"""Per-role transcript views (architecture L6; Development Plan M1.2)."""

import io
from collections.abc import Mapping
from pathlib import Path

from nisse_core.canonical import (
    AssistantText,
    DelegationCompleted,
    DelegationStarted,
    Fact,
    PlanSubmitted,
    StoredEvent,
    ToolCall,
    ToolResult,
    UserMessage,
)
from nisse_core.oplog import OpLog
from nisse_core.render import OpenAIChatRenderer
from nisse_core.render_anthropic import AnthropicMessagesRenderer
from nisse_core.state import StateStore


class Store(StateStore):
    """An agent's store: the helper is shown the driver's work as narration,
    the driver only the helper's report."""

    SHOWN: Mapping[str, Mapping[str, str]] = {
        "driver": {"helper": "report"},
        "helper": {"driver": "narrate"},
    }


def new_store(tmp_path: Path) -> StateStore:
    return Store(tmp_path / "state.db", oplog=OpLog("nisse-dev", io.StringIO()))


def texts(events: list[StoredEvent]) -> list[str]:
    return [getattr(e.event, "text", "") for e in events]


# --- the projection, per role ----------------------------------------------------


def delegated_milestone(store: StateStore) -> None:
    """A milestone in which the driver failed and handed off to a helper."""
    store.transcript("a", "driver").append(PlanSubmitted(plan="1. fix it", model="y"))
    driver = store.transcript("a", "driver")
    driver.append(
        ToolCall(call_id="e1", tool="run_command", arguments={"command": "make"})
    )
    driver.append(ToolResult(call_id="e1", result="error: missing ;", success=False))
    helper = driver.as_actor("helper")
    helper.append(
        DelegationStarted(brief="make fails", role="helper", model="y", caps={})
    )
    helper.append(AssistantText(text="looking at main.c", model="y"))
    helper.append(
        ToolCall(call_id="h1", tool="read_file", arguments={"path": "main.c"})
    )
    helper.append(ToolResult(call_id="h1", result="int main()", success=True))
    helper.append(
        DelegationCompleted(
            handback="fixed the missing semicolon",
            artifacts=["main.c"],
            tokens=0,
            duration_s=1.0,
            exit_status="completed",
        )
    )


def test_the_driver_sees_the_helpers_report_not_its_turns(tmp_path: Path) -> None:
    store = new_store(tmp_path)
    delegated_milestone(store)
    view = store.transcript("a", "driver").view()
    assert [type(e.event).__name__ for e in view] == [
        "ToolCall",
        "ToolResult",
        "UserMessage",
    ]
    assert view[-1].event.text == (
        "[helper report, completed] fixed the missing semicolon"
    )


def test_the_helper_sees_the_plan_and_the_drivers_work_as_narration(
    tmp_path: Path,
) -> None:
    store = new_store(tmp_path)
    delegated_milestone(store)
    view = store.transcript("a", "helper").view()
    said = texts(view)
    assert said[0] == "[approved plan] 1. fix it"
    assert said[1] == "[driver] run_command(make) → failed: error: missing ;"
    # Its own events are unchanged, tool calls and all.
    assert any(isinstance(e.event, ToolCall) and e.event.call_id == "h1" for e in view)
    assert not any(
        isinstance(e.event, ToolCall) and e.event.call_id == "e1" for e in view
    )


def test_a_view_keeps_log_ids_so_cursors_still_work(tmp_path: Path) -> None:
    store = new_store(tmp_path)
    delegated_milestone(store)
    raw = store.transcript("a", "driver").read()
    view = store.transcript("a", "driver").view(after=raw[2].id)
    assert [e.id for e in view] == [raw[-1].id]  # the helper's report


# --- rendering ---------------------------------------------------------------------


def test_both_renderers_show_a_fact_as_a_labelled_user_message() -> None:
    events = [StoredEvent(id=1, ts="", event=Fact(text="PR #3 opened"))]
    openai = OpenAIChatRenderer().render(events, tools=None, model="m")
    assert openai["messages"] == [
        {"role": "user", "content": "[orchestrator] PR #3 opened"}
    ]
    anthropic = AnthropicMessagesRenderer().render(events, tools=None, model="m")
    assert anthropic["messages"] == [
        {
            "role": "user",
            "content": [{"type": "text", "text": "[orchestrator] PR #3 opened"}],
        }
    ]


def test_operator_messages_carry_their_channel(tmp_path: Path) -> None:
    store = new_store(tmp_path)
    operator = store.transcript("a", "operator")
    for source in ("transport:@don", "gitea:issue:9:comment:4", "gitea:comment:5"):
        operator.append(UserMessage(text="hi", source=source))
    assert texts(store.transcript("a", "driver").view()) == [
        "[operator, Matrix] hi",
        "[operator, comment on plan issue #9] hi",
        "[operator, Gitea comment] hi",
    ]


def test_something_written_mid_call_moves_after_the_result(tmp_path: Path) -> None:
    # Live, M2.1: start_milestone's fact landed between the call and its
    # result, and the model API rejected every later request in the run.
    store = new_store(tmp_path)
    driver = store.transcript("a", "driver")
    driver.append(ToolCall(call_id="c1", tool="start_milestone", arguments={}))
    store.transcript("a", "orchestrator").append(Fact(text="milestone 1 started"))
    driver.append(ToolResult(call_id="c1", result="started", success=True))
    kinds = [type(e.event).__name__ for e in driver.view()]
    assert kinds == ["ToolCall", "ToolResult", "UserMessage"]
    body = AnthropicMessagesRenderer().render(driver.view(), tools=None, model="m")
    result_first = body["messages"][1]["content"][0]
    assert result_first["type"] == "tool_result"