#!/bin/bash
# Zomboid World Reset Script
# Triggered by systemd path unit when discord bot requests reset

set -e

LOGFILE="{{ podman_home }}/.local/share/volumes/zomboid/logs/world-reset.log"
TRIGGER_FILE="{{ podman_home }}/.local/share/volumes/gregtime/data/zomboid-reset.trigger"
SERVER_NAME="{{ zomboid_server_name }}"
SAVES_PATH="{{ podman_home }}/.local/share/volumes/zomboid/data/Saves/Multiplayer/${SERVER_NAME}"
DB_PATH="{{ podman_home }}/.local/share/volumes/zomboid/data/db/${SERVER_NAME}.db"

log() {
    local msg="[$(date '+%Y-%m-%d %H:%M:%S')] $1"
    echo "$msg"
    # stdout is already captured by the journal; the file is a convenience.
    # Never let it be fatal -- an unwritable log used to abort the whole wipe
    # on the very first line, under set -e.
    echo "$msg" >> "$LOGFILE" 2>/dev/null || true
}

# Ensure XDG_RUNTIME_DIR is set for systemctl --user
export XDG_RUNTIME_DIR="/run/user/$(id -u)"

log "World reset triggered"

# Read requester info from trigger file if available
# Note: Must use podman unshare because file is owned by container's UID (232071)
if podman unshare test -f "$TRIGGER_FILE"; then
    REQUESTER=$(podman unshare cat "$TRIGGER_FILE")
    log "Requested by: $REQUESTER"
    podman unshare rm -f "$TRIGGER_FILE"
fi

# Stop server
log "Stopping zomboid service..."
systemctl --user stop zomboid.service || true
sleep 5

# Delete world (using podman unshare to work within user namespace)
log "Deleting world saves at: $SAVES_PATH"
if [[ -d "$SAVES_PATH" ]]; then
    podman unshare rm -rf "$SAVES_PATH"
    log "World saves deleted"
else
    log "No world saves found at $SAVES_PATH"
fi

# Delete player database
log "Deleting player database at: $DB_PATH"
if [[ -f "$DB_PATH" ]]; then
    podman unshare rm -f "$DB_PATH"
    log "Player database deleted"
else
    log "No database found at $DB_PATH"
fi

# Restore the intended world settings before the server regenerates.
#
# Without this the wipe silently changes the game. PZ writes the running world's
# settings back over Server/<name>_SandboxVars.lua, so by the time we delete the
# save that file already describes the world we are throwing away -- and if that
# world had defaults, the replacement inherits them. Restoring from the canonical
# copy is what makes a wipe reset the world and keep the settings.
CONFIG_TEMPLATE="{{ podman_home }}/.local/share/volumes/zomboid/config-template"
SERVER_DIR="{{ podman_home }}/.local/share/volumes/zomboid/data/Server"
for f in SandboxVars spawnregions spawnpoints; do
    if [[ -f "${CONFIG_TEMPLATE}/${f}.lua" ]]; then
        podman unshare cp "${CONFIG_TEMPLATE}/${f}.lua" "${SERVER_DIR}/${SERVER_NAME}_${f}.lua"
        log "Restored ${SERVER_NAME}_${f}.lua from canonical config"
    else
        log "WARNING: no canonical ${f}.lua; the new world will inherit whatever the server last wrote"
    fi
done

# Start server
log "Starting zomboid service..."
systemctl --user start zomboid.service

log "World reset complete - new world will generate on first connection"