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

# Fenris one-command release flow (issue #52).
# Builds both packages, signs, uploads to registry, creates release entry,
# and attaches artifacts — or in dry-run mode, prints every command.
#
# Usage:
#   scripts/release.sh --dry-run          # Print commands without executing
#   scripts/release.sh --publish          # Execute the full release flow
#
# Environment:
#   GITEA_TOKEN   - API token for Gitea registry and release API
#   PACKAGING_KEY - GPG key UID (default: packaging@bongbetic.com)
#
# Spec: release-packaging.md §5

# ── Defaults ─────────────────────────────────────────────────────────────

DRY_RUN=false
PUBLISH=false
GITEA_URL="https://git.bongbetic.com"
GITEA_OWNER="xavierk"
GITEA_REPO="Fenris"
PACKAGING_KEY="${PACKAGING_KEY:-packaging@bongbetic.com}"

CODENAMES=(bookworm jammy noble)
RPM_GROUP="fenris"

# ── Parse arguments ──────────────────────────────────────────────────────

for arg in "$@"; do
    case "$arg" in
        --dry-run) DRY_RUN=true ;;
        --publish) PUBLISH=true ;;
        --help|-h)
            echo "Usage: $0 [--dry-run | --publish]"
            echo ""
            echo "Modes:"
            echo "  --dry-run   Print commands without executing (default)"
            echo "  --publish   Execute the full release flow"
            echo ""
            echo "Environment:"
            echo "  GITEA_TOKEN   API token for Gitea registry and release API"
            echo "  PACKAGING_KEY GPG key UID (default: packaging@bongbetic.com)"
            exit 0
            ;;
        *)
            echo "Unknown argument: $arg" >&2
            echo "Usage: $0 [--dry-run | --publish]" >&2
            exit 1
            ;;
    esac
done

if ! $DRY_RUN && ! $PUBLISH; then
    DRY_RUN=true
fi

# ── Helpers ──────────────────────────────────────────────────────────────

_version() {
    sed -n 's/^version = "\(.*\)"/\1/p' pyproject.toml
}

_deb_name() {
    local ver="$1"
    echo "fenris_${ver}_amd64.deb"
}

_rpm_name() {
    local ver="$1" rel="$2"
    echo "fenris-${ver}-${rel}.x86_64.rpm"
}

_run() {
    if $DRY_RUN; then
        echo "  $*"
    else
        eval "$@"
    fi
}

# ── Main ─────────────────────────────────────────────────────────────────

VERSION=$(_version)
REVISION=1
DEB=$(_deb_name "$VERSION")
RPM=$(_rpm_name "$VERSION" "$REVISION")

echo "=== Fenris Release v${VERSION} ==="
echo ""

if $DRY_RUN; then
    echo "[dry-run] Commands below will be executed in --publish mode."
    echo ""
fi

# ── Step 1: Build both formats ──────────────────────────────────────────

echo "--- Build packages ---"
_run "make package"
echo ""

# ── Step 2: Sign RPM payload ────────────────────────────────────────────

echo "--- Sign RPM payload ---"
_run "rpmsign --addsign --define '_gpg_name ${PACKAGING_KEY}' dist/${RPM}"
echo ""

# ── Step 3: Generate and clearsign SHA256SUMS ────────────────────────────

echo "--- Generate SHA256SUMS ---"
_run "cd dist && sha256sum ${DEB} ${RPM} > SHA256SUMS"
echo ""

echo "--- Clearsign SHA256SUMS ---"
_run "gpg --batch --yes --clearsign --local-user ${PACKAGING_KEY} dist/SHA256SUMS"
echo ""

# ── Step 4: Upload to Gitea package registry ─────────────────────────────

echo "--- Upload packages to registry ---"
for codename in "${CODENAMES[@]}"; do
    _run "curl --fail -X PUT -u ${GITEA_OWNER}:\$GITEA_TOKEN -T dist/${DEB} '${GITEA_URL}/api/packages/${GITEA_OWNER}/debian/pool/${codename}/main/upload'"
done
_run "curl --fail -X PUT -u ${GITEA_OWNER}:\$GITEA_TOKEN -T dist/${RPM} '${GITEA_URL}/api/packages/${GITEA_OWNER}/rpm/${RPM_GROUP}/upload'"
echo ""

# ── Step 5: Create Gitea release with notes ─────────────────────────────

echo "--- Create Gitea release ---"
_release_notes="Release v${VERSION}

## Packages

Install via apt (Debian/Ubuntu):

\`\`\`bash
curl --fail -fsSL https://git.bongbetic.com/${GITEA_OWNER}/${GITEA_REPO}/raw/branch/main/packaging/keys/fenris-packaging.asc | sudo gpg --dearmor -o /etc/apt/keyrings/fenris.asc
echo \"deb [signed-by=/etc/apt/keyrings/fenris.asc] https://git.bongbetic.com/api/packages/${GITEA_OWNER}/debian bookworm main\" | sudo tee /etc/apt/sources.list.d/fenris.list
sudo apt update && sudo apt install fenris
\`\`\`

Install via dnf (Fedora):

\`\`\`bash
sudo dnf config-manager --add-repo https://git.bongbetic.com/${GITEA_OWNER}/${GITEA_REPO}/raw/branch/main/packaging/fenris.repo
sudo dnf install fenris
\`\`\`

## Verification

\`\`\`bash
rpm -Kv fenris-${VERSION}-1.x86_64.rpm
gpg --verify SHA256SUMS.asc SHA256SUMS
\`\`\`

## Artifacts

- \`dist/${DEB}\` (Debian/Ubuntu)
- \`dist/${RPM}\` (Fedora)
- \`dist/SHA256SUMS.asc\` (clearsigned checksums)

See [docs/install/signing-key-ceremony.md](docs/install/signing-key-ceremony.md) for key ceremony details.
See [docs/install/migrate-from-makeinstall.md](docs/install/migrate-from-makeinstall.md) for migration from make install."

if $DRY_RUN; then
    _run "curl --fail -X POST -u ${GITEA_OWNER}:\$GITEA_TOKEN -H 'Content-Type: application/json' -d '{\"tag_name\":\"v${VERSION}\",\"name\":\"v${VERSION}\",\"body\":\"...\"}' '${GITEA_URL}/api/v1/repos/${GITEA_OWNER}/${GITEA_REPO}/releases'"
else
    # Create release via Gitea API (creates the tag atomically — no bare tag)
    RELEASE_RESPONSE=$(curl --fail -s -X POST \
        -u "${GITEA_OWNER}:${GITEA_TOKEN}" \
        -H "Content-Type: application/json" \
        -d "$(jq -n \
            --arg tag "v${VERSION}" \
            --arg name "v${VERSION}" \
            --arg body "$_release_notes" \
            '{tag_name: $tag, name: $name, body: $body}')" \
        "${GITEA_URL}/api/v1/repos/${GITEA_OWNER}/${GITEA_REPO}/releases")

    RELEASE_ID=$(echo "$RELEASE_RESPONSE" | jq -r '.id')
    echo "  Release created: ${GITEA_URL}/${GITEA_OWNER}/${GITEA_REPO}/releases/tag/v${VERSION}"
fi
echo ""

# ── Step 6: Attach artifacts to release ──────────────────────────────────

echo "--- Attach artifacts to release ---"
for artifact in "dist/${DEB}" "dist/${RPM}" "dist/SHA256SUMS.asc"; do
    _run "curl --fail -X POST -u ${GITEA_OWNER}:\$GITEA_TOKEN -F 'attachment=@${artifact}' '${GITEA_URL}/api/v1/repos/${GITEA_OWNER}/${GITEA_REPO}/releases/${RELEASE_ID:-0}/assets'"
done
echo ""

# ── Done ─────────────────────────────────────────────────────────────────

echo "=== Release v${VERSION} complete ==="
echo ""
echo "Summary:"
echo "  Packages: ${DEB}, ${RPM}"
echo "  Checksums: dist/SHA256SUMS.asc"
echo "  Registry: deb → bookworm, jammy, noble; rpm → ${RPM_GROUP}"
echo "  Release: ${GITEA_URL}/${GITEA_OWNER}/${GITEA_REPO}/releases/tag/v${VERSION}"
echo ""
echo "Key ceremony: delete the private key after release."
echo "  See docs/install/signing-key-ceremony.md"