#!/usr/bin/env bash
# Update flow for gitea-local-fork driven by passthru.updateScript.
# Invoked by `nix-update --use-update-script gitea-local-fork`.
#
# Source fork:    /home/oleks/projects/gitea
# Source remote:  https://git.oleks.space/oleks/gitea.git (named `oleks` locally)
# Tracked branch: oleks/main  (formerly `feat/projects-api`, renamed 2026-05-13)
#
# nix-update with --version=branch=X constructs the new version as
# `<latest-tag>-unstable-<date>` where <latest-tag> is the most recent
# tag on the remote. If we leave an old `v1.26.0-unstable-<date>` tag
# from a previous run on the gitea fork, nix-update will pick that
# as <latest-tag> and we end up with double suffixes. So:
#
#   0. Delete any prior `*-unstable-*` tag on the gitea fork (local + remote).
#   1. Run nix-update default flow: it now sees only clean semver tags
#      (v1.26.0 etc.), constructs `1.26.0-unstable-<commit-date>`.
#   2. Tag the gitea fork at the new rev with v<version>, push the tag.
#   3. Commit flake-hub's package.nix change, push to origin.

set -euo pipefail

FLAKE_HUB="${FLAKE_HUB:-$HOME/projects/nix-customs/flake-hub}"
GITEA_REPO="${GITEA_REPO:-$HOME/projects/gitea}"
PKG_FILE="$FLAKE_HUB/packages/gitea-local-fork.nix"

log() { printf '\033[1;36m==>\033[0m %s\n' "$*"; }

# ── 0. Wipe prior unstable tags from gitea fork ───────────────────────────
cd "$GITEA_REPO"
log "Cleaning up previous unstable tags on gitea fork (so nix-update sees only clean semver tags)"
mapfile -t PREV_TAGS < <(git ls-remote --tags oleks 'refs/tags/v*-unstable-*' |
	awk '{print $2}' |
	sed 's|refs/tags/||;s|\^{}$||' |
	sort -u)
for tag in "${PREV_TAGS[@]}"; do
	[ -z "$tag" ] && continue
	log "  deleting $tag"
	git tag -d "$tag" 2>/dev/null || true
	git push oleks ":refs/tags/$tag" 2>/dev/null || true
done

# ── 1. nix-update default flow ────────────────────────────────────────────
# Also normalize the in-file version to its bare semver baseline so
# nix-update doesn't see a stale unstable suffix from the local file.
cd "$FLAKE_HUB"
log "Normalizing in-file version baseline"
sed -i -E 's/(version = "[^"]+?)-unstable-[0-9]{4}-[0-9]{2}-[0-9]{2}"/\1"/' "$PKG_FILE"

log "Running nix-update against oleks/main tip on the gitea fork"
nix run nixpkgs#nix-update -- \
	--flake gitea-local-fork \
	--version=branch=main \
	--build

# ── 2. Tag gitea fork ─────────────────────────────────────────────────────
NEW_REV=$(grep -oP 'rev = "\K[a-f0-9]{40}' "$PKG_FILE" | head -1)
NEW_VER=$(grep -oP 'version = "\K[^"]+' "$PKG_FILE" | head -1)
TAG="v${NEW_VER}"
log "New version: $NEW_VER (rev ${NEW_REV:0:12})"

cd "$GITEA_REPO"
if git rev-parse --verify --quiet "refs/tags/$TAG" >/dev/null; then
	log "Tag $TAG already exists locally — skipping"
else
	log "Tagging gitea fork: $TAG at ${NEW_REV:0:12}"
	git -c commit.gpgsign=false tag -a "$TAG" "$NEW_REV" \
		-m "Pinned by nix-customs/flake-hub gitea-local-fork derivation"
fi
log "Pushing tag to oleks remote"
git push oleks "$TAG" 2>/dev/null || log "  tag already on remote"

# ── 3. Commit + push flake-hub changes ────────────────────────────────────
cd "$FLAKE_HUB"
if git diff --quiet -- "$PKG_FILE"; then
	log "flake-hub: no changes to commit"
else
	log "flake-hub: committing version + hashes bump"
	git -c commit.gpgsign=false add "$PKG_FILE"
	git -c commit.gpgsign=false commit -m "gitea-local-fork: refresh to $NEW_VER

Pin to gitea fork rev ${NEW_REV:0:12} (tag $TAG).
Refreshed by nix-update via passthru.updateScript."
fi

if git rev-parse '@{u}' >/dev/null 2>&1; then
	log "flake-hub: pushing"
	git push
else
	log "flake-hub: no upstream tracking — skipping push"
fi

log "Done. New version $NEW_VER live at:"
log "  gitea tag: https://git.oleks.space/oleks/gitea/src/tag/$TAG"
log "  derivation: $PKG_FILE"