# -*- coding: utf-8 -*-
"""
ECharts 图表构建器：生成内联 ECharts JS 代码和静态库嵌入。
"""
from __future__ import annotations

import json
import logging
from pathlib import Path
from typing import Any, Dict, List, Optional

logger = logging.getLogger("voc.echarts")

# ECharts CDN（用于下载内联）
ECHARTS_CDN = "https://cdn.jsdelivr.net/npm/echarts@5.5.0/dist/echarts.min.js"
CACHE_FILE = Path(__file__).resolve().parent / ".echarts_cache.js"


def get_echarts_script(inline: bool = True) -> str:
    """返回 ECharts 库的 <script> 标签。inline=True 则内联，否则用 CDN。"""
    if not inline:
        return f'<script src="{ECHARTS_CDN}"></script>'

    # 内联模式：从缓存或下载
    if CACHE_FILE.is_file():
        js = CACHE_FILE.read_text(encoding="utf-8")
        logger.info("使用缓存的 ECharts (%s KB)", len(js) // 1024)
        return f"<script>\n{js}\n</script>"

    # 下载
    logger.info("下载 ECharts 库...")
    import urllib.request
    try:
        with urllib.request.urlopen(ECHARTS_CDN, timeout=30) as resp:
            js = resp.read().decode("utf-8")
        CACHE_FILE.write_text(js, encoding="utf-8")
        logger.info("ECharts 已缓存 (%s KB)", len(js) // 1024)
        return f"<script>\n{js}\n</script>"
    except Exception as e:
        logger.warning("下载 ECharts 失败: %s，降级到 CDN", e)
        return f'<script src="{ECHARTS_CDN}"></script>'


# ── 图表 JS 生成 ──

ASIN_COLORS_BAR = ["#ef4444", "#f97316", "#eab308", "#8b5cf6", "#3b82f6"]
ASIN_COLORS_POS = ["#22c55e", "#86efac", "#4ade80", "#2dd4bf", "#60a5fa"]


def build_star_dist_chart(asins: List[str], star_data: Dict[str, Dict[int, int]]) -> str:
    """评分分布堆叠柱状图。"""
    datasets = []
    colors = ["#22c55e", "#86efac", "#d1d5db", "#fbbf24", "#ef4444"]
    for star in [5, 4, 3, 2, 1]:
        datasets.append({
            "name": f"{star}★",
            "type": "bar",
            "stack": "total",
            "data": [star_data.get(a, {}).get(star, 0) for a in asins],
            "itemStyle": {"color": colors[5 - star]},
        })

    option = {
        "tooltip": {"trigger": "axis", "axisPointer": {"type": "shadow"}},
        "legend": {"bottom": 0, "textStyle": {"fontSize": 11}},
        "grid": {"left": 50, "right": 20, "top": 20, "bottom": 40},
        "xAxis": {"type": "category", "data": asins, "axisLabel": {"fontSize": 10}},
        "yAxis": {"type": "value"},
        "series": datasets,
    }
    return f"""new Chart(echarts.init(document.getElementById('starDistChart')), {{
  type: 'bar',
  data: {json.dumps(asins)},
  datasets: {json.dumps(datasets, ensure_ascii=False)},
  options: {{
    responsive: true, maintainAspectRatio: false,
    plugins: {{ legend: {{ position: 'bottom', labels: {{ font: {{ size: 11 }} }} }} }},
    scales: {{ x: {{ stacked: true }}, y: {{ stacked: true, beginAtZero: true }} }}
  }}
}});
// ECharts 版本:
(function() {{
  var dom = document.getElementById('starDistChart');
  var chart = echarts.init(dom);
  chart.setOption({json.dumps(option, ensure_ascii=False)});
  window.addEventListener('resize', function() {{ chart.resize(); }});
}})();"""


def build_horizontal_bar_chart(
    element_id: str,
    labels: List[str],
    data: List[int],
    colors: List[str] | None = None,
    height: int = 360,
    *,
    asin_category_axis: Optional[str] = None,
) -> str:
    """水平柱状图。asin_category_axis='y' 时 Y 轴短码 tooltip 显示 ASIN 链接。"""
    if colors is None:
        colors = ["#ef4444"] * len(labels)
    option = {
        "tooltip": {"trigger": "axis", "axisPointer": {"type": "shadow"}},
        "grid": {"left": 150, "right": 40, "top": 10, "bottom": 20},
        "xAxis": {"type": "value"},
        "yAxis": {"type": "category", "data": labels, "inverse": True,
                  "axisLabel": {"fontSize": 11}},
        "series": [{
            "type": "bar",
            "data": [{"value": v, "itemStyle": {"color": c}} for v, c in zip(data, colors)],
            "label": {"show": True, "position": "right", "fontSize": 10},
        }],
    }
    return _echarts_init(element_id, option, height=height, asin_category_axis=asin_category_axis)


def build_asin_mini_chart(
    element_id: str,
    labels: List[str],
    data: List[int],
    color: str = "#ef4444",
) -> str:
    """单个 ASIN 的迷你柱状图。"""
    option = {
        "tooltip": {"trigger": "axis", "axisPointer": {"type": "shadow"}},
        "grid": {"left": 100, "right": 30, "top": 5, "bottom": 15},
        "xAxis": {"type": "value", "axisLabel": {"fontSize": 9}},
        "yAxis": {"type": "category", "data": labels, "inverse": True,
                  "axisLabel": {"fontSize": 9}},
        "series": [{
            "type": "bar",
            "data": [{"value": v, "itemStyle": {"color": color}} for v in data],
        }],
    }
    return f"""(function() {{
  var dom = document.getElementById('{element_id}');
  var chart = echarts.init(dom);
  chart.setOption({json.dumps(option, ensure_ascii=False)});
  window.addEventListener('resize', function() {{ chart.resize(); }});
}})();"""


def build_grouped_bar_chart(
    element_id: str,
    labels: List[str],
    datasets: List[Dict[str, Any]],
) -> str:
    """分组柱状图（多 ASIN 对比）。"""
    series = [
        {
            "name": ds["label"],
            "type": "bar",
            "data": ds["data"],
            "itemStyle": {"color": ds.get("color", "#3b82f6")},
        }
        for ds in datasets
    ]
    option = {
        "tooltip": {"trigger": "axis", "axisPointer": {"type": "shadow"}},
        "legend": {"bottom": 0, "textStyle": {"fontSize": 10}},
        "grid": {"left": 50, "right": 20, "top": 20, "bottom": 40},
        "xAxis": {"type": "category", "data": labels, "axisLabel": {"fontSize": 10, "rotate": 20}},
        "yAxis": {"type": "value"},
        "series": series,
    }
    return f"""(function() {{
  var dom = document.getElementById('{element_id}');
  var chart = echarts.init(dom);
  chart.setOption({json.dumps(option, ensure_ascii=False)});
  window.addEventListener('resize', function() {{ chart.resize(); }});
}})();"""


# ── 布局与图表类型阈值 ──

THEME_COLORS_NEG = ["#ef4444", "#f97316", "#eab308", "#dc2626", "#b91c1c", "#fb923c"]
THEME_COLORS_POS = ["#22c55e", "#86efac", "#4ade80", "#2dd4bf", "#60a5fa", "#16a34a"]


def get_chart_layout(stats: Any, cfg: Optional[dict] = None) -> Dict[str, Any]:
    """根据 ASIN 数量计算图表布局参数。"""
    cfg = cfg or {}
    n = len(getattr(stats, "asins", []) or [])
    large_th = int(cfg.get("large_asin_threshold", 12))
    heatmap_th = int(cfg.get("heatmap_asin_threshold", 30))
    large = n > large_th
    heatmap = n > heatmap_th
    return {
        "asin_count": n,
        "large_market": large,
        "use_heatmap": heatmap,
        "star_chart_height": max(320, n * 22) if large else 300,
        "star_summary_height": 280,
        "show_star_summary": large and n > 15,
        "neg_theme_height": 480 if heatmap else (420 if large else 360),
        "pos_theme_height": 480 if heatmap else (420 if large else 360),
    }


# ── ASIN 短码 tooltip（悬浮显示代称 + 可点击 ASIN）──

def build_asin_tooltip_map(asin_short_codes: Dict[str, str]) -> Dict[str, Dict[str, str]]:
    """ASIN 短码 A → {asin, url}。"""
    from data_loader import build_amazon_url
    return {
        short: {"asin": asin, "url": build_amazon_url(asin)}
        for asin, short in asin_short_codes.items()
    }


def build_asin_tooltip_bootstrap(asin_short_codes: Dict[str, str]) -> str:
    """注入全局 VOC_ASIN_MAP 与 axis tooltip formatter。"""
    map_json = json.dumps(build_asin_tooltip_map(asin_short_codes), ensure_ascii=False)
    return f"""// ASIN 短码 tooltip（悬浮：A · B0XXX 可点击跳转亚马逊）
window.VOC_ASIN_MAP = {map_json};
window.vocAsinTooltipHeader = function(code) {{
  if (!code || String(code).indexOf('其余') === 0) return code;
  var info = (window.VOC_ASIN_MAP || {{}})[code];
  if (info && info.asin) {{
    return code + ' · <a href="' + info.url + '" target="_blank" rel="noopener" style="color:#2563eb;text-decoration:underline">' + info.asin + '</a>';
  }}
  return code;
}};
window.vocApplyAsinAxisTooltip = function(opt, axisKey) {{
  axisKey = axisKey || 'x';
  var axis = axisKey === 'y' ? opt.yAxis : opt.xAxis;
  if (!axis || axis.type !== 'category') return;
  opt.tooltip = opt.tooltip || {{}};
  opt.tooltip.trigger = 'axis';
  opt.tooltip.enterable = true;
  opt.tooltip.confine = true;
  opt.tooltip.axisPointer = opt.tooltip.axisPointer || {{type: 'shadow'}};
  opt.tooltip.formatter = function(params) {{
    var items = Array.isArray(params) ? params : [params];
    if (!items.length) return '';
    var code = items[0].axisValue != null ? items[0].axisValue : (items[0].name || '');
    var lines = [window.vocAsinTooltipHeader(code)];
    items.forEach(function(p) {{
      if (p.seriesName == null || p.value == null) return;
      var v = p.value;
      if (Array.isArray(v)) v = v[v.length - 1];
      if (v && typeof v === 'object' && v.value != null) v = v.value;
      lines.push((p.marker || '') + p.seriesName + ': ' + v);
    }});
    return lines.join('<br/>');
  }};
}};"""


def _echarts_init(
    element_id: str,
    option: dict,
    height: Optional[int] = None,
    *,
    asin_category_axis: Optional[str] = None,
) -> str:
    h_js = f"dom.style.height='{height}px';" if height else ""
    apply_js = ""
    if asin_category_axis:
        apply_js = f"if (window.vocApplyAsinAxisTooltip) window.vocApplyAsinAxisTooltip(opt, '{asin_category_axis}');"
    return f"""(function() {{
  var dom = document.getElementById('{element_id}');
  if (!dom) return;
  {h_js}
  var opt = {json.dumps(option, ensure_ascii=False)};
  {apply_js}
  var chart = echarts.init(dom);
  chart.setOption(opt);
  window.addEventListener('resize', function() {{ chart.resize(); }});
}})();"""


def _aggregate_star_dist(asin_list: List[str], star_data: Dict[str, Dict[int, int]]) -> Dict[int, int]:
    agg: Dict[int, int] = {s: 0 for s in (5, 4, 3, 2, 1)}
    for asin in asin_list:
        sd = star_data.get(asin, {})
        for s in agg:
            agg[s] += sd.get(s, 0)
    return agg


def build_overall_charts(
    neg_freq: dict,
    pos_freq: dict,
    neg_themes: list,
) -> str:
    """生成主题频次画像区的全市场图表（negChartOverall / posChartOverall）。"""
    priority_color = {"P0": "#ef4444", "P1": "#f97316", "P2": "#eab308"}
    theme_priority = {t["name"]: t.get("priority", "P2") for t in neg_themes}

    neg_sorted = sorted(neg_freq.items(), key=lambda x: x[1], reverse=True)
    pos_sorted = sorted(pos_freq.items(), key=lambda x: x[1], reverse=True)
    neg_labels = [n for n, _ in neg_sorted]
    neg_data = [c for _, c in neg_sorted]
    pos_labels = [n for n, _ in pos_sorted]
    pos_data = [c for _, c in pos_sorted]
    neg_colors = [priority_color.get(theme_priority.get(n, "P2"), "#94a3b8") for n in neg_labels]

    parts = []
    parts.append("// 整体主题频次 - 差评")
    parts.append(build_horizontal_bar_chart("negChartOverall", neg_labels, neg_data, neg_colors))
    parts.append("// 整体主题频次 - 好评")
    parts.append(build_horizontal_bar_chart("posChartOverall", pos_labels, pos_data, ["#22c55e"] * len(pos_labels)))
    return "\n\n".join(parts)


def build_theme_mini_charts_html(
    prefix: str,
    theme_labels: List[str],
    asin_count: int,
    *,
    large_threshold: int = 30,
) -> str:
    """大品类：每主题 Top N ASIN 小 multiples 的 HTML 容器。"""
    if not theme_labels or asin_count <= large_threshold:
        return ""
    blocks = ['<div class="theme-mini-grid">']
    for i, theme in enumerate(theme_labels):
        blocks.append(
            f'<div class="theme-mini-box"><h4>{theme}</h4>'
            f'<div id="{prefix}Mini{i}" class="theme-mini-chart"></div></div>'
        )
    blocks.append("</div>")
    return "".join(blocks)


def build_all_charts(
    stats: Any,
    neg_themes: List[Dict[str, Any]],
    pos_themes: List[Dict[str, Any]],
    neg_freq: Dict[str, int],
    pos_freq: Dict[str, int],
    per_asin_neg: Dict[str, Dict[str, int]],
    per_asin_pos: Dict[str, Dict[str, int]],
    asin_labels: Optional[Dict[str, str]] = None,
    asin_short_codes: Optional[Dict[str, str]] = None,
    layout: Optional[Dict[str, Any]] = None,
    cfg: Optional[dict] = None,
) -> str:
    """生成所有图表的 JS 代码。"""
    asin_labels = asin_labels or {}
    asin_short_codes = asin_short_codes or asin_labels
    layout = layout or get_chart_layout(stats, cfg)
    parts: List[str] = [build_asin_tooltip_bootstrap(asin_short_codes)]

    asins = [a.asin for a in stats.asins]
    if layout["large_market"]:
        from report_utils import sorted_asin_stats
        asins = [a.asin for a in sorted_asin_stats(stats)]
    else:
        asins = [a.asin for a in sorted(stats.asins, key=lambda a: (-a.avg_rating, -a.total))]
    axis_labels = [asin_short_codes.get(a, a) for a in asins]
    star_data = {a.asin: a.star_dist for a in stats.asins}

    parts.append("// 1. 评分分布堆叠图")
    parts.append(_build_star_dist_echarts(
        axis_labels, star_data, asins,
        horizontal=layout["large_market"],
    ))
    if layout.get("show_star_summary"):
        from report_utils import sorted_asin_stats
        ranked = [a.asin for a in sorted_asin_stats(stats)]
        top_n = int((cfg or {}).get("star_summary_top_n", 15))
        top_asins = ranked[:top_n]
        rest_asins = ranked[top_n:]
        summary_labels = [asin_short_codes.get(a, a) for a in top_asins]
        summary_data = {a: star_data[a] for a in top_asins}
        summary_asins = list(top_asins)
        if rest_asins:
            summary_labels.append(f"其余{len(rest_asins)}款")
            summary_data["__other__"] = _aggregate_star_dist(rest_asins, star_data)
            summary_asins.append("__other__")
        parts.append("// 1b. 评分分布摘要")
        parts.append(_build_star_dist_echarts(
            summary_labels, summary_data, summary_asins,
            element_id="starDistSummaryChart", horizontal=False,
        ))

    neg_sorted = sorted(neg_freq.items(), key=lambda x: x[1], reverse=True)
    pos_sorted = sorted(pos_freq.items(), key=lambda x: x[1], reverse=True)
    neg_labels = [n for n, _ in neg_sorted]
    neg_data = [c for _, c in neg_sorted]
    pos_labels = [n for n, _ in pos_sorted]
    pos_data = [c for _, c in pos_sorted]

    priority_color = {"P0": "#ef4444", "P1": "#f97316", "P2": "#eab308"}
    theme_priority = {t["name"]: t.get("priority", "P2") for t in neg_themes}
    neg_colors = [priority_color.get(theme_priority.get(n, "P2"), "#94a3b8") for n in neg_labels]

    parts.append("// 2. 差评主题")
    parts.append(build_horizontal_bar_chart("negChart", neg_labels, neg_data, neg_colors))
    parts.append("// 3. 好评主题")
    parts.append(build_horizontal_bar_chart("posChart", pos_labels, pos_data, ["#22c55e"] * len(pos_labels)))

    neg_top6 = neg_labels[:6]
    pos_top6 = pos_labels[:6]
    mini_top = int((cfg or {}).get("theme_mini_top_n", 8))

    parts.append("// 4. 各 ASIN 差评主题对比")
    parts.append(_build_per_asin_theme_chart(
        "negChartPerAsin", neg_top6, per_asin_neg, asins,
        axis_labels=axis_labels, asin_full_labels=asin_labels,
        is_neg=True, use_heatmap=layout["use_heatmap"],
    ))
    if layout["use_heatmap"]:
        parts.append(_build_theme_mini_charts_js(
            "neg", neg_top6, per_asin_neg, asins, asin_short_codes, asin_labels,
            is_neg=True, top_n=mini_top,
        ))

    parts.append("// 5. 各 ASIN 好评主题对比")
    parts.append(_build_per_asin_theme_chart(
        "posChartPerAsin", pos_top6, per_asin_pos, asins,
        axis_labels=axis_labels, asin_full_labels=asin_labels,
        is_neg=False, use_heatmap=layout["use_heatmap"],
    ))
    if layout["use_heatmap"]:
        parts.append(_build_theme_mini_charts_js(
            "pos", pos_top6, per_asin_pos, asins, asin_short_codes, asin_labels,
            is_neg=False, top_n=mini_top,
        ))

    return "\n\n".join(parts)


def _build_per_asin_theme_chart(
    element_id: str,
    theme_labels: List[str],
    per_asin_data: Dict[str, Dict[str, int]],
    asins: List[str],
    *,
    axis_labels: Optional[List[str]] = None,
    asin_full_labels: Optional[Dict[str, str]] = None,
    is_neg: bool = True,
    use_heatmap: bool = False,
    asin_labels: Optional[Dict[str, str]] = None,
) -> str:
    """各 ASIN 主题对比：分组柱（X=ASIN，series=主题）或热力图。"""
    if not theme_labels or not asins:
        return f"// skip {element_id}: no data"
    if asin_labels and not axis_labels:
        axis_labels = [asin_labels.get(a, a) for a in asins]
    axis_labels = axis_labels or asins
    asin_full_labels = asin_full_labels or asin_labels or {}

    if use_heatmap:
        return _build_theme_heatmap(
            element_id, theme_labels, per_asin_data, asins,
            axis_labels, asin_full_labels, is_neg=is_neg,
        )

    colors = THEME_COLORS_NEG if is_neg else THEME_COLORS_POS
    series = []
    for i, theme in enumerate(theme_labels):
        series.append({
            "name": theme,
            "type": "bar",
            "data": [per_asin_data.get(asin, {}).get(theme, 0) for asin in asins],
            "itemStyle": {"color": colors[i % len(colors)]},
        })
    option: Dict[str, Any] = {
        "tooltip": {"trigger": "axis", "axisPointer": {"type": "shadow"}},
        "legend": {"top": 0, "type": "scroll", "textStyle": {"fontSize": 10}},
        "grid": {"left": 48, "right": 16, "top": 48, "bottom": 72},
        "xAxis": {
            "type": "category",
            "data": axis_labels,
            "axisLabel": {"fontSize": 9, "rotate": 45, "interval": 0},
        },
        "yAxis": {"type": "value"},
        "series": series,
    }
    if len(asins) > 12:
        end_pct = min(100, round(12 / len(asins) * 100))
        option["dataZoom"] = [
            {"type": "inside", "start": 0, "end": end_pct},
            {"type": "slider", "start": 0, "end": end_pct, "bottom": 8, "height": 18},
        ]
        option["grid"]["bottom"] = 96
    return _echarts_init(element_id, option, asin_category_axis="x")


def _build_theme_heatmap(
    element_id: str,
    theme_labels: List[str],
    per_asin_data: Dict[str, Dict[str, int]],
    asins: List[str],
    axis_labels: List[str],
    asin_full_labels: Dict[str, str],
    *,
    is_neg: bool = True,
) -> str:
    data = []
    max_val = 1
    for yi, theme in enumerate(theme_labels):
        for xi, asin in enumerate(asins):
            v = per_asin_data.get(asin, {}).get(theme, 0)
            max_val = max(max_val, v)
            data.append([xi, yi, v])
    colors = ["#fef2f2", "#fca5a5", "#ef4444", "#b91c1c"] if is_neg else ["#f0fdf4", "#86efac", "#22c55e", "#15803d"]
    end_pct = min(100, max(15, round(20 / max(len(asins), 1) * 100)))
    option = {
        "grid": {"left": 88, "right": 56, "top": 24, "bottom": 72},
        "xAxis": {
            "type": "category",
            "data": axis_labels,
            "splitArea": {"show": True},
            "axisLabel": {"fontSize": 9, "rotate": 45, "interval": 0},
        },
        "yAxis": {
            "type": "category",
            "data": theme_labels,
            "splitArea": {"show": True},
            "axisLabel": {"fontSize": 10},
        },
        "visualMap": {
            "min": 0,
            "max": max_val,
            "calculable": True,
            "orient": "vertical",
            "right": 8,
            "top": "center",
            "inRange": {"color": colors},
            "text": ["高", "低"],
        },
        "dataZoom": [
            {"type": "inside", "xAxisIndex": 0, "start": 0, "end": end_pct},
            {"type": "slider", "xAxisIndex": 0, "bottom": 8, "height": 18, "start": 0, "end": end_pct},
        ],
        "series": [{
            "name": "命中数",
            "type": "heatmap",
            "data": data,
            "label": {"show": False},
            "emphasis": {"itemStyle": {"shadowBlur": 6, "shadowColor": "rgba(0,0,0,0.2)"}},
        }],
    }
    full_map = {axis_labels[i]: asin_full_labels.get(asins[i], asins[i]) for i in range(len(asins))}
    js_option = json.dumps(option, ensure_ascii=False)
    return f"""(function() {{
  var dom = document.getElementById('{element_id}');
  if (!dom) return;
  var opt = {js_option};
  var fullMap = {json.dumps(full_map, ensure_ascii=False)};
  opt.tooltip = {{
    position: 'top',
    enterable: true,
    confine: true,
    formatter: function(p) {{
      if (!p.data) return '';
      var code = (opt.xAxis.data[p.data[0]] || '');
      var theme = (opt.yAxis.data[p.data[1]] || '');
      var head = window.vocAsinTooltipHeader ? window.vocAsinTooltipHeader(code) : (fullMap[code] || code);
      return head + '<br/>' + theme + ': ' + p.data[2];
    }}
  }};
  var chart = echarts.init(dom);
  chart.setOption(opt);
  window.addEventListener('resize', function() {{ chart.resize(); }});
}})();"""


def _build_theme_mini_charts_js(
    prefix: str,
    theme_labels: List[str],
    per_asin_data: Dict[str, Dict[str, int]],
    asins: List[str],
    asin_short: Dict[str, str],
    asin_full: Dict[str, str],
    *,
    is_neg: bool = True,
    top_n: int = 8,
) -> str:
    _ = asin_full
    parts = []
    color = "#ef4444" if is_neg else "#22c55e"
    for i, theme in enumerate(theme_labels):
        ranked = sorted(
            ((asin, per_asin_data.get(asin, {}).get(theme, 0)) for asin in asins),
            key=lambda x: (-x[1], x[0]),
        )
        top = [(a, c) for a, c in ranked if c > 0][:top_n]
        if not top:
            top = ranked[: min(top_n, len(ranked))]
        labels = [asin_short.get(a, a) for a, _ in top]
        values = [c for _, c in top]
        parts.append(build_horizontal_bar_chart(
            f"{prefix}Mini{i}", labels, values, [color] * len(labels),
            height=200, asin_category_axis="y",
        ))
    return "\n\n".join(parts)


def _build_star_dist_echarts(
    chart_labels: List[str],
    star_data: Dict[str, Dict[int, int]],
    asins: List[str],
    *,
    element_id: str = "starDistChart",
    horizontal: bool = False,
) -> str:
    """评分分布堆叠图；大品类用横向堆叠。"""
    colors_5 = ["#22c55e", "#86efac", "#d1d5db", "#fbbf24", "#ef4444"]
    series = []
    for star in [5, 4, 3, 2, 1]:
        series.append({
            "name": f"{star}★",
            "type": "bar",
            "stack": "total",
            "data": [star_data.get(a, {}).get(star, 0) for a in asins],
            "itemStyle": {"color": colors_5[5 - star]},
        })
    if horizontal:
        option = {
            "tooltip": {"trigger": "axis", "axisPointer": {"type": "shadow"}},
            "legend": {"top": 0, "textStyle": {"fontSize": 11}},
            "grid": {"left": 72, "right": 24, "top": 36, "bottom": 24},
            "xAxis": {"type": "value"},
            "yAxis": {
                "type": "category",
                "data": chart_labels,
                "inverse": True,
                "axisLabel": {"fontSize": 10, "width": 64, "overflow": "truncate"},
            },
            "series": series,
        }
    else:
        option = {
            "tooltip": {"trigger": "axis", "axisPointer": {"type": "shadow"}},
            "legend": {"bottom": 0, "textStyle": {"fontSize": 11}},
            "grid": {"left": 50, "right": 20, "top": 20, "bottom": 40},
            "xAxis": {
                "type": "category",
                "data": chart_labels,
                "axisLabel": {"fontSize": 10, "rotate": 30 if len(chart_labels) > 8 else 0},
            },
            "yAxis": {"type": "value"},
            "series": series,
        }
    axis_key = "y" if horizontal else "x"
    return _echarts_init(element_id, option, asin_category_axis=axis_key)


# ── 图表数据计算辅助 ──

_STRONG_HINTS = (
    "waste", "charge", "broken", "stopped", "doesn't", "does not", "not worth",
    "terrible", "horrible", "useless", "defect", "return", "refund", "pull",
    "nick", "burn", "bleed", "cut", "irritat", "bump", "overheat", "loud",
    "durable", "quality", "shave", "trim", "waterproof", "battery",
)


def _is_strong_keyword(kw: str) -> bool:
    if len(kw) >= 12:
        return True
    return any(h in kw for h in _STRONG_HINTS)


def _match_theme_in_text(keywords: List[str], text: str) -> bool:
    from report_utils import match_text
    return match_text(keywords, text)


def calc_keyword_group_freq(
    reviews: List[Any],
    keywords: List[str],
    is_neg: bool = True,
) -> int:
    """词组频次：组内任一词命中即计 1，同一评论只计 1 次；按星级过滤。"""
    kws = [kw.lower().strip() for kw in keywords if kw and kw.strip()]
    if not kws:
        return 0
    count = 0
    for r in reviews:
        if is_neg and r.rating > 2:
            continue
        if not is_neg and r.rating < 4:
            continue
        text = (r.title + " " + r.content).lower()
        if _match_theme_in_text(kws, text):
            count += 1
    return count


def calc_theme_freq(
    themes: List[Dict[str, Any]],
    reviews: List[Any],
    is_neg: bool = True,
) -> Dict[str, int]:
    """用主题 keywords（英文聚类短语 + LLM 关键词）统计频次。"""
    freq: Dict[str, int] = {}
    for theme in themes:
        keywords = [kw.lower().strip() for kw in theme.get("keywords", []) if kw.strip()]
        count = 0
        for r in reviews:
            if is_neg and r.rating > 2:
                continue
            if not is_neg and r.rating < 4:
                continue
            text = (r.title + " " + r.content).lower()
            if _match_theme_in_text(keywords, text):
                count += 1
        freq[theme["name"]] = count
    return freq


def calc_per_asin_theme_freq(
    themes: List[Dict[str, Any]],
    reviews: List[Any],
    is_neg: bool = True,
) -> Dict[str, Dict[str, int]]:
    """按 ASIN 分别统计各主题频次。"""
    from collections import defaultdict
    result: Dict[str, Dict[str, int]] = defaultdict(lambda: defaultdict(int))
    for theme in themes:
        keywords = [kw.lower().strip() for kw in theme.get("keywords", []) if kw.strip()]
        name = theme["name"]
        for r in reviews:
            if is_neg and r.rating > 2:
                continue
            if not is_neg and r.rating < 4:
                continue
            text = (r.title + " " + r.content).lower()
            if _match_theme_in_text(keywords, text):
                result[r.asin][name] += 1
    return {asin: dict(counts) for asin, counts in result.items()}