#!/bin/bash
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
cd "$ROOT"

source "$ROOT/tools/release-lib.sh"

# Stable never gets a package of its own. It is pointed at one canary
# already published, so the file every classroom downloads is byte for
# byte the one the canary machine ran.
if [[ $# -eq 1 ]]; then
    version="$1"
else
    if [[ ! -f "$RELEASE_LOCAL/canary/manifest.json" ]]; then
        echo "No local canary manifest exists."
        exit 1
    fi

    version="$(python3 -c \
        'import json, sys; print(json.load(open(sys.argv[1]))["version"])' \
        "$RELEASE_LOCAL/canary/manifest.json")"
fi

release_require_version "$version"

package_name="$(release_package_name "$version")"
package_path="$RELEASE_LOCAL/packages/$package_name"

if [[ ! -f "$package_path" ]]; then
    echo "Package does not exist locally:"
    echo "$package_path"
    exit 1
fi

if [[ "$(release_package_version "$package_path")" != "$version" ]]; then
    echo "$package_name says it is $(release_package_version "$package_path")." >&2
    exit 1
fi

# A classroom only ever installs a version newer than its own, so a stable
# manifest that went backwards would reach nobody and would only make the
# channel say something untrue.
current="$(release_channel_version stable || true)"

if [[ -n "$current" ]] && ! release_version_gt "$version" "$current"; then
    echo "Stable is on $current; $version is not newer." >&2
    exit 1
fi

hash="$(sha256sum "$package_path" | awk '{print $1}')"

echo "Promoting $version to STABLE (from ${current:-nothing})"

# Refuses unless the server already holds exactly this package.
release_publish_manifest stable "$version" "$hash"

echo "$RELEASE_URL/stable/latest.deb -> $package_name"

echo
release_verify_channel stable "$version"

echo
echo "Ekklesia Classroom $version is now STABLE"
echo "$RELEASE_URL/stable/manifest.json"