"""Level Builder CLI — 白模关卡自动生成工具。

用法:
  # Stage 1: 解析搭建指南 → JSON
  python main.py parse --input ../../docs/technical/关卡-v01-搭建指南.md --output output/level_v01.json

  # Stage 1.5: 验证
  python main.py validate --input output/level_v01.json [--project-root ../..]

  # Stage 2: UE5 编辑器内构建（需在编辑器 Python 环境中运行）
  #   方式 A: 在 Output Log Python 控制台:
  #     exec(open(r"tools/level-builder/main.py").read())
  #     main(["build", "--input", "output/level_v01.json"])
  #   方式 B: File > Execute Python Script

  # Stage 3: 生成报告
  python main.py report --input output/level_v01.json [--build-log output/build_log.json] --output report.md
"""

import argparse
import json
import logging
import sys
from pathlib import Path

# 将项目 tools 目录加入 sys.path
_TOOLS_DIR = Path(__file__).resolve().parent
_LEVEL_BUILDER_DIR = _TOOLS_DIR
_PROJECT_ROOT = _TOOLS_DIR.parent.parent

if str(_TOOLS_DIR) not in sys.path:
    sys.path.insert(0, str(_TOOLS_DIR))
if str(_PROJECT_ROOT) not in sys.path:
    sys.path.insert(0, str(_PROJECT_ROOT))

# 配置日志
logging.basicConfig(
    level=logging.INFO,
    format="[%(levelname)s] %(name)s: %(message)s",
)
logger = logging.getLogger("level_builder")


def cmd_parse(args):
    """解析搭建指南 Markdown → JSON。"""
    from parsers.build_guide_parser import BuildGuideParser

    input_path = args.input
    output_path = args.output or "output/level_data.json"

    logger.info(f"解析搭建指南: {input_path}")

    parser = BuildGuideParser()
    data = parser.parse_file(input_path)

    # 写入 JSON
    out_path = Path(output_path)
    out_path.parent.mkdir(parents=True, exist_ok=True)
    with open(out_path, "w", encoding="utf-8") as f:
        json.dump(data, f, ensure_ascii=False, indent=2)

    summary = data.get("summary", {})
    logger.info(f"解析完成: {summary.get('total_actors', 0)} 个 Actor")
    logger.info(f"  按类别: {summary.get('by_category', {})}")
    logger.info(f"  按区域: {summary.get('by_zone', {})}")
    logger.info(f"  唯一资产数: {summary.get('unique_assets', 0)}")
    logger.info(f"输出: {out_path.resolve()}")


def cmd_validate(args):
    """验证 JSON 数据中的资产引用。"""
    from validation.asset_validator import validate_actors

    input_path = args.input
    project_root = args.project_root or str(_PROJECT_ROOT)

    logger.info(f"验证: {input_path}")

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

    actors = data.get("actors", [])
    result = validate_actors(actors, project_root)

    if result.is_valid:
        logger.info("✅ 验证通过!")
    else:
        logger.error(f"❌ 验证失败: {len(result.errors)} 个错误")
        for err in result.errors:
            logger.error(f"  {err}")

    if result.warnings:
        for warn in result.warnings:
            logger.warning(f"  {warn}")

    logger.info(f"有效 Actor: {result.valid_actors}/{result.total_actors}")

    # 保存验证结果
    output_path = Path(input_path).parent / "validation_result.json"
    with open(output_path, "w", encoding="utf-8") as f:
        json.dump({
            "is_valid": result.is_valid,
            "total": result.total_actors,
            "valid": result.valid_actors,
            "errors": result.errors,
            "warnings": result.warnings,
            "missing_assets": sorted(result.missing_assets),
            "missing_materials": sorted(result.missing_materials),
        }, f, ensure_ascii=False, indent=2)
    logger.info(f"验证结果: {output_path}")


def cmd_build(args):
    """在 UE5 编辑器中构建关卡。"""
    try:
        from builder.scene_builder import build_level
    except ImportError:
        print("[错误] 无法导入 builder 模块。确保在 UE5 编辑器 Python 环境中运行。")
        print("  在 Output Log 中切换到 Python，然后执行:")
        print(f'  exec(open(r"{Path(__file__).resolve()}").read())')
        print(f'  build_level(r"{Path(args.input).resolve()}")')
        return

    zones = args.zones.split(",") if args.zones else None
    build_level(args.input, clear_existing=args.clear, zones=zones)


def cmd_report(args):
    """生成搭建报告。"""
    from report.report_generator import generate_report

    input_path = args.input
    output_path = args.output or "output/搭建报告.md"
    build_log_path = args.build_log

    logger.info(f"生成报告: {input_path}")

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

    build_log = None
    if build_log_path:
        try:
            with open(build_log_path, "r", encoding="utf-8") as f:
                build_log = json.load(f)
        except FileNotFoundError:
            logger.warning(f"构建日志不存在: {build_log_path}，生成无状态报告")

    report = generate_report(data, build_log, output_path)
    logger.info(f"报告已生成: {output_path}")


def main(argv=None):
    """CLI 入口。"""
    parser = argparse.ArgumentParser(
        description="ChildHood 白模关卡自动生成工具",
        prog="level-builder",
    )
    subparsers = parser.add_subparsers(dest="command", help="子命令")

    # parse
    p_parse = subparsers.add_parser("parse", help="解析搭建指南 Markdown → JSON")
    p_parse.add_argument("--input", "-i", required=True, help="搭建指南 Markdown 文件路径")
    p_parse.add_argument("--output", "-o", default="output/level_data.json", help="输出 JSON 路径")

    # validate
    p_validate = subparsers.add_parser("validate", help="验证 JSON 数据")
    p_validate.add_argument("--input", "-i", required=True, help="JSON 文件路径")
    p_validate.add_argument("--project-root", "-r", help="项目根目录（用于文件存在性检查）")

    # build
    p_build = subparsers.add_parser("build", help="在 UE5 中构建关卡")
    p_build.add_argument("--input", "-i", required=True, help="JSON 文件路径")
    p_build.add_argument("--clear", action="store_true", default=True, help="清除已有 LVL_* Actor")
    p_build.add_argument("--no-clear", dest="clear", action="store_false", help="不清除已有 Actor")
    p_build.add_argument("--zones", "-z", help="仅构建指定区域，逗号分隔（如 Z1,Z3）")

    # report
    p_report = subparsers.add_parser("report", help="生成搭建报告")
    p_report.add_argument("--input", "-i", required=True, help="JSON 文件路径")
    p_report.add_argument("--build-log", "-l", help="构建日志 JSON 路径")
    p_report.add_argument("--output", "-o", default="output/搭建报告.md", help="报告输出路径")

    args = parser.parse_args(argv)

    if args.command == "parse":
        cmd_parse(args)
    elif args.command == "validate":
        cmd_validate(args)
    elif args.command == "build":
        cmd_build(args)
    elif args.command == "report":
        cmd_report(args)
    else:
        parser.print_help()


if __name__ == "__main__":
    main()