#!/usr/bin/env python3
"""Hocks Mieterportal – Beispieldaten-Generator.

Erzeugt deterministisch die Demo-Daten des Portals und schreibt sie nach
``src/data/generated.json`` (Units + Transaktionen). Die handschriftlichen
Inhalte (Tickets, Dokumente, Nachrichten, Ankündigungen) liegen weiterhin in
``src/data/seed.ts``.

Aufruf:  python beispieldaten.py          (Standard-Seed 20261002)
         python beispieldaten.py 42      (eigener Seed zum Experimentieren)

Achtung: Der Demo-Mieter „Anna Berger" (Whg. Hauptstraße 12 Nr. 7) und die
Algorithmen sind synchron zu src/data/seed.ts zu halten.
"""

import json
import sys
from pathlib import Path

SEED = int(sys.argv[1]) if len(sys.argv) > 1 else 20261002

BUILDINGS = [
    {"name": "Hauptstraße 12", "prefix": "HS", "count": 20, "baseRent": 9.8},
    {"name": "Ringweg 3", "prefix": "RW", "count": 15, "baseRent": 8.9},
    {"name": "Am Park 5", "prefix": "AP", "count": 15, "baseRent": 10.4},
]

FIRST_NAMES = [
    "Anna", "Jonas", "Marta", "Leon", "Sofia", "Felix", "Lena", "Paul",
    "Emma", "Noah", "Clara", "Ben", "Nora", "Max", "Julia", "Tim",
    "Sarah", "Finn", "Laura", "Jan", "Mia", "Tom", "Ela", "Kim",
]
LAST_NAMES = [
    "Berger", "Klein", "Wolf", "Neumann", "Schäfer", "Krüger", "Brandt",
    "Vogel", "Otto", "Horn", "Busch", "Thomas", "Pohl", "Sander", "Lindner",
]

DEMO_TENANT = "Anna Berger"
DEMO_UNIT_ID = "hs-7"

MONTHS = [
    "Januar", "Februar", "März", "April", "Mai", "Juni",
    "Juli", "August", "September", "Oktober", "November", "Dezember",
]


def gen_units() -> list[dict]:
    units: list[dict] = []
    name_idx = 0

    def next_name() -> str:
        nonlocal name_idx
        n = f"{FIRST_NAMES[name_idx % len(FIRST_NAMES)]} {LAST_NAMES[name_idx % len(LAST_NAMES)]}"
        name_idx += 1
        return n

    for b in BUILDINGS:
        for i in range(b["count"]):
            num = i + 1
            size = 38 + ((num * 7 + len(b["prefix"]) * 3) % 78)  # 38–115 m²
            cold = round(size * b["baseRent"])
            warm = cold + round(2.4 * size) + (35 if num % 3 == 0 else 0)
            floor = 0 if num <= 2 else min(4, (num - 1) // 4)
            occupied = num % 9 != 0  # ~89 % Vermietung
            if b["prefix"] == "HS" and num == 7:
                tenant: str | None = DEMO_TENANT
            elif occupied:
                tenant = next_name()
            else:
                tenant = None
            units.append({
                "id": f"{b['prefix'].lower()}-{num}",
                "building": b["name"],
                "number": str(num),
                "floor": floor,
                "size": size,
                "coldRent": cold,
                "warmRent": warm,
                "tenant": tenant,
                "status": "vermietet" if occupied else "frei",
            })
    return units


def gen_transactions(units: list[dict]) -> list[dict]:
    txs: list[dict] = []
    for u in units:
        if u["status"] != "vermietet":
            continue
        for m in range(12):
            due = m + 1
            if due <= 9:
                status = "überfällig" if (ord(u["id"][3]) + m) % 11 == 0 else "bezahlt"
            else:
                status = "offen"
            txs.append({
                "id": f"tx-{u['id']}-{m}",
                "unitId": u["id"],
                "tenant": u["tenant"],
                "month": MONTHS[m],
                "year": 2026,
                "amount": u["warmRent"],
                "type": "Miete",
                "status": status,
                **({"paidAt": f"0{(m % 8) + 1}.0{due}.2026"} if status == "bezahlt" else {}),
            })
    return txs


def main() -> None:
    units = gen_units()
    data = {
        "meta": {"seed": SEED, "units": len(units),
                 "rented": sum(1 for u in units if u["status"] == "vermietet")},
        "units": units,
        "transactions": gen_transactions(units),
    }
    out = Path(__file__).parent / "src" / "data" / "generated.json"
    out.write_text(json.dumps(data, ensure_ascii=False, indent=2), encoding="utf-8")
    print(f"{out} geschrieben: {data['meta']['units']} Wohnungen "
          f"({data['meta']['rented']} vermietet), {len(data['transactions'])} Buchungen")


if __name__ == "__main__":
    main()