#!/bin/bash
# ------------------------------------------------------------------------------------------------
# Script to download, extract, convert, and install the Dell PERCCLI utility.
# Optimized for Debian-based systems (like Proxmox) that need to convert the RPM package.
# Note: This script assumes execution as 'root' (no 'sudo' needed).
# ------------------------------------------------------------------------------------------------

# --- Configuration ---
PERCCLI_URL="https://dl.dell.com/FOLDER13074167M/1/PERCCLI_7.3208.0_Linux_A01.tar.gz"
ARCHIVE_NAME="PERCCLI_7.3208.0_Linux_A01.tar.gz"
TEMP_DIR="perccli_install_temp"
EXECUTABLE_PATH="/opt/MegaRAID/perccli/perccli"
SYMLINK_PATH="/usr/local/bin/perccli"

echo "Starting PERCCLI installation script..."
echo "Target URL: $PERCCLI_URL"

# --- Clean Start Logic: Remove previous temporary files/directories if they exist ---
if [ -d "$TEMP_DIR" ]; then
    echo "Found old temporary directory '$TEMP_DIR'. Removing for a clean start."
    rm -rf "$TEMP_DIR"
fi
if [ -f "$ARCHIVE_NAME" ]; then
    echo "Found old archive '$ARCHIVE_NAME'. Removing for a clean start."
    rm -f "$ARCHIVE_NAME"
fi
# ----------------------------------------------------------------------------------

# 1. Download the archive
echo "1. Downloading $ARCHIVE_NAME..."
# Using wget with User-Agent to prevent 403 errors
wget --no-check-certificate --user-agent="Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1)" "$PERCCLI_URL" -O "$ARCHIVE_NAME"
if [ $? -ne 0 ]; then
    echo "ERROR: Failed to download the file. Check your network connection and ensure 'wget' is installed."
    exit 1
fi
echo "Download complete."

# 2. Extract the archive
echo "2. Extracting the archive..."
mkdir -p "$TEMP_DIR"
tar -xzf "$ARCHIVE_NAME" -C "$TEMP_DIR"
if [ $? -ne 0 ]; then
    echo "ERROR: Failed to extract the archive. The file may be incomplete or corrupted."
    rm -rf "$TEMP_DIR"
    exit 1
fi
echo "Extraction complete to $TEMP_DIR."

# 3. Locate the installation package (Prioritizing RPM since the official package is RPM)
PACKAGE_FILE=$(find "$TEMP_DIR" -type f \( -name "*.rpm" -o -name "*.deb" \) | head -n 1)

if [ -z "$PACKAGE_FILE" ]; then
    echo "ERROR: Could not find any .deb or .rpm installation package within the archive."
    echo "Please navigate to '$TEMP_DIR' and install the appropriate package manually."
    exit 1
fi

echo "3. Found package file: $PACKAGE_FILE"

# 4. Install the package
echo "4. Attempting to install the package."

INSTALL_SUCCESS=1 # Default to failure

if [[ "$PACKAGE_FILE" == *.deb ]]; then
    echo "Detected native DEB package. Trying to install with 'dpkg -i'..."
    if command -v dpkg >/dev/null 2>&1; then
        dpkg -i "$PACKAGE_FILE"
        INSTALL_SUCCESS=$?
    else
        echo "ERROR: 'dpkg' command not found. Cannot proceed."
    fi

elif [[ "$PACKAGE_FILE" == *.rpm ]]; then
    echo "Detected RPM package. As this is a Debian-based system (Proxmox), we will use 'alien' to convert it to a DEB package."

    if command -v dpkg >/dev/null 2>&1; then
        if command -v alien >/dev/null 2>&1; then
            echo "Attempting to convert $PACKAGE_FILE to .deb using 'alien --scripts' to ensure post-install setup runs..."
            # CRITICAL FIX: Use --scripts to prevent skipping post-installation setup
            alien -d --scripts "$PACKAGE_FILE"
            
            if [ $? -eq 0 ]; then
                echo "Conversion successful. Searching for generated .deb file..."
                
                # Robustly search for the .deb file generated by alien
                PACKAGE_NAME_ROOT=$(basename "$PACKAGE_FILE" | cut -d'-' -f1)
                NEW_DEB_FILE=$(find . -maxdepth 1 -name "${PACKAGE_NAME_ROOT}_*.deb" | head -n 1)

                if [ -f "$NEW_DEB_FILE" ]; then
                    echo "Found converted file: $NEW_DEB_FILE. Installing..."
                    # Using dpkg -i to install the generated package
                    dpkg -i "$NEW_DEB_FILE"
                    INSTALL_SUCCESS=$?
                    # Clean up the converted .deb file 
                    rm -f "$NEW_DEB_FILE"
                else
                    echo "ERROR: Conversion succeeded, but could not locate the newly created .deb file for installation."
                fi
            else
                echo "ERROR: 'alien' conversion failed. Please check the 'alien' output above for details."
            fi
        else
            echo "ERROR: 'alien' command not found. This tool is required to convert the RPM package for your system."
            echo "Please run: apt update && apt install alien -y"
        fi
    else
        echo "FATAL ERROR: 'dpkg' (Debian Package Manager) is not found. Cannot proceed with installation."
    fi
fi

# 5. Final Setup and Cleanup
if [ $INSTALL_SUCCESS -eq 0 ]; then
    echo ""
    echo "5. Installation successful. Performing final setup and cleanup."
    
    # CRITICAL FIX: Ensure the executable has permissions (Fixes 'Permission denied')
    if [ -f "$EXECUTABLE_PATH" ]; then
        chmod +x "$EXECUTABLE_PATH"
        echo "Applied execute permission to $EXECUTABLE_PATH."
    fi
    
    # Add symbolic link to the path (Fixes 'command not found')
    if [ ! -L "$SYMLINK_PATH" ]; then
        ln -s "$EXECUTABLE_PATH" "$SYMLINK_PATH"
        echo "Created symbolic link at $SYMLINK_PATH."
    fi

    rm -f "$ARCHIVE_NAME"
    rm -rf "$TEMP_DIR"
    echo "PERCCLI tool is installed and configured. Cleaning up temporary files."
    
    echo "---"
    echo "Verification Command:"
    echo "perccli /c0 show"
    echo "---"
else
    echo ""
    echo "5. Installation failed. The archive '$ARCHIVE_NAME' and temporary directory '$TEMP_DIR' are retained for manual debugging."
    echo "The package file is located at: $PACKAGE_FILE"
fi

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