#!/usr/bin/env bash
# Prints the next eligible queue issue as JSON: {issue_num, canonical_id, driver, plan_pr_id, branch, ...}
# Eligible = open + label queue/queued + all canonical deps closed.
# Picks lowest phase first, then lowest issue number within phase.
set -euo pipefail
HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
. "$HERE/lib.sh"

python - <<PY
import json, urllib.request, re, os, sys

token = os.environ["GITEA_TOKEN"]
api_base = "https://gitea.dohertylan.com/api/v1/repos/dohertj2/lmxopcua"

def api(path):
    req = urllib.request.Request(f"{api_base}/{path}",
        headers={"Authorization": f"token {token}"})
    with urllib.request.urlopen(req) as r:
        return json.loads(r.read().decode())

# Gather all queue issues
issues = []
page = 1
while True:
    items = api(f"issues?state=all&type=issues&limit=50&page={page}&labels=auto-managed")
    if not items: break
    issues.extend(items)
    page += 1

by_id = {}
for it in issues:
    m = re.search(r'<!-- queue-meta\s*(\{.*?\})\s*-->', it.get("body","") or "", re.S)
    if not m: continue
    try: meta = json.loads(m.group(1))
    except: continue
    by_id[meta["id"]] = (it, meta)

def is_done(issue):
    if issue["state"] == "closed": return True
    labels = {l["name"] for l in issue["labels"]}
    return "queue/done" in labels

eligible = []
for cid, (it, meta) in by_id.items():
    labels = {l["name"] for l in it["labels"]}
    if it["state"] != "open": continue
    if "queue/queued" not in labels: continue
    deps = meta.get("deps", [])
    blocked = False
    for d in deps:
        if d not in by_id:
            blocked = True; break
        if not is_done(by_id[d][0]):
            blocked = True; break
    if blocked: continue
    eligible.append((meta.get("phase",99), it["number"], cid, it, meta))

if not eligible:
    print(json.dumps({"empty": True}))
    sys.exit(0)

eligible.sort(key=lambda x: (x[0], x[1]))
phase, num, cid, it, meta = eligible[0]
plan_pr = meta.get("plan_pr_id","").replace("/","-")
result = {
    "empty": False,
    "issue_num": num,
    "canonical_id": cid,
    "driver": meta["driver"],
    "phase": meta["phase"],
    "plan_pr_id": meta.get("plan_pr_id",""),
    "title": it["title"],
    "branch": f"auto/{meta['driver']}/{plan_pr}",
    "url": it["html_url"],
}
print(json.dumps(result, indent=2))
PY