#!/bin/bash
# Default to dry-run mode
DRY_RUN=true
if [[ "$1" == "--run" || "$1" == "-r" ]]; then DRY_RUN=false; fi

if [ "$DRY_RUN" = "true" ]; then
    echo "--- DRY RUN MODE ---"
    echo "To apply changes, run: sudo bash $0 --run"
    echo "--------------------"
fi

# Configuration
BASE="/volume1/docker/gitea"
# Replace with your actual Synology PUID/PGID for the svc-gitea user
# Using 1033 as requested by user
USER_ID="1033:65538" # svc-gitea

# Helper functions
run_mkdir() {
    local path=$1
    if [ -d "$path" ]; then
        echo "[OK] Folder exists, no changes will be made: $path"
    else
        if [ "$DRY_RUN" = "true" ]; then 
            echo "[WILL CREATE] Folder: $path"
        else 
            echo "[EXECUTE] Creating folder: $path"
            mkdir -p "$path"
        fi
    fi
}

run_chown_recursive() {
    local owner=$1; local path=$2
    local uid=${owner%%:*}; local gid=${owner#*:}
    
    # Check if folder exists first
    if [ ! -d "$path" ]; then
        if [ "$DRY_RUN" = "true" ]; then 
            echo "[WILL SET] Owner to $owner upon creation: $path"
        else 
            echo "[EXECUTE] Setting owner to $owner (recursive): $path"
            chown -R "$owner" "$path"
        fi
        return
    fi
    
    # Check if any file/folder inside diverges from the target ownership
    if find "$path" \( ! -uid "$uid" -o ! -gid "$gid" \) | grep -q .; then
        if [ "$DRY_RUN" = "true" ]; then 
            echo "[WILL CHANGE] Owner to $owner (recursive): $path"
        else 
            echo "[EXECUTE] Setting owner to $owner (recursive): $path"
            chown -R "$owner" "$path"
        fi
    else
        echo "[OK] Owner is $owner, no changes will be made: $path"
    fi
}

run_chmod_recursive() {
    local mode=$1; local path=$2
    
    # Check if folder exists first
    if [ ! -d "$path" ]; then
        if [ "$DRY_RUN" = "true" ]; then 
            echo "[WILL SET] Permissions to $mode upon creation: $path"
        else 
            echo "[EXECUTE] Setting permissions to $mode (recursive): $path"
            chmod -R "$mode" "$path"
        fi
        return
    fi
    
    # Check if any file/folder inside diverges from the target permissions
    if find "$path" ! -perm -"$mode" | grep -q .; then
        if [ "$DRY_RUN" = "true" ]; then 
            echo "[WILL CHANGE] Permissions to $mode (recursive): $path"
        else 
            echo "[EXECUTE] Setting permissions to $mode (recursive): $path"
            chmod -R "$mode" "$path"
        fi
    else
        echo "[OK] Permissions are $mode, no changes will be made: $path"
    fi
}

# Run tasks
run_mkdir "${BASE}/data"
run_mkdir "${BASE}/config"
run_chown_recursive "$USER_ID" "${BASE}"
run_chmod_recursive 750 "${BASE}"

if [ "$DRY_RUN" = "false" ]; then
    echo "Done."
fi