"""统计报表路由（A7 + A8）

GET /overview     使用概览
GET /trend        趋势数据
GET /kb-health    知识库健康度
GET /token-cost   Token 消耗统计
"""
from flask import Blueprint, request, jsonify
from insurance.stats.service import StatsService
from insurance.middleware.auth_middleware import admin_required

stats_bp = Blueprint("stats", __name__)
stats_service = StatsService()


@stats_bp.route("/overview", methods=["GET"])
@admin_required
def overview():
    """使用概览数据。"""
    result = stats_service.get_overview()
    return jsonify(result)


@stats_bp.route("/trend", methods=["GET"])
@admin_required
def trend():
    """趋势数据。"""
    metric = request.args.get("metric", "chat_count")
    start_date = request.args.get("start_date", "")
    end_date = request.args.get("end_date", "")
    granularity = request.args.get("granularity", "day")
    result = stats_service.get_trend(metric, start_date, end_date, granularity)
    return jsonify(result)


@stats_bp.route("/kb-health", methods=["GET"])
@admin_required
def kb_health():
    """知识库健康度。"""
    days = request.args.get("days", 7, type=int)
    result = stats_service.get_kb_health(days)
    return jsonify(result)


@stats_bp.route("/token-cost", methods=["GET"])
@admin_required
def token_cost():
    """Token 消耗统计（旧接口，保持兼容）。"""
    start_date = request.args.get("start_date", "")
    end_date = request.args.get("end_date", "")
    group_by = request.args.get("group_by", "model")
    result = stats_service.get_token_cost(start_date, end_date, group_by)
    return jsonify(result)


@stats_bp.route("/token-usage", methods=["GET"])
@admin_required
def token_usage():
    """Token 使用统计：总量 + 按模型 + 按用户 + 日趋势。"""
    params = {
        "start_date": request.args.get("start_date", ""),
        "end_date": request.args.get("end_date", ""),
        "models": request.args.getlist("models"),
    }
    result = stats_service.get_token_usage(params)
    return jsonify(result)


@stats_bp.route("/token-usage/models", methods=["GET"])
@admin_required
def token_usage_models():
    """获取可用的模型列表。"""
    result = stats_service.get_token_models()
    return jsonify(result)