"""测试辅助工具"""

import json
import tempfile
import subprocess
from typing import Dict, Any, List, Optional
from pathlib import Path

from entity.render_task import RenderTask
from entity.effects.base import EffectProcessor
from config.settings import FFmpegConfig


class MockRenderTask:
    """模拟渲染任务，用于测试"""

    def __init__(
        self,
        input_files: Optional[List[str]] = None,
        output_file: str = "test_output.mp4",
        effects: Optional[List[str]] = None,
        ext_data: Optional[Dict[str, Any]] = None,
        frame_rate: int = 25,
    ):
        # RenderTask required fields
        self.input_files = input_files or []
        self.output_file = output_file
        self.task_type = "copy"  # TaskType.COPY equivalent

        # Optional fields that match RenderTask
        self.resolution = None
        self.frame_rate = frame_rate
        self.speed = 1.0
        self.mute = True
        self.annexb = False

        # Cut parameters
        self.zoom_cut = None
        self.center_cut = None

        # Resource lists
        self.subtitles: List[str] = []
        self.luts: List[str] = []
        self.audios: List[str] = []
        self.overlays: List[str] = []
        self.effects = effects or []

        # Extension data
        self.ext_data = ext_data or {}

        # Legacy compatibility
        self.task_id = "test_task"
        self.template_id = "test_template"
        self.use_center_cut = False
        self.use_zoom_cut = False
        self.audio_file = None


class FFmpegValidator:
    """FFmpeg命令验证器"""

    @staticmethod
    def validate_filter_syntax(filter_str: str) -> bool:
        """验证滤镜语法是否正确"""
        try:
            # 基本语法检查
            if not filter_str:
                return False

            # 检查是否包含基本的滤镜结构
            if "[" in filter_str and "]" in filter_str:
                return True

            # 检查常见的滤镜格式
            common_filters = ["zoompan", "setpts", "trim", "scale", "crop"]
            return any(f in filter_str for f in common_filters)

        except Exception:
            return False

    @staticmethod
    def validate_stream_identifier(stream_id: str) -> bool:
        """验证流标识符格式"""
        if not stream_id:
            return False
        return stream_id.startswith("[") and stream_id.endswith("]")

    @staticmethod
    def validate_ffmpeg_command(command: List[str]) -> Dict[str, Any]:
        """验证完整的FFmpeg命令"""
        result = {
            "valid": False,
            "has_input": False,
            "has_output": False,
            "has_filter": False,
            "errors": [],
        }

        if not command or command[0] != "ffmpeg":
            result["errors"].append("Command must start with 'ffmpeg'")
            return result

        # 检查输入文件
        if "-i" in command:
            result["has_input"] = True
        else:
            result["errors"].append("No input file specified")

        # 检查输出文件
        if len(command) > 1 and not command[-1].startswith("-"):
            result["has_output"] = True
        else:
            result["errors"].append("No output file specified")

        # 检查滤镜
        if "-filter_complex" in command or "-vf" in command:
            result["has_filter"] = True

        result["valid"] = (
            result["has_input"] and result["has_output"] and len(result["errors"]) == 0
        )

        return result


class EffectTestHelper:
    """特效测试辅助类"""

    @staticmethod
    def create_test_effect(
        effect_class, params: str = "", ext_data: Dict[str, Any] = None
    ):
        """创建测试用特效实例"""
        return effect_class(params, ext_data)

    @staticmethod
    def test_effect_params_validation(
        effect: EffectProcessor, test_cases: List[Dict[str, Any]]
    ):
        """批量测试特效参数验证"""
        results = []
        for case in test_cases:
            effect.params = case.get("params", "")
            effect.ext_data = case.get("ext_data", {})

            is_valid = effect.validate_params()
            expected = case.get("expected", True)

            results.append(
                {
                    "params": effect.params,
                    "expected": expected,
                    "actual": is_valid,
                    "passed": is_valid == expected,
                    "description": case.get("description", ""),
                }
            )

        return results

    @staticmethod
    def test_filter_generation(
        effect: EffectProcessor, video_input: str = "[0:v]", effect_index: int = 1
    ):
        """测试滤镜生成"""
        try:
            filters, output_stream = effect.generate_filter_args(
                video_input, effect_index
            )

            result = {
                "success": True,
                "filters": filters,
                "output_stream": output_stream,
                "filter_count": len(filters),
                "valid_syntax": all(
                    FFmpegValidator.validate_filter_syntax(f) for f in filters
                ),
                "valid_output": (
                    FFmpegValidator.validate_stream_identifier(output_stream)
                    if output_stream != video_input
                    else True
                ),
            }
        except Exception as e:
            result = {
                "success": False,
                "error": str(e),
                "filters": [],
                "output_stream": "",
                "filter_count": 0,
                "valid_syntax": False,
                "valid_output": False,
            }

        return result


def create_test_video_file(
    output_path: str, duration: int = 5, resolution: str = "640x480"
) -> bool:
    """创建测试用视频文件"""
    try:
        cmd = [
            "ffmpeg",
            "-y",  # 覆盖输出文件
            "-f",
            "lavfi",  # 使用libavfilter输入
            "-i",
            f"testsrc=duration={duration}:size={resolution}:rate=25",
            "-c:v",
            "libx264",
            "-preset",
            "ultrafast",
            "-crf",
            "23",
            output_path,
        ]

        result = subprocess.run(cmd, capture_output=True, text=True)
        return result.returncode == 0

    except Exception:
        return False


def create_sample_template_data() -> Dict[str, Any]:
    """创建示例模板数据"""
    return {
        "templateId": "test_template_001",
        "name": "测试模板",
        "parts": [
            {
                "id": "part1",
                "type": "video",
                "duration": 10.0,
                "effects": ["zoom:0,2.0,3.0", "ospeed:1.5"],
            }
        ],
        "settings": {"width": 1920, "height": 1080, "frameRate": 25},
    }