package admin

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

	"github.com/break/junhong_cmp_fiber/internal/model/dto"
	associationSvc "github.com/break/junhong_cmp_fiber/internal/service/phone_asset_association"
	"github.com/break/junhong_cmp_fiber/pkg/errors"
	"github.com/break/junhong_cmp_fiber/pkg/response"
)

// PhoneAssetAssociationHandler 手机号—资产关联后台处理器。
// 仅提供查看投影与解除入口；关联只能由 H5 短信验证建立，后台不提供创建或补录入口。
type PhoneAssetAssociationHandler struct {
	service   *associationSvc.Service
	validator *validator.Validate
}

// NewPhoneAssetAssociationHandler 创建手机号—资产关联处理器。
func NewPhoneAssetAssociationHandler(service *associationSvc.Service, validator *validator.Validate) *PhoneAssetAssociationHandler {
	return &PhoneAssetAssociationHandler{service: service, validator: validator}
}

// List 查询手机号—资产关联列表。
// GET /api/admin/phone-asset-associations
func (h *PhoneAssetAssociationHandler) List(c *fiber.Ctx) error {
	if err := requirePlatformManagement(c); err != nil {
		return err
	}
	var request dto.ListPhoneAssetAssociationRequest
	if err := c.QueryParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}
	if err := h.validate("手机号资产关联查询参数不合法", &request); err != nil {
		return err
	}
	result, err := h.service.List(c.UserContext(), &request)
	if err != nil {
		return err
	}
	return response.SuccessWithPagination(c, result.Items, result.Total, result.Page, result.Size)
}

// Unbind 解除指定的一条手机号—资产关联。
// DELETE /api/admin/phone-asset-associations/:id
func (h *PhoneAssetAssociationHandler) Unbind(c *fiber.Ctx) error {
	if err := requirePlatformManagement(c); err != nil {
		return err
	}
	id, err := pathID(c)
	if err != nil {
		return err
	}
	var request dto.UnbindPhoneAssetAssociationRequest
	if err := c.BodyParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}
	// 路径字段由 Handler 解析后回填，再执行结构校验（ENG-ERR-002）。
	request.ID = id
	if err := h.validate("手机号资产解绑参数不合法", &request); err != nil {
		return err
	}
	result, err := h.service.Unbind(c.UserContext(), &request)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// BatchUnbind 按资产集合解除全部当前有效关联。
// POST /api/admin/phone-asset-associations/batch-unbind
func (h *PhoneAssetAssociationHandler) BatchUnbind(c *fiber.Ctx) error {
	if err := requirePlatformManagement(c); err != nil {
		return err
	}
	var request dto.BatchUnbindPhoneAssetAssociationRequest
	if err := c.BodyParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}
	if err := h.validate("手机号资产批量解绑参数不合法", &request); err != nil {
		return err
	}
	result, err := h.service.BatchUnbind(c.UserContext(), &request)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// CreateImportTask 创建手机号资产解绑 CSV 导入任务。
// POST /api/admin/phone-asset-associations/unbind-imports
func (h *PhoneAssetAssociationHandler) CreateImportTask(c *fiber.Ctx) error {
	if err := requirePlatformManagement(c); err != nil {
		return err
	}
	var request dto.CreatePhoneAssetUnbindImportRequest
	if err := c.BodyParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}
	if err := h.validate("手机号资产解绑导入参数不合法", &request); err != nil {
		return err
	}
	result, err := h.service.CreateImportTask(c.UserContext(), &request)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// ListImportTasks 查询手机号资产解绑导入任务列表。
// GET /api/admin/phone-asset-associations/unbind-imports
func (h *PhoneAssetAssociationHandler) ListImportTasks(c *fiber.Ctx) error {
	if err := requirePlatformManagement(c); err != nil {
		return err
	}
	var request dto.ListPhoneAssetUnbindImportRequest
	if err := c.QueryParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}
	if err := h.validate("手机号资产解绑导入查询参数不合法", &request); err != nil {
		return err
	}
	result, err := h.service.ListImportTasks(c.UserContext(), &request)
	if err != nil {
		return err
	}
	return response.SuccessWithPagination(c, result.Items, result.Total, result.Page, result.Size)
}

// ImportTaskDetail 查询手机号资产解绑导入任务详情与逐行结果。
// GET /api/admin/phone-asset-associations/unbind-imports/:id
func (h *PhoneAssetAssociationHandler) ImportTaskDetail(c *fiber.Ctx) error {
	if err := requirePlatformManagement(c); err != nil {
		return err
	}
	id, err := pathID(c)
	if err != nil {
		return err
	}
	result, err := h.service.GetImportTask(c.UserContext(), id)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// validate 执行结构校验，失败时返回字段级提示（ENG-ERR-002）。
func (h *PhoneAssetAssociationHandler) validate(prefix string, request any) error {
	if h.validator == nil {
		return errors.New(errors.CodeInternalError)
	}
	if err := h.validator.Struct(request); err != nil {
		return errors.New(errors.CodeInvalidParam, validationMessage(prefix, request, err))
	}
	return nil
}