import io
from pathlib import Path

from nisse_dev.canonical import PlanSubmitted, ToolCall, ToolResult, UserMessage
from nisse_dev.dump import main, render
from nisse_dev.oplog import OpLog
from nisse_dev.state import StateStore


def store_with_a_run(path: Path) -> None:
    store = StateStore(path, oplog=OpLog("nisse-dev", io.StringIO()))
    store.transition(
        "AWAIT_ARCH_SIGNOFF",
        cause="test",
        project="demo",
        data={"task_id": "demo-1", "gate": {"name": "arch", "rev": 1}},
    )
    store.append_event(UserMessage(text="Add a truncate helper", source="matrix"))
    store.append_event(PlanSubmitted(plan="x" * 500, model="opus"))
    store.append_event(
        ToolCall(call_id="c1", tool="run_command", arguments={"command": "ls"})
    )
    store.append_event(ToolResult(call_id="c1", result="README.md", success=False))
    store.begin_intent("open_pr", {"branch": "b"}, cause="test")
    store.close()


def test_the_dump_shows_state_intents_and_each_event(tmp_path: Path) -> None:
    db = tmp_path / "state.db"
    store_with_a_run(db)
    text = render(db)
    assert (
        "state: AWAIT_ARCH_SIGNOFF  project: demo  task: demo-1  gate: arch rev-1"
        in text
    )
    assert "pending intent #1 open_pr" in text
    assert "USER [matrix]: Add a truncate helper" in text
    assert "PLAN (opus, 500 chars): " in text and "[340 more]" in text
    assert 'CALL run_command {"command": "ls"}' in text
    assert "result (FAILED): README.md" in text


def test_full_shows_long_texts_whole(tmp_path: Path) -> None:
    db = tmp_path / "state.db"
    store_with_a_run(db)
    assert "x" * 500 in render(db, full=True)


def test_the_dump_never_writes_to_the_store(tmp_path: Path) -> None:
    db = tmp_path / "state.db"
    store_with_a_run(db)
    before = db.read_bytes()
    render(db)
    assert db.read_bytes() == before


def test_a_missing_store_is_reported(tmp_path: Path, capsys) -> None:
    assert main([str(tmp_path / "nope.db")]) == 1
    assert "no state store" in capsys.readouterr().err