# retoor <retoor@molodetz.nl>
from datetime import datetime, timedelta, timezone
from pathlib import Path

from pypdf import PdfReader

from molodetz import config
from molodetz.attachments import orphan_blobs
from molodetz.bootstrap import bootstrap_admin
from molodetz.content import create_post
from molodetz.database import (
    all_posts,
    enqueue_backup,
    generate_uid,
    get_user_by_username,
    init_db,
    list_backups,
    list_join_requests,
    list_users,
    prune_audit,
    prune_expired_sessions,
    set_role,
    update_user,
)
from molodetz.database.sql_lint import lint
from molodetz.emoji_builder import write_js_module
from molodetz.services.backup import clear_backups, process_backup, prune_backups
from molodetz.utils.audit import record_system


def prepare():
    config.ensure_data_dirs()
    init_db()


def _user(username):
    user = get_user_by_username(username)
    if user is None:
        raise SystemExit(f"Onbekende gebruiker: {username}")
    return user


def role_get(args):
    print(_user(args.username).get("role"))


def role_set(args):
    user = _user(args.username)
    set_role(user["uid"], args.role)
    record_system("admin.user.role", actor_kind="cli", origin="cli", payload={"role": args.role}, targets=[("user", user["uid"])])
    print(f"{user['username']} -> {args.role}")


def apikey_get(args):
    print(_user(args.username).get("api_key"))


def apikey_reset(args):
    user = _user(args.username)
    key = generate_uid()
    update_user(user["uid"], api_key=key)
    record_system("profile.apikey.regenerate", actor_kind="cli", origin="cli", targets=[("user", user["uid"])])
    print(key)


def apikey_backfill(args):
    changed = 0
    for user in list_users(limit=100000):
        if not user.get("api_key"):
            update_user(user["uid"], api_key=generate_uid())
            changed += 1
    print(f"{changed} sleutels aangevuld")


def posts_list(args):
    for post in all_posts():
        flag = " [placeholder]" if post.get("is_placeholder") else ""
        print(f"{post['uid']}  {post['status']:<9}  {post['topic']:<9}  {post['title']}{flag}")


def read_source(path):
    path = Path(path)
    if path.suffix.lower() == ".pdf":
        reader = PdfReader(str(path))
        return "\n\n".join((page.extract_text() or "").strip() for page in reader.pages).strip()
    return path.read_text(encoding="utf-8")


def posts_import(args):
    path = Path(args.path)
    if not path.is_file():
        raise SystemExit(f"Bestand niet gevonden: {path}")
    body = read_source(path)
    title = args.title or path.stem.replace("-", " ").replace("_", " ").strip().capitalize()
    author = bootstrap_admin() or _user(config.ADMIN_USERNAME)
    post = create_post(author, title, body, args.topic, "published" if args.publish else "draft")
    print(f"Geimporteerd: {post['uid']} {post['title']}")


def joins_list(args):
    for row in list_join_requests(limit=1000):
        print(f"{row['created_at']}  {row['status']:<9}  {row['name']}  {row['contact']}  {row.get('repo_url') or '-'}")


def backups_list(args):
    for row in list_backups(limit=1000):
        print(f"{row['uid']}  {row['status']:<8}  {row['target']:<9}  {row.get('stored_name') or '-'}  {row.get('size_bytes') or 0}")


def backups_run(args):
    row = enqueue_backup(args.target, None)
    ok = process_backup(row, args.codec)
    print("klaar" if ok else "mislukt")
    return 0 if ok else 1


def backups_prune(args):
    count = prune_backups(args.keep, dry_run=args.dry_run)
    print(f"{count} archieven {'zouden worden verwijderd' if args.dry_run else 'verwijderd'}")


def backups_clear(args):
    count = clear_backups(dry_run=args.dry_run)
    print(f"{count} archieven {'zouden worden verwijderd' if args.dry_run else 'verwijderd'}")


def sessions_prune(args):
    print(f"{prune_expired_sessions(dry_run=args.dry_run)} verlopen sessies")


def audit_prune(args):
    cutoff = (datetime.now(timezone.utc) - timedelta(days=args.days)).isoformat()
    print(f"{prune_audit(cutoff, dry_run=args.dry_run)} auditregels ouder dan {args.days} dagen")


def system_prune(args):
    orphans = orphan_blobs()
    for path in orphans:
        print(("zou verwijderen: " if args.dry_run else "verwijderd: ") + str(path))
        if not args.dry_run:
            path.unlink(missing_ok=True)
    print(f"{len(orphans)} wees-blobs")


def system_sql_lint(args):
    problems = lint()
    for problem in problems:
        print(problem)
    print(f"{len(problems)} problemen")
    return 1 if problems else 0


def emoji_regenerate(args):
    print(write_js_module())