#!/usr/bin/env bash
#
# Package the cycling-training skill into a zip that installs as a Claude skill
# (Claude Desktop / claude.ai "Skills", or Claude Code).
#
# The archive contains a single top-level `cycling-training/` directory holding
# SKILL.md + supporting docs — the layout Claude expects when importing a skill.
#
# Usage:
#   scripts/build-skill-zip.sh [version]
# Example:
#   scripts/build-skill-zip.sh v1.0.0   ->  dist/cycling-training-v1.0.0.zip
#   scripts/build-skill-zip.sh          ->  dist/cycling-training-dev.zip
#
set -euo pipefail

SKILL_NAME="cycling-training"
ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
VERSION="${1:-dev}"
OUT_DIR="${ROOT}/dist"
STAGE="${OUT_DIR}/${SKILL_NAME}"
ZIP_NAME="${SKILL_NAME}-${VERSION}.zip"

# The files that make up the installable skill (repo/CI cruft is excluded).
INCLUDE=(SKILL.md README.md references assets)

rm -rf "${OUT_DIR}"
mkdir -p "${STAGE}"

for item in "${INCLUDE[@]}"; do
  if [ ! -e "${ROOT}/${item}" ]; then
    echo "ERROR: expected '${item}' not found at repo root" >&2
    exit 1
  fi
  cp -R "${ROOT}/${item}" "${STAGE}/"
done

# Sanity checks: a skill is only valid with a SKILL.md that has name + description.
test -f "${STAGE}/SKILL.md" || { echo "ERROR: SKILL.md missing from package" >&2; exit 1; }
grep -q "^name:" "${STAGE}/SKILL.md" || { echo "ERROR: SKILL.md has no 'name:' frontmatter" >&2; exit 1; }
grep -q "^description:" "${STAGE}/SKILL.md" || { echo "ERROR: SKILL.md has no 'description:' frontmatter" >&2; exit 1; }

# Build the zip with the skill folder as the single top-level entry.
( cd "${OUT_DIR}" && zip -r -q "${ZIP_NAME}" "${SKILL_NAME}" -x '*.DS_Store' )

echo "Built ${OUT_DIR}/${ZIP_NAME}"
echo "Contents:"
( cd "${OUT_DIR}" && unzip -l "${ZIP_NAME}" )