#!/usr/bin/env bash
# Set up formatters for a project by symlinking selected formatters from claude-foundations.
#
# Usage: setup-formatters.sh <project-dir> <ext> [<ext> ...]
# Example: setup-formatters.sh ~/dev/claude/projects/my-project py sh
#
# This creates a formatters/ directory in the target project and symlinks
# the requested formatter scripts from claude-foundations/formatters/.

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
FOUNDATIONS_FORMATTERS="$(cd "$SCRIPT_DIR/../formatters" && pwd)"

if [ $# -lt 2 ]; then
    echo "Usage: $(basename "$0") <project-dir> <ext> [<ext> ...]"
    echo ""
    echo "Available formatters:"
    for f in "$FOUNDATIONS_FORMATTERS"/*; do
        [ -e "$f" ] || continue
        NAME="$(basename "$f")"
        if [ -L "$f" ]; then
            TARGET="$(readlink "$f")"
            echo "  $NAME → $TARGET"
        else
            echo "  $NAME"
        fi
    done
    exit 1
fi

PROJECT_DIR="$1"
shift

if [ ! -d "$PROJECT_DIR" ]; then
    echo "Error: $PROJECT_DIR is not a directory" >&2
    exit 1
fi

DEST="$PROJECT_DIR/formatters"
mkdir -p "$DEST"

# Compute relative path from project formatters/ to foundations formatters/
REL_PATH="$(python3 -c "import os.path; print(os.path.relpath('$FOUNDATIONS_FORMATTERS', '$DEST'))")"

echo "Setting up formatters in $DEST"
echo ""

for EXT in "$@"; do
    SRC="$FOUNDATIONS_FORMATTERS/$EXT"
    if [ ! -e "$SRC" ]; then
        echo "  ✗ $EXT — not found in $FOUNDATIONS_FORMATTERS" >&2
        continue
    fi
    ln -sf "$REL_PATH/$EXT" "$DEST/$EXT"
    echo "  ✓ $EXT"
done

echo ""
echo "Done. Add formatters/ to your .gitignore or commit the symlinks."

# Also set up pre-commit hook if git repo
if git -C "$PROJECT_DIR" rev-parse --git-dir >/dev/null 2>&1; then
    GIT_DIR="$(git -C "$PROJECT_DIR" rev-parse --git-dir)"
    PRECOMMIT="$GIT_DIR/hooks/pre-commit"
    PRECOMMIT_SRC="$SCRIPT_DIR/../hooks/pre-commit-lint.sh"

    if [ ! -e "$PRECOMMIT" ]; then
        ln -sf "$(cd "$(dirname "$PRECOMMIT_SRC")" && pwd)/$(basename "$PRECOMMIT_SRC")" "$PRECOMMIT"
        echo "Git pre-commit hook installed: $PRECOMMIT → pre-commit-lint.sh"
    else
        echo "Git pre-commit hook already exists at $PRECOMMIT (not overwritten)."
    fi
fi