"""Tests for configuration loading and proxy URL parsing."""

import pytest

from s5p.config import ChainHop, Config, load_config, parse_api_proxies, parse_proxy_url


class TestParseProxyUrl:
    """Test proxy URL parsing."""

    def test_socks5_basic(self):
        hop = parse_proxy_url("socks5://127.0.0.1:9050")
        assert hop.proto == "socks5"
        assert hop.host == "127.0.0.1"
        assert hop.port == 9050
        assert hop.username is None
        assert hop.password is None

    def test_socks5_with_auth(self):
        hop = parse_proxy_url("socks5://user:pass@proxy.example.com:1080")
        assert hop.proto == "socks5"
        assert hop.host == "proxy.example.com"
        assert hop.port == 1080
        assert hop.username == "user"
        assert hop.password == "pass"

    def test_socks4(self):
        hop = parse_proxy_url("socks4://10.0.0.1:1080")
        assert hop.proto == "socks4"
        assert hop.host == "10.0.0.1"
        assert hop.port == 1080

    def test_http_connect(self):
        hop = parse_proxy_url("http://proxy:8080")
        assert hop.proto == "http"
        assert hop.host == "proxy"
        assert hop.port == 8080

    def test_default_port_socks5(self):
        hop = parse_proxy_url("socks5://host")
        assert hop.port == 1080

    def test_default_port_http(self):
        hop = parse_proxy_url("http://host")
        assert hop.port == 8080

    def test_unsupported_protocol(self):
        with pytest.raises(ValueError, match="unsupported protocol"):
            parse_proxy_url("ftp://host:21")

    def test_missing_host(self):
        with pytest.raises(ValueError, match="missing host"):
            parse_proxy_url("socks5://")


class TestChainHop:
    """Test ChainHop string representation."""

    def test_str_without_auth(self):
        hop = ChainHop(proto="socks5", host="localhost", port=9050)
        assert str(hop) == "socks5://localhost:9050"

    def test_str_with_auth(self):
        hop = ChainHop(proto="http", host="proxy", port=8080, username="u", password="p")
        assert str(hop) == "http://u@proxy:8080"


class TestParseApiProxies:
    """Test API response proxy parsing."""

    def test_valid_entries(self):
        data = {
            "proxies": [
                {"proto": "socks5", "proxy": "1.2.3.4:1080"},
                {"proto": "http", "proxy": "5.6.7.8:8080"},
            ],
        }
        result = parse_api_proxies(data)
        assert len(result) == 2
        assert result[0] == ChainHop(proto="socks5", host="1.2.3.4", port=1080)
        assert result[1] == ChainHop(proto="http", host="5.6.7.8", port=8080)

    def test_skips_invalid_proto(self):
        data = {"proxies": [{"proto": "ftp", "proxy": "1.2.3.4:21"}]}
        assert parse_api_proxies(data) == []

    def test_skips_missing_proto(self):
        data = {"proxies": [{"proxy": "1.2.3.4:1080"}]}
        assert parse_api_proxies(data) == []

    def test_skips_missing_colon(self):
        data = {"proxies": [{"proto": "socks5", "proxy": "no-port"}]}
        assert parse_api_proxies(data) == []

    def test_skips_bad_port(self):
        data = {"proxies": [{"proto": "socks5", "proxy": "1.2.3.4:abc"}]}
        assert parse_api_proxies(data) == []

    def test_empty_proxies(self):
        assert parse_api_proxies({"proxies": []}) == []

    def test_missing_proxies_key(self):
        assert parse_api_proxies({}) == []

    def test_mixed_valid_invalid(self):
        data = {
            "proxies": [
                {"proto": "socks5", "proxy": "1.2.3.4:1080"},
                {"proto": "ftp", "proxy": "bad:21"},
                {"proto": "socks4", "proxy": "5.6.7.8:1080"},
            ],
        }
        result = parse_api_proxies(data)
        assert len(result) == 2
        assert result[0].proto == "socks5"
        assert result[1].proto == "socks4"


class TestConfig:
    """Test Config defaults."""

    def test_defaults(self):
        c = Config()
        assert c.listen_host == "127.0.0.1"
        assert c.listen_port == 1080
        assert c.chain == []
        assert c.timeout == 10.0
        assert c.max_connections == 256
        assert c.pool_size == 0
        assert c.pool_max_idle == 30.0

    def test_max_connections_from_yaml(self, tmp_path):
        cfg_file = tmp_path / "test.yaml"
        cfg_file.write_text("max_connections: 512\n")
        c = load_config(cfg_file)
        assert c.max_connections == 512

    def test_pool_size_from_yaml(self, tmp_path):
        cfg_file = tmp_path / "test.yaml"
        cfg_file.write_text("pool_size: 16\npool_max_idle: 45.0\n")
        c = load_config(cfg_file)
        assert c.pool_size == 16
        assert c.pool_max_idle == 45.0