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

# ── Configuration ──────────────────────────────────────────────
GITEA_URL="https://code.crashlabs.io"
REPO="dave/story-kit"
BINARY_NAME="story-kit"

# ── Load .env if present ───────────────────────────────────────
SCRIPT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
if [ -f "${SCRIPT_DIR}/.env" ]; then
  set -a
  source "${SCRIPT_DIR}/.env"
  set +a
fi

# ── Preflight ──────────────────────────────────────────────────
if [ -z "${GITEA_TOKEN:-}" ]; then
  echo "Error: GITEA_TOKEN is not set."
  echo "Create a token at ${GITEA_URL}/user/settings/applications"
  echo "Then add to .env:  GITEA_TOKEN=your_token"
  exit 1
fi

VERSION="${1:-}"
if [ -z "$VERSION" ]; then
  echo "Usage: script/release <version>"
  echo "Example: script/release 0.2.0"
  exit 1
fi

TAG="v${VERSION}"

if git rev-parse "$TAG" >/dev/null 2>&1; then
  echo "Error: Tag ${TAG} already exists."
  exit 1
fi

if ! command -v cross >/dev/null 2>&1; then
  echo "Error: 'cross' is not installed. Run: cargo install cross"
  exit 1
fi

if ! docker info >/dev/null 2>&1; then
  echo "Error: Docker is not running. Start Docker Desktop first."
  exit 1
fi

echo "==> Releasing ${TAG}"

# ── Build ──────────────────────────────────────────────────────
echo "==> Building macOS (native)..."
cargo build --release

echo "==> Building Linux (static musl via cross)..."
cross build --release --target x86_64-unknown-linux-musl

# ── Package ────────────────────────────────────────────────────
DIST="target/dist"
rm -rf "$DIST"
mkdir -p "$DIST"

cp "target/release/${BINARY_NAME}" "${DIST}/${BINARY_NAME}-macos-arm64"
cp "target/x86_64-unknown-linux-musl/release/${BINARY_NAME}" "${DIST}/${BINARY_NAME}-linux-amd64"
chmod +x "${DIST}"/*

echo "==> Binaries:"
ls -lh "${DIST}"/

# ── Changelog ──────────────────────────────────────────────────
echo "==> Generating changelog..."
PREV_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
if [ -n "$PREV_TAG" ]; then
  CHANGELOG=$(git log "${PREV_TAG}..HEAD" --pretty=format:"- %s" --no-merges)
  RANGE="${PREV_TAG}...${TAG}"
else
  CHANGELOG=$(git log --pretty=format:"- %s" --no-merges)
  RANGE="initial...${TAG}"
fi

if [ -z "$CHANGELOG" ]; then
  CHANGELOG="- No changes since last release"
fi

RELEASE_BODY="## What's Changed

${CHANGELOG}

**Full diff:** ${GITEA_URL}/${REPO}/compare/${RANGE}"

echo "$RELEASE_BODY"

# ── Tag & Push ─────────────────────────────────────────────────
echo "==> Tagging ${TAG}..."
git tag -a "$TAG" -m "Release ${TAG}"
git push origin "$TAG"

# ── Create Gitea Release ──────────────────────────────────────
echo "==> Creating release on Gitea..."
RELEASE_JSON=$(python3 -c "
import json, sys
print(json.dumps({
    'tag_name': sys.argv[1],
    'name': sys.argv[1],
    'body': sys.argv[2]
}))
" "$TAG" "$RELEASE_BODY")

RELEASE_RESPONSE=$(curl -sf -X POST \
  -H "Authorization: token ${GITEA_TOKEN}" \
  -H "Content-Type: application/json" \
  "${GITEA_URL}/api/v1/repos/${REPO}/releases" \
  -d "$RELEASE_JSON")

RELEASE_ID=$(echo "$RELEASE_RESPONSE" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")

# ── Upload Binaries ───────────────────────────────────────────
for file in "${DIST}"/*; do
  filename=$(basename "$file")
  echo "==> Uploading ${filename}..."
  curl -sf -X POST \
    -H "Authorization: token ${GITEA_TOKEN}" \
    -F "attachment=@${file};filename=${filename}" \
    "${GITEA_URL}/api/v1/repos/${REPO}/releases/${RELEASE_ID}/assets" > /dev/null
done

echo ""
echo "==> Done! Release ${TAG} published:"
echo "    ${GITEA_URL}/${REPO}/releases/tag/${TAG}"