#!/bin/bash

# Output file
output_file="$HOME/.config/hypr/conf/env.conf"

# Well-known environment variables to skip
skip_vars="HOME"

# Define the output file
output_file="$HOME/.config/hypr/conf/env.conf"

# Write Info into file
echo -e "# This file was imported from envvars config in .config .\n# Don't edit this file! This file would be override by import-env script.\n" > "$output_file"

# Temporary associative array to store referenced variables
declare -A var_references

# Process each .conf file in the directory
for conf_file in ~/.config/environment.d/*.conf; do
    while IFS= read -r line || [ -n "$line" ]; do
        # Preserve comments
        if [[ $line =~ ^#.* ]]; then
            echo "$line" >> "$output_file"
            continue
        fi

        # Handle variable definitions, skipping lines without '='
        if [[ $line =~ ^([A-Za-z_][A-Za-z0-9_]*)=(.*)$ ]]; then
            key="${BASH_REMATCH[1]}"
            value="${BASH_REMATCH[2]}"

            # Check if the value references another variable
            if [[ $value =~ \$(\{?[A-Za-z_][A-Za-z0-9_]*\}?) ]]; then
                var_name="${BASH_REMATCH[1]}"
                var_name="${var_name//\{\}/}"

                # If the referenced variable is not in the skip list, add to references
                if ! [[ $skip_vars =~ $var_name ]]; then
                    if [[ -z ${var_references[$var_name]} ]]; then
                        var_ref_value=$(eval echo \$$var_name)
                        echo "\$$var_name=$var_ref_value" >> "$output_file"
                        var_references[$var_name]=$var_ref_value
                    fi
                fi
            fi

            # Write the environment variable in the desired format
            echo "env=${key},${value}" >> "$output_file"
        fi
    done < "$conf_file"
done

echo "Merged environment variables written to $output_file"