"""海报功能路由。"""
import os
from flask import Blueprint, request, jsonify, send_file
from insurance.middleware.auth_middleware import jwt_required
from insurance.utils.response import success, error, ErrorCode

poster_bp = Blueprint("poster", __name__)
poster_service = None


def _get_service():
    global poster_service
    if poster_service is None:
        from insurance.poster.service import PosterService
        poster_service = PosterService()
    return poster_service


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

@poster_bp.route("/health", methods=["GET"])
def health():
    """海报模块健康检查：reviewed 产品、模板、文案模板、模型配置。"""
    from flask import jsonify
    checks = {}
    critical_missing = []

    try:
        from insurance.models.ppt_config import PptProduct
        count = PptProduct.query.filter(
            PptProduct.manual_parse_status == "reviewed",
            PptProduct.status == 1,
        ).count()
        checks["reviewed_products"] = count
        if count == 0:
            critical_missing.append("reviewed_products")
    except Exception as e:
        checks["reviewed_products"] = f"error: {e}"
        critical_missing.append("reviewed_products")

    try:
        from insurance.models.poster_template_model import PosterTemplate
        count = PosterTemplate.query.filter_by(status=1).count()
        checks["poster_templates"] = count
        if count == 0:
            critical_missing.append("poster_templates")
    except Exception as e:
        checks["poster_templates"] = f"error: {e}"
        critical_missing.append("poster_templates")

    try:
        from insurance.models.poster_copy_template import PosterCopyTemplate
        count = PosterCopyTemplate.query.filter_by(status=1).count()
        checks["copy_templates"] = count
        if count == 0:
            critical_missing.append("copy_templates")
    except Exception as e:
        checks["copy_templates"] = f"error: {e}"
        critical_missing.append("copy_templates")

    try:
        from insurance.models.system_setting import SystemSetting
        keys = ["poster_image_provider", "poster_image_api_key"]
        settings = {s.key: s.value for s in SystemSetting.query.filter(SystemSetting.key.in_(keys)).all()}
        checks["image_model_configured"] = bool(settings.get("poster_image_api_key"))
    except Exception as e:
        checks["image_model_configured"] = f"error: {e}"

    if critical_missing:
        checks["status"] = "degraded"
        checks["missing"] = critical_missing
        return jsonify(checks), 503

    checks["status"] = "ok"
    return success(checks)


# ─── 产品列表 ─────────────────────────────────────────────

@poster_bp.route("/products", methods=["GET"])
@jwt_required
def list_products():
    """获取已 reviewed 的产品列表。"""
    return jsonify(_get_service().get_reviewed_products())


# ─── 计划书上传 ───────────────────────────────────────────

@poster_bp.route("/case-upload", methods=["POST"])
@jwt_required
def upload_case():
    """上传计划书 PDF + 触发解析。"""
    user_id = str(getattr(request, "user_id", "guest"))
    product_id = request.form.get("productId", "")
    file = request.files.get("file")
    if not file:
        return error(ErrorCode.PARAM_ERROR, "请上传文件")
    return jsonify(_get_service().upload_case(user_id, product_id, file))


@poster_bp.route("/case-upload/<int:record_id>", methods=["GET"])
@jwt_required
def get_case_upload(record_id):
    """获取解析结果。"""
    user_id = str(getattr(request, "user_id", "guest"))
    return jsonify(_get_service().get_case_upload(record_id, user_id))


@poster_bp.route("/case-upload/<int:record_id>/confirm", methods=["PUT"])
@jwt_required
def confirm_case_upload(record_id):
    """核对/修正解析数据。"""
    user_id = str(getattr(request, "user_id", "guest"))
    return jsonify(_get_service().confirm_case_upload(record_id, user_id, request.get_json(silent=True) or {}))


# ─── 模板列表 ─────────────────────────────────────────────

@poster_bp.route("/templates", methods=["GET"])
@jwt_required
def list_templates():
    """获取可用海报模板列表。"""
    return jsonify(_get_service().get_templates())


@poster_bp.route("/copy-templates", methods=["GET"])
@jwt_required
def list_copy_templates():
    """获取可用文案模板列表。"""
    return jsonify(_get_service().get_copy_templates())


# ─── 文案生成 ─────────────────────────────────────────────

@poster_bp.route("/generate-copy", methods=["POST"])
@jwt_required
def generate_copy():
    """生成文案（template/ai 模式）。"""
    user_id = str(getattr(request, "user_id", "guest"))
    return jsonify(_get_service().generate_copy(user_id, request.get_json(silent=True) or {}))


# ─── 海报生成 ─────────────────────────────────────────────

@poster_bp.route("/generate", methods=["POST"])
@jwt_required
def generate_poster():
    """生成海报图片。"""
    user_id = str(getattr(request, "user_id", "guest"))
    return jsonify(_get_service().generate_poster(user_id, request.get_json(silent=True) or {}))


# ─── 下载海报 ─────────────────────────────────────────────

@poster_bp.route("/download/<int:record_id>", methods=["GET"])
@jwt_required
def download_poster(record_id):
    """下载海报文件。"""
    from insurance.models.poster_record import PosterRecord
    user_id = str(getattr(request, "user_id", "guest"))
    record = PosterRecord.query.get(record_id)
    if not record or record.user_id != user_id:
        return error(ErrorCode.NOT_FOUND, "记录不存在")
    if not record.export_url:
        return error(ErrorCode.NOT_FOUND, "文件不存在")
    # 路径安全校验：仅允许 uploads/posters 目录
    file_abs = os.path.abspath(record.export_url)
    posters_dir = os.path.abspath(os.path.join("uploads", "posters"))
    if not file_abs.startswith(posters_dir) or not os.path.exists(file_abs):
        return error(ErrorCode.NOT_FOUND, "文件不存在")
    return send_file(file_abs, as_attachment=True,
                     download_name=f"poster_{record_id}.png", mimetype="image/png")


# ─── 记录列表 ─────────────────────────────────────────────

@poster_bp.route("/records", methods=["GET"])
@jwt_required
def list_records():
    """当前用户的海报生成记录。"""
    user_id = str(getattr(request, "user_id", "guest"))
    params = {
        "page": request.args.get("page", 1, type=int),
        "page_size": request.args.get("page_size", 20, type=int),
    }
    return jsonify(_get_service().list_records(user_id, params))


@poster_bp.route("/records/<int:record_id>", methods=["GET"])
@jwt_required
def get_record(record_id):
    """记录详情。"""
    user_id = str(getattr(request, "user_id", "guest"))
    return jsonify(_get_service().get_record(record_id, user_id))