"""Tests for :func:`app.scraper.media.download_call_recordings`.

Covers the call-recording batch downloader that localizes
``phone_call.record_file`` OSS URLs into the local object store, writes a
``Media`` row per blob, and links the call back via ``record_media_hash``.

* Happy path: one call -> downloaded, stored, upserted, linked.
* Idempotent: a call already carrying ``record_media_hash`` is excluded from
  the candidate set (``attempted == 0``).
* Resilient: a persistent 500 does NOT hang the loop (the per-run ``tried``
  set excludes the failing call_id from later batches) and returns
  ``(attempted=1, localized=0)`` with no exception escaping.
"""

from __future__ import annotations

import hashlib

import httpx
import respx
import sqlalchemy as sa
from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine

from app.db.base import Base
from app.db.models import Media, PhoneCall
from app.scraper.media import download_call_recordings
from app.session.yunke_client import YunkeClient
from app.storage.object_store import ObjectStore

BASE = "https://crm2.yunkecn.com"
# A realistic OSS recording URL (same shape as the yunke-pcfile call
# recordings): public GET, .mp3 suffix.
OSS_MP3 = (
    "https://yunke-pcfile.oss-cn-beijing.aliyuncs.com/wechat-call/8m0atd/"
    "x/ossCallback/a_b.mp3"
)

USERID = "a" * 32
COMPANY = "8m0atd"


# ---------------------------------------------------------------------------
# Shared helpers (mirror tests/test_media_downloader.py)
# ---------------------------------------------------------------------------


def _primed_client() -> YunkeClient:
    """A YunkeClient already in a logged-in state (login flow skipped)."""
    return YunkeClient(base_url=BASE, userid=USERID, company=COMPANY)


async def _make_engine():
    """Create an in-memory async SQLite engine with all tables created."""
    engine = create_async_engine("sqlite+aiosqlite:///:memory:")
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)
    return engine


# ---------------------------------------------------------------------------
# download_call_recordings
# ---------------------------------------------------------------------------


@respx.mock
async def test_download_call_recordings_localizes_and_links(tmp_path):
    """One call with an OSS mp3 record_file: downloaded, stored, linked.

    Returns ``(1, 1)``; the call's ``record_media_hash`` is the sha256 of the
    fetched bytes; a ``Media`` row exists with ``media_type='audio'``,
    ``mime_type='audio/mpeg'``, ``original_url == OSS_MP3``; the file exists
    under ``tmp_path`` at the sha256-content-addressed ``.mp3`` path.
    """
    store = ObjectStore(tmp_path)
    engine = await _make_engine()
    SessionLocal = async_sessionmaker(engine, expire_on_commit=False)

    blob = b"ID3\x04\x00\x00\x00\x00\x00\x00mp3-payload"
    respx.get(OSS_MP3).mock(return_value=httpx.Response(200, content=blob))

    client = _primed_client()
    try:
        async with SessionLocal() as session:
            session.add(
                PhoneCall(
                    call_id="c1", channel="voice_call", record_file=OSS_MP3
                )
            )
            await session.commit()

        async with SessionLocal() as session:
            attempted, localized = await download_call_recordings(
                client, store, session
            )
            await session.commit()

        assert (attempted, localized) == (1, 1)

        # File landed on disk at the sha256-content-addressed path with .mp3.
        expected_sha = hashlib.sha256(blob).hexdigest()
        expected_path = tmp_path / expected_sha[:2] / f"{expected_sha}.mp3"
        assert expected_path.is_file()
        assert expected_path.read_bytes() == blob

        async with SessionLocal() as session:
            call = (
                await session.execute(
                    sa.select(PhoneCall).where(PhoneCall.call_id == "c1")
                )
            ).scalar_one()
            assert call.record_media_hash == expected_sha

            media = (
                await session.execute(
                    sa.select(Media).where(Media.media_hash == expected_sha)
                )
            ).scalar_one()
            assert media.media_type == "audio"
            assert media.mime_type == "audio/mpeg"
            assert media.original_url == OSS_MP3
            assert media.local_path == str(expected_path)
            assert media.size_bytes == len(blob)
    finally:
        await client.aclose()
        await engine.dispose()


@respx.mock
async def test_idempotent_skip(tmp_path):
    """A call already carrying ``record_media_hash`` is excluded -> attempted 0.

    The WHERE clause filters ``record_media_hash IS NULL``, so a previously
    localized call is never re-fetched.
    """
    store = ObjectStore(tmp_path)
    engine = await _make_engine()
    SessionLocal = async_sessionmaker(engine, expire_on_commit=False)

    client = _primed_client()
    try:
        async with SessionLocal() as session:
            session.add(
                PhoneCall(
                    call_id="c2",
                    channel="voice_call",
                    record_file=OSS_MP3,
                    record_media_hash="already",
                )
            )
            await session.commit()

        async with SessionLocal() as session:
            attempted, localized = await download_call_recordings(
                client, store, session
            )
            await session.commit()

        assert (attempted, localized) == (0, 0)
        # No network was touched: the candidate set was empty.
        assert respx.calls.call_count == 0
    finally:
        await client.aclose()
        await engine.dispose()


@respx.mock
async def test_resilient_on_failure_and_no_infinite_loop(tmp_path):
    """A persistent 500: no exception, loop TERMINATES, ``(1, 0)`` returned.

    This is the key guard for the per-run ``tried`` set: without it, the
    failing row would stay ``record_media_hash IS NULL`` and be re-selected
    by every subsequent batch forever, hanging the run. The ``tried`` set
    excludes the attempted call_id from later batches, so the next SELECT
    returns an empty page and the loop breaks.
    """
    store = ObjectStore(tmp_path)
    engine = await _make_engine()
    SessionLocal = async_sessionmaker(engine, expire_on_commit=False)

    respx.get(OSS_MP3).mock(return_value=httpx.Response(500))

    client = _primed_client()
    try:
        async with SessionLocal() as session:
            session.add(
                PhoneCall(
                    call_id="c3", channel="voice_call", record_file=OSS_MP3
                )
            )
            await session.commit()

        async with SessionLocal() as session:
            attempted, localized = await download_call_recordings(
                client, store, session
            )
            await session.commit()

        assert (attempted, localized) == (1, 0)

        # The failing call is left un-localized (retried on the NEXT run).
        async with SessionLocal() as session:
            call = (
                await session.execute(
                    sa.select(PhoneCall).where(PhoneCall.call_id == "c3")
                )
            ).scalar_one()
            assert call.record_media_hash is None
    finally:
        await client.aclose()
        await engine.dispose()