package web

import (
	"context"
	"fmt"
	v1 "github.com/go-nunu/nunu-layout-advanced/api/v1"
	"github.com/go-nunu/nunu-layout-advanced/internal/model"
)

type Origin interface {
	CreateOriginServers(ctx context.Context, req *v1.WebForwardingRequest) (map[string]int64, error)
	AddOriginsToWebsite(ctx context.Context, req *v1.WebForwardingRequest, webId int64) (map[string]int64, error)
	UpdateOriginServers(ctx context.Context, req *v1.WebForwardingRequest, oldData *model.WebForwarding, ipData *model.WebForwardingRule) error
}

// CreateOriginServers 创建源站服务器
func (s *aidedWebService) CreateOriginServers(ctx context.Context, req *v1.WebForwardingRequest) (map[string]int64, error) {
	cdnOriginIds := make(map[string]int64)

	for _, backend := range req.WebForwardingData.BackendList {
		apiType := s.GetProtocolType(backend.IsHttps)

		id, err := s.wafformatter.AddOrigin(ctx, v1.WebJson{
			ApiType:     apiType,
			BackendList: backend.Addr,
			Host:        backend.CustomHost,
			Comment:     req.WebForwardingData.Comment,
		})
		if err != nil {
			return nil, fmt.Errorf("添加源站 %s 失败: %w", backend.Addr, err)
		}
		cdnOriginIds[backend.Addr] = id
	}

	return cdnOriginIds, nil
}


// AddOriginsToWebsite 添加源站到网站
func (s *aidedWebService) AddOriginsToWebsite(ctx context.Context, req *v1.WebForwardingRequest, webId int64) (map[string]int64, error) {
	cdnOriginIds, err := s.CreateOriginServers(ctx, req)
	if err != nil {
		return nil, fmt.Errorf("创建源站服务器失败: %w", err)
	}

	// 添加源站到网站
	for _, originId := range cdnOriginIds {
		if err := s.cdn.AddServerOrigin(ctx, webId, originId); err != nil {
			return nil, fmt.Errorf("添加源站到网站失败: %w", err)
		}
	}

	return cdnOriginIds, nil
}

// UpdateOriginServers 更新源站服务器
func (s *aidedWebService) UpdateOriginServers(ctx context.Context, req *v1.WebForwardingRequest, oldData *model.WebForwarding, ipData *model.WebForwardingRule) error {
	addOrigins, delOrigins := s.FindDifferenceList(ipData.BackendList, req.WebForwardingData.BackendList)
	addedIds := make(map[string]int64)

	// 添加新源站
	for _, v := range addOrigins {
		apiType := s.GetProtocolType(v.IsHttps)
		id, err := s.wafformatter.AddOrigin(ctx, v1.WebJson{
			ApiType:     apiType,
			BackendList: v.Addr,
			Host:        v.CustomHost,
			Comment:     req.WebForwardingData.Comment,
		})
		if err != nil {
			return fmt.Errorf("添加源站 %s 失败: %w", v.Addr, err)
		}
		addedIds[v.Addr] = id
	}

	// 将新源站添加到网站
	for _, v := range addedIds {
		if err := s.cdn.AddServerOrigin(ctx, int64(oldData.CdnWebId), v); err != nil {
			return fmt.Errorf("添加源站到网站失败: %w", err)
		}
	}

	// 删除旧源站
	for k, v := range ipData.CdnOriginIds {
		for _, ip := range delOrigins {
			if k == ip.Addr {
				if err := s.cdn.DelServerOrigin(ctx, int64(oldData.CdnWebId), v); err != nil {
					return fmt.Errorf("删除源站失败: %w", err)
				}
				delete(ipData.CdnOriginIds, k)
			}
		}
	}

	// 合并新的源站ID
	for k, v := range addedIds {
		ipData.CdnOriginIds[k] = v
	}

	return nil
}