// Package handler provides HTTP handlers for various endpoints.
package handler

import (
	"net/http"

	"modelRT/database"
	"modelRT/diagram"
	"modelRT/logger"
	"modelRT/network"
	"modelRT/orm"

	"github.com/gin-gonic/gin"
	"github.com/gofrs/uuid"
)

// CircuitDiagramUpdateHandler define circuit diagram update process API
func CircuitDiagramUpdateHandler(c *gin.Context) {
	pgClient := database.GetPostgresDBClient()

	var request network.CircuitDiagramUpdateRequest
	if err := c.ShouldBindJSON(&request); err != nil {
		logger.Error(c, "unmarshal circuit diagram update info failed", "error", err)

		resp := network.FailureResponse{
			Code: http.StatusBadRequest,
			Msg:  err.Error(),
		}
		c.JSON(http.StatusOK, resp)
		return
	}

	graph, err := diagram.GetGraphMap(request.PageID)
	if err != nil {
		logger.Error(c, "get topologic data from set by pageID failed", "error", err)

		resp := network.FailureResponse{
			Code: http.StatusBadRequest,
			Msg:  err.Error(),
			PayLoad: map[string]interface{}{
				"page_id": request.PageID,
			},
		}
		c.JSON(http.StatusOK, resp)
		return
	}

	var topologicChangeInfos []network.TopologicUUIDChangeInfos
	for _, topologicLink := range request.TopologicLinks {
		changeInfo, err := network.ParseUUID(topologicLink)
		if err != nil {
			logger.Error(c, "format uuid from string failed", "error", err)

			resp := network.FailureResponse{
				Code: http.StatusBadRequest,
				Msg:  err.Error(),
				PayLoad: map[string]interface{}{
					"topologic_info": topologicLink,
				},
			}
			c.JSON(http.StatusOK, resp)
			return
		}
		topologicChangeInfos = append(topologicChangeInfos, changeInfo)
	}

	// open transaction
	tx := pgClient.Begin()

	for _, topologicChangeInfo := range topologicChangeInfos {
		err = database.UpdateTopologicIntoDB(c, tx, request.PageID, topologicChangeInfo)
		if err != nil {
			tx.Rollback()

			logger.Error(c, "update topologic info into DB failed", "topologic_info", topologicChangeInfo, "error", err)

			resp := network.FailureResponse{
				Code: http.StatusBadRequest,
				Msg:  err.Error(),
				PayLoad: map[string]interface{}{
					"topologic_info": topologicChangeInfo,
				},
			}
			c.JSON(http.StatusOK, resp)
			return
		}

		err = graph.UpdateEdge(topologicChangeInfo)
		if err != nil {
			tx.Rollback()

			logger.Error(c, "update topologic info failed", "topologic_info", topologicChangeInfo, "error", err)

			resp := network.FailureResponse{
				Code: http.StatusBadRequest,
				Msg:  err.Error(),
				PayLoad: map[string]interface{}{
					"topologic_info": topologicChangeInfo,
				},
			}
			c.JSON(http.StatusOK, resp)
			return
		}
	}

	for index, componentInfo := range request.ComponentInfos {
		componentUUID, err := database.UpdateComponentIntoDB(c, tx, componentInfo)
		if err != nil {
			logger.Error(c, "udpate component info into DB failed", "error", err)

			resp := network.FailureResponse{
				Code: http.StatusBadRequest,
				Msg:  err.Error(),
				PayLoad: map[string]interface{}{
					"page_id":        request.PageID,
					"component_info": request.ComponentInfos,
				},
			}
			c.JSON(http.StatusOK, resp)
			return
		}
		request.ComponentInfos[index].UUID = componentUUID
	}

	for _, info := range request.ComponentInfos {
		component := &orm.Component{
			GlobalUUID: uuid.FromStringOrNil(info.UUID),
			// NsPath
			// Tag         string                 `gorm:"column:TAG"`
			Name: info.Name,
			// ModelName   string                 `gorm:"column:MODEL_NAME"`
			// Description: info.Description,
			// GridID:      info.GridID,
			// ZoneID:      info.ZoneID,
			// StationID:   info.StationID,
			// Type        int                    `gorm:"column:TYPE"`
			// InService   bool                   `gorm:"column:IN_SERVICE"`
			// State       int                    `gorm:"column:STATE"`
			// Status      int                    `gorm:"column:STATUS"`
			// Connection  map[string]interface{} `gorm:"column:CONNECTION;type:jsonb;default:'{}'"`
			// Label       map[string]interface{} `gorm:"column:LABEL;type:jsonb;default:'{}'"`
			// Context     string                 `gorm:"column:CONTEXT"`
			Op: info.Op,
			// Ts: info.Ts,
		}

		// paramsJSON, err := simplejson.NewJson([]byte(info.Params))
		// if err != nil {
		// 	logger.Error(c, "unmarshal component info by concurrent map failed", "component_params", info.Params, "error", err)

		// 	resp := network.FailureResponse{
		// 		Code: http.StatusBadRequest,
		// 		Msg:  err.Error(),
		// 		PayLoad: map[string]interface{}{
		// 			"uuid":             info.UUID,
		// 			"component_params": info.Params,
		// 		},
		// 	}
		// 	c.JSON(http.StatusOK, resp)
		// 	return
		// }
		diagram.UpdateComponentMap(info.ID, component)
	}

	if len(request.FreeVertexs) > 0 {
		for _, freeVertex := range request.FreeVertexs {
			graph.FreeVertexs[freeVertex] = struct{}{}
		}
	}

	// commit transaction
	tx.Commit()

	resp := network.SuccessResponse{
		Code: http.StatusOK,
		Msg:  "success",
		PayLoad: map[string]interface{}{
			"page_id": request.PageID,
		},
	}
	c.JSON(http.StatusOK, resp)
}