from __future__ import annotations

import tempfile
from pathlib import Path

from django.test import TestCase

from pobsync.config.load import load_global_config, load_host_config
from pobsync_backend.config_repository import export_runtime_configs
from pobsync_backend.models import GlobalConfig, HostConfig


class ConfigRepositoryTests(TestCase):
    def test_exports_database_configs_to_engine_yaml(self) -> None:
        with tempfile.TemporaryDirectory() as tmp:
            prefix = Path(tmp)
            GlobalConfig.objects.create(
                name="default",
                backup_root="/backups",
                pobsync_home=str(prefix),
                ssh_user="backup",
                ssh_port=2222,
                rsync_args=["--archive"],
                excludes_default=["/proc/***"],
                retention_daily=7,
                retention_weekly=4,
                retention_monthly=3,
                retention_yearly=1,
                data={
                    "backup_root": "/ignored",
                    "pobsync_home": "/ignored",
                    "ssh": {"user": "ignored", "port": 22, "options": []},
                    "unknown": "must-not-leak",
                    "retention_defaults": {"daily": 99, "weekly": 99, "monthly": 99, "yearly": 99},
                },
            )
            HostConfig.objects.create(
                host="web-01",
                address="web-01.example.test",
                ssh_user="root",
                includes=[],
                excludes_add=["/tmp/***"],
                retention_daily=7,
                retention_weekly=4,
                retention_monthly=3,
                retention_yearly=1,
                config={
                    "host": "ignored",
                    "address": "ignored",
                    "retention": {"daily": 99, "weekly": 99, "monthly": 99, "yearly": 99},
                    "excludes_add": ["/ignored/***"],
                    "unknown": "must-not-leak",
                },
            )

            written = export_runtime_configs(prefix=prefix, host="web-01")

            self.assertEqual(len(written), 2)
            global_cfg = load_global_config(prefix / "config" / "global.yaml")
            host_cfg = load_host_config(prefix / "config" / "hosts" / "web-01.yaml")
            self.assertEqual(global_cfg["backup_root"], "/backups")
            self.assertEqual(global_cfg["pobsync_home"], str(prefix))
            self.assertEqual(global_cfg["ssh"]["user"], "backup")
            self.assertEqual(global_cfg["ssh"]["port"], 2222)
            self.assertEqual(global_cfg["retention_defaults"]["daily"], 7)
            self.assertEqual(host_cfg["host"], "web-01")
            self.assertEqual(host_cfg["address"], "web-01.example.test")
            self.assertEqual(host_cfg["retention"]["daily"], 7)
            self.assertEqual(host_cfg["excludes_add"], ["/tmp/***"])
            self.assertNotIn("unknown", global_cfg)
            self.assertNotIn("unknown", host_cfg)