCK_SERVER_CACHE"
        unlock_remote_server
    fi
    msg "Stock server data copied into local server cache!"

    # -------------------------------------

    msg "Refreshing local mods cache"
    if ! islocked_remote_server ; then
        lock_remote_server
        do_sync "$REMOTE_MODS"/ "$MOD_CACHE"
        unlock_remote_server
    else
        msg "Remote server is locked, sleeping..."
        while islocked_remote_server ; do
            sleep 15
            echo 'Sleeping...'
        done
        lock_remote_server
        do_sync "$REMOTE_MODS"/ "$MOD_CACHE"
        unlock_remote_server
    fi
    msg "Mods data copied into local mod cache!"
}

setup_environment() {
    msg "Copying stock server data from local cache into $SERVER_HOME"
    # list of all stock server folders
    for folder in addons battleye bliss docs dta keys ; do
        do_sync "$STOCK_SERVER_CACHE/$folder"/ "$SERVER_HOME/$folder" || die "Failed to copy stock: $folder"
    done
    # list of all stock server files
    for file in ban.txt dayz.gproj dayzsetting.xml whitelist.txt \
                DayZServer_x64.exe steam_api64.dll steamclient64.dll \
                tier0_s64.dll vstdlib_s64.dll ; do
        cp -fv "$STOCK_SERVER_CACHE/$file" "$SERVER_HOME/$file" || die "Failed to copy stock: $file"
    done

    msg "Copying mod files from local cache into $SERVER_HOME"
    do_sync "$MOD_CACHE/$MAP_FOLDER_NAME"/ "$SERVER_HOME/mods" || die "Failed to copy mods to $SERVER_HOME"

    # ~~~~~~~~~~~~~~~~~~~~~~~~~~ TODO: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    # msg "Copying DZSA executable"
    # cp -f "$DAYZ_FILES/software/DZSALModServer.exe" "$SERVER_HOME/"
    # ~~~~~~~~~~~~~~~~~~~~~~~~~~ TODO: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
}

# ===================================================
# 05. Start function
# ===================================================
start_server() {
    check || die "Failed check()"

    # wait until dayz-modserver lockfile is released on the NAS
    if islocked_remote_server ; then
        msg "Remote file server is currently locked"
        msg "Sleeping until is no longer locked..."
        while islocked_remote_server ; do
            echo "Sleeping..."
            sleep 10
        done
        msg "Server unlocked! Continuing..."
    fi

    cd "$SERVER_HOME" || die "Could not cd to '$SERVER_HOME'"

    msg "Setting up environment"
    setup_environment || die "Could not set up environment."
}

# ===================================================
# 06. Main loop
# ===================================================
main() {
    cd "$ORIGINAL_DIR" || die "Can no longer cd to $ORIGINAL_DIR"

    if [ -e ./SERVER.ENV ] ; then
        . ./SERVER.ENV
    else
        die "Could not source ./SERVER.ENV"
    fi

    # this must be here and not up top as we must load it from the SERVER.ENV
    export SERVER_HOME="$SERVERS/$SERVER_NAME"

    # create directories in $SERVER_HOME
    # blank the modstring
    init_server

    if [ -e ./serverDZ.cfg ] ; then
        cp -f ./serverDZ.cfg "$SERVER_HOME"/ || die "Failed to copy ./serverDZ into $SERVER_HOME"
    else
        die "Could not find ./serverDZ.cfg"
    fi

    # sync remote server stock and mod files into local cache
    refresh_local_cache || die "Failed to refresh local cache."

    # load stock server, map, mod files into $SERVER_HOME
    setup_environment || die "Failed to setup environment."

    start_server "$@"
}

main "$@" || exit 1