#!/bin/bash

# Link a skill from the project's skills/ directory to Hermes agent
# Usage: ./scripts/link-skill.sh [skill-name]

set -e

PROJECT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
SKILLS_DIR="$PROJECT_DIR/skills"
HERMES_SKILLS_DIR="$HOME/.hermes/skills"

# Parse arguments
SKILL_NAME=""

for arg in "$@"; do
	case "$arg" in
	*)
		SKILL_NAME="$arg"
		;;
	esac
done

# Collect available skills
skills=()
for skill_dir in "$SKILLS_DIR"/*/; do
	if [ -d "$skill_dir" ] && [ -f "$skill_dir/SKILL.md" ]; then
		skills+=("$(basename "$skill_dir")")
	fi
done

if [ ${#skills[@]} -eq 0 ]; then
	echo "Error: No skills found in $SKILLS_DIR"
	exit 1
fi

# If no skill name provided, show selection menu
if [ -z "$SKILL_NAME" ]; then
	echo "Select a skill to link:"
	echo ""
	for i in "${!skills[@]}"; do
		echo "  $((i + 1))) ${skills[$i]}"
	done
	echo ""
	read -p "Enter number (1-${#skills[@]}): " choice

	if [[ ! "$choice" =~ ^[0-9]+$ ]] || [ "$choice" -lt 1 ] || [ "$choice" -gt ${#skills[@]} ]; then
		echo "Error: Invalid selection"
		exit 1
	fi

	SKILL_NAME="${skills[$((choice - 1))]}"
fi

SOURCE_DIR="$PROJECT_DIR/skills/$SKILL_NAME"
HERMES_TARGET_DIR="$HERMES_SKILLS_DIR/$SKILL_NAME"

# Check if source skill exists
if [ ! -d "$SOURCE_DIR" ]; then
	echo "Error: Skill '$SKILL_NAME' not found at $SOURCE_DIR"
	exit 1
fi

if [ ! -f "$SOURCE_DIR/SKILL.md" ]; then
	echo "Error: SKILL.md not found in $SOURCE_DIR"
	exit 1
fi

# Function to create symlink with conflict handling
create_symlink() {
	local source="$1"
	local target="$2"
	local target_dir="$(dirname "$target")"

	# Create target directory if needed
	mkdir -p "$target_dir"

	# Check if target already exists
	if [ -e "$target" ]; then
		if [ -L "$target" ]; then
			current_target=$(readlink "$target")
			if [ "$current_target" = "$source" ]; then
				echo "  Already linked: $(basename "$target") -> $source"
				return 0
			else
				echo "  Warning: $(basename "$target") is already linked to $current_target"
				read -p "  Replace? (y/N) " -n 1 -r
				echo
				if [[ ! $REPLY =~ ^[Yy]$ ]]; then
					echo "  Skipped."
					return 0
				fi
				rm "$target"
			fi
		else
			echo "  Error: $target already exists and is not a symlink"
			read -p "  Remove and replace with symlink? (y/N) " -n 1 -r
			echo
			if [[ ! $REPLY =~ ^[Yy]$ ]]; then
				echo "  Skipped."
				return 0
			fi
			rm -rf "$target"
		fi
	fi

	# Create symlink
	ln -s "$source" "$target"
	echo "  Linked: $(basename "$target") -> $source"
}

# Create Hermes skills directory if it doesn't exist
if [ ! -d "$HERMES_SKILLS_DIR" ]; then
	echo "Creating Hermes skills directory: $HERMES_SKILLS_DIR"
	mkdir -p "$HERMES_SKILLS_DIR"
fi

# Link to Hermes agent
echo "Linking to Hermes agent ($HERMES_SKILLS_DIR):"
create_symlink "$SOURCE_DIR" "$HERMES_TARGET_DIR"

echo ""
echo "Done!"