"""验证 summary JSON 是否符合 SummarySchema 要求。

用法：python scripts/validate_summary.py <json_file>
返回：exit 0 = 通过，exit 1 = 失败（错误信息输出到 stdout）
"""

import json
import sys
from pathlib import Path


def validate(path: str) -> list[str]:
    errors: list[str] = []
    try:
        data = json.loads(Path(path).read_text(encoding="utf-8"))
    except json.JSONDecodeError as e:
        return [f"JSON 解析失败: {e}"]

    if not isinstance(data, dict):
        return ["顶层必须是 JSON 对象 (dict)"]

    # 必填字段
    required_top = ["arxiv_id", "title_zh", "one_line", "tags"]
    for f in required_top:
        if f not in data or not data[f]:
            errors.append(f"缺少必填字段: {f}")

    # tags 必须是非空数组
    tags = data.get("tags")
    if isinstance(tags, list) and len(tags) == 0:
        errors.append("tags 不能为空数组")
    if not isinstance(tags, list):
        errors.append("tags 必须是数组")

    # motivation 子字段
    motivation = data.get("motivation", {})
    if not isinstance(motivation, dict):
        errors.append("motivation 必须是对象")
    else:
        for f in ["problem", "goal", "gap"]:
            val = motivation.get(f, "")
            if not isinstance(val, str) or len(val.strip()) < 50:
                errors.append(f"motivation.{f} 必须是详细段落（≥50字），当前: {type(val).__name__} ({len(str(val))}字)")

    # method 子字段
    method = data.get("method", {})
    if not isinstance(method, dict):
        errors.append("method 必须是对象")
    else:
        for f in ["overview", "key_idea", "steps", "novelty"]:
            val = method.get(f, "")
            if not isinstance(val, str) or len(val.strip()) < 50:
                errors.append(f"method.{f} 必须是详细段落（≥50字），当前: {type(val).__name__} ({len(str(val))}字)")

    # results 子字段
    results = data.get("results", {})
    if not isinstance(results, dict):
        errors.append("results 必须是对象")
    else:
        for f in ["main_findings", "limitations"]:
            val = results.get(f, "")
            if not isinstance(val, str) or len(val.strip()) < 50:
                errors.append(f"results.{f} 必须是详细段落（≥50字），当前: {type(val).__name__} ({len(str(val))}字)")
        # benchmarks 可以是数组
        benchmarks = results.get("benchmarks")
        if benchmarks is not None and not isinstance(benchmarks, list):
            errors.append("results.benchmarks 必须是数组")

    # improvements 子字段
    improvements = data.get("improvements", {})
    if not isinstance(improvements, dict):
        errors.append("improvements 必须是对象")
    else:
        for f in ["weaknesses", "future_work", "reproducibility"]:
            val = improvements.get(f, "")
            if not isinstance(val, str) or len(val.strip()) < 50:
                errors.append(f"improvements.{f} 必须是详细段落（≥50字），当前: {type(val).__name__} ({len(str(val))}字)")

    # 检查是否有字段误用数组（应该用字符串的）
    string_fields = [
        ("motivation", "problem"), ("motivation", "goal"), ("motivation", "gap"),
        ("method", "overview"), ("method", "key_idea"), ("method", "steps"), ("method", "novelty"),
        ("results", "main_findings"), ("results", "limitations"),
        ("improvements", "weaknesses"), ("improvements", "future_work"), ("improvements", "reproducibility"),
    ]
    for section, field in string_fields:
        val = data.get(section, {}).get(field)
        if isinstance(val, list):
            errors.append(f"{section}.{field} 应该是字符串段落，不能是数组")

    # figures 验证
    figures = data.get("figures")
    if figures is not None:
        if not isinstance(figures, list):
            errors.append("figures 必须是数组")
        else:
            for i, fig in enumerate(figures):
                if isinstance(fig, dict) and not fig.get("id"):
                    errors.append(f"figures[{i}] 缺少 id 字段")

    return errors


if __name__ == "__main__":
    if len(sys.argv) != 2:
        print("用法: python scripts/validate_summary.py <json_file>")
        sys.exit(1)

    errs = validate(sys.argv[1])
    if errs:
        print("❌ 验证失败:")
        for e in errs:
            print(f"  - {e}")
        sys.exit(1)
    else:
        print("✅ 验证通过")
        sys.exit(0)