import os

import pytest

from pve_backup_report.config import ConfigError, load_config, parse_pbs_servers


def test_load_config_from_env_file(tmp_path, monkeypatch) -> None:
    env_file = tmp_path / ".env"
    env_file.write_text(
        "\n".join(
            [
                "PVE_API_URL=https://pve.example.invalid:8006",
                "PVE_API_TOKEN_ID=backup-report@pve!report",
                "PVE_API_TOKEN_SECRET=secret",
                "PVE_VERIFY_TLS=false",
                "PVE_TIMEOUT_SECONDS=10",
                "PBS_HOSTNAMES=192.0.2.10=backup-a,192.0.2.11=backup-b",
            ]
        ),
        encoding="utf-8",
    )
    monkeypatch.delenv("PVE_API_URL", raising=False)
    monkeypatch.delenv("PVE_API_TOKEN_ID", raising=False)
    monkeypatch.delenv("PVE_API_TOKEN_SECRET", raising=False)
    monkeypatch.delenv("REPORT_LANGUAGE", raising=False)
    for key in list(os.environ):
        if key.startswith("PBS") and key != "PBS_HOSTNAMES":
            monkeypatch.delenv(key, raising=False)

    config = load_config(env_file)

    assert config.pve_api_url == "https://pve.example.invalid:8006"
    assert config.pve_verify_tls is False
    assert config.pve_timeout_seconds == 10
    assert config.pve_backup_jobs_endpoint == "/cluster/backup"
    assert config.pve_task_history_limit == 500
    assert config.pve_task_log_limit == 5000
    assert config.report_language == "fr"
    assert config.configured_pbs_servers == ()
    assert config.pbs_hostnames == {
        "192.0.2.10": "backup-a",
        "192.0.2.11": "backup-b",
    }


def test_parse_pbs_servers_detects_unbounded_numeric_prefixes() -> None:
    servers = parse_pbs_servers(
        {
            "PBS10_NAME": "PBS10",
            "PBS10_API_URL": "https://backup-j.example.invalid:8007",
            "PBS10_API_TOKEN_ID": "backup-report@pbs!report",
            "PBS10_API_TOKEN_SECRET": "secret10",
            "PBS02_NAME": "PBS02",
            "PBS02_API_URL": "https://backup-b.example.invalid:8007",
            "PBS02_API_TOKEN_ID": "backup-report@pbs!report",
            "PBS02_API_TOKEN_SECRET": "secret2",
        },
        pve_verify_tls=True,
        pve_timeout_seconds=30,
    )

    assert [server.prefix for server in servers] == ["PBS02", "PBS10"]
    assert [server.name for server in servers] == ["PBS02", "PBS10"]
    assert [server.api_url for server in servers] == [
        "https://backup-b.example.invalid:8007",
        "https://backup-j.example.invalid:8007",
    ]


def test_parse_pbs_servers_rejects_incomplete_api_block() -> None:
    with pytest.raises(ConfigError, match="configuration PBS04 incomplete"):
        parse_pbs_servers(
            {
                "PBS04_API_URL": "https://backup-d.example.invalid:8007",
                "PBS04_API_TOKEN_ID": "backup-report@pbs!report",
            },
            pve_verify_tls=True,
            pve_timeout_seconds=30,
        )


def test_load_config_accepts_report_language(tmp_path, monkeypatch) -> None:
    env_file = tmp_path / ".env"
    env_file.write_text(
        "\n".join(
            [
                "PVE_API_URL=https://pve.example.invalid:8006",
                "PVE_API_TOKEN_ID=backup-report@pve!report",
                "PVE_API_TOKEN_SECRET=secret",
                "REPORT_LANGUAGE=en",
            ]
        ),
        encoding="utf-8",
    )
    monkeypatch.delenv("PVE_API_URL", raising=False)
    monkeypatch.delenv("PVE_API_TOKEN_ID", raising=False)
    monkeypatch.delenv("PVE_API_TOKEN_SECRET", raising=False)
    monkeypatch.delenv("REPORT_LANGUAGE", raising=False)

    config = load_config(env_file)

    assert config.report_language == "en"


def test_load_config_rejects_invalid_report_language(tmp_path, monkeypatch) -> None:
    env_file = tmp_path / ".env"
    env_file.write_text(
        "\n".join(
            [
                "PVE_API_URL=https://pve.example.invalid:8006",
                "PVE_API_TOKEN_ID=backup-report@pve!report",
                "PVE_API_TOKEN_SECRET=secret",
                "REPORT_LANGUAGE=de",
            ]
        ),
        encoding="utf-8",
    )
    monkeypatch.delenv("PVE_API_URL", raising=False)
    monkeypatch.delenv("PVE_API_TOKEN_ID", raising=False)
    monkeypatch.delenv("PVE_API_TOKEN_SECRET", raising=False)
    monkeypatch.delenv("REPORT_LANGUAGE", raising=False)

    with pytest.raises(ConfigError, match="REPORT_LANGUAGE doit valoir fr ou en"):
        load_config(env_file)