"""ComputerUseRecorder - Computer Use 操作录制与回放

记录每次截屏和操作，支持回放和审核。
支持将录制结果持久化到文件，以及从文件加载回放。
"""

from __future__ import annotations

import json
import logging
import time
from dataclasses import asdict, dataclass, field
from pathlib import Path

from agentkit.tools.computer_use_session import ComputerUseSession, ActionResult

logger = logging.getLogger(__name__)


@dataclass
class ActionRecord:
    """操作记录

    记录一次 Computer Use 操作的完整信息。
    """

    timestamp: float
    action: str
    params: dict[str, object] = field(default_factory=dict)
    success: bool = False
    output: str = ""
    error: str = ""
    screenshot_path: str = ""

    def to_dict(self) -> dict[str, object]:
        return asdict(self)

    @classmethod
    def from_dict(cls, data: dict[str, object]) -> ActionRecord:
        return cls(**data)


class ComputerUseRecorder:
    """Computer Use 操作录制器

    记录每次截屏和操作，支持回放和审核。

    Usage:
        recorder = ComputerUseRecorder()

        # 录制
        recorder.record("click", {"x": 100, "y": 200}, result)

        # 获取记录
        records = recorder.get_records()

        # 回放
        await recorder.replay(session)

        # 持久化
        recorder.save_recording("recording.json")
    """

    def __init__(self, screenshot_dir: str | Path | None = None):
        self._records: list[ActionRecord] = []
        self._screenshot_dir = Path(screenshot_dir) if screenshot_dir else None

    def record(
        self,
        action: str,
        params: dict[str, object],
        result: ActionResult,
        screenshot_path: str = "",
    ) -> ActionRecord:
        """记录一次操作

        Args:
            action: 操作类型
            params: 操作参数
            result: 操作结果
            screenshot_path: 截图文件路径

        Returns:
            ActionRecord 记录实例
        """
        record = ActionRecord(
            timestamp=time.time(),
            action=action,
            params=dict(params),
            success=result.success,
            output=result.output[:500] if result.output else "",
            error=result.error[:500] if result.error else "",
            screenshot_path=screenshot_path,
        )
        self._records.append(record)
        logger.debug(
            "Recorded action: %s success=%s",
            action,
            result.success,
        )
        return record

    def get_records(self) -> list[ActionRecord]:
        """获取所有操作记录（副本）"""
        return list(self._records)

    def get_records_by_action(self, action: str) -> list[ActionRecord]:
        """按操作类型筛选记录"""
        return [r for r in self._records if r.action == action]

    def get_failed_records(self) -> list[ActionRecord]:
        """获取所有失败的操作记录"""
        return [r for r in self._records if not r.success]

    async def replay(self, session: ComputerUseSession) -> list[ActionResult]:
        """回放操作序列

        按时间顺序重新执行所有录制的操作。

        Args:
            session: 目标会话

        Returns:
            每步操作的 ActionResult 列表
        """
        results: list[ActionResult] = []

        if not session.is_started:
            await session.start()

        for record in self._records:
            try:
                if record.action == "screenshot":
                    result = await session.screenshot()
                else:
                    result = await session.execute_action(
                        record.action, **record.params
                    )
                results.append(result)
                logger.info(
                    "Replayed action: %s success=%s",
                    record.action,
                    result.success,
                )
            except Exception as e:
                results.append(ActionResult(
                    success=False,
                    action=record.action,
                    error=f"Replay failed: {e}",
                ))
                logger.error(
                    "Replay failed for action %s: %s",
                    record.action,
                    e,
                )

        return results

    def save_recording(self, path: str | Path) -> None:
        """保存录制到文件

        Args:
            path: 文件路径（JSON 格式）
        """
        path = Path(path)
        path.parent.mkdir(parents=True, exist_ok=True)

        data = {
            "version": "1.0",
            "recorded_at": time.time(),
            "total_actions": len(self._records),
            "records": [r.to_dict() for r in self._records],
        }

        with open(path, "w", encoding="utf-8") as f:
            json.dump(data, f, indent=2, ensure_ascii=False)

        logger.info("Recording saved to %s (%d actions)", path, len(self._records))

    def load_recording(self, path: str | Path) -> None:
        """从文件加载录制

        Args:
            path: 文件路径（JSON 格式）

        Raises:
            FileNotFoundError: 文件不存在
            ValueError: 文件格式无效
        """
        path = Path(path)
        if not path.exists():
            raise FileNotFoundError(f"Recording file not found: {path}")

        with open(path, "r", encoding="utf-8") as f:
            data = json.load(f)

        if "records" not in data or not isinstance(data["records"], list):
            raise ValueError(f"Invalid recording format: {path}")

        self._records = [ActionRecord.from_dict(r) for r in data["records"]]
        logger.info("Recording loaded from %s (%d actions)", path, len(self._records))

    def clear(self) -> None:
        """清空录制记录"""
        self._records.clear()

    @property
    def total_actions(self) -> int:
        """总操作数"""
        return len(self._records)

    @property
    def success_count(self) -> int:
        """成功操作数"""
        return sum(1 for r in self._records if r.success)

    @property
    def failure_count(self) -> int:
        """失败操作数"""
        return sum(1 for r in self._records if not r.success)

    def summary(self) -> dict[str, object]:
        """生成录制摘要"""
        return {
            "total_actions": self.total_actions,
            "success_count": self.success_count,
            "failure_count": self.failure_count,
            "action_types": list({r.action for r in self._records}),
            "duration": (
                self._records[-1].timestamp - self._records[0].timestamp
                if len(self._records) >= 2
                else 0.0
            ),
        }