package admin

import (
	"strings"

	"github.com/go-playground/validator/v10"
	"github.com/gofiber/fiber/v2"

	"github.com/break/junhong_cmp_fiber/internal/model/dto"
	pollingSvc "github.com/break/junhong_cmp_fiber/internal/service/polling"
	"github.com/break/junhong_cmp_fiber/pkg/errors"
	"github.com/break/junhong_cmp_fiber/pkg/response"
)

// CarrierSchedulerHandler 按运营商账户调度的后台接口：调度参数、请求检查场景、失败告警、单卡轮询状态、按账户监控。
type CarrierSchedulerHandler struct {
	service   *pollingSvc.CarrierSchedulerService
	validator *validator.Validate
}

// NewCarrierSchedulerHandler 创建按运营商账户调度 Handler。
func NewCarrierSchedulerHandler(service *pollingSvc.CarrierSchedulerService, validator *validator.Validate) *CarrierSchedulerHandler {
	return &CarrierSchedulerHandler{service: service, validator: validator}
}

func (h *CarrierSchedulerHandler) validate(prefix string, req any) error {
	if err := h.validator.Struct(req); err != nil {
		return errors.New(errors.CodeInvalidParam, validationMessage(prefix, req, err))
	}
	return nil
}

// ListParams 查询运营商账户调度参数列表。GET /api/admin/polling-carrier-params
func (h *CarrierSchedulerHandler) ListParams(c *fiber.Ctx) error {
	result, err := h.service.ListParams(c.UserContext())
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// GetParam 查询运营商账户调度参数。GET /api/admin/polling-carrier-params/:carrier_id
func (h *CarrierSchedulerHandler) GetParam(c *fiber.Ctx) error {
	carrierID, err := rateLimitPathID(c, "carrier_id", "运营商账户 ID")
	if err != nil {
		return err
	}
	result, err := h.service.GetParam(c.UserContext(), carrierID)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// SaveParam 保存运营商账户调度参数。PUT /api/admin/polling-carrier-params/:carrier_id
func (h *CarrierSchedulerHandler) SaveParam(c *fiber.Ctx) error {
	var req dto.SaveCarrierPollingParamRequest
	if err := c.BodyParser(&req); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}
	carrierID, err := rateLimitPathID(c, "carrier_id", "运营商账户 ID")
	if err != nil {
		return err
	}
	req.CarrierID = carrierID
	if err := h.validate("运营商账户调度参数不合法", &req); err != nil {
		return err
	}
	result, err := h.service.SaveParam(c.UserContext(), &req)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// DeleteParam 删除运营商账户调度参数（恢复全局默认）。DELETE /api/admin/polling-carrier-params/:carrier_id
func (h *CarrierSchedulerHandler) DeleteParam(c *fiber.Ctx) error {
	carrierID, err := rateLimitPathID(c, "carrier_id", "运营商账户 ID")
	if err != nil {
		return err
	}
	if err := h.service.DeleteParam(c.UserContext(), carrierID); err != nil {
		return err
	}
	return response.Success(c, nil)
}

// ListScenes 查询请求检查场景。GET /api/admin/polling-check-scenes
func (h *CarrierSchedulerHandler) ListScenes(c *fiber.Ctx) error {
	result, err := h.service.ListScenes(c.UserContext())
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// UpdateScene 修改请求检查场景。PUT /api/admin/polling-check-scenes/:scene
func (h *CarrierSchedulerHandler) UpdateScene(c *fiber.Ctx) error {
	var req dto.UpdatePollingCheckSceneRequest
	if err := c.BodyParser(&req); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}
	req.Scene = strings.TrimSpace(c.Params("scene"))
	if req.Scene == "" {
		return errors.New(errors.CodeInvalidParam, "无效的场景编码")
	}
	if err := h.validate("请求检查场景参数不合法", &req); err != nil {
		return err
	}
	result, err := h.service.UpdateScene(c.UserContext(), &req)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// ListAlerts 查询卡轮询失败告警列表。GET /api/admin/polling-failure-alerts
func (h *CarrierSchedulerHandler) ListAlerts(c *fiber.Ctx) error {
	var req dto.PollingFailureAlertListRequest
	if err := c.QueryParser(&req); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}
	if err := h.validate("卡轮询失败告警查询参数不合法", &req); err != nil {
		return err
	}
	result, err := h.service.ListAlerts(c.UserContext(), &req)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// AlertSummary 未处理告警按运营商账户 × 错误类别汇总。GET /api/admin/polling-failure-alerts/summary
func (h *CarrierSchedulerHandler) AlertSummary(c *fiber.Ctx) error {
	result, err := h.service.AlertSummary(c.UserContext())
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// GetAlert 查询卡轮询失败告警详情。GET /api/admin/polling-failure-alerts/:id
func (h *CarrierSchedulerHandler) GetAlert(c *fiber.Ctx) error {
	id, err := rateLimitPathID(c, "id", "告警 ID")
	if err != nil {
		return err
	}
	result, err := h.service.GetAlert(c.UserContext(), id)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// HandleAlert 标记卡轮询失败告警已处理。PUT /api/admin/polling-failure-alerts/:id/status
func (h *CarrierSchedulerHandler) HandleAlert(c *fiber.Ctx) error {
	var req dto.HandlePollingFailureAlertRequest
	if err := c.BodyParser(&req); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}
	id, err := rateLimitPathID(c, "id", "告警 ID")
	if err != nil {
		return err
	}
	req.ID = id
	if err := h.validate("卡轮询失败告警处理参数不合法", &req); err != nil {
		return err
	}
	if err := h.service.HandleAlert(c.UserContext(), &req); err != nil {
		return err
	}
	return response.Success(c, nil)
}

// CardState 查询单卡轮询状态。GET /api/admin/iot-cards/:id/polling-state
func (h *CarrierSchedulerHandler) CardState(c *fiber.Ctx) error {
	id, err := rateLimitPathID(c, "id", "卡 ID")
	if err != nil {
		return err
	}
	result, err := h.service.CardState(c.UserContext(), id)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// CarrierStats 按运营商账户的轮询队列与执行监控。GET /api/admin/polling-stats/carrier-queues
func (h *CarrierSchedulerHandler) CarrierStats(c *fiber.Ctx) error {
	result, err := h.service.CarrierStats(c.UserContext())
	if err != nil {
		return err
	}
	return response.Success(c, result)
}