"""Tests for app.core.output_formatter — HomeFormatter and PopupFormatter."""

from __future__ import annotations

import pytest

from app.core.output_formatter import HomeFormatter, PopupFormatter
from app.schemas import (
    WsPopupDomain,
    WsStreamBlock,
    WsStreamEnd,
    WsStreamStart,
    WsStreamText,
)


# ── helpers ───────────────────────────────────────────────────────────────────

async def _stream(*pairs: tuple[str, str]):
    """Async generator that yields (agent_name, token) pairs."""
    for pair in pairs:
        yield pair


async def collect(formatter, token_stream):
    frames = []
    async for frame in formatter.format(token_stream):
        frames.append(frame)
    return frames


# ── HomeFormatter ─────────────────────────────────────────────────────────────

@pytest.mark.asyncio
async def test_home_formatter_text_block():
    req_id = "req-1"
    tokens = [
        ("task_agent", '{"type": "text", "content": "Hello world"}'),
    ]
    formatter = HomeFormatter(request_id=req_id, tool_results=[])
    frames = await collect(formatter, _stream(*tokens))

    assert isinstance(frames[0], WsStreamStart)
    assert frames[0].request_id == req_id
    text_frames = [f for f in frames if isinstance(f, WsStreamText)]
    assert any("Hello world" in f.chunk for f in text_frames)
    assert isinstance(frames[-1], WsStreamEnd)


@pytest.mark.asyncio
async def test_home_formatter_chart_block():
    req_id = "req-2"
    chart_json = (
        '{"type": "chart", "chartType": "bar", '
        '"title": "Tasks", "data": [{"x": 1}], '
        '"config": {"x": {"label": "X", "color": "#fff"}}}'
    )
    formatter = HomeFormatter(request_id=req_id, tool_results=[])
    frames = await collect(formatter, _stream(("task_agent", chart_json)))

    block_frames = [f for f in frames if isinstance(f, WsStreamBlock)]
    assert len(block_frames) == 1
    assert block_frames[0].block_type == "chart"
    assert block_frames[0].data["chartType"] == "bar"


@pytest.mark.asyncio
async def test_home_formatter_invalid_chart_skipped():
    req_id = "req-3"
    bad_chart = '{"type": "chart", "chartType": "unknown", "data": []}'
    formatter = HomeFormatter(request_id=req_id, tool_results=[])
    frames = await collect(formatter, _stream(("task_agent", bad_chart)))

    block_frames = [f for f in frames if isinstance(f, WsStreamBlock)]
    assert len(block_frames) == 0  # invalid chart skipped


@pytest.mark.asyncio
async def test_home_formatter_entity_ref_resolved():
    req_id = "req-4"
    tool_results = [{"entity": "task", "id": "t1", "title": "My Task"}]
    entity_json = '{"type": "entity_ref", "entity": "task"}'
    formatter = HomeFormatter(request_id=req_id, tool_results=tool_results)
    frames = await collect(formatter, _stream(("task_agent", entity_json)))

    block_frames = [f for f in frames if isinstance(f, WsStreamBlock)]
    assert len(block_frames) == 1
    assert block_frames[0].data["entity"] == "task"
    assert block_frames[0].data["items"][0]["id"] == "t1"


@pytest.mark.asyncio
async def test_home_formatter_entity_ref_missing_skipped():
    req_id = "req-5"
    entity_json = '{"type": "entity_ref", "entity": "task"}'
    formatter = HomeFormatter(request_id=req_id, tool_results=[])
    frames = await collect(formatter, _stream(("task_agent", entity_json)))

    block_frames = [f for f in frames if isinstance(f, WsStreamBlock)]
    assert len(block_frames) == 0  # no tool results → skipped


@pytest.mark.asyncio
async def test_home_formatter_table_block():
    req_id = "req-6"
    table_json = '{"type": "table", "headers": ["A", "B"], "rows": [["1", "2"]]}'
    formatter = HomeFormatter(request_id=req_id, tool_results=[])
    frames = await collect(formatter, _stream(("task_agent", table_json)))

    block_frames = [f for f in frames if isinstance(f, WsStreamBlock)]
    assert len(block_frames) == 1
    assert block_frames[0].block_type == "table"


@pytest.mark.asyncio
async def test_home_formatter_timeline_block():
    req_id = "req-7"
    timeline_json = '{"type": "timeline", "checkpoints": [{"id": "c1", "title": "M1", "date": 123}]}'
    formatter = HomeFormatter(request_id=req_id, tool_results=[])
    frames = await collect(formatter, _stream(("task_agent", timeline_json)))

    block_frames = [f for f in frames if isinstance(f, WsStreamBlock)]
    assert len(block_frames) == 1
    assert block_frames[0].block_type == "timeline"


@pytest.mark.asyncio
async def test_home_formatter_frame_order():
    """stream_start is first, stream_end is last."""
    req_id = "req-8"
    formatter = HomeFormatter(request_id=req_id, tool_results=[])
    frames = await collect(formatter, _stream(("task_agent", '{"type": "text", "content": "Hi"}')))
    assert isinstance(frames[0], WsStreamStart)
    assert isinstance(frames[-1], WsStreamEnd)


# ── PopupFormatter ────────────────────────────────────────────────────────────

@pytest.mark.asyncio
async def test_popup_formatter_domain_emitted_first():
    req_id = "pop-1"
    formatter = PopupFormatter(request_id=req_id)
    tokens = [
        ("task_agent", ""),   # domain signal
        ("task_agent", "Hello"),
        ("task_agent", " there"),
    ]
    frames = await collect(formatter, _stream(*tokens))

    assert isinstance(frames[0], WsPopupDomain)
    assert frames[0].domain == "tasks"
    assert frames[0].request_id == req_id


@pytest.mark.asyncio
async def test_popup_formatter_text_only():
    req_id = "pop-2"
    formatter = PopupFormatter(request_id=req_id)
    tokens = [("checkpoint_agent", ""), ("checkpoint_agent", "Summary")]
    frames = await collect(formatter, _stream(*tokens))

    assert isinstance(frames[0], WsPopupDomain)
    assert frames[0].domain == "checkpoints"
    text_frames = [f for f in frames if isinstance(f, WsStreamText)]
    assert len(text_frames) == 1
    assert text_frames[0].chunk == "Summary"


@pytest.mark.asyncio
async def test_popup_formatter_no_block_frames():
    """PopupFormatter must never emit WsStreamBlock."""
    req_id = "pop-3"
    formatter = PopupFormatter(request_id=req_id)
    tokens = [
        ("note_agent", ""),
        ("note_agent", '{"type": "chart", "chartType": "bar", "data": []}'),
    ]
    frames = await collect(formatter, _stream(*tokens))
    assert not any(isinstance(f, WsStreamBlock) for f in frames)


@pytest.mark.asyncio
async def test_popup_formatter_end_frame():
    req_id = "pop-4"
    formatter = PopupFormatter(request_id=req_id)
    frames = await collect(formatter, _stream(("project_agent", ""), ("project_agent", "Done")))
    assert isinstance(frames[-1], WsStreamEnd)


@pytest.mark.asyncio
async def test_popup_formatter_unknown_agent_defaults_to_tasks():
    req_id = "pop-5"
    formatter = PopupFormatter(request_id=req_id)
    frames = await collect(formatter, _stream(("unknown_agent", ""), ("unknown_agent", "hi")))
    assert frames[0].domain == "tasks"