#!/usr/bin/env python3
import json, datetime, sys

p = json.load(open("projects.json"))
today = datetime.date.today().isoformat()

def norm(s): return (s or "").strip()

projects = p.get("projects", [])
if not isinstance(projects, list):
    print("ERROR: projects.json must contain a top-level 'projects' array", file=sys.stderr)
    sys.exit(2)

for i, pr in enumerate(projects):
    if not isinstance(pr, dict):
        raise SystemExit(f"ERROR: project[{i}] is not an object")
    if not norm(pr.get("name")):
        raise SystemExit(f"ERROR: project[{i}] missing name")
    st = norm(pr.get("status"))
    if st not in ("active","paused","archived"):
        raise SystemExit(f"ERROR: invalid status '{st}' for {pr.get('name')} (allowed: active|paused|archived)")

p["last_updated"] = today

def section(title, items):
    out = [f"## {title}\n\n"]
    if not items:
        out.append("- (none)\n\n")
        return out
    for pr in sorted(items, key=lambda x: x["name"].lower()):
        out.append(f"- Project: {pr['name']}\n")
        out.append(f"  Status: {pr.get('status','')}\n")
        if pr.get("type"): out.append(f"  Type: {pr['type']}\n")
        if pr.get("repo"): out.append(f"  Repo: {pr['repo']}\n")
        if pr.get("local_path"): out.append(f"  Local Path: {pr['local_path']}\n")
        if pr.get("notes"): out.append(f"  Notes: {pr['notes']}\n")
        out.append("\n")
    return out

active   = [x for x in projects if x.get("status") == "active"]
paused   = [x for x in projects if x.get("status") == "paused"]
archived = [x for x in projects if x.get("status") == "archived"]

md = []
md.append("# Projects Index\n\n")
md.append("This file is generated from projects.json. Do not edit manually.\n\n")
md.append(f"Last Updated: {p['last_updated']}\n\n")
md += section("Active Projects", active)
md += section("Paused Projects", paused)
md += section("Archived Projects", archived)

open("PROJECTS_INDEX.md","w").write("".join(md))
json.dump(p, open("projects.json","w"), indent=2, sort_keys=False)
print("OK: rendered PROJECTS_INDEX.md")