"""PPT 生成模块 Blueprint 路由。"""
import os
import uuid
import json
import logging
from flask import Blueprint, request, jsonify, send_file
from insurance.middleware.auth_middleware import jwt_required
from insurance.utils.response import success, error, ErrorCode

logger = logging.getLogger(__name__)

ppt_bp = Blueprint("ppt", __name__)


def _get_session(session_id: str, user_id: str):
    """获取会话记录。"""
    from insurance.db.compat import db
    from insurance.models.ppt_session import PptSession
    session = PptSession.query.filter_by(id=session_id).first()
    if not session:
        return None
    if session.user_id != user_id:
        return None
    return session


def _save_session(session):
    """保存会话记录。"""
    from insurance.db.compat import db
    db.session.add(session)
    db.session.commit()


# ─── 健康检查 ─────────────────────────────────────────────

@ppt_bp.route("/health", methods=["GET"])
def health():
    return success({"status": "ok"})


# ─── 渲染选项 ─────────────────────────────────────────────

@ppt_bp.route("/render-options", methods=["GET"])
def render_options():
    """获取可用的公司和模板风格列表。"""
    from insurance.models.ppt_config import PptCompany, PptProduct, PptTemplate
    companies = PptCompany.query.filter_by(status=1).order_by(
        PptCompany.sort_order.asc(), PptCompany.id.asc()
    ).all()
    products = PptProduct.query.filter_by(status=1).order_by(
        PptProduct.sort_order.asc(), PptProduct.id.asc()
    ).all()
    templates = PptTemplate.query.filter_by(status=1).order_by(
        PptTemplate.plan_type.asc(), PptTemplate.id.asc()
    ).all()
    return success({
        "companies": [c.to_dict() for c in companies],
        "products": [p.to_dict() for p in products],
        "templates": [t.to_dict() for t in templates],
    })


# ─── 上传 PDF ─────────────────────────────────────────────

@ppt_bp.route("/upload", methods=["POST"])
@jwt_required
def upload_pdfs():
    """上传 PDF 文件并创建会话。"""
    user_id = str(getattr(request, "user_id", "guest"))
    files = request.files.getlist("files")
    types = request.form.getlist("types")
    companies = request.form.getlist("companies")
    products = request.form.getlist("products")

    if not files:
        return error(ErrorCode.PARAM_ERROR, "未上传文件")

    # 创建上传目录（使用持久化存储）
    from insurance.config import get_storage_root
    upload_dir = os.path.join(get_storage_root(), "uploads", "ppt", user_id)
    os.makedirs(upload_dir, exist_ok=True)

    file_records = []
    validation_errors = []
    from insurance.utils.security import validate_pdf_upload
    for i, f in enumerate(files):
        if not f.filename or not f.filename.lower().endswith(".pdf"):
            continue
        plan_type = types[i] if i < len(types) else "savings"
        company_id = companies[i] if i < len(companies) else ""
        product_id = products[i] if i < len(products) else ""
        from insurance.models.ppt_config import PptCompany, PptProduct
        company = (
            PptCompany.query.filter_by(id=company_id, status=1).first()
            if company_id else None
        )
        product = (
            PptProduct.query.filter_by(id=product_id, status=1).first()
            if product_id else None
        )
        if company_id and not company:
            validation_errors.append(f"{f.filename}: 所选保司不存在或已停用")
            continue
        if product_id and (
            not product
            or product.plan_type != plan_type
            or (company_id and product.company_id != company_id)
        ):
            validation_errors.append(f"{f.filename}: 所选产品与险种或保司不匹配")
            continue
        if product and not company_id:
            company_id = product.company_id
        # 文件安全校验（SEC-P1-01）
        is_valid, err_msg = validate_pdf_upload(f)
        if not is_valid:
            validation_errors.append(f"{f.filename}: {err_msg}")
            continue
        # 保存文件
        filename = f"{uuid.uuid4().hex[:8]}_{f.filename}"
        filepath = os.path.join(upload_dir, filename)
        f.save(filepath)

        file_records.append({
            "path": filepath,
            "name": f.filename,
            "type": plan_type,
            "companyId": company_id,
            "productId": product_id,
        })

    if not file_records:
        if validation_errors:
            return error(ErrorCode.FILE_FORMAT_ERROR, "; ".join(validation_errors))
        return error(ErrorCode.FILE_FORMAT_ERROR, "无有效 PDF 文件")

    # 创建会话
    session_id = uuid.uuid4().hex
    from insurance.models.ppt_session import PptSession
    session = PptSession(
        id=session_id,
        user_id=user_id,
        status="created",
        files_json=json.dumps(file_records, ensure_ascii=False),
    )
    _save_session(session)

    return success({
        "sessionId": session_id,
        "files": [f["name"] for f in file_records],
    })


# ─── 解析 PDF ─────────────────────────────────────────────

@ppt_bp.route("/parse/<session_id>", methods=["POST"])
@jwt_required
def parse_session(session_id):
    """触发 AI 解析 PDF（异步任务）。"""
    user_id = str(getattr(request, "user_id", "guest"))
    session = _get_session(session_id, user_id)
    if not session:
        return error(ErrorCode.NOT_FOUND, "会话不存在")

    files = json.loads(session.files_json) if session.files_json else []
    if not files:
        return error(ErrorCode.PARAM_ERROR, "没有可解析的 PDF 文件")

    if session.status == "parsing":
        return success(_build_parse_status(session), "解析任务正在进行")

    # 创建异步任务
    from insurance.generation import task_service
    session.status = "parsing"
    session.parse_progress = 0
    session.parse_message = "解析任务已提交"
    session.parse_error = None
    session.extractions_json = json.dumps([], ensure_ascii=False)
    _save_session(session)

    result = task_service.create_task(
        user_id=user_id,
        artifact_type="ppt",
        operation="parse",
        workspace_id=session_id,
        title=session.title or f"PPT {session_id[:8]}",
        input_snapshot={"files": files},
        idempotency_key=f"ppt_parse_{session_id}",
    )

    if result.get("code") == 0:
        session.latest_task_id = result["data"]["id"]
        _save_session(session)
        message = "解析任务已启动"
    else:
        message = result.get("message", "解析任务提交失败")

    return success({
        "sessionId": session_id,
        "status": session.status,
        "progress": session.parse_progress or 0,
        "message": message,
        "taskId": result.get("data", {}).get("id") if result.get("code") == 0 else None,
    })


@ppt_bp.route("/parse/<session_id>/status", methods=["GET"])
@jwt_required
def parse_status(session_id):
    """获取 AI 解析进度。"""
    user_id = str(getattr(request, "user_id", "guest"))
    session = _get_session(session_id, user_id)
    if not session:
        return error(ErrorCode.NOT_FOUND, "会话不存在")
    return success(_build_parse_status(session))


def _build_parse_status(session):
    extractions = json.loads(session.extractions_json) if session.extractions_json else []
    return {
        "sessionId": session.id,
        "status": session.status,
        "progress": session.parse_progress or 0,
        "message": session.parse_message or "",
        "error": session.parse_error,
        "extractions": [{
            "pdfName": e.get("pdfName", ""),
            "planType": e.get("planType", ""),
            "status": e.get("status", ""),
            "productName": e.get("productName", ""),
            "yearCount": e.get("yearCount", 0),
            "error": e.get("error"),
        } for e in extractions],
    }


def _reassess_extraction(ext: dict):
    from insurance.ppt.extraction import assess_extraction_payload, infer_plan_type

    data = ext.get("data")
    if not data:
        return

    plan_type = infer_plan_type(data)
    status, extraction_error = assess_extraction_payload(data, plan_type)
    data["product_type"] = plan_type
    ext["planType"] = plan_type
    ext["status"] = status
    ext["productName"] = (data.get("product_name") or "").strip() or "unknown"
    ext["error"] = extraction_error or None
    rows = data.get("benefit_illustration") or data.get("benefitRows") or []
    ext["yearCount"] = len(rows) if isinstance(rows, list) else 0


# ─── 获取会话状态 ─────────────────────────────────────────

@ppt_bp.route("/session/<session_id>", methods=["GET"])
@jwt_required
def get_session(session_id):
    """获取完整会话状态。"""
    user_id = str(getattr(request, "user_id", "guest"))
    session = _get_session(session_id, user_id)
    if not session:
        return error(ErrorCode.NOT_FOUND, "会话不存在")

    return success(session.to_dict())


# ─── 对话 ─────────────────────────────────────────────────

@ppt_bp.route("/chat/<session_id>", methods=["POST"])
@jwt_required
def chat(session_id):
    """AI 保险顾问对话。"""
    user_id = str(getattr(request, "user_id", "guest"))
    session = _get_session(session_id, user_id)
    if not session:
        return error(ErrorCode.NOT_FOUND, "会话不存在")

    data = request.get_json(silent=True) or {}
    message = data.get("message", "").strip()
    if not message:
        return error(ErrorCode.PARAM_ERROR, "消息不能为空")

    import asyncio
    from insurance.ppt.llm_client import llm_client

    # 构建上下文
    extractions = json.loads(session.extractions_json) if session.extractions_json else []
    context_parts = []
    for ext in extractions:
        if ext.get("data"):
            context_parts.append(f"产品: {ext['productName']}, 类型: {ext['planType']}")
            data_inner = ext["data"]
            policy = data_inner.get("policy", {})
            context_parts.append(f"年缴保费: {policy.get('annual_premium', 'N/A')}")
            context_parts.append(f"缴费年期: {policy.get('premium_payment_period', 'N/A')}")

    system_prompt = (
        "你是一位资深的香港保险顾问，擅长为保险经纪人分析保险计划书。"
        "请基于以下保单数据，用温暖、专业、数据驱动的方式回答问题。\n\n"
        f"保单数据：\n{''.join(context_parts)}"
    )

    try:
        response = asyncio.run(llm_client.chat(message, system_prompt))
        reply = response.content
    except Exception as e:
        reply = f"抱歉，暂时无法回答。错误信息：{e}"

    # 更新对话历史
    history = json.loads(session.chat_history_json) if session.chat_history_json else []
    history.append({"role": "user", "content": message})
    history.append({"role": "assistant", "content": reply})
    # 保留最近 20 条
    history = history[-20:]
    session.chat_history_json = json.dumps(history, ensure_ascii=False)
    _save_session(session)

    return success({
        "sessionId": session_id,
        "message": reply,
        "history": history,
    })


# ─── 生成 PPT ─────────────────────────────────────────────

@ppt_bp.route("/generate/<session_id>", methods=["POST"])
@jwt_required
def generate_ppt(session_id):
    """生成 PPT（异步任务）。

    创建任务后立即返回 202，前端通过任务接口轮询状态。
    """
    user_id = str(getattr(request, "user_id", "guest"))
    session = _get_session(session_id, user_id)
    if not session:
        return error(ErrorCode.NOT_FOUND, "会话不存在")

    data = request.get_json(silent=True) or {}
    theme = data.get("theme") or data.get("style") or "broker"
    company_id = data.get("companyId", "")
    template_id = data.get("templateId", "")
    use_masked_data = bool(data.get("useMaskedData"))
    files = json.loads(session.files_json) if session.files_json else []
    product_ids = [item.get("productId") for item in files if item.get("productId")]
    if not company_id:
        company_id = next(
            (item.get("companyId") for item in files if item.get("companyId")), ""
        )
    if company_id:
        from insurance.models.ppt_config import PptCompany
        if not PptCompany.query.filter_by(id=company_id, status=1).first():
            return error(ErrorCode.PARAM_ERROR, "所选保司不存在或已停用")

    if template_id:
        from insurance.models.ppt_config import PptTemplate
        template = PptTemplate.query.filter_by(id=template_id, status=1).first()
        if not template:
            return error(ErrorCode.PARAM_ERROR, "所选 PPT 模板不存在或已停用")
        template_data = template.to_dict()
        primary_plan_type = next(
            (item.get("type") for item in files if item.get("type")), ""
        )
        if primary_plan_type and template.plan_type != primary_plan_type:
            return error(ErrorCode.PARAM_ERROR, "所选 PPT 模板不适用于当前险种")
        applicable_companies = template_data.get("applicableCompanyIds") or []
        applicable_products = template_data.get("applicableProductIds") or []
        if applicable_companies and company_id not in applicable_companies:
            return error(ErrorCode.PARAM_ERROR, "所选 PPT 模板不适用于当前保司")
        if applicable_products and not set(product_ids).intersection(applicable_products):
            return error(ErrorCode.PARAM_ERROR, "所选 PPT 模板不适用于当前产品")
        theme = template.style_preset

    extractions = json.loads(session.extractions_json) if session.extractions_json else []
    if not extractions:
        return error(ErrorCode.PARAM_ERROR, "无解析数据")

    # 快速校验：确保有可生成的数据
    has_valid = any(
        e.get("status") in ("success", "partial") and e.get("data")
        for e in extractions
    )
    if not has_valid:
        return error(ErrorCode.PARAM_ERROR, "无有效提取数据")

    # 更新会话草稿选项
    import uuid
    session.draft_options_json = json.dumps({
        "theme": theme, "templateId": template_id,
        "companyId": company_id, "productIds": product_ids,
        "useMaskedData": use_masked_data,
    }, ensure_ascii=False)
    session.draft_revision = (session.draft_revision or 1) + 1
    _save_session(session)

    # 创建异步任务
    from insurance.generation import task_service
    result = task_service.create_task(
        user_id=user_id,
        artifact_type="ppt",
        operation="generate",
        workspace_id=session_id,
        title=session.title or f"PPT {session_id[:8]}",
        input_snapshot={
            "theme": theme,
            "templateId": template_id,
            "companyId": company_id,
            "productIds": product_ids,
            "useMaskedData": use_masked_data,
        },
        idempotency_key=f"ppt_gen_{session_id}_{session.draft_revision}",
    )

    if result.get("code") != 0:
        return error(ErrorCode.PARAM_ERROR, result.get("message", "创建任务失败"))

    task_data = result["data"]
    session.latest_task_id = task_data["id"]
    _save_session(session)

    from flask import jsonify, make_response
    resp = make_response(jsonify({
        "code": 0,
        "data": {
            "taskId": task_data["id"],
            "status": "queued",
            "sessionId": session_id,
            "pollUrl": f"/insurance/workspace/tasks/{task_data['id']}",
        },
    }))
    resp.status_code = 202
    return resp


# ─── 下载 PPT ─────────────────────────────────────────────

@ppt_bp.route("/download/<session_id>", methods=["GET"])
@jwt_required
def download_ppt(session_id):
    """下载生成的 PPT。"""
    user_id = str(getattr(request, "user_id", "guest"))
    session = _get_session(session_id, user_id)
    if not session:
        return error(ErrorCode.NOT_FOUND, "会话不存在")

    if not session.ppt_path or not os.path.exists(session.ppt_path):
        return error(ErrorCode.NOT_FOUND, "PPT 文件不存在")

    # 记录下载历史
    try:
        _record_history(
            user_id=user_id,
            action_type="download",
            session_id=session_id,
            file_url=session.ppt_path,
        )
    except Exception:
        logger.warning("记录下载历史失败", exc_info=True)

    return send_file(
        session.ppt_path,
        as_attachment=True,
        download_name=f"{session_id}.pptx",
        mimetype="application/vnd.openxmlformats-officedocument.presentationml.presentation",
    )


# ─── 验证提取数据 ─────────────────────────────────────────

@ppt_bp.route("/validate/<session_id>", methods=["GET"])
@jwt_required
def validate_extraction(session_id):
    """验证提取数据完整性。"""
    user_id = str(getattr(request, "user_id", "guest"))
    session = _get_session(session_id, user_id)
    if not session:
        return error(ErrorCode.NOT_FOUND, "会话不存在")

    extractions = json.loads(session.extractions_json) if session.extractions_json else []
    all_issues = []

    from insurance.ppt.normalizer import normalize_savings_plan, normalize_ci_plan, normalize_iul_plan
    from insurance.ppt.validator import validate_formal_savings_plan, validate_formal_ci_plan, validate_formal_iul_plan

    for ext in extractions:
        if ext.get("status") not in ("success", "partial") or not ext.get("data"):
            continue
        data = ext["data"]
        plan_type = (ext.get("planType") or data.get("product_type") or "savings").lower()
        pdf_path = ext.get("pdfPath")
        try:
            if plan_type == "ci":
                normalized = normalize_ci_plan(data, pdf_path)
                issues = validate_formal_ci_plan(normalized)
            elif plan_type == "iul":
                normalized = normalize_iul_plan(data, pdf_path)
                issues = validate_formal_iul_plan(normalized)
            else:
                normalized = normalize_savings_plan(data, pdf_path)
                issues = validate_formal_savings_plan(normalized)
            all_issues.extend([{"field": i.code, "severity": i.level, "message": i.message} for i in issues])
        except Exception as e:
            all_issues.append({"field": "general", "severity": "error", "message": str(e)})

    error_count = sum(1 for i in all_issues if i["severity"] == "error")
    warn_count = sum(1 for i in all_issues if i["severity"] == "warn")

    return success({
        "sessionId": session_id,
        "validated": error_count == 0,
        "errorCount": error_count,
        "warnCount": warn_count,
        "issues": all_issues,
    })


# ─── 更新提取数据 ─────────────────────────────────────────

@ppt_bp.route("/session/<session_id>/extractions", methods=["PUT"])
@jwt_required
def update_extractions(session_id):
    """保存用户修改后的提取数据。"""
    user_id = str(getattr(request, "user_id", "guest"))
    session = _get_session(session_id, user_id)
    if not session:
        return error(ErrorCode.NOT_FOUND, "会话不存在")

    data = request.get_json(silent=True) or {}
    extractions = data.get("extractions")
    if not isinstance(extractions, list):
        return error(ErrorCode.PARAM_ERROR, "extractions 必须是数组")

    # 合并更新：只更新 data 字段，保留 pdfPath/status 等元信息
    existing = json.loads(session.extractions_json) if session.extractions_json else []
    existing_map = {e["pdfName"]: e for e in existing}

    for ext in extractions:
        pdf_name = ext.get("pdfName")
        if not pdf_name or pdf_name not in existing_map:
            continue
        # 更新数据字段
        if "data" in ext:
            existing_map[pdf_name]["data"] = ext["data"]
        if "productName" in ext:
            existing_map[pdf_name]["productName"] = ext["productName"]
        if "planType" in ext:
            existing_map[pdf_name]["planType"] = ext["planType"]
        _reassess_extraction(existing_map[pdf_name])

    updated = list(existing_map.values())
    session.extractions_json = json.dumps(updated, ensure_ascii=False)
    session.status = "parsed"  # 回到 parsed 状态，需要重新生成
    _save_session(session)

    return success({
        "sessionId": session_id,
        "status": "updated",
        "extractions": [{
            "pdfName": e["pdfName"],
            "planType": e["planType"],
            "status": e["status"],
            "productName": e["productName"],
            "yearCount": e["yearCount"],
        } for e in updated],
    })


# ─── 公司知识库匹配 ───────────────────────────────────────

@ppt_bp.route("/company-kb/match", methods=["POST"])
@jwt_required
def match_company():
    """匹配公司知识库。"""
    data = request.get_json(silent=True) or {}
    product_name = data.get("productName")
    company_hint = data.get("companyHint")
    forced_company_id = data.get("companyId")

    from insurance.models.ppt_config import PptCompany, PptProduct
    from insurance.ppt.knowledge import match_company_knowledge

    companies = [c.to_dict() for c in PptCompany.query.all()]
    products = [p.to_dict() for p in PptProduct.query.all()]

    result = match_company_knowledge(
        product_name=product_name,
        company_hint=company_hint,
        forced_company_id=forced_company_id,
        companies=companies,
        products=products,
    )

    return success(result)


# ─── 历史记录 ─────────────────────────────────────────────

def _record_history(user_id, action_type, session_id=None, company_id=None,
                    product_id=None, template_id=None, content_snapshot=None,
                    file_url=None):
    """写入历史记录（内部函数）。"""
    from insurance.db.compat import db
    from insurance.models.ppt_history import PptHistory
    from flask import request as req
    record = PptHistory(
        user_id=user_id,
        session_id=session_id,
        action_type=action_type,
        company_id=company_id,
        product_id=product_id,
        template_id=template_id,
        content_snapshot=json.dumps(content_snapshot, ensure_ascii=False) if content_snapshot else None,
        file_url=file_url,
        ip=req.remote_addr,
        user_agent=req.headers.get("User-Agent", "")[:500],
    )
    db.session.add(record)
    db.session.commit()


@ppt_bp.route("/history", methods=["GET"])
@jwt_required
def list_history():
    """当前用户的历史记录列表。"""
    from insurance.db.compat import db
    from insurance.models.ppt_history import PptHistory

    user_id = str(getattr(request, "user_id", "guest"))
    page = max(1, request.args.get("page", 1, type=int))
    page_size = min(100, max(1, request.args.get("page_size", 20, type=int)))
    company_id = request.args.get("company_id", "")
    action_type = request.args.get("action_type", "")

    query = db.session.query(PptHistory).filter(PptHistory.user_id == user_id)
    if company_id:
        query = query.filter(PptHistory.company_id == company_id)
    if action_type:
        query = query.filter(PptHistory.action_type == action_type)
    query = query.order_by(PptHistory.created_at.desc())
    total = query.count()
    items = query.offset((page - 1) * page_size).limit(page_size).all()

    return success({
        "total": total,
        "items": [h.to_dict() for h in items],
    })


@ppt_bp.route("/history/<int:history_id>", methods=["GET"])
@jwt_required
def get_history(history_id):
    """单条历史详情。"""
    from insurance.models.ppt_history import PptHistory
    user_id = str(getattr(request, "user_id", "guest"))
    record = PptHistory.query.get(history_id)
    if not record or record.user_id != user_id:
        return error(ErrorCode.NOT_FOUND, "记录不存在")
    return success(record.to_dict())


@ppt_bp.route("/history/<int:history_id>/re-download", methods=["GET", "POST"])
@jwt_required
def re_download(history_id):
    """重新下载历史文件。"""
    from insurance.models.ppt_history import PptHistory
    user_id = str(getattr(request, "user_id", "guest"))
    record = PptHistory.query.get(history_id)
    if not record or record.user_id != user_id:
        return error(ErrorCode.NOT_FOUND, "记录不存在")
    if not record.file_url or not os.path.exists(record.file_url):
        return error(ErrorCode.NOT_FOUND, "文件不存在")
    return send_file(record.file_url, as_attachment=True)