#!/usr/bin/env bash
set -euo pipefail

# Symlink all skills from this repo into Claude profile skill directories.
#
# Default: installs into the active profile (CLAUDE_CONFIG_DIR or ~/.claude).
# --all-profiles: installs into every ~/.claude and ~/.claude-* profile found.

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_DIR="$(dirname "$SCRIPT_DIR")"
SKILLS_SRC="$REPO_DIR/skills"

GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

ALL_PROFILES=0
for arg in "$@"; do
    [[ "$arg" == "--all-profiles" ]] && ALL_PROFILES=1
done

# Build target list
declare -a TARGET_DIRS=()
if (( ALL_PROFILES )); then
    # Active profile first, then all others
    [[ -d "$HOME/.claude" ]] && TARGET_DIRS+=("$HOME/.claude")
    for d in "$HOME"/.claude-*/; do
        [[ -d "$d" ]] || continue
        # Skip backup/json files that match the glob
        [[ "$d" == *.json/ || "$d" == *.backup/ ]] && continue
        TARGET_DIRS+=("${d%/}")
    done
else
    TARGET_DIRS=("${CLAUDE_CONFIG_DIR:-$HOME/.claude}")
fi

total_installed=0
total_skipped=0

install_to() {
    local skills_dst="$1/skills"
    mkdir -p "$skills_dst"
    local installed=0 skipped=0

    for skill_dir in "$SKILLS_SRC"/*/; do
        [ -d "$skill_dir" ] || continue
        skill_name="$(basename "$skill_dir")"
        target="$skills_dst/$skill_name"

        if [ -L "$target" ]; then
            existing="$(readlink -f "$target")"
            expected="$(readlink -f "$skill_dir")"
            if [ "$existing" = "$expected" ]; then
                skipped=$((skipped + 1))
                continue
            else
                echo -e "  ${YELLOW}UPDATE${NC} $skill_name"
                rm "$target"
            fi
        elif [ -e "$target" ]; then
            echo -e "  ${YELLOW}SKIP${NC} $skill_name (non-symlink — remove manually to update)"
            skipped=$((skipped + 1))
            continue
        fi

        ln -s "$skill_dir" "$target"
        echo -e "  ${GREEN}INSTALLED${NC} $skill_name"
        installed=$((installed + 1))
    done

    total_installed=$((total_installed + installed))
    total_skipped=$((total_skipped + skipped))
    echo "  → $installed installed, $skipped already up to date"
}

for profile_dir in "${TARGET_DIRS[@]}"; do
    echo "Profile: $profile_dir"
    install_to "$profile_dir"
    echo ""
done

echo "Done. Total installed: $total_installed, skipped: $total_skipped"
echo "Skills are available as slash commands in Claude Code (e.g. /reflect M8)"