#!/usr/bin/env bash
# Create the GitHub release as a draft if missing, upload every file in DIR, then
# publish nightly/preview tags as prereleases. Draft-first is required when the
# repository has immutable releases enabled (assets cannot be added after publish).
# Skips electron-builder builder-debug.yml (and cosign bundles), including collision-renamed
# copies (e.g. win__builder-debug.yml). Requires: gh, GH_TOKEN. TAG from TAG or GITHUB_REF_NAME.
set -euo pipefail

DIR="${1:?path to directory of files to upload}"
TAG="${TAG:-${GITHUB_REF_NAME:?set TAG or GITHUB_REF_NAME}}"

if ! command -v gh >/dev/null 2>&1; then
    echo "gh is required" >&2
    exit 1
fi

if [ -z "${GH_TOKEN:-}" ]; then
    echo "GH_TOKEN is required" >&2
    exit 1
fi

export GH_TOKEN

if [ -z "${GH_REPO:-}" ] && [ -n "${GITHUB_REPOSITORY:-}" ]; then
    export GH_REPO="$GITHUB_REPOSITORY"
fi

is_auto_prerelease_tag() {
    [[ "$1" == nightly-* || "$1" == preview-* ]]
}

mapfile -d '' -t all < <(
    find "$DIR" -type f \
        ! -path '*/win-unpacked/*' \
        ! -path '*/linux-unpacked/*' \
        ! -path '*/mac-universal/*' \
        ! -path '*/mac-arm64/*' \
        ! -path '*/mac-x64/*' \
        ! -path '*/mac/*.app/*' \
        -print0
)

skip_noise() {
    local base="$1"
    case "$base" in
        builder-debug.yml | builder-debug.yml.cosign.bundle) return 0 ;;
        *__builder-debug.yml | *__builder-debug.yml.cosign.bundle) return 0 ;;
        library.zip | library.zip.cosign.bundle) return 0 ;;
        *__library.zip | *__library.zip.cosign.bundle) return 0 ;;
        *.so.yml | *.so.yml.cosign.bundle) return 0 ;;
    esac
    return 1
}

filtered=()
for f in "${all[@]}"; do
    b=$(basename "$f")
    if skip_noise "$b"; then
        continue
    fi
    filtered+=("$f")
done
all=("${filtered[@]}")

if [ "${#all[@]}" -eq 0 ]; then
    echo "No files under ${DIR} (after excluding electron-builder debug YAML)" >&2
    exit 1
fi

declare -A seen
for f in "${all[@]}"; do
    b=$(basename "$f")
    seen[$b]=$((${seen[$b]:-0} + 1))
done

STAGE=$(mktemp -d)
notes_file=$(mktemp)
trap 'rm -rf "$STAGE" "$notes_file"' EXIT

for f in "${all[@]}"; do
    b=$(basename "$f")
    if [ "${seen[$b]}" -gt 1 ]; then
        rel="${f#"$DIR"/}"
        name="${rel//\//__}"
    else
        name="$b"
    fi
    cp -- "$f" "$STAGE/$name"
done

mapfile -t files < <(find "$STAGE" -type f)

{
    if [[ "$TAG" == nightly-* ]]; then
        echo "**Nightly release** - automated daily snapshot from \`dev\`. Not a stable release, use tagged production releases for daily use."
        echo
        echo "Commit: \`${GITHUB_SHA:-unknown}\`"
        echo
    elif [[ "$TAG" == preview-dev-* ]]; then
        echo "**Preview release (dev)** - automated snapshot from \`dev\`. Not a stable release, use tagged production releases for daily use."
        echo
        echo "Commit: \`${GITHUB_SHA:-unknown}\`"
        echo
    elif [[ "$TAG" == preview-* ]]; then
        echo "**Preview release** - automated snapshot from \`master\`. Not a stable release, use tagged production releases for daily use."
        echo
        echo "Commit: \`${GITHUB_SHA:-unknown}\`"
        echo
    else
        echo "Automated draft release. Review assets and provenance before publishing."
        echo
    fi
    echo "## SHA256 Checksums"
    echo
    echo "| Asset | SHA256 |"
    echo "|-------|--------|"
    for f in "${files[@]}"; do
        b=$(basename "$f")
        hash=$(sha256sum "$f" | awk '{print $1}')
        printf "| %s | \`%s\` |\n" "$b" "$hash"
    done
    echo
    echo "## Verification"
    echo
    echo "- **Cosign bundles** (\`.cosign.bundle\`) are attached for keyless sigstore verification."
    echo "- **SLSA provenance** (\`.intoto.jsonl\`) is available for supply-chain attestation."
    echo "- Or verify manually using the SHA256 table above."
} > "$notes_file"

release_exists=false
is_draft=true
if gh release view "$TAG" >/dev/null 2>&1; then
    release_exists=true
    is_draft="$(gh release view "$TAG" --json isDraft --jq '.isDraft')"
fi

if [ "$release_exists" = true ] && [ "$is_draft" != "true" ]; then
    echo "Release ${TAG} is already published." >&2
    echo "Immutable releases cannot accept new assets after publish." >&2
    echo "Create a new tag, or delete this release (and its tag if allowed) and re-run." >&2
    exit 1
fi

# Always create/keep as draft while uploading. Immutable repos lock assets on publish.
if [ "$release_exists" = false ]; then
    gh release create "$TAG" --draft --title "$TAG" --notes-file "$notes_file"
else
    gh release edit "$TAG" --draft --title "$TAG" --notes-file "$notes_file"
fi

for f in "${files[@]}"; do
    gh release upload "$TAG" "$f" --clobber
done

# Nightly/preview: publish as prerelease after all assets are attached.
# Stable tags remain drafts for manual review.
if is_auto_prerelease_tag "$TAG"; then
    gh release edit "$TAG" \
        --draft=false \
        --prerelease \
        --title "$TAG" \
        --notes-file "$notes_file"
fi