"""PPT 渲染服务 — 调用 python-pptx / insurance-deck 生成 PPT。"""
import os
import json
import uuid
import subprocess
import logging
from typing import Optional

logger = logging.getLogger(__name__)

# 默认 Python 路径
DEFAULT_PYTHON = "python"


def _resolve_python() -> str:
    """查找可用的 Python 解释器。

    优先使用虚拟环境中的 Python，然后是系统 Python。
    """
    import shutil
    import sys

    # 优先使用当前运行的 Python 解释器
    current_python = sys.executable
    if current_python and os.path.exists(current_python):
        return current_python

    # 查找虚拟环境中的 Python
    venv_python = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(__file__))), ".venv", "bin", "python")
    if os.path.exists(venv_python):
        return venv_python

    # 查找系统 Python
    for candidate in ["python3.12", "python3.11", "python3", "python"]:
        path = shutil.which(candidate)
        if path:
            return path

    return DEFAULT_PYTHON


def _build_deck_contract(
    normalized_data: dict,
    company_info: dict = None,
    theme: str = "broker",
    template_config: dict = None,
    all_products: list = None,
) -> dict:
    """将归一化数据转换为 DeckContract 格式。"""
    theme_map = {
        "broker": "broker",
        "modern": "modern",
        "fresh": "fresh",
        "warm": "warm",
        "deepblue": "broker",
        "caramel": "caramel",
        "chinese": "chinese",
    }

    def _extract_product(data):
        return {
            "kind": data.get("kind", "savings"),
            "productName": data.get("productName", ""),
            "rawProductName": data.get("rawProductName", ""),
            "insured": data.get("insured", {}),
            "policy": data.get("policy", {}),
            "benefitRows": data.get("benefitRows", []),
            "withdrawalRows": data.get("withdrawalRows", []),
            "withdrawalProvenance": data.get("withdrawalProvenance", "missing"),
        }

    products = [_extract_product(normalized_data)]
    if all_products:
        for extra in all_products:
            if extra is not normalized_data:
                products.append(_extract_product(extra))

    # 公司信息（扩展：传递 companyIntro, companyHighlights 等用于公司介绍页）
    company = {
        "id": "",
        "displayName": "",
        "shortEn": "",
        "evidence": [],
        "companyIntro": "",
        "companyHighlights": [],
        "rating": "",
        "logoUrl": "",
    }
    if company_info:
        company.update(company_info)

    deck = {
        "id": f"deck_{uuid.uuid4().hex[:12]}",
        "generatedAt": __import__("datetime").datetime.now().isoformat(),
        "customer": {
            "name": normalized_data.get("insured", {}).get("name", "客户"),
            "age": normalized_data.get("insured", {}).get("age"),
            "gender": normalized_data.get("insured", {}).get("gender", ""),
        },
        "tenantId": "default",
        "stylePreset": theme_map.get(theme, "broker"),
        "quality": "standard",
        "outputFormat": "pptx",
        "outputStem": "insurance_plan",
        "products": products,
        "company": company,
        "templateConfig": template_config or {},
        "meta": normalized_data.get("source", {
            "pdfHash": "",
            "pdfPath": "",
            "parser": "llm-json",
            "extractedAt": __import__("datetime").datetime.now().isoformat(),
        }),
        "fidelity": {
            "passed": True,
            "issueCount": 0,
            "errors": 0,
            "warnings": 0,
        },
    }

    return deck


class PptRenderer:
    """PPT 渲染器。"""

    def __init__(self, work_dir: str = None):
        self.work_dir = work_dir or os.path.join(os.getcwd(), "ppt_work")
        os.makedirs(self.work_dir, exist_ok=True)

    def render_enhanced(
        self,
        normalized_data: dict,
        output_path: str,
        theme: str = "broker",
        company_id: str = None,
        company_info: dict = None,
        template_config: dict = None,
        all_products: list = None,
    ) -> dict:
        """增强渲染（使用 fast_pptx_renderer.py）。

        Args:
            normalized_data: 归一化后的计划数据
            output_path: 输出 PPTX 路径
            theme: 视觉主题
            company_id: 公司 ID
            company_info: 公司信息 dict

        Returns:
            {"ok": bool, "path": str, "slideCount": int}
        """
        try:
            # 准备工作目录
            session_dir = os.path.join(self.work_dir, uuid.uuid4().hex[:8])
            os.makedirs(session_dir, exist_ok=True)

            # 转换为 DeckContract 格式
            deck = _build_deck_contract(normalized_data, company_info, theme,
                                         template_config, all_products)

            # 写入 DeckContract JSON
            deck_path = os.path.join(session_dir, "deck.json")
            with open(deck_path, "w", encoding="utf-8") as f:
                json.dump(deck, f, ensure_ascii=False, indent=2)

            # 查找渲染脚本
            python = _resolve_python()
            script_dir = os.path.join(os.path.dirname(__file__), "scripts")
            render_script = os.path.join(script_dir, "fast_pptx_renderer.py")

            if os.path.exists(render_script):
                # 映射主题到渲染脚本支持的主题
                theme_map = {
                    "broker": "deepblue",
                    "modern": "deepblue",
                    "fresh": "deepblue",
                    "warm": "caramel",
                    "deepblue": "deepblue",
                    "caramel": "caramel",
                    "chinese": "chinese",
                }
                script_theme = theme_map.get(theme, "deepblue")

                # 调用 fast_pptx_renderer.py
                cmd = [
                    python, render_script,
                    "--deck-json", deck_path,
                    "--output", output_path,
                    "--theme", script_theme,
                ]
                result = subprocess.run(cmd, capture_output=True, text=True, timeout=120)

                if result.returncode == 0:
                    # 解析脚本输出
                    try:
                        script_result = json.loads(result.stdout.strip())
                        if script_result.get("ok"):
                            return {
                                "ok": True,
                                "path": output_path,
                                "slideCount": script_result.get("slides", 0),
                            }
                        else:
                            return {
                                "ok": False,
                                "path": "",
                                "slideCount": 0,
                                "error": script_result.get("error", "渲染脚本返回失败"),
                            }
                    except json.JSONDecodeError:
                        # 脚本输出不是 JSON，尝试统计幻灯片数
                        slide_count = self._count_slides(output_path)
                        return {"ok": True, "path": output_path, "slideCount": slide_count}
                else:
                    logger.error(f"渲染脚本失败: {result.stderr}")
                    return {"ok": False, "path": "", "slideCount": 0, "error": result.stderr}
            else:
                # 回退到基础渲染
                logger.warning(f"渲染脚本不存在: {render_script}，使用基础渲染")
                return self._render_basic(normalized_data, output_path, theme)

        except Exception as e:
            logger.error(f"渲染失败: {e}")
            return {"ok": False, "path": "", "slideCount": 0, "error": str(e)}

    def _render_basic(self, data: dict, output_path: str, theme: str) -> dict:
        """基础 python-pptx 渲染（无 insurance-deck 时的回退）。"""
        try:
            from pptx import Presentation
            from pptx.util import Inches, Pt, Emu
            from pptx.dml.color import RGBColor
            from pptx.enum.text import PP_ALIGN

            prs = Presentation()
            prs.slide_width = Inches(13.33)
            prs.slide_height = Inches(7.5)

            # 主题配色
            themes = {
                "broker": {"primary": "0A3C5F", "accent": "18898D", "gold": "C9A027"},
                "modern": {"primary": "1A1A2E", "accent": "1A73E8", "gold": "FFD700"},
                "fresh": {"primary": "2E7D32", "accent": "4CAF50", "gold": "8BC34A"},
                "warm": {"primary": "5D4037", "accent": "FF9800", "gold": "FFC107"},
            }
            colors = themes.get(theme, themes["broker"])

            def hex_to_rgb(hex_color: str) -> RGBColor:
                h = hex_color.lstrip("#")
                return RGBColor(int(h[0:2], 16), int(h[2:4], 16), int(h[4:6], 16))

            def add_text_box(slide, left, top, width, height, text, font_size=18, bold=False, color="FFFFFF", align=PP_ALIGN.LEFT):
                txBox = slide.shapes.add_textbox(Inches(left), Inches(top), Inches(width), Inches(height))
                tf = txBox.text_frame
                tf.word_wrap = True
                p = tf.paragraphs[0]
                p.text = text
                p.font.size = Pt(font_size)
                p.font.bold = bold
                p.font.color.rgb = hex_to_rgb(color)
                p.alignment = align
                return txBox

            # ─── 封面页 ─────────────────────────────────────
            slide = prs.slides.add_slide(prs.slide_layouts[6])  # 空白布局
            # 背景色
            background = slide.background
            fill = background.fill
            fill.solid()
            fill.fore_color.rgb = hex_to_rgb(colors["primary"])

            product_name = data.get("productName", "保险计划书")
            insured = data.get("insured", {})
            customer_name = insured.get("name", "客户")

            add_text_box(slide, 0.8, 1.5, 11.7, 1.0, customer_name, font_size=42, bold=True)
            add_text_box(slide, 0.8, 2.5, 11.7, 0.6, "财富增值与传承方案", font_size=24, color="90CAF9")
            add_text_box(slide, 0.8, 3.5, 11.7, 0.5, product_name, font_size=16, color="8899AA")

            # 关键指标卡片
            policy = data.get("policy", {})
            annual_premium = policy.get("annualPremium", 0)
            pay_years = policy.get("payYears", 0)
            benefit_rows = data.get("benefitRows", [])

            total_premium = annual_premium * pay_years
            multiple = "-"
            final_value = 0
            if benefit_rows:
                last_row = benefit_rows[-1]
                final_value = last_row.get("totalSurrenderValue", 0)
                if total_premium > 0:
                    multiple = f"{final_value / total_premium:.1f}x"

            metrics = [
                ("年缴保费", f"${annual_premium:,.0f}"),
                ("缴费年期", f"{pay_years}年"),
                ("总投入", f"${total_premium:,.0f}"),
                ("期末倍数", multiple),
            ]
            for i, (label, value) in enumerate(metrics):
                x = 0.8 + i * 3.0
                add_text_box(slide, x, 4.5, 2.5, 0.4, label, font_size=12, color="8899AA")
                add_text_box(slide, x, 4.9, 2.5, 0.5, value, font_size=24, bold=True, color=colors["accent"])

            # ─── 数据总览页 ─────────────────────────────────
            slide = prs.slides.add_slide(prs.slide_layouts[6])
            background = slide.background
            fill = background.fill
            fill.solid()
            fill.fore_color.rgb = hex_to_rgb("FFFFFF")

            add_text_box(slide, 0.5, 0.3, 12.3, 0.6, "保单数据总览", font_size=28, bold=True, color=colors["primary"])

            # 基本信息表
            info_items = [
                ("产品名称", product_name),
                ("受保人", f"{customer_name} ({insured.get('age', '')}岁)"),
                ("保单货币", policy.get("currency", "USD")),
                ("年缴保费", f"${annual_premium:,.0f}"),
                ("缴费年期", f"{pay_years}年"),
                ("保障期间", policy.get("coveragePeriod", "")),
            ]
            for i, (label, value) in enumerate(info_items):
                y = 1.2 + i * 0.5
                add_text_box(slide, 1.0, y, 3.0, 0.4, label, font_size=14, color="666666")
                add_text_box(slide, 4.0, y, 8.0, 0.4, str(value), font_size=14, bold=True, color="333333")

            # ─── 利益演示页 ─────────────────────────────────
            if benefit_rows:
                slide = prs.slides.add_slide(prs.slide_layouts[6])
                background = slide.background
                fill = background.fill
                fill.solid()
                fill.fore_color.rgb = hex_to_rgb("FFFFFF")

                add_text_box(slide, 0.5, 0.3, 12.3, 0.6, "逐年利益演示", font_size=28, bold=True, color=colors["primary"])

                # 表头
                headers = ["保单年度", "年龄", "已缴保费", "保证现金价值", "归原红利", "终期分红", "退保发还总额"]
                col_widths = [1.5, 1.2, 1.8, 2.0, 1.8, 1.8, 2.2]
                x = 0.5
                for header, width in zip(headers, col_widths):
                    add_text_box(slide, x, 1.1, width, 0.4, header, font_size=11, bold=True, color=colors["primary"])
                    x += width

                # 数据行（最多显示20行）
                display_rows = benefit_rows[:20]
                for row_idx, row in enumerate(display_rows):
                    y = 1.5 + row_idx * 0.35
                    values = [
                        str(row.get("policyYear", "")),
                        str(row.get("age", "")),
                        f"${row.get('totalPremiumPaid', 0):,.0f}",
                        f"${row.get('guaranteedCashValue', 0):,.0f}",
                        f"${row.get('reversionaryBonus', 0):,.0f}",
                        f"${row.get('terminalDividend', 0):,.0f}",
                        f"${row.get('totalSurrenderValue', 0):,.0f}",
                    ]
                    x = 0.5
                    for value, width in zip(values, col_widths):
                        add_text_box(slide, x, y, width, 0.3, value, font_size=10, color="333333")
                        x += width

            # ─── 总结页 ─────────────────────────────────────
            slide = prs.slides.add_slide(prs.slide_layouts[6])
            background = slide.background
            fill = background.fill
            fill.solid()
            fill.fore_color.rgb = hex_to_rgb(colors["primary"])

            add_text_box(slide, 0.8, 2.0, 11.7, 1.0, "方案总结", font_size=36, bold=True, align=PP_ALIGN.CENTER)
            add_text_box(slide, 0.8, 3.2, 11.7, 0.6, f"总投入 ${total_premium:,.0f} → 期末价值 ${final_value:,.0f}", font_size=24, color="90CAF9", align=PP_ALIGN.CENTER)
            add_text_box(slide, 0.8, 4.0, 11.7, 0.5, f"倍数增长 {multiple}", font_size=28, bold=True, color=colors["gold"], align=PP_ALIGN.CENTER)

            prs.save(output_path)
            slide_count = len(prs.slides)
            return {"ok": True, "path": output_path, "slideCount": slide_count}

        except ImportError:
            return {"ok": False, "path": "", "slideCount": 0, "error": "python-pptx 未安装"}

    def _count_slides(self, pptx_path: str) -> int:
        """统计 PPTX 幻灯片数量。"""
        try:
            from pptx import Presentation
            prs = Presentation(pptx_path)
            return len(prs.slides)
        except Exception:
            return 0

    def generate_previews(self, pptx_path: str, output_dir: str) -> dict:
        """生成幻灯片预览图（需要 LibreOffice）。"""
        os.makedirs(output_dir, exist_ok=True)
        try:
            soffice = os.environ.get("SOFFICE_BIN", "/usr/bin/soffice")
            cmd = [
                soffice, "--headless", "--convert-to", "pdf",
                "--outdir", output_dir, pptx_path,
            ]
            subprocess.run(cmd, capture_output=True, timeout=60)
            # 预览图生成需要额外的 PDF→PNG 转换
            return {"ok": True, "previewPaths": []}
        except Exception as e:
            logger.warning(f"预览生成失败: {e}")
            return {"ok": False, "previewPaths": [], "error": str(e)}