"""Regression: event factory shapes (UI relies on these field names)."""

from api.analyses.types import Finding
from api.runtime import events


def test_run_start_shape():
    e = events.run_start("why?")
    assert e == {"type": "run_start", "question": "why?"}


def test_run_end_shape():
    assert events.run_end(answer="42") == {"type": "run_end", "answer": "42", "error": None}
    assert events.run_end(error="boom") == {"type": "run_end", "answer": "", "error": "boom"}


def test_plan_ready_shape():
    e = events.plan_ready("rat", [{"analysis": "x", "args": {}, "why": ""}])
    assert e["type"] == "plan_ready"
    assert e["rationale"] == "rat"
    assert isinstance(e["steps"], list)


def test_analysis_start_shape():
    e = events.analysis_start("direct_answer", {"q": "?"}, "fits")
    assert e == {
        "type": "analysis_start",
        "analysis": "direct_answer",
        "args": {"q": "?"},
        "why": "fits",
    }


def test_analysis_end_uses_finding():
    f = Finding(analysis="direct_answer", summary="ok", rows=[{"a": 1}], sql=["SELECT 1"])
    e = events.analysis_end("direct_answer", f)
    assert e["type"] == "analysis_end"
    assert e["analysis"] == "direct_answer"
    assert e["summary"] == "ok"
    assert e["error"] is None
    assert e["row_count"] == 1


def test_tool_call_shapes():
    s = events.tool_call_start("text_to_sql", input={"q": "?"})
    assert s == {"type": "tool_call_start", "tool": "text_to_sql", "input": {"q": "?"}}
    e = events.tool_call_end("text_to_sql", output={"sql": "..."})
    assert e == {"type": "tool_call_end", "tool": "text_to_sql", "output": {"sql": "..."}, "error": None}


def test_synth_start_shape():
    assert events.synth_start() == {"type": "synth_start"}


def test_sse_format_round_trip():
    payload = events.tool_call_start("t", input={"x": 1})
    formatted = events.sse_format(payload)
    assert formatted.startswith("event: tool_call_start\n")
    assert "data: " in formatted
    assert formatted.endswith("\n\n")