import base64
from io import BytesIO
from types import SimpleNamespace

import pytest

from astrbot.api.message_components import Image, Record
from astrbot.core.message.message_event_result import MessageChain
from astrbot.core.platform.sources.discord import (
    discord_platform_adapter,
    discord_platform_event,
)
from astrbot.core.platform.sources.discord.discord_platform_adapter import (
    DiscordPlatformAdapter,
)
from astrbot.core.platform.sources.discord.discord_platform_event import (
    DiscordPlatformEvent,
)

_PNG_BYTES = base64.b64decode(
    "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMCAO+/p9sAAAAASUVORK5CYII="
)
_WAV_BYTES = b"RIFF\x24\x00\x00\x00WAVEfmt " + b"\x00" * 16
_WAV_PATH = "/tmp/discord_voice.wav"


@pytest.mark.asyncio
async def test_discord_audio_attachment_resolves_to_wav_record(monkeypatch):
    class FakeMediaResolver:
        def __init__(self, media_ref: str, **kwargs) -> None:
            assert media_ref == "https://cdn.example/voice.ogg"
            assert kwargs["media_type"] == "audio"

        async def to_path(self, **kwargs) -> str:
            assert kwargs["target_format"] == "wav"
            return _WAV_PATH

    monkeypatch.setattr(
        discord_platform_adapter,
        "MediaResolver",
        FakeMediaResolver,
    )

    adapter = DiscordPlatformAdapter.__new__(DiscordPlatformAdapter)
    adapter.bot_self_id = "1"
    adapter.client = SimpleNamespace(user=SimpleNamespace(id=1))

    message = SimpleNamespace(
        id=42,
        content="",
        channel=SimpleNamespace(id=123, guild=None),
        author=SimpleNamespace(id=2, display_name="tester"),
        attachments=[
            SimpleNamespace(
                content_type="audio/ogg",
                filename="voice.ogg",
                url="https://cdn.example/voice.ogg",
            )
        ],
        guild=None,
        role_mentions=[],
    )

    abm = await adapter.convert_message({"message": message})

    assert len(abm.message) == 1
    assert isinstance(abm.message[0], Record)
    assert abm.message[0].file == _WAV_PATH
    assert abm.message[0].url == _WAV_PATH
    assert abm.message[0].path == _WAV_PATH


@pytest.mark.asyncio
async def test_discord_send_image_resolves_data_uri_with_media_resolver(monkeypatch):
    captured = {}

    class FakeDiscordFile:
        def __init__(self, fp: BytesIO, filename: str) -> None:
            captured["bytes"] = fp.read()
            captured["filename"] = filename

    monkeypatch.setattr(discord_platform_event.discord, "File", FakeDiscordFile)

    event = DiscordPlatformEvent.__new__(DiscordPlatformEvent)
    image_base64 = base64.b64encode(_PNG_BYTES).decode("ascii")

    content, files, view, embeds, reference_message_id = await event._parse_to_discord(
        MessageChain(
            chain=[
                Image(file=f"data:image/png;base64,{image_base64}"),
            ]
        )
    )

    assert content == ""
    assert len(files) == 1
    assert captured["bytes"] == _PNG_BYTES
    assert captured["filename"] == "image.png"
    assert view is None
    assert embeds == []
    assert reference_message_id is None


@pytest.mark.asyncio
async def test_discord_send_record_resolves_audio_with_media_resolver(monkeypatch):
    captured = {}

    class FakeDiscordFile:
        def __init__(self, fp: BytesIO, filename: str) -> None:
            captured["bytes"] = fp.read()
            captured["filename"] = filename

    monkeypatch.setattr(discord_platform_event.discord, "File", FakeDiscordFile)

    event = DiscordPlatformEvent.__new__(DiscordPlatformEvent)
    audio_base64 = base64.b64encode(_WAV_BYTES).decode("ascii")

    content, files, view, embeds, reference_message_id = await event._parse_to_discord(
        MessageChain(
            chain=[
                Record.fromBase64(audio_base64),
            ]
        )
    )

    assert content == ""
    assert len(files) == 1
    assert captured["bytes"] == _WAV_BYTES
    assert captured["filename"] == "audio.wav"
    assert view is None
    assert embeds == []
    assert reference_message_id is None