package app

import (
	"math"
	"strconv"

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

	notificationapp "github.com/break/junhong_cmp_fiber/internal/application/notification"
	"github.com/break/junhong_cmp_fiber/internal/middleware"
	"github.com/break/junhong_cmp_fiber/internal/model/dto"
	notificationquery "github.com/break/junhong_cmp_fiber/internal/query/notification"
	"github.com/break/junhong_cmp_fiber/pkg/errors"
	"github.com/break/junhong_cmp_fiber/pkg/logger"
	"github.com/break/junhong_cmp_fiber/pkg/response"
)

// ClientNotificationHandler 提供当前个人客户的简化站内通知接口。
type ClientNotificationHandler struct {
	query       *notificationquery.Query
	readService *notificationapp.ReadService
	validate    *validator.Validate
}

// NewClientNotificationHandler 创建个人客户站内通知 Handler。
func NewClientNotificationHandler(query *notificationquery.Query, readService *notificationapp.ReadService, validate *validator.Validate) *ClientNotificationHandler {
	return &ClientNotificationHandler{query: query, readService: readService, validate: validate}
}

// UnreadCount 查询当前个人客户的业务通知未读数。
// GET /api/c/v1/notifications/unread-count
func (h *ClientNotificationHandler) UnreadCount(c *fiber.Ctx) error {
	customerID, ok := middleware.GetCustomerID(c)
	if !ok || customerID == 0 {
		return errors.New(errors.CodeUnauthorized)
	}
	result, err := h.query.PersonalUnreadCount(c.UserContext(), customerID)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// List 查询当前个人客户的未过期业务通知列表。
// GET /api/c/v1/notifications
func (h *ClientNotificationHandler) List(c *fiber.Ctx) error {
	var request dto.PersonalNotificationListRequest
	if err := c.QueryParser(&request); err != nil {
		logPersonalNotificationListValidationFailure(c, request, err)
		return errors.New(errors.CodeInvalidParam)
	}
	if h.validate != nil {
		if err := h.validate.Struct(request); err != nil {
			logPersonalNotificationListValidationFailure(c, request, err)
			return errors.New(errors.CodeInvalidParam)
		}
	}
	customerID, ok := middleware.GetCustomerID(c)
	if !ok || customerID == 0 {
		return errors.New(errors.CodeUnauthorized)
	}
	result, err := h.query.PersonalList(c.UserContext(), customerID, request)
	if err != nil {
		return err
	}
	return response.SuccessWithPagination(c, result.Items, result.Total, result.Page, result.Size)
}

// MarkAllRead 将当前个人客户可见的全部通知幂等标记为已读。
// PUT /api/c/v1/notifications/read-all
func (h *ClientNotificationHandler) MarkAllRead(c *fiber.Ctx) error {
	customerID, ok := middleware.GetCustomerID(c)
	if !ok || customerID == 0 {
		return errors.New(errors.CodeUnauthorized)
	}
	result, err := h.readService.MarkAllPersonalRead(c.UserContext(), customerID)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// MarkRead 将当前个人客户的一条通知幂等标记为已读。
// PUT /api/c/v1/notifications/:id/read
func (h *ClientNotificationHandler) MarkRead(c *fiber.Ctx) error {
	notificationID, err := strconv.ParseUint(c.Params("id"), 10, 64)
	if err != nil || notificationID == 0 || notificationID > math.MaxInt64 {
		return errors.New(errors.CodeInvalidParam)
	}
	customerID, ok := middleware.GetCustomerID(c)
	if !ok || customerID == 0 {
		return errors.New(errors.CodeUnauthorized)
	}
	if err := h.readService.MarkPersonalRead(c.UserContext(), customerID, uint(notificationID)); err != nil {
		return err
	}
	return response.Success(c, dto.NotificationReadResponse{Success: true})
}

func logPersonalNotificationListValidationFailure(c *fiber.Ctx, request dto.PersonalNotificationListRequest, err error) {
	logger.GetAppLogger().Warn("个人客户站内通知列表参数验证失败",
		zap.String("method", c.Method()),
		zap.String("path", c.Path()),
		zap.Int("page", request.Page),
		zap.Int("page_size", request.PageSize),
		zap.Error(err),
	)
}