#!/usr/bin/env bash
# Deploy a skill from this repo to the ai-skills module skill lists

set -euo pipefail

SKILLS_REPO="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
DOTFILES_REPO="$HOME/proj/dotfiles"
SKILL_NAME=""
PI_ONLY=false

usage() {
    cat <<EOF
Usage: $0 [--pi-only] <skill-name>

Add a skill to the ai-skills module deployment lists.

Arguments:
    skill-name    Name of skill directory in skills/
    --pi-only     Deploy only to pi (for extension-dependent skills)

Examples:
    $0 web-search           # Deploy to all agents
    $0 --pi-only ralph-work-loop  # Deploy to pi only

This script:
1. Validates the skill exists in skills/
2. Checks if skill is in skills.nix registry
3. Shows which agent lists to update in dotfiles/home/claude.nix

Skills are sourced from this repo via Nix flake.
The ai-skills module deploys them to agent locations.

Available skills:
EOF
    ls -1 "$SKILLS_REPO/skills" | grep -v template | sed 's/^/    /'
    exit 1
}

# Parse arguments
while [[ $# -gt 0 ]]; do
    case $1 in
        --pi-only)
            PI_ONLY=true
            shift
            ;;
        --help|-h)
            usage
            ;;
        *)
            SKILL_NAME="$1"
            shift
            ;;
    esac
done

if [[ -z "$SKILL_NAME" ]]; then
    usage
fi

SKILL_SOURCE="$SKILLS_REPO/skills/$SKILL_NAME"

# Validate skill exists
if [[ ! -d "$SKILL_SOURCE" ]]; then
    echo "Error: Skill not found: $SKILL_SOURCE" >&2
    echo "" >&2
    usage
fi

# Check if skill has SKILL.md
if [[ ! -f "$SKILL_SOURCE/SKILL.md" ]]; then
    echo "Error: $SKILL_NAME missing SKILL.md" >&2
    exit 1
fi

# Check if in skills.nix registry
if ! grep -q "\"$SKILL_NAME\"" "$SKILLS_REPO/skills.nix" 2>/dev/null && \
   ! grep -q "^  $SKILL_NAME = " "$SKILLS_REPO/skills.nix" 2>/dev/null; then
    echo "⚠️  Skill '$SKILL_NAME' not in skills.nix registry"
    echo ""
    echo "Add to skills.nix:"
    echo "  $SKILL_NAME = \"<description>\";"
    echo ""
fi

# Check current deployment status
CLAUDE_NIX="$DOTFILES_REPO/home/claude.nix"
if [[ ! -f "$CLAUDE_NIX" ]]; then
    echo "Error: $CLAUDE_NIX not found" >&2
    exit 1
fi

echo "Skill: $SKILL_NAME"
echo "Source: $SKILL_SOURCE"
echo ""

# Check if already deployed
in_claude=$(grep -c "\"$SKILL_NAME\"" "$CLAUDE_NIX" 2>/dev/null | grep -v "^0$" || true)

if [[ -n "$in_claude" ]]; then
    echo "✓ Already in deployment lists"
    echo ""
    echo "Current deployment:"
    grep -B2 -A2 "\"$SKILL_NAME\"" "$CLAUDE_NIX" | head -20
else
    echo "Not yet deployed."
    echo ""
    
    if [[ "$PI_ONLY" == "true" ]]; then
        echo "Add to piSkills in $CLAUDE_NIX:"
        echo ""
        echo '    piSkills = ['
        echo "      \"$SKILL_NAME\""
        echo '      ...'
        echo '    ];'
    else
        echo "Add to skill lists in $CLAUDE_NIX:"
        echo ""
        echo "    claudeCodeSkills = [ ... \"$SKILL_NAME\" ];"
        echo "    openCodeSkills = [ ... \"$SKILL_NAME\" ];"
        echo "    codexSkills = [ ... \"$SKILL_NAME\" ];"
        echo ""
        echo "Or for pi-only (extension-dependent):"
        echo "    piSkills = [ ... \"$SKILL_NAME\" ];"
    fi
fi

echo ""
echo "After updating, run:"
echo "  cd $DOTFILES_REPO && sudo nixos-rebuild switch --flake .#delpad"