feat: implement config management flags

- Add `--get-config` to print the current configuration.

- Add `--set-config` to update specific configuration keys in the TOML file.

- Add `--reset-config` to restore the default configuration.

- Refactor `do_install` to use the new `write_default_config` function.

- Update `--help` text to document the new configuration management flags.

color-tool

@@ -23,6 +23,7 @@ set -euo pipefail
 # Resolve the real directory of this script so we can find bundled helpers
 SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
 CONFIG_FILE="$HOME/.config/color-tool/config.toml"
+REPO_URL="https://git.rootiest.dev/rootiest/color-tool"
 
 # ── Initial Defaults ──────────────────────────────────────────────────────────
 
@@ -57,6 +58,156 @@ cli_output=""
 
 # ── Config Loader ─────────────────────────────────────────────────────────────
 
+get_config() {
+  if [[ ! -f "$CONFIG_FILE" ]]; then
+    echo "Error: Config file not found at $CONFIG_FILE" >&2
+    exit 1
+  fi
+  
+  local first_section=1
+  while IFS= read -r line || [[ -n "$line" ]]; do
+    local stripped="${line%%#*}"
+    stripped="${stripped%"${stripped##*[![:space:]]}"}"
+    if [[ -z "$stripped" ]]; then
+      continue
+    fi
+    
+    if [[ "$stripped" =~ ^\[([A-Za-z_-]+)\]$ ]]; then
+      if [[ $first_section -eq 0 ]]; then
+        echo ""
+      fi
+      first_section=0
+      echo "$stripped"
+    elif [[ "$stripped" =~ ^[[:space:]]*([A-Za-z_]+)[[:space:]]*=[[:space:]]*(.*)$ ]]; then
+      local key="${BASH_REMATCH[1]}"
+      local val="${BASH_REMATCH[2]}"
+      printf "%-6s = %s\n" "$key" "$val"
+    fi
+  done < "$CONFIG_FILE"
+}
+
+set_config() {
+  local target_section="defaults"
+  if [[ $# -gt 0 ]]; then
+    if [[ "$1" == "default" || "$1" == "defaults" ]]; then
+      target_section="defaults"
+      shift
+    elif [[ "$1" == "desktop" ]]; then
+      target_section="desktop"
+      shift
+    fi
+  fi
+  
+  local new_output=""
+  local new_json=""
+  local new_swatch=""
+  local new_name=""
+  local new_copy=""
+  local new_pick=""
+  local new_notify=""
+  local new_alpha=""
+
+  while [[ $# -gt 0 ]]; do
+    case "$1" in
+      --output=*) new_output="${1#*=}" ;;
+      output=*) new_output="${1#*=}" ;;
+      --json) new_json="true" ;;
+      --no-json) new_json="false" ;;
+      --alpha) new_alpha="true" ;;
+      --no-alpha) new_alpha="false" ;;
+      --name) new_name="true" ;;
+      --no-name) new_name="false" ;;
+      --swatch) new_swatch="true" ;;
+      --no-swatch) new_swatch="false" ;;
+      --copy) new_copy="true" ;;
+      --no-copy) new_copy="false" ;;
+      --notify) new_notify="true" ;;
+      --no-notify) new_notify="false" ;;
+      --pick) new_pick="true" ;;
+      --no-pick) new_pick="false" ;;
+      -*) 
+        echo "Error: Unknown option for --set-config: $1" >&2
+        exit 1
+        ;;
+      *)
+        echo "Error: Unknown argument for --set-config: $1" >&2
+        exit 1
+        ;;
+    esac
+    shift
+  done
+  
+  if [[ -n "$new_output" ]]; then
+    new_output="${new_output#\"}"
+    new_output="${new_output%\"}"
+  fi
+
+  if [[ ! -f "$CONFIG_FILE" ]]; then
+    echo "Error: Config file not found at $CONFIG_FILE. Run --install first." >&2
+    exit 1
+  fi
+  
+  local temp_file
+  temp_file="$(mktemp)"
+  local current_section=""
+  
+  while IFS= read -r line || [[ -n "$line" ]]; do
+    local original_line="$line"
+    local parsed_line="${line%%#*}"
+    
+    if [[ "$parsed_line" =~ ^\[([A-Za-z_-]+)\]$ ]]; then
+      current_section="${BASH_REMATCH[1]}"
+      echo "$original_line" >> "$temp_file"
+      continue
+    fi
+    
+    if [[ "$current_section" == "$target_section" && "$parsed_line" =~ ^[[:space:]]*([A-Za-z_]+)[[:space:]]*= ]]; then
+      local key="${BASH_REMATCH[1]}"
+      local new_val=""
+      case "$key" in
+        output)
+          if [[ -n "$new_output" ]]; then new_val="\"$new_output\""; fi
+          ;;
+        json)
+          if [[ -n "$new_json" ]]; then new_val="$new_json"; fi
+          ;;
+        alpha)
+          if [[ -n "$new_alpha" ]]; then new_val="$new_alpha"; fi
+          ;;
+        swatch)
+          if [[ -n "$new_swatch" ]]; then new_val="$new_swatch"; fi
+          ;;
+        name)
+          if [[ -n "$new_name" ]]; then new_val="$new_name"; fi
+          ;;
+        copy)
+          if [[ -n "$new_copy" ]]; then new_val="$new_copy"; fi
+          ;;
+        pick)
+          if [[ -n "$new_pick" ]]; then new_val="$new_pick"; fi
+          ;;
+        notify)
+          if [[ -n "$new_notify" ]]; then new_val="$new_notify"; fi
+          ;;
+      esac
+      
+      if [[ -n "$new_val" ]]; then
+        if [[ "$original_line" =~ ^([[:space:]]*[A-Za-z_]+[[:space:]]*=[[:space:]]*)([^[:space:]#]+)(.*)$ ]]; then
+           echo "${BASH_REMATCH[1]}$new_val${BASH_REMATCH[3]}" >> "$temp_file"
+           continue
+        elif [[ "$original_line" =~ ^([[:space:]]*[A-Za-z_]+[[:space:]]*=[[:space:]]*)(.*)$ ]]; then
+           echo "${BASH_REMATCH[1]}$new_val" >> "$temp_file"
+           continue
+        fi
+      fi
+    fi
+    
+    echo "$original_line" >> "$temp_file"
+  done < "$CONFIG_FILE"
+  
+  mv "$temp_file" "$CONFIG_FILE"
+}
+
 # Parse ~/.config/color-tool/config.toml and apply [defaults] and [desktop] values.
 load_config() {
   [[ ! -f "$CONFIG_FILE" ]] && return 0
@@ -98,6 +249,37 @@ load_config() {
   done <"$CONFIG_FILE"
 }
 
+write_default_config() {
+  mkdir -p "$(dirname "$CONFIG_FILE")"
+  cat >"$CONFIG_FILE" <<EOF
+# color-tool configuration
+# Source: $REPO_URL
+
+[defaults]
+# Set any option to true to enable it by default when using the terminal
+output = "hex"  # default output format(s): hex, rgb, hsl, rgba, hsla, hexa, all
+json   = false  # output in JSON format
+swatch = false  # show color swatch in terminal
+name   = false  # fetch color name from thecolorapi.com
+copy   = false  # copy result to clipboard
+pick   = false  # auto-launch color picker when invoked with no arguments
+notify = false  # show desktop notification
+
+[desktop]
+# Defaults for --desktop mode (launched from the app menu; copy is always enabled by default)
+output = "hex"  # format to copy
+json   = false  # copy JSON format instead of plain text
+name   = false  # fetch color name (requires network)
+copy   = true   # copy result to clipboard
+notify = true   # show desktop notification with the copied value
+EOF
+}
+
+reset_config() {
+  write_default_config
+  echo "Configuration reset to defaults: $CONFIG_FILE"
+}
+
 # ── Help ──────────────────────────────────────────────────────────────────────
 
 show_help() {
@@ -121,9 +303,12 @@ show_help() {
   printf "  ${bold}${cyan}--[no-]json${reset}    Output as a JSON table of selected formats\n"
   printf "  ${bold}${cyan}--[no-]name${reset}    Fetch nearest color name from thecolorapi.com ${dim}(requires curl, jq)${reset}\n"
   printf "  ${bold}${cyan}--[no-]swatch${reset}  Include a color swatch in the terminal output\n"
-  printf "  ${bold}${cyan}--[no-]copy${reset}    Copy result to clipboard ${dim}(wl-copy preferred, xclip as fallback)${reset}\n"
+  printf "  ${bold}${cyan}--[no-]copy${reset}    Copy result to clipboard ${dim}(wl-clipboard preferred, xclip as fallback)${reset}\n"
   printf "  ${bold}${cyan}--[no-]notify${reset}  Show desktop notification ${dim}(on by default in --desktop)${reset}\n"
   printf "  ${bold}${cyan}--desktop${reset}      GUI mode: pick → copy → notify ${dim}(for app menu / .desktop launcher)${reset}\n"
+  printf "  ${bold}${cyan}--get-config${reset}   Print the current configuration\n"
+  printf "  ${bold}${cyan}--set-config${reset}   Update the configuration ${dim}(e.g. --set-config desktop --copy)${reset}\n"
+  printf "  ${bold}${cyan}--reset-config${reset} Restore the configuration file to its default values\n"
   printf "  ${bold}${cyan}--install${reset}      Install to ~/.local/share/color-tool/ and symlink into ~/.local/bin/\n"
   printf "  ${bold}${cyan}--help${reset}, ${bold}${cyan}-h${reset}     Show this help message\n\n"
 
@@ -278,30 +463,8 @@ do_install() {
 
   local config_dir="$HOME/.config/color-tool"
   local config_file="$config_dir/config.toml"
-  mkdir -p "$config_dir"
   if [[ ! -f "$config_file" ]]; then
-    cat >"$config_file" <<'EOF'
+    write_default_config
-# color-tool configuration
-# https://github.com/rootiest/color-tool
-
-[defaults]
-# Set any option to true to enable it by default when using the terminal
-output = "hex"  # default output format(s): hex, rgb, hsl, rgba, hsla, hexa, all
-json   = false  # output in JSON format
-swatch = false  # show color swatch in terminal
-name   = false  # fetch color name from thecolorapi.com
-copy   = false  # copy result to clipboard
-pick   = false  # auto-launch color picker when invoked with no arguments
-notify = false  # show desktop notification
-
-[desktop]
-# Defaults for --desktop mode (launched from the app menu; copy is always enabled by default)
-output = "hex"  # format to copy
-json   = false  # copy JSON format instead of plain text
-name   = false  # fetch color name (requires network)
-copy   = true   # copy result to clipboard
-notify = true   # show desktop notification with the copied value
-EOF
     printf "  config  %s  (sample created)\n" "$config_file"
   else
     printf "  config  %s\n" "$config_file"
@@ -521,6 +684,19 @@ while [[ $# -gt 0 ]]; do
     do_install
     exit 0
     ;;
+  --get-config)
+    get_config
+    exit 0
+    ;;
+  --set-config)
+    shift
+    set_config "$@"
+    exit 0
+    ;;
+  --reset-config)
+    reset_config
+    exit 0
+    ;;
   -*)
     echo "Unknown option: $1" >&2
     exit 1