"""
services/ppt_generator.py
OpenClaw 簡報生成器 — 精品深色主題版 (2026-04-20)

函數清單（與 openclaw_bot_routes.py 呼叫約定一致）:
  check_pptx_available()
  generate_daily_ppt(date_str, db_data, ai_text) -> str
  generate_weekly_ppt(db_data, ai_text) -> str
  generate_monthly_ppt(yr, mo, db_data, ai_text) -> str
  generate_strategy_ppt(date_str, db_data, ai_text) -> str
  generate_competitor_ppt(period_label, db_data, ai_text) -> str
  generate_promo_ppt(promo_label, data, ai_text) -> str

設計規格（依截圖還原）:
  - 16:9  (25.4cm × 14.29cm)
  - 封面：深海藍背景 #0D1B2A、橘色品牌條 #FF5722、白色大標
  - P2   ：KPI 卡片（藍 #1565C0、綠 #2E7D32、橘 #E65100）+ 橫條圖
  - P3   ：商品比較表（白底、斑馬條紋、紅/綠價差顏色）
  - 頁眉 ：橘色標題帶 #FF5722（所有非封面頁）
  - 頁腳 ：♥ Powered by OpenClaw（深灰 #37474F）
"""
import os
import uuid
from datetime import datetime
from pathlib import Path

REPORTS_DIR = Path(os.environ.get("REPORTS_DIR", "/app/data/reports"))
REPORTS_DIR.mkdir(parents=True, exist_ok=True)

# ── 調色盤 ────────────────────────────────────────────────────────────────────
_BG_DARK     = "0D1B2A"   # 封面深藍背景
_BRAND_OG    = "FF5722"   # 橘色品牌 / 頁眉
_BRAND_OG2   = "E65100"   # 深橘（KPI卡）
_WHITE       = "FFFFFF"
_LIGHT_GRAY  = "F5F5F5"   # 斑馬偶數行
_DARK_TEXT   = "212121"
_SUBTEXT     = "757575"
_FOOTER_BG   = "37474F"
_BLUE_KPI    = "1565C0"
_GREEN_KPI   = "2E7D32"
_RED_WARN    = "C62828"
_BAR_PCHOME  = "EF5350"   # PChome 橫條
_BAR_MOMO    = "66BB6A"   # momo 橫條
_BAR_TIE     = "FFA726"   # 持平橫條
_BAR_MISS    = "9E9E9E"   # 未找到橫條


def check_pptx_available() -> bool:
    try:
        import pptx  # noqa: F401
        return True
    except ImportError:
        return False


def _new_path(kind: str) -> str:
    rid = uuid.uuid4().hex[:8]
    return str(REPORTS_DIR / f"ocbot_{kind}_{rid}.pptx")


# ── 基礎繪圖工具 ──────────────────────────────────────────────────────────────
def _rgb(hex6: str):
    from pptx.dml.color import RGBColor
    return RGBColor(int(hex6[0:2], 16), int(hex6[2:4], 16), int(hex6[4:6], 16))


def _emu(cm: float):
    from pptx.util import Cm
    return Cm(cm)


def _pt(pt: float):
    from pptx.util import Pt
    return Pt(pt)


def _fill_solid(shape, hex6: str):
    shape.fill.solid()
    shape.fill.fore_color.rgb = _rgb(hex6)


def _no_line(shape):
    from pptx.util import Pt
    shape.line.color.rgb = _rgb(_WHITE)
    shape.line.width = Pt(0)


def _add_rect(slide, l, t, w, h, fill_hex, line_hex=None):
    from pptx.util import Pt
    s = slide.shapes.add_shape(1, _emu(l), _emu(t), _emu(w), _emu(h))
    _fill_solid(s, fill_hex)
    if line_hex:
        s.line.color.rgb = _rgb(line_hex)
        s.line.width = Pt(0.5)
    else:
        s.line.fill.background()
    return s


def _add_text(slide, text, l, t, w, h,
              bold=False, size=14, color=_WHITE,
              align="left", valign="top", wrap=True):
    from pptx.util import Pt
    from pptx.enum.text import PP_ALIGN
    from pptx.dml.color import RGBColor
    from pptx.oxml.ns import qn
    import lxml.etree as etree

    txb = slide.shapes.add_textbox(_emu(l), _emu(t), _emu(w), _emu(h))
    tf  = txb.text_frame
    tf.word_wrap = wrap
    # vertical align
    if valign == "middle":
        from pptx.enum.text import MSO_ANCHOR
        tf.vertical_anchor = MSO_ANCHOR.MIDDLE
    p = tf.paragraphs[0]
    p.text = text
    run = p.runs[0]
    run.font.bold = bold
    run.font.size = Pt(size)
    run.font.color.rgb = RGBColor(
        int(color[0:2], 16), int(color[2:4], 16), int(color[4:6], 16))
    if align == "center":
        p.alignment = PP_ALIGN.CENTER
    elif align == "right":
        p.alignment = PP_ALIGN.RIGHT
    return txb


def _add_footer(slide, prs_w_cm=33.87):
    """♥ Powered by OpenClaw 頁腳條"""
    _add_rect(slide, 0, 13.5, prs_w_cm, 0.79, _FOOTER_BG)
    _add_text(slide, "♥  Powered by OpenClaw",
              prs_w_cm - 6, 13.55, 5.8, 0.7,
              size=8, color=_BRAND_OG, align="right")


def _add_header(slide, title_text, prs_w_cm=33.87):
    """橘色頁眉帶"""
    _add_rect(slide, 0, 0, prs_w_cm, 1.5, _BRAND_OG)
    _add_text(slide, title_text, 0.5, 0.1, prs_w_cm - 1, 1.3,
              bold=True, size=20, color=_WHITE, valign="middle")


def _kpi_card(slide, l, t, w, h, fill, label, value, sub=""):
    _add_rect(slide, l, t, w, h, fill)
    _add_text(slide, label, l + 0.2, t + 0.2,  w - 0.4, 0.7,
              size=10, color=_WHITE)
    _add_text(slide, value, l + 0.2, t + 0.7,  w - 0.4, 1.3,
              bold=True, size=28, color=_WHITE, align="center")
    if sub:
        _add_text(slide, sub, l + 0.2, t + h - 0.65, w - 0.4, 0.6,
                  size=9, color=_WHITE)


def _horiz_bar(slide, l, t, h_row, label, value, total, fill_hex, max_w=14.0):
    """單條橫條圖（label 在左，bar 居中，百分比在右）"""
    pct = value / total if total else 0
    bar_w = max(0.2, pct * max_w)
    _add_text(slide, label, l, t + 0.05, 3.0, h_row - 0.1,
              size=10, color=_DARK_TEXT)
    _add_rect(slide, l + 3.1, t + 0.1, bar_w, h_row - 0.2, fill_hex)
    _add_text(slide, f"{value}件 ({pct*100:.0f}%)",
              l + 3.2 + bar_w, t + 0.05, 4.0, h_row - 0.1,
              size=10, color=_DARK_TEXT)


# ── 封面頁 ────────────────────────────────────────────────────────────────────
def _cover_slide(prs, big_title: str, sub1: str, sub2: str = ""):
    from pptx.util import Cm
    slide = prs.slides.add_slide(prs.slide_layouts[6])  # blank
    W = 33.87

    # 全頁深色背景
    _add_rect(slide, 0, 0, W, 19.05, _BG_DARK)

    # 左側橘色品牌條（細）
    _add_rect(slide, 0, 0, 0.6, 19.05, _BRAND_OG)

    # 品牌標籤
    _add_rect(slide, 1.2, 1.2, 3.5, 0.7, _BRAND_OG)
    _add_text(slide, "OPENCLAW", 1.3, 1.22, 3.3, 0.66,
              bold=True, size=11, color=_WHITE, align="center", valign="middle")

    # 大標題
    _add_text(slide, big_title, 1.2, 2.3, 20, 3.5,
              bold=True, size=38, color=_WHITE)

    # 副標
    _add_text(slide, sub1, 1.2, 6.0, 22, 0.9,
              size=14, color="BDBDBD")
    if sub2:
        _add_text(slide, sub2, 1.2, 7.0, 22, 0.8,
                  size=12, color="9E9E9E")

    # 右側裝飾線
    _add_rect(slide, W - 0.8, 0, 0.8, 19.05, _BRAND_OG2)

    _add_footer(slide, W)
    return slide


# ── 競品 PPT — 完整版 ─────────────────────────────────────────────────────────
def generate_competitor_ppt(period_label: str, db_data: dict, ai_text: str) -> str:
    from pptx import Presentation
    from pptx.util import Cm

    prs = Presentation()
    prs.slide_width  = Cm(33.87)
    prs.slide_height = Cm(19.05)
    W = 33.87

    results     = db_data.get("results", [])
    found       = [r for r in results if r.get("found")]
    pc_wins     = [r for r in found if r.get("price_diff", 0) > 10]
    mo_wins     = [r for r in found if r.get("price_diff", 0) < -10]
    tie         = [r for r in found if abs(r.get("price_diff", 0)) <= 10]
    not_found   = [r for r in results if not r.get("found")]
    total       = len(results)
    match_rate  = len(found) / total * 100 if total else 0
    avg_pct     = (sum(r.get("price_diff_pct", 0) for r in found) / len(found)
                   if found else 0)
    momo_rev    = db_data.get("momo_revenue", 0)

    # ── P1 封面 ───────────────────────────────────────────────────────────────
    _cover_slide(
        prs,
        f"momo vs PChome\n競品比較分析",
        f"掃描 {total} 件熱銷商品｜比對成功 {len(found)} 件",
        f"分析週期：{period_label}　　平均價差：{avg_pct:+.1f}%　　生成時間：{datetime.now().strftime('%Y/%m/%d %H:%M')}",
    )

    # ── P2 KPI 摘要 + 橫條圖 ─────────────────────────────────────────────────
    s2 = prs.slides.add_slide(prs.slide_layouts[6])
    _add_rect(s2, 0, 0, W, 19.05, _WHITE)
    _add_header(s2, f"競品比較 KPI 摘要 — {period_label}")

    # 四個 KPI 卡（L→R）
    cards = [
        (_BLUE_KPI,  "掃描商品數",   str(total),         f"{total} 件熱銷商品"),
        ("1565C0",   "比對成功率",   f"{match_rate:.0f}%", f"{len(found)} 件成功"),
        (_GREEN_KPI, "PChome 優勢",  f"{len(pc_wins)}/{len(found)}", f"{len(pc_wins)} 件 PChome 更便宜"),
        (_BRAND_OG2, "momo 優勢",    f"{len(mo_wins)}/{len(found)}", f"{len(mo_wins)} 件 momo 更便宜"),
    ]
    card_w, card_gap, card_t = 7.4, 0.4, 1.8
    for i, (col, lbl, val, sub) in enumerate(cards):
        _kpi_card(s2, i * (card_w + card_gap) + 0.5, card_t, card_w, 3.2, col, lbl, val, sub)

    # 整體趨勢橫幅
    trend_color = _RED_WARN if avg_pct < -3 else (_BRAND_OG if avg_pct > 3 else "FFA726")
    trend_icon  = "⚠️ momo 整體偏貴" if avg_pct < -3 else ("✅ momo 整體具優勢" if avg_pct > 3 else "➖ 整體持平")
    _add_rect(s2, 0.5, 5.3, W - 1, 0.85, trend_color)
    _add_text(s2, f"整體定價態勢：{trend_icon}    平均價差 {avg_pct:+.1f}%（正值=momo偏貴）",
              0.7, 5.35, W - 1.4, 0.75, bold=True, size=13, color=_WHITE)

    # 橫條圖（4 種結果）
    bar_data = [
        ("PChome 更便宜", len(pc_wins),  total, _BAR_PCHOME),
        ("momo 更便宜",   len(mo_wins),  total, _BAR_MOMO),
        ("價格相近",      len(tie),      total, _BAR_TIE),
        ("未找到對應",    len(not_found),total, _BAR_MISS),
    ]
    row_t = 6.4
    for label, val, tot, col in bar_data:
        _horiz_bar(s2, 0.8, row_t, 0.9, label, val, tot, col, max_w=16.0)
        row_t += 1.0

    # momo 總業績備注
    if momo_rev:
        _add_text(s2, f"本期 momo 掃描商品總業績：NT$ {momo_rev:,.0f}（{momo_rev/10000:.1f}萬）",
                  0.8, 11.8, W - 1.6, 0.7, size=10, color=_SUBTEXT)

    _add_footer(s2, W)

    # ── P3 商品比較表 ─────────────────────────────────────────────────────────
    s3 = prs.slides.add_slide(prs.slide_layouts[6])
    _add_rect(s3, 0, 0, W, 19.05, _WHITE)
    _add_header(s3, f"PChome 業績優勢 — 比 momo 熱銷 TOP10")

    # 表頭
    cols = ["#", "momo 商品", "momo 定價", "PChome 商品", "PChome 定價", "價差", "趨勢"]
    col_w = [0.8, 8.5, 2.8, 8.5, 2.8, 2.5, 2.0]
    x = 0.3
    for i, (c, w) in enumerate(zip(cols, col_w)):
        _add_rect(s3, x, 1.7, w, 0.7, _BRAND_OG)
        _add_text(s3, c, x + 0.05, 1.72, w - 0.1, 0.66,
                  bold=True, size=9, color=_WHITE, align="center")
        x += w + 0.1

    # 資料行（最多 10 行）
    rows = (pc_wins + mo_wins)[:10]
    for ri, r in enumerate(rows):
        bg = _LIGHT_GRAY if ri % 2 == 0 else _WHITE
        x  = 0.3
        diff   = r.get("price_diff", 0)
        pct    = r.get("price_diff_pct", 0)
        diff_c = _RED_WARN if diff < -10 else (_GREEN_KPI if diff > 10 else _DARK_TEXT)
        trend  = "📈 PChome貴" if diff > 10 else ("📉 momo貴" if diff < -10 else "➖")
        cells  = [
            (str(ri + 1),               _DARK_TEXT),
            (r.get("momo_name","")[:24],_DARK_TEXT),
            (f"NT${r.get('momo_price',0):,.0f}", _DARK_TEXT),
            (r.get("pc_name","")[:24],  _DARK_TEXT),
            (f"NT${r.get('pc_price',0):,.0f}",   _DARK_TEXT),
            (f"{diff:+,.0f} ({pct:+.1f}%)",      diff_c),
            (trend,                               diff_c),
        ]
        row_t = 2.5 + ri * 0.9
        for (txt, tc), w in zip(cells, col_w):
            _add_rect(s3, x, row_t, w, 0.85, bg)
            _add_text(s3, txt, x + 0.05, row_t + 0.05, w - 0.1, 0.75,
                      size=8, color=tc, align="center")
            x += w + 0.1

    _add_footer(s3, W)

    # ── P4 AI 洞察 ────────────────────────────────────────────────────────────
    s4 = prs.slides.add_slide(prs.slide_layouts[6])
    _add_rect(s4, 0, 0, W, 19.05, _BG_DARK)
    _add_header(s4, "AI 競品洞察 — 策略建議")
    _add_text(s4, ai_text or "（AI 分析生成中）",
              1.0, 2.0, W - 2.0, 11.0,
              size=13, color=_WHITE, wrap=True)
    _add_footer(s4, W)

    path = _new_path("competitor")
    prs.save(path)
    return path


# ── 日報 PPT ──────────────────────────────────────────────────────────────────
def generate_daily_ppt(date_str: str, db_data, ai_text: str) -> str:
    from pptx import Presentation
    from pptx.util import Cm

    prs = Presentation()
    prs.slide_width  = Cm(33.87)
    prs.slide_height = Cm(19.05)
    W = 33.87

    s  = db_data.get("sales", {}) if isinstance(db_data, dict) else {}
    tp = db_data.get("top_products", []) if isinstance(db_data, dict) else []

    rev   = float(s.get("revenue", 0))
    ord_  = int(s.get("orders",  0))
    gm    = float(s.get("gross_margin", 0))
    aov   = float(s.get("avg_order", 0))

    # 封面
    _cover_slide(prs,
        f"日報  {date_str}",
        f"業績 NT${rev:,.0f}（{rev/10000:.1f}萬）｜訂單 {ord_:,} 筆",
        f"毛利率 {gm:.1f}%　客單價 NT${aov:,.0f}　生成 {datetime.now().strftime('%Y/%m/%d %H:%M')}",
    )

    # P2：KPI 卡 + TOP5
    s2 = prs.slides.add_slide(prs.slide_layouts[6])
    _add_rect(s2, 0, 0, W, 19.05, _WHITE)
    _add_header(s2, f"業績 KPI — {date_str}")

    kpis = [
        (_BLUE_KPI,  "總業績",     f"NT${rev/10000:.1f}萬", ""),
        (_GREEN_KPI, "總訂單",     f"{ord_:,} 筆",           ""),
        (_BRAND_OG2, "毛利率",     f"{gm:.1f}%",             ""),
        (_FOOTER_BG, "客單價",     f"NT${aov:,.0f}",         ""),
    ]
    card_w = 7.4
    for i, (col, lbl, val, sub) in enumerate(kpis):
        _kpi_card(s2, i * (card_w + 0.4) + 0.5, 1.8, card_w, 3.0, col, lbl, val, sub)

    # TOP5 商品
    _add_rect(s2, 0.5, 5.2, W - 1, 0.7, _BRAND_OG)
    _add_text(s2, "🏆 TOP 5 熱銷商品", 0.7, 5.25, W - 1.4, 0.6,
              bold=True, size=13, color=_WHITE)
    for i, p in enumerate(tp[:5]):
        bg = _LIGHT_GRAY if i % 2 == 0 else _WHITE
        _add_rect(s2, 0.5, 6.0 + i * 0.85, W - 1, 0.82, bg)
        name = str(p.get("name",""))[:45]
        rev_p = float(p.get("revenue", 0))
        _add_text(s2, f"{i+1}. {name}", 0.7, 6.05 + i * 0.85, W - 9, 0.72,
                  size=10, color=_DARK_TEXT)
        _add_text(s2, f"NT${rev_p:,.0f}", W - 7.5, 6.05 + i * 0.85, 5, 0.72,
                  size=10, color=_DARK_TEXT, align="right")
    _add_footer(s2, W)

    # P3：AI
    s3 = prs.slides.add_slide(prs.slide_layouts[6])
    _add_rect(s3, 0, 0, W, 19.05, _BG_DARK)
    _add_header(s3, "AI 洞察分析")
    _add_text(s3, ai_text or "（AI 分析生成中）",
              1.0, 2.0, W - 2.0, 11.0, size=13, color=_WHITE, wrap=True)
    _add_footer(s3, W)

    path = _new_path("daily")
    prs.save(path)
    return path


# ── 週報 ──────────────────────────────────────────────────────────────────────
def generate_weekly_ppt(db_data, ai_text: str) -> str:
    from pptx import Presentation
    from pptx.util import Cm
    prs = Presentation()
    prs.slide_width  = Cm(33.87)
    prs.slide_height = Cm(19.05)
    W = 33.87

    _cover_slide(prs, "週報分析", "近 7 日業績週報",
                 f"生成 {datetime.now().strftime('%Y/%m/%d %H:%M')}")
    s2 = prs.slides.add_slide(prs.slide_layouts[6])
    _add_rect(s2, 0, 0, W, 19.05, _BG_DARK)
    _add_header(s2, "週報 AI 洞察")
    _add_text(s2, ai_text or "(暫無 AI 分析)", 1.0, 2.0, W - 2.0, 11.0,
              size=13, color=_WHITE, wrap=True)
    _add_footer(s2, W)
    path = _new_path("weekly")
    prs.save(path)
    return path


# ── 月報 ──────────────────────────────────────────────────────────────────────
def generate_monthly_ppt(yr, mo, db_data, ai_text: str) -> str:
    from pptx import Presentation
    from pptx.util import Cm
    prs = Presentation()
    prs.slide_width  = Cm(33.87)
    prs.slide_height = Cm(19.05)
    W = 33.87

    _cover_slide(prs, f"月報  {yr}/{mo:02d}", f"{yr} 年 {mo} 月業績月報",
                 f"生成 {datetime.now().strftime('%Y/%m/%d %H:%M')}")
    s2 = prs.slides.add_slide(prs.slide_layouts[6])
    _add_rect(s2, 0, 0, W, 19.05, _BG_DARK)
    _add_header(s2, f"月報 AI 洞察 — {yr}/{mo:02d}")
    _add_text(s2, ai_text or "(暫無 AI 分析)", 1.0, 2.0, W - 2.0, 11.0,
              size=13, color=_WHITE, wrap=True)
    _add_footer(s2, W)
    path = _new_path("monthly")
    prs.save(path)
    return path


# ── 策略報告 ──────────────────────────────────────────────────────────────────
def generate_strategy_ppt(date_str: str, db_data, ai_text: str) -> str:
    from pptx import Presentation
    from pptx.util import Cm
    prs = Presentation()
    prs.slide_width  = Cm(33.87)
    prs.slide_height = Cm(19.05)
    W = 33.87

    s  = db_data.get("sales", {}) if isinstance(db_data, dict) else {}
    rev = float(s.get("revenue", 0))
    period = db_data.get("period_label", date_str) if isinstance(db_data, dict) else date_str

    _cover_slide(prs, f"策略報告\n{period}",
                 f"業績 NT${rev:,.0f}（{rev/10000:.1f}萬）",
                 f"生成 {datetime.now().strftime('%Y/%m/%d %H:%M')}")

    # KPI
    ord_  = int(s.get("orders", 0))
    gm    = float(s.get("gross_margin", 0))
    aov   = float(s.get("avg_order", 0))
    s2 = prs.slides.add_slide(prs.slide_layouts[6])
    _add_rect(s2, 0, 0, W, 19.05, _WHITE)
    _add_header(s2, f"策略 KPI — {period}")
    kpis = [
        (_BLUE_KPI,  "總業績",   f"NT${rev/10000:.1f}萬", ""),
        (_GREEN_KPI, "總訂單",   f"{ord_:,} 筆",           ""),
        (_BRAND_OG2, "毛利率",   f"{gm:.1f}%",             ""),
        (_FOOTER_BG, "客單價",   f"NT${aov:,.0f}",         ""),
    ]
    for i, (col, lbl, val, sub) in enumerate(kpis):
        _kpi_card(s2, i * 7.8 + 0.5, 1.8, 7.4, 3.0, col, lbl, val, sub)

    # TOP 商品
    tp = db_data.get("top_products", []) if isinstance(db_data, dict) else []
    _add_rect(s2, 0.5, 5.2, W - 1, 0.65, _BRAND_OG)
    _add_text(s2, "🏆 TOP 熱銷商品", 0.7, 5.25, W - 1.4, 0.55,
              bold=True, size=12, color=_WHITE)
    for i, p in enumerate(tp[:5]):
        bg = _LIGHT_GRAY if i % 2 == 0 else _WHITE
        _add_rect(s2, 0.5, 6.0 + i * 0.8, W - 1, 0.78, bg)
        _add_text(s2, f"{i+1}. {str(p.get('name',''))[:45]}",
                  0.7, 6.04 + i * 0.8, W - 9, 0.7, size=9, color=_DARK_TEXT)
        _add_text(s2, f"NT${float(p.get('revenue',0)):,.0f}",
                  W - 7.5, 6.04 + i * 0.8, 5, 0.7,
                  size=9, color=_DARK_TEXT, align="right")
    _add_footer(s2, W)

    # AI
    s3 = prs.slides.add_slide(prs.slide_layouts[6])
    _add_rect(s3, 0, 0, W, 19.05, _BG_DARK)
    _add_header(s3, "AI 策略洞察")
    _add_text(s3, ai_text or "(暫無 AI 分析)", 1.0, 2.0, W - 2.0, 11.0,
              size=13, color=_WHITE, wrap=True)
    _add_footer(s3, W)
    path = _new_path("strategy")
    prs.save(path)
    return path


# ── 促銷報告 ──────────────────────────────────────────────────────────────────
def generate_promo_ppt(promo_label: str, data, ai_text: str) -> str:
    from pptx import Presentation
    from pptx.util import Cm
    prs = Presentation()
    prs.slide_width  = Cm(33.87)
    prs.slide_height = Cm(19.05)
    W = 33.87

    _cover_slide(prs, f"促銷報告\n{promo_label}", "",
                 f"生成 {datetime.now().strftime('%Y/%m/%d %H:%M')}")
    s2 = prs.slides.add_slide(prs.slide_layouts[6])
    _add_rect(s2, 0, 0, W, 19.05, _BG_DARK)
    _add_header(s2, f"促銷 AI 洞察 — {promo_label}")
    _add_text(s2, ai_text or "(暫無 AI 分析)", 1.0, 2.0, W - 2.0, 11.0,
              size=13, color=_WHITE, wrap=True)
    _add_footer(s2, W)
    path = _new_path("promo")
    prs.save(path)
    return path