"""产品推荐路由（A3）

POST /recommend/generate       生成推荐方案
GET  /recommend/generate/{id}  查询生成状态
GET  /recommend/list           推荐历史列表
POST /recommend/{id}/export    导出方案
POST /recommend/{id}/share     生成分享链接
"""
from flask import Blueprint, request, jsonify, send_file
from insurance.recommend.service import RecommendService
from insurance.middleware.auth_middleware import jwt_required

recommend_bp = Blueprint("recommend", __name__)
recommend_service = RecommendService()


@recommend_bp.route("/generate", methods=["POST"])
@jwt_required
def generate():
    """生成推荐方案（异步任务）。

    参数校验按需求文档 §13.3：
    - customer.age: 1-150 整数
    - customer.gender: male/female
    - customer.health_status: 健康/有既往病史/慢性病/重大疾病史
    - customer.occupation: 1-64 字符
    - customer.monthly_budget: >=1
    - insurance_types: 1-10 项枚举
    - coverage_amount: >=10000
    - coverage_period: 枚举
    """
    data = request.get_json()
    if not data:
        return jsonify({"code": 1001, "message": "请求体不能为空", "data": None}), 400

    user_id = request.user_id

    # 参数校验
    errors = []
    customer = data.get("customer", {})
    if not customer:
        errors.append("customer 不能为空")

    # 年龄校验
    age = customer.get("age")
    if age is None:
        errors.append("customer.age 不能为空")
    elif not isinstance(age, int) or not (1 <= age <= 150):
        errors.append("customer.age 必须是 1-150 的整数")

    # 性别校验
    gender = customer.get("gender", "")
    if gender not in ("male", "female"):
        errors.append("customer.gender 必须是 male 或 female")

    # 健康状况校验
    health_status = customer.get("health_status", "")
    valid_health = ["健康", "有既往病史", "慢性病", "重大疾病史"]
    if health_status and health_status not in valid_health:
        errors.append(f"customer.health_status 必须是 {'/'.join(valid_health)} 之一")

    # 职业校验
    occupation = customer.get("occupation", "")
    if not occupation or len(occupation) > 64:
        errors.append("customer.occupation 不能为空且不超过64字符")

    # 月预算校验
    monthly_budget = customer.get("monthly_budget")
    if monthly_budget is None or not isinstance(monthly_budget, (int, float)) or monthly_budget < 1:
        errors.append("customer.monthly_budget 必须 >= 1")

    # 险种校验
    insurance_types = data.get("insurance_types", [])
    valid_types = ["重疾险", "寿险", "医疗险", "意外险", "年金险", "储蓄险"]
    if not insurance_types or not isinstance(insurance_types, list):
        errors.append("insurance_types 不能为空")
    elif len(insurance_types) > 10:
        errors.append("insurance_types 最多选择10项")
    else:
        for t in insurance_types:
            if t not in valid_types:
                errors.append(f"无效的险种: {t}")
                break

    # 保额校验
    coverage_amount = data.get("coverage_amount")
    if coverage_amount is None or not isinstance(coverage_amount, (int, float)) or coverage_amount < 10000:
        errors.append("coverage_amount 必须 >= 10000")

    # 保障期限校验
    coverage_period = data.get("coverage_period", "")
    valid_periods = ["终身", "10年", "20年", "30年", "至60岁", "至65岁", "至70岁", "至80岁"]
    if not coverage_period:
        errors.append("coverage_period 不能为空")
    elif coverage_period not in valid_periods:
        errors.append(f"coverage_period 必须是 {'/'.join(valid_periods)} 之一")

    if errors:
        return jsonify({"code": 1001, "message": "; ".join(errors), "data": None}), 400

    result = recommend_service.generate(user_id, data)
    return jsonify(result)


@recommend_bp.route("/generate/<task_id>", methods=["GET"])
@jwt_required
def get_status(task_id):
    """查询生成任务状态。"""
    result = recommend_service.get_status(task_id)
    return jsonify(result)


@recommend_bp.route("/list", methods=["GET"])
@jwt_required
def list_proposals():
    """推荐历史列表（分页 + 筛选）。"""
    params = {
        "page": request.args.get("page", 1, type=int),
        "page_size": request.args.get("page_size", 20, type=int),
        "customer_name": request.args.get("customerName", ""),
        "insurance_type": request.args.get("insuranceType", ""),
    }
    user_id = request.user_id
    result = recommend_service.list_proposals(user_id, params)
    return jsonify(result)


@recommend_bp.route("/<proposal_id>", methods=["DELETE"])
@jwt_required
def delete_proposal(proposal_id):
    """删除推荐方案。"""
    result = recommend_service.delete(proposal_id)
    return jsonify(result)


@recommend_bp.route("/<proposal_id>/export", methods=["POST"])
@jwt_required
def export_proposal(proposal_id):
    """导出方案为 PDF/Word。"""
    data = request.get_json()
    fmt = data.get("format", "pdf")
    if fmt not in ("pdf", "docx"):
        return jsonify({"code": 1001, "message": "不支持的导出格式，仅支持 pdf/docx", "data": None}), 400

    from insurance.recommend.export_service import export_word, export_pdf

    if fmt == "docx":
        buf, error = export_word(proposal_id)
    else:
        buf, error = export_pdf(proposal_id)

    if error:
        return jsonify({"code": 1005, "message": error, "data": None}), 404

    mimetype = "application/pdf" if fmt == "pdf" else "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
    return send_file(
        buf,
        mimetype=mimetype,
        as_attachment=True,
        download_name=f"recommendation_{proposal_id}.{fmt}",
    )


@recommend_bp.route("/<proposal_id>/share", methods=["POST"])
@jwt_required
def share(proposal_id):
    """生成有时效的分享链接。"""
    data = request.get_json()
    expire_hours = data.get("expire_hours", 72)
    result = recommend_service.share(proposal_id, expire_hours)
    return jsonify(result)