import json

def extract_last_three_with_fallback(data_list):
    # 定义年份范围（当前最新是 FY2025，所以前三年是 2025, 2024, 2023）
    years = [2025, 2024, 2023]
    
    # 构建 period 映射：按优先级
    priority_levels = [
        ("FY", [f"FY{y}" for y in years]),
        ("Q4", [f"{y}Q4" for y in years]),
        ("Q3", [f"{y}Q3" for y in years]),
        ("Q2", [f"{y}Q2" for y in years]),
        ("Q1", [f"{y}Q1" for y in years]),
    ]
    
    # 转为字典便于查找
    data_map = {item["period"]: item for item in data_list if "period" in item}
    
    # 按优先级尝试
    for level_name, periods in priority_levels:
        records = []
        valid = True
        
        for period in periods:
            item = data_map.get(period)
            if item is None or item.get("total_revenue") is None:
                valid = False
                break
            # 提取关键字段
            clean_item = {
                "period": period,
                "fiscal_year": int(period[:4]) if level_name != "FY" else int(period[2:]),
                "level": level_name,
                "total_revenue": item["total_revenue"],
                "net_income": item.get("net_income"),
                "earnings_per_share": item.get("earnings_per_share"),
                "operating_expenses": item.get("operating_expenses"),
                "operating_cash_flow": item.get("operating_cash_flow"),
                "source_url": item.get("source_url")
            }
            records.append(clean_item)
        
        if valid:
            # 找到完整三年数据，返回
            return records
    
    # 如果所有层级都不完整，可选择返回最高优先级中有效的部分（或抛异常）
    # 这里我们返回最高优先级中非空的记录（保守策略）
    for level_name, periods in priority_levels:
        records = []
        for period in periods:
            item = data_map.get(period)
            if item and item.get("total_revenue") is not None:
                clean_item = {
                    "period": period,
                    "fiscal_year": int(period[:4]) if level_name != "FY" else int(period[2:]),
                    "level": level_name,
                    "total_revenue": item["total_revenue"],
                    "net_income": item.get("net_income"),
                    "earnings_per_share": item.get("earnings_per_share"),
                    "operating_expenses": item.get("operating_expenses"),
                    "operating_cash_flow": item.get("operating_cash_flow"),
                    "source_url": item.get("source_url")
                }
                records.append(clean_item)
        if records:
            return records  # 返回第一个有数据的层级（即使不全）
    
    return []  # 完全无数据


def format_number(value):
    """将大数字格式化为 $XM 或 $XB"""
    if value >= 1_000_000_000:
        return f"${value / 1_000_000_000:.2f}B".replace(".00B", "B").replace(".0B", "B")
    elif value >= 1_000_000:
        return f"${value / 1_000_000:.1f}M".replace(".0M", "M")
    else:
        return f"${value:,.0f}"

def format_eps(value):
    """EPS 保留两位小数"""
    return f"${value:.2f}"

def safe_int(val):
    """安全转换为 int，支持字符串或 None"""
    if val is None:
        return 0
    try:
        return int(float(val))  # 兼容字符串或 float
    except (ValueError, TypeError):
        return 0

def calculate_change(current, previous):
    """计算同比变化百分比，返回如 '+12.4%' 或 '-3.2%'"""
    if previous == 0:
        return "+0.0%" if current >= 0 else "-0.0%"
    change = (current - previous) / abs(previous) * 100
    sign = "+" if change >= 0 else "-"
    return f"{sign}{abs(change):.1f}%"

def build_financial_metrics_three_year_data(three_year_data):
    # 确保按 fiscal_year 降序排列（最新在前）
    sorted_data = sorted(three_year_data, key=lambda x: x["fiscal_year"], reverse=True)
    if len(sorted_data) < 2:
        raise ValueError("至少需要两年数据来计算同比变化")

    latest = sorted_data[0]
    previous = sorted_data[1]

    # 提取并转为 int
    rev_curr = safe_int(latest.get("total_revenue"))
    rev_prev = safe_int(previous.get("total_revenue"))

    net_curr = safe_int(latest.get("net_income"))
    net_prev = safe_int(previous.get("net_income"))

    eps_curr = float(latest.get("earnings_per_share", 0) or 0)
    eps_prev = float(previous.get("earnings_per_share", 0) or 0)

    opex_curr = safe_int(latest.get("operating_expenses"))
    opex_prev = safe_int(previous.get("operating_expenses"))

    cash_curr = safe_int(latest.get("operating_cash_flow"))
    cash_prev = safe_int(previous.get("operating_cash_flow"))

    metrics = [
        {
            "label": "Total Revenue",
            "value": format_number(rev_curr),
            "change": calculate_change(rev_curr, rev_prev),
            "color": "green" if rev_curr >= rev_prev else "red"
        },
        {
            "label": "Net Income",
            "value": format_number(net_curr),
            "change": calculate_change(net_curr, net_prev),
            "color": "green" if net_curr >= net_prev else "red"
        },
        {
            "label": "Earnings Per Share",
            "value": format_eps(eps_curr),
            "change": calculate_change(eps_curr, eps_prev),
            "color": "green" if eps_curr >= eps_prev else "red"
        },
        {
            "label": "Operating Expenses",
            "value": format_number(opex_curr),
            "change": calculate_change(opex_curr, opex_prev),
            "color": "green" if opex_curr >= opex_prev else "red"
        },
        {
            "label": "Cash Flow",
            "value": format_number(cash_curr),
            "change": calculate_change(cash_curr, cash_prev),
            "color": "green" if cash_curr >= cash_prev else "red"
        }
    ]

    return metrics
# 假设你的原始数据变量名为 raw_data（即你提供的大列表）
# raw_data = [ {...}, ... ]

# 执行
# result = extract_last_three_with_fallback(raw_data)

# # 输出 JSON
# json_output = json.dumps(result, indent=2)
# print(json_output)

# ==========

from collections import defaultdict
import re

def parse_period(period):
    """解析 period 字符串，返回 (year, type, quarter)"""
    if period.startswith('FY'):
        year = int(period[2:])
        return year, 'FY', None
    elif re.match(r'Q[1-4]-\d{4}', period):
        q, year = period.split('-')
        return int(year), 'Q', int(q[1])
    else:
        raise ValueError(f"Unknown period format: {period}")

def get_best_value_for_year(year_data, key):
    """
    year_data: dict like {'FY': value, 'Q1': val, 'Q2': val, ...}
    返回该财年该指标的最佳可用值（优先 FY，其次 Q4->Q3->Q2->Q1）
    """
    if year_data.get('FY') is not None:
        return year_data['FY']
    # 否则从 Q4 到 Q1 找第一个非 None
    for q in ['Q4', 'Q3', 'Q2', 'Q1']:
        if year_data.get(q) is not None:
            return year_data[q]
    return None
# def get_yearly_data(data_json):
#     metrics_list = data_json['metrics']
    
#     # 按年份组织数据：year -> { 'FY': {...}, 'Q1': {...}, ... }
#     yearly_data = "N/A"
    
#     for metric in metrics_list:
#         period = metric['period']
#         year, ptype, quarter = parse_period(period)
#         if ptype == 'FY':
#             yearly_data = f"{year} {ptype}"
#         else:
#             yearly_data = f"{year} {ptype} Q{quarter}"
#     return yearly_data
import re

def parse_period_year_data(period):
    """
    支持以下格式：
    - FY2025
    - Q1-2025
    - 2025Q1  （新增支持）
    """
    if not isinstance(period, str):
        return None, None, None

    # 格式 1: FY2025
    if period.startswith('FY'):
        try:
            year = int(period[2:])
            return year, 'FY', None
        except ValueError:
            pass

    # 格式 2: Q1-2025
    match = re.match(r'Q([1-4])-(\d{4})', period)
    if match:
        quarter = int(match.group(1))
        year = int(match.group(2))
        return year, 'Q', quarter

    # 格式 3: 2025Q1 （新增）
    match = re.match(r'(\d{4})Q([1-4])', period)
    if match:
        year = int(match.group(1))
        quarter = int(match.group(2))
        return year, 'Q', quarter

    # 无法解析
    return None, None, None
def get_yearly_data(data_json):
    metrics_list = data_json.get('metrics', [])
    latest_desc = "N/A"
    
    for metric in metrics_list:
        period = metric.get('period')
        if not period:
            continue
        year, ptype, quarter = parse_period_year_data(period)
        if year is None:
            continue  # 跳过无法解析的
        
        if ptype == 'FY':
            desc = f"{year} FY"
        else:
            desc = f"{year} Q{quarter}"
        
        # 简单认为列表顺序是时间顺序，最后一条最新
        latest_desc = desc
    
    return latest_desc
def parse_period_yoy(period):
    """解析 period 为 (year, type, quarter)"""
    if period.startswith('FY'):
        year = int(period[2:])
        return year, 'FY', None
    elif re.match(r'Q[1-4]-\d{4}', period):
        q_part, year_str = period.split('-')
        return int(year_str), 'Q', int(q_part[1])
    else:
        # 忽略无法解析的 period
        return None, None, None

def get_best_value_for_year_yoy(values_dict, key):
    """
    从年度数据中获取指定指标的最佳值（优先 FY，其次 Q4 → Q1）
    values_dict: {'FY': {...}, 'Q1': {...}, ...}
    """
    order = ['FY', 'Q4', 'Q3', 'Q2', 'Q1']
    for q in order:
        metric = values_dict.get(q)
        if metric is not None and isinstance(metric, dict):
            val = metric.get(key)
            if val is not None:
                return val
    return None
import json
def calculate_yoy_comparison(data_json):
    metrics_list = data_json.get('metrics', [])
    if not metrics_list:
        return []
    if not isinstance(metrics_list, list):
        return []
    if not isinstance(metrics_list[0], dict):
        return []
    # 安全处理：确保每个 metric 是字典（防止双重 JSON 编码）
    cleaned_metrics = []
    for i, metric in enumerate(metrics_list):
        if isinstance(metric, str):
            try:
                metric = json.loads(metric)
                # metric = metric
            except Exception as e:
                raise ValueError(f"Failed to parse metrics[{i}] as JSON string: {metric}") from e
        if not isinstance(metric, dict):
            raise TypeError(f"metrics[{i}] is not a dictionary or valid JSON string. Type: {type(metric)}")
        cleaned_metrics.append(metric)

    # 按年份组织数据：year -> { 'FY': {...}, 'Q1': {...}, ... }
    yearly_data = defaultdict(lambda: defaultdict(dict))
    
    for metric in cleaned_metrics:
        period = metric.get('period')
        if not period:
            continue  # 跳过没有 period 的条目
        
        year, ptype, quarter = parse_period_yoy(period)
        if year is None:
            continue  # 跳过无法解析的 period
        
        if ptype == 'FY':
            yearly_data[year]['FY'] = metric
        elif ptype == 'Q':
            yearly_data[year][f'Q{quarter}'] = metric
        # 否则忽略

    # 获取所有年份并排序（最新在前）
    years = sorted(yearly_data.keys(), reverse=True)
    if len(years) < 2:
        raise ValueError("至少需要两个财年的数据")

    latest_year = years[0]
    prev_year = years[1]

    result = []
    indicators = [
        ("Total Revenue", "total_revenue"),
        ("Net Income", "net_income"),
        ("Earnings Per Share", "earnings_per_share"),
        ("Operating Expenses", "operating_expenses"),
        ("Cash Flow", "operating_cash_flow")
    ]

    def format_value(val):
        if val is None:
            return "N/A"
        try:
            val = float(val)
        except (TypeError, ValueError):
            return "N/A"
        abs_val = abs(val)
        if abs_val >= 1e9:
            return f"${val / 1e9:.2f}B"
        elif abs_val >= 1e6:
            return f"${val / 1e6:.1f}M"
        elif abs_val >= 1e3:
            return f"${val / 1e3:.1f}K"
        else:
            return f"${val:.2f}"

    for label, key in indicators:
        # 获取本财年最佳值
        current_val = get_best_value_for_year_yoy(yearly_data[latest_year], key)
        # 获取去年财年最佳值
        prev_val = get_best_value_for_year_yoy(yearly_data[prev_year], key)

        if current_val is None or prev_val is None or prev_val == 0:
            change_str = "N/A"
            color = "N/A"
        else:
            try:
                current_val = float(current_val)
                prev_val = float(prev_val)
            except (TypeError, ValueError):
                change_str = "N/A"
                color = "N/A"
            else:
                change_pct = (current_val - prev_val) / abs(prev_val) * 100
                if change_pct > 0:
                    change_str = f"+{change_pct:.1f}%"
                    color = "green"
                elif change_pct < 0:
                    change_str = f"{change_pct:.1f}%"
                    color = "red"
                else:
                    change_str = "0.0%"
                    color = "N/A"

        formatted_value = format_value(current_val)

        result.append({
            "label": label,
            "value": formatted_value,
            "change": change_str,
            "color": color
        })

    return result
# def parse_period_yoy(period):
#     """解析 period 为 (year, type, quarter)"""
#     if period.startswith('FY'):
#         year = int(period[2:])
#         return year, 'FY', None
#     elif re.match(r'Q[1-4]-\d{4}', period):
#         q_part, year_str = period.split('-')
#         return int(year_str), 'Q', int(q_part[1])
#     else:
#         # 忽略无法解析的 period
#         return None, None, None
# def calculate_yoy_comparison(data_json):
#     metrics_list = data_json['metrics']
    
#     # 按年份组织数据：year -> { 'FY': {...}, 'Q1': {...}, ... }
#     yearly_data = defaultdict(lambda: defaultdict(dict))
    
#     for metric in metrics_list:
#         period = metric['period']
#         year, ptype, quarter = parse_period_yoy(period)
#         if ptype == 'FY':
#             yearly_data[year]['FY'] = metric
#         else:
#             yearly_data[year][f'Q{quarter}'] = metric

#     # 获取所有年份并排序（最新在前）
#     years = sorted(yearly_data.keys(), reverse=True)
#     if len(years) < 2:
#         raise ValueError("至少需要两个财年的数据")

#     latest_year = years[0]
#     prev_year = years[1]

#     result = []
#     indicators = [
#         ("Total Revenue", "total_revenue"),
#         ("Net Income", "net_income"),
#         ("Earnings Per Share", "earnings_per_share"),
#         ("Operating Expenses", "operating_expenses"),
#         ("Cash Flow", "operating_cash_flow")
#     ]

#     def format_value(val):
#         if val is None:
#             return "N/A"
#         abs_val = abs(val)
#         if abs_val >= 1e9:
#             return f"${val / 1e9:.2f}B"
#         elif abs_val >= 1e6:
#             return f"${val / 1e6:.1f}M"
#         elif abs_val >= 1e3:
#             return f"${val / 1e3:.1f}K"
#         else:
#             return f"${val:.2f}"

#     for label, key in indicators:
#         # 获取本财年最佳值
#         current_val = get_best_value_for_year(
#             {k: v.get(key) for k, v in yearly_data[latest_year].items()},
#             key
#         )
#         # 获取去年财年最佳值
#         prev_val = get_best_value_for_year(
#             {k: v.get(key) for k, v in yearly_data[prev_year].items()},
#             key
#         )

#         if current_val is None or prev_val is None or prev_val == 0:
#             change_str = "N/A"
#             color = "N/A"
#         else:
#             change_pct = (current_val - prev_val) / abs(prev_val) * 100
#             if change_pct > 0:
#                 change_str = f"+{change_pct:.1f}%"
#                 color = "green"
#             elif change_pct < 0:
#                 change_str = f"{change_pct:.1f}%"
#                 color = "red"
#             else:
#                 change_str = "0.0%"
#                 color = "N/A"

#         formatted_value = format_value(current_val)

#         result.append({
#             "label": label,
#             "value": formatted_value,
#             "change": change_str,
#             "color": color
#         })

#     return result




import re
import json
from collections import defaultdict

def parse_period_three_year(period):
    """解析 period 为 (year, type, quarter)"""
    if period.startswith('FY'):
        year = int(period[2:])
        return year, 'FY', None
    elif re.match(r'Q[1-4]-\d{4}', period):
        q_part, year_str = period.split('-')
        return int(year_str), 'Q', int(q_part[1])
    else:
        # 忽略无法解析的 period
        return None, None, None

def extract_financial_table(data_json):
    metrics_list = data_json.get('metrics', [])
    if not metrics_list:
        return []
    if not isinstance(metrics_list, list):
        return []
    if not isinstance(metrics_list[0], dict):
        return []
    # === 安全清洗：确保每个 metric 是字典 ===
    cleaned_metrics = []
    for i, metric in enumerate(metrics_list):
        if isinstance(metric, str):
            try:
                metric = json.loads(metric)
            except Exception as e:
                raise ValueError(f"Failed to parse metrics[{i}] as JSON string: {metric}") from e
        if not isinstance(metric, dict):
            raise TypeError(f"metrics[{i}] is not a dictionary or valid JSON string. Type: {type(metric)}")
        cleaned_metrics.append(metric)

    # 按年份组织所有报告：year -> { 'FY': metric_dict, 'Q1': ..., 'Q2': ... }
    yearly_reports = defaultdict(dict)
    all_years = set()

    for metric in cleaned_metrics:
        period = metric.get('period')
        if not period:
            continue  # 跳过无 period 的条目
        
        year, ptype, quarter = parse_period_three_year(period)
        if year is None:
            continue
        all_years.add(year)
        if ptype == 'FY':
            yearly_reports[year]['FY'] = metric
        elif ptype == 'Q':
            yearly_reports[year][f'Q{quarter}'] = metric

    if not all_years:
        raise ValueError("未找到任何有效报告期")

    # 取最近三个财年（倒序）
    sorted_years = sorted(all_years, reverse=True)[:3]
    # 补齐到3年（如果不足）
    while len(sorted_years) < 3:
        sorted_years.append(None)

    # 为每个年份获取最佳值（优先 FY，其次 Q4→Q1）
    def get_best_value(year, key):
        if year is None:
            return None
        reports = yearly_reports.get(year, {})
        # 确保 reports[q] 是 dict
        fy_report = reports.get('FY')
        if fy_report and isinstance(fy_report, dict):
            fy_val = fy_report.get(key)
            if fy_val is not None:
                return fy_val
        # 否则 Q4 → Q1
        for q in ['Q4', 'Q3', 'Q2', 'Q1']:
            q_report = reports.get(q)
            if q_report and isinstance(q_report, dict):
                q_val = q_report.get(key)
                if q_val is not None:
                    return q_val
        return None

    # 指标定义
    indicators = [
        ("Total", "total_revenue"),
        ("Net Income", "net_income"),
        ("Earnings Per Share", "earnings_per_share"),
        ("Operating Expenses", "operating_expenses"),
        ("Cash Flow", "operating_cash_flow")
    ]

    # 格式化函数
    def format_to_m(value):
        if value is None:
            return "N/A"
        try:
            val = float(value)
        except (TypeError, ValueError):
            return "N/A"
        val_in_m = val / 1e6
        if abs(val_in_m - round(val_in_m)) < 1e-6:
            return f"{int(round(val_in_m))}M"
        else:
            return f"{val_in_m:.1f}M"

    def format_eps(value):
        if value is None:
            return "N/A"
        try:
            val = float(value)
        except (TypeError, ValueError):
            return "N/A"
        return f"{val:.2f}"

    # 构建 list_data
    header = ["Category"] + [f"{year}/FY" for year in sorted_years if year is not None]
    list_data = [header]

    for label, key in indicators:
        row = [label]
        for year in sorted_years:
            if year is None:
                row.append("N/A")
            else:
                val = get_best_value(year, key)
                if label == "Earnings Per Share":
                    row.append(format_eps(val))
                else:
                    row.append(format_to_m(val))
        list_data.append(row)

    # 构建 yoy_rates
    valid_years = [y for y in sorted_years if y is not None]
    yoy_header = ["Category"]
    yoy_pairs = []

    if len(valid_years) >= 2:
        yoy_header.append(f"{valid_years[0]}/FY")
        yoy_pairs.append((valid_years[0], valid_years[1]))
    if len(valid_years) >= 3:
        yoy_header.append(f"{valid_years[1]}/FY")
        yoy_pairs.append((valid_years[1], valid_years[2]))

    yoy_rates = [yoy_header]

    for label, key in indicators:
        row = [label]
        for curr_y, prev_y in yoy_pairs:
            curr_val = get_best_value(curr_y, key)
            prev_val = get_best_value(prev_y, key)

            if curr_val is None or prev_val is None or prev_val == 0:
                row.append("N/A")
            else:
                try:
                    curr_val = float(curr_val)
                    prev_val = float(prev_val)
                except (TypeError, ValueError):
                    row.append("N/A")
                else:
                    pct = (curr_val - prev_val) / abs(prev_val) * 100
                    if pct >= 0:
                        row.append(f"+{pct:.2f}%")
                    else:
                        row.append(f"{pct:.2f}%")
        yoy_rates.append(row)

    return {
        "list_data": list_data,
        "yoy_rates": yoy_rates
    }