"""Tests for SusiMail — TDD: tests before implementation."""

import pytest
from i2p_apps.susimail.config import MailConfig
from i2p_apps.susimail.message import MailMessage, parse_email
from i2p_apps.susimail.folder import MailFolder


class TestMailConfig:
    def test_defaults(self):
        cfg = MailConfig()
        assert cfg.pop3_host == "127.0.0.1"
        assert cfg.pop3_port == 7660
        assert cfg.smtp_host == "127.0.0.1"
        assert cfg.smtp_port == 7659

    def test_custom(self):
        cfg = MailConfig(pop3_port=1110, smtp_port=2525)
        assert cfg.pop3_port == 1110
        assert cfg.smtp_port == 2525

    def test_identity(self):
        cfg = MailConfig(identity="user@mail.i2p")
        assert cfg.identity == "user@mail.i2p"


class TestMailMessage:
    def test_creation(self):
        msg = MailMessage(
            sender="alice@mail.i2p",
            recipient="bob@mail.i2p",
            subject="Hello",
            body="Test message",
        )
        assert msg.sender == "alice@mail.i2p"
        assert msg.subject == "Hello"

    def test_parse_email(self):
        raw = (
            "From: alice@mail.i2p\r\n"
            "To: bob@mail.i2p\r\n"
            "Subject: Test\r\n"
            "\r\n"
            "Hello world\r\n"
        )
        msg = parse_email(raw)
        assert msg.sender == "alice@mail.i2p"
        assert msg.recipient == "bob@mail.i2p"
        assert msg.subject == "Test"
        assert "Hello world" in msg.body

    def test_parse_minimal(self):
        raw = "From: x@y\r\nTo: a@b\r\nSubject: s\r\n\r\nbody"
        msg = parse_email(raw)
        assert msg.sender == "x@y"
        assert msg.body == "body"


class TestMailFolder:
    def test_creation(self):
        folder = MailFolder(name="Inbox")
        assert folder.name == "Inbox"
        assert len(folder.messages) == 0

    def test_add_message(self):
        folder = MailFolder(name="Inbox")
        msg = MailMessage("a@b", "c@d", "Test", "body")
        folder.add(msg)
        assert len(folder.messages) == 1

    def test_delete_message(self):
        folder = MailFolder(name="Inbox")
        msg = MailMessage("a@b", "c@d", "Test", "body")
        folder.add(msg)
        folder.delete(0)
        assert len(folder.messages) == 0

    def test_delete_out_of_range(self):
        folder = MailFolder(name="Inbox")
        with pytest.raises(IndexError):
            folder.delete(0)