#!/bin/bash

# Define the variables we are looking for
VARS=("EPROG" "ESP_DEBUG" "ESP_SENSOR" "I2C_EMULATOR")

echo "------------------------------------------------"
echo "🔍 Starting ESP Hardware Verification..."
echo "------------------------------------------------"

FAILED=0

for VAR_NAME in "${VARS[@]}"; do
    # 1. Check if Environment Variable exists
    PORT_PATH="${!VAR_NAME}"
    
    if [ -z "$PORT_PATH" ]; then
        echo "❌ [ERROR]: \$$VAR_NAME is not set in environment."
        FAILED=1
        continue
    fi

    # 2. Check if the device node exists
    if [ -e "$PORT_PATH" ]; then
        # 3. Check for Read/Write permissions
        if [ -r "$PORT_PATH" ] && [ -w "$PORT_PATH" ]; then
            TARGET=$(readlink -f "$PORT_PATH")
            echo "✅ [OK]: $VAR_NAME is active at $PORT_PATH -> ($TARGET)"
        else
            echo "⚠️  [PERM]: $VAR_NAME found at $PORT_PATH but NO R/W PERMISSION!"
            echo "    Run: sudo chmod 666 $PORT_PATH"
            FAILED=1
        fi
    else
        echo "❌ [MISSING]: $VAR_NAME ($PORT_PATH) is NOT connected."
        FAILED=1
    fi
done

echo "------------------------------------------------"
if [ $FAILED -eq 0 ]; then
    echo "🚀 ALL SYSTEMS GO: Ready for automation."
    exit 0
else
    echo "🛑 STOP: Please fix the errors above before running tests."
    exit 1
fi