"""SDK message-read helpers: envelope + raw header access (SPEC §11)."""

from __future__ import annotations

import uuid
from datetime import UTC, datetime
from email.message import EmailMessage

from sqlalchemy import delete
from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
from sqlalchemy.pool import NullPool

from app.config import get_settings
from app.identity.passwords import hash_password
from app.indexer import blobstore
from app.models import Account, Mailbox, Message, User
from app.plugins.sdk import sdk


async def test_messages_header_reads_raw_header() -> None:
    engine = create_async_engine(get_settings().database_url, poolclass=NullPool)
    sm = async_sessionmaker(engine, expire_on_commit=False)
    async with sm() as s:
        user = User(
            handle=f"hd{uuid.uuid4().hex[:8]}@test.local", password_hash=hash_password("pw")
        )
        s.add(user)
        await s.flush()
        account = Account(
            user_id=user.id, email="me@example.com", imap_config={}, smtp_config={},
            secret_ct=b"", discovery_src="manual",
        )
        s.add(account)
        await s.flush()
        mbox = Mailbox(account_id=account.id, user_id=user.id, path="INBOX", special_use="inbox")
        s.add(mbox)
        await s.flush()

        raw = EmailMessage()
        raw["Subject"] = "Weekly digest"
        raw["From"] = "news@list.example"
        raw["List-Unsubscribe"] = "<https://list.example/unsub?u=42>"
        raw.set_content("hello")
        sha = blobstore.store(user.id, raw.as_bytes())

        msg = Message(
            user_id=user.id, account_id=account.id, mailbox_id=mbox.id, uid=1,
            subject="Weekly digest", flags=[], internal_date=datetime.now(UTC), blob_sha256=sha,
        )
        s.add(msg)
        await s.commit()
        user_id, message_id = user.id, msg.id

    try:
        messages = sdk("unsubscribe").messages
        assert await messages.header(user_id, message_id, "List-Unsubscribe") == (
            "<https://list.example/unsub?u=42>"
        )
        assert await messages.header(user_id, message_id, "X-Nope") is None
        assert await messages.header(user_id, uuid.uuid4(), "List-Unsubscribe") is None
        # Another user can't read this message's headers.
        assert await messages.header(uuid.uuid4(), message_id, "List-Unsubscribe") is None
    finally:
        async with sm() as s:
            await s.execute(delete(User).where(User.id == user_id))
            await s.commit()
        await engine.dispose()