"""Core data types for ToolUse.1.

Errors are values: parsers return `Result` objects instead of raising, so the
harness can report *why* a model failed rather than crashing mid-run.
"""

from __future__ import annotations

import json
from dataclasses import dataclass, field
from typing import Any, Literal, Mapping, Sequence

Role = Literal["system", "user", "assistant", "tool"]

Lang = Literal["en", "ru"]

Protocol = Literal["json", "xml", "plain"]

PROTOCOLS: tuple[Protocol, ...] = ("json", "xml", "plain")


@dataclass(frozen=True)
class Message:
    role: Role
    content: str
    tool_name: str | None = None
    tool_args: Mapping[str, Any] | None = None

    def to_dict(self) -> dict[str, Any]:
        out: dict[str, Any] = {"role": self.role, "content": self.content}
        if self.tool_name is not None:
            out["tool_name"] = self.tool_name
        if self.tool_args is not None:
            out["tool_args"] = dict(self.tool_args)
        return out

    @staticmethod
    def from_dict(raw: Mapping[str, Any]) -> "Message":
        return Message(
            role=raw["role"],
            content=raw.get("content", ""),
            tool_name=raw.get("tool_name"),
            tool_args=raw.get("tool_args"),
        )


@dataclass(frozen=True)
class ExpectCall:
    kind: Literal["call"] = "call"
    name: str = ""
    args: Mapping[str, Any] = field(default_factory=dict)


@dataclass(frozen=True)
class ExpectNoCall:
    kind: Literal["no_call"] = "no_call"
    answer_contains_any: Sequence[Sequence[str]] = ()
    answer_contains_all: Sequence[str] = ()


Expectation = ExpectCall | ExpectNoCall


@dataclass(frozen=True)
class Case:
    id: str
    lang: Lang
    category: str
    difficulty: str
    tools: tuple[str, ...]
    user: str
    expect: Expectation
    history: tuple[Message, ...] = ()
    notes: str = ""

    def messages(self) -> tuple[Message, ...]:
        return self.history + (Message(role="user", content=self.user),)

    def to_dict(self) -> dict[str, Any]:
        raw: dict[str, Any] = {
            "id": self.id,
            "lang": self.lang,
            "category": self.category,
            "difficulty": self.difficulty,
            "tools": list(self.tools),
            "user": self.user,
            "expect": _expect_to_dict(self.expect),
        }
        if self.history:
            raw["history"] = [m.to_dict() for m in self.history]
        if self.notes:
            raw["notes"] = self.notes
        return raw

    def to_json(self) -> str:
        return json.dumps(self.to_dict(), ensure_ascii=False, sort_keys=True)

    @staticmethod
    def from_dict(raw: Mapping[str, Any]) -> "Case":
        return Case(
            id=raw["id"],
            lang=raw["lang"],
            category=raw["category"],
            difficulty=raw["difficulty"],
            tools=tuple(raw["tools"]),
            user=raw["user"],
            expect=_expect_from_dict(raw["expect"]),
            history=tuple(Message.from_dict(m) for m in raw.get("history", ())),
            notes=raw.get("notes", ""),
        )


def _expect_to_dict(expect: Expectation) -> dict[str, Any]:
    if expect.kind == "call":
        return {"kind": "call", "name": expect.name, "args": dict(expect.args)}
    out: dict[str, Any] = {"kind": "no_call"}
    if expect.answer_contains_any:
        out["answer_contains_any"] = [list(group) for group in expect.answer_contains_any]
    if expect.answer_contains_all:
        out["answer_contains_all"] = list(expect.answer_contains_all)
    return out


def _expect_from_dict(raw: Mapping[str, Any]) -> Expectation:
    if raw["kind"] == "call":
        return ExpectCall(name=raw["name"], args=raw.get("args", {}))
    return ExpectNoCall(
        answer_contains_any=tuple(tuple(g) for g in raw.get("answer_contains_any", ())),
        answer_contains_all=tuple(raw.get("answer_contains_all", ())),
    )


@dataclass(frozen=True)
class ToolCall:
    name: str
    args: Mapping[str, Any]

    def canonical(self) -> str:
        return json.dumps({"name": self.name, "args": dict(self.args)}, ensure_ascii=False, sort_keys=True)


@dataclass(frozen=True)
class ParseResult:
    calls: tuple[ToolCall, ...]
    source: str
    malformed: bool = False
    detail: str = ""

    @property
    def call(self) -> ToolCall | None:
        return self.calls[0] if self.calls else None


@dataclass(frozen=True)
class CaseResult:
    case_id: str
    protocol: Protocol
    lang: Lang
    category: str
    difficulty: str
    passed: bool
    called: bool
    expected_call: bool
    name_correct: bool
    args_exact: bool
    answer_ok: bool | None
    malformed: bool
    output: str
    detail: str = ""

    def to_dict(self) -> dict[str, Any]:
        return {
            "case_id": self.case_id,
            "protocol": self.protocol,
            "lang": self.lang,
            "category": self.category,
            "difficulty": self.difficulty,
            "passed": self.passed,
            "called": self.called,
            "expected_call": self.expected_call,
            "name_correct": self.name_correct,
            "args_exact": self.args_exact,
            "answer_ok": self.answer_ok,
            "malformed": self.malformed,
            "output": self.output,
            "detail": self.detail,
        }