"""
services/ppt_generator.py
緊急復原版 (2026-04-18) — 原始檔案 4/17 間遺失
依 openclaw_bot_routes.py 呼叫約定提供 7 個 function:
  check_pptx_available, generate_daily_ppt, generate_weekly_ppt,
  generate_monthly_ppt, generate_strategy_ppt, generate_competitor_ppt,
  generate_promo_ppt
每個 generate_* 回傳 pptx 檔案路徑 (str)。
"""
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)


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")


def _format_data(data) -> str:
    if data is None:
        return "(無資料)"
    if isinstance(data, dict):
        if not data:
            return "(空 dict)"
        lines = []
        for k, v in list(data.items())[:30]:
            line = f"• {k}: {v}"
            lines.append(line[:200])
        return "\n".join(lines)
    if isinstance(data, list):
        if not data:
            return "(空 list)"
        lines = []
        for item in data[:20]:
            lines.append(f"• {str(item)[:200]}")
        return "\n".join(lines)
    return str(data)[:2000]


def _build_ppt(filename_kind: str, title: str, subtitle: str, sections: list) -> str:
    """sections = [(heading, body), ...]"""
    from pptx import Presentation
    from pptx.util import Pt

    prs = Presentation()

    # 標題頁
    s = prs.slides.add_slide(prs.slide_layouts[0])
    if s.shapes.title is not None:
        s.shapes.title.text = title
    if len(s.placeholders) > 1:
        s.placeholders[1].text = subtitle

    # 內容頁
    for heading, body in sections:
        s = prs.slides.add_slide(prs.slide_layouts[1])
        if s.shapes.title is not None:
            s.shapes.title.text = heading
        body_text = body if isinstance(body, str) else _format_data(body)
        body_text = body_text[:3500]
        if len(s.placeholders) > 1:
            tf = s.placeholders[1].text_frame
            tf.text = body_text
            for p in tf.paragraphs:
                for r in p.runs:
                    r.font.size = Pt(14)

    # 產生路徑並存檔
    path = _new_path(filename_kind)
    prs.save(path)
    return path


def generate_daily_ppt(date_str: str, db_data, ai_text: str) -> str:
    sections = [
        ("本日銷售概況", _format_data(db_data)),
        ("AI 洞察", ai_text or "(暫無 AI 分析)"),
    ]
    return _build_ppt(
        "daily_daily",
        f"日報 {date_str}",
        f"生成時間 {datetime.now().strftime('%Y-%m-%d %H:%M')}",
        sections,
    )


def generate_weekly_ppt(db_data, ai_text: str) -> str:
    sections = [
        ("本週銷售概況", _format_data(db_data)),
        ("AI 洞察", ai_text or "(暫無 AI 分析)"),
    ]
    return _build_ppt(
        "weekly",
        "週報",
        f"生成時間 {datetime.now().strftime('%Y-%m-%d %H:%M')}",
        sections,
    )


def generate_monthly_ppt(yr, mo, db_data, ai_text: str) -> str:
    sections = [
        (f"{yr}/{mo} 月度概況", _format_data(db_data)),
        ("AI 洞察", ai_text or "(暫無 AI 分析)"),
    ]
    return _build_ppt(
        "monthly",
        f"月報 {yr}/{mo}",
        f"生成時間 {datetime.now().strftime('%Y-%m-%d %H:%M')}",
        sections,
    )


def generate_strategy_ppt(date_str: str, db_data, ai_text: str) -> str:
    sections = [
        ("策略資料", _format_data(db_data)),
        ("AI 洞察", ai_text or "(暫無 AI 分析)"),
    ]
    return _build_ppt(
        "strategy",
        f"策略報告 {date_str}",
        f"生成時間 {datetime.now().strftime('%Y-%m-%d %H:%M')}",
        sections,
    )


def generate_competitor_ppt(period_label: str, db_data, ai_text: str) -> str:
    sections = [
        (f"競品資料 ({period_label})", _format_data(db_data)),
        ("AI 洞察", ai_text or "(暫無 AI 分析)"),
    ]
    return _build_ppt(
        "competitor",
        f"競品分析 {period_label}",
        f"生成時間 {datetime.now().strftime('%Y-%m-%d %H:%M')}",
        sections,
    )


def generate_promo_ppt(promo_label: str, data, ai_text: str) -> str:
    sections = [
        (f"促銷資料 ({promo_label})", _format_data(data)),
        ("AI 洞察", ai_text or "(暫無 AI 分析)"),
    ]
    return _build_ppt(
        "promo",
        f"促銷報告 {promo_label}",
        f"生成時間 {datetime.now().strftime('%Y-%m-%d %H:%M')}",
        sections,
    )