package admin

import (
	"strconv"

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

	h5popupapp "github.com/break/junhong_cmp_fiber/internal/application/h5popup"
	"github.com/break/junhong_cmp_fiber/internal/handler/validation"
	"github.com/break/junhong_cmp_fiber/internal/model/dto"
	h5popupquery "github.com/break/junhong_cmp_fiber/internal/query/h5popup"
	"github.com/break/junhong_cmp_fiber/pkg/errors"
	"github.com/break/junhong_cmp_fiber/pkg/response"
)

// H5PopupConfigurationHandler H5 运营弹窗配置后台 Handler。
// 全部接口仅超级管理员与平台账号可用，代理与企业统一返回 403。
type H5PopupConfigurationHandler struct {
	service   *h5popupapp.ConfigurationService
	query     *h5popupquery.Query
	validator *validator.Validate
}

// NewH5PopupConfigurationHandler 创建 H5 运营弹窗配置后台 Handler。
func NewH5PopupConfigurationHandler(service *h5popupapp.ConfigurationService, query *h5popupquery.Query, validate *validator.Validate) *H5PopupConfigurationHandler {
	return &H5PopupConfigurationHandler{service: service, query: query, validator: validate}
}

// ListH5PopupConfigurations 查询运营弹窗配置列表。
// GET /api/admin/h5-popup-configurations
func (h *H5PopupConfigurationHandler) ListH5PopupConfigurations(c *fiber.Ctx) error {
	if err := requirePlatformManagement(c); err != nil {
		return err
	}
	var request dto.H5PopupConfigurationListRequest
	if err := c.QueryParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam)
	}
	if h.validator != nil {
		if err := h.validator.Struct(&request); err != nil {
			return errors.New(errors.CodeInvalidParam, validation.Message("运营弹窗配置列表参数不合法", &request, err))
		}
	}
	if h.query == nil {
		return errors.New(errors.CodeServiceUnavailable, "运营弹窗配置维护能力尚未配置")
	}
	result, err := h.query.List(c.UserContext(), request)
	if err != nil {
		return err
	}
	return response.SuccessWithPagination(c, result.Items, result.Total, result.Page, result.Size)
}

// GetH5PopupConfiguration 查询运营弹窗配置详情。
// GET /api/admin/h5-popup-configurations/:id
func (h *H5PopupConfigurationHandler) GetH5PopupConfiguration(c *fiber.Ctx) error {
	if err := requirePlatformManagement(c); err != nil {
		return err
	}
	id, err := h.parseID(c)
	if err != nil {
		return err
	}
	if h.query == nil {
		return errors.New(errors.CodeServiceUnavailable, "运营弹窗配置维护能力尚未配置")
	}
	result, err := h.query.Get(c.UserContext(), id)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// CreateH5PopupConfiguration 创建运营弹窗配置，初始版本为 1。
// POST /api/admin/h5-popup-configurations
func (h *H5PopupConfigurationHandler) CreateH5PopupConfiguration(c *fiber.Ctx) error {
	if err := requirePlatformManagement(c); err != nil {
		return err
	}
	var request dto.CreateH5PopupConfigurationRequest
	if err := c.BodyParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam)
	}
	if h.validator != nil {
		if err := h.validator.Struct(&request); err != nil {
			return errors.New(errors.CodeInvalidParam, validation.Message("创建运营弹窗配置参数不合法", &request, err))
		}
	}
	if h.service == nil || h.query == nil {
		return errors.New(errors.CodeServiceUnavailable, "运营弹窗配置维护能力尚未配置")
	}
	id, err := h.service.Create(c.UserContext(), request)
	if err != nil {
		return err
	}
	result, err := h.query.Get(c.UserContext(), id)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// UpdateH5PopupConfiguration 更新运营弹窗配置并递增版本。
// PUT /api/admin/h5-popup-configurations/:id
func (h *H5PopupConfigurationHandler) UpdateH5PopupConfiguration(c *fiber.Ctx) error {
	if err := requirePlatformManagement(c); err != nil {
		return err
	}
	id, err := h.parseID(c)
	if err != nil {
		return err
	}
	var request dto.UpdateH5PopupConfigurationParams
	if err := c.BodyParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam)
	}
	// 路径来源字段必须由 Handler 回填后再校验，避免被请求体覆盖，也避免 required 恒失败。
	request.ID = id
	if h.validator != nil {
		if err := h.validator.Struct(&request); err != nil {
			return errors.New(errors.CodeInvalidParam, validation.Message("更新运营弹窗配置参数不合法", &request, err))
		}
	}
	if h.service == nil || h.query == nil {
		return errors.New(errors.CodeServiceUnavailable, "运营弹窗配置维护能力尚未配置")
	}
	if err := h.service.Update(c.UserContext(), id, request.UpdateH5PopupConfigurationRequest); err != nil {
		return err
	}
	result, err := h.query.Get(c.UserContext(), id)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// EnableH5PopupConfiguration 启用运营弹窗配置，仅影响后续候选并刷新最近更新时间。
// POST /api/admin/h5-popup-configurations/:id/enable
func (h *H5PopupConfigurationHandler) EnableH5PopupConfiguration(c *fiber.Ctx) error {
	return h.setEnabled(c, true)
}

// DisableH5PopupConfiguration 停用运营弹窗配置，仅影响后续候选并刷新最近更新时间。
// POST /api/admin/h5-popup-configurations/:id/disable
func (h *H5PopupConfigurationHandler) DisableH5PopupConfiguration(c *fiber.Ctx) error {
	return h.setEnabled(c, false)
}

func (h *H5PopupConfigurationHandler) setEnabled(c *fiber.Ctx, enabled bool) error {
	if err := requirePlatformManagement(c); err != nil {
		return err
	}
	id, err := h.parseID(c)
	if err != nil {
		return err
	}
	if h.service == nil || h.query == nil {
		return errors.New(errors.CodeServiceUnavailable, "运营弹窗配置维护能力尚未配置")
	}
	if err := h.service.SetEnabled(c.UserContext(), id, enabled); err != nil {
		return err
	}
	result, err := h.query.Get(c.UserContext(), id)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// parseID 从路径解析运营弹窗配置 ID。
func (h *H5PopupConfigurationHandler) parseID(c *fiber.Ctx) (uint, error) {
	id, err := strconv.ParseUint(c.Params("id"), 10, 64)
	if err != nil || id == 0 {
		return 0, errors.New(errors.CodeInvalidParam, "运营弹窗配置ID不合法")
	}
	return uint(id), nil
}