package orm

import (
	"context"
	times "git.icechen.cn/monorepo/backend/pkg/time"
	"github.com/gofiber/fiber/v2"
	ctxLogger "github.com/luizsuper/ctxLoggers"
	"github.com/spf13/cast"
	"go.uber.org/zap"
	"gorm.io/gorm"
	"gorm.io/gorm/utils"
	"time"
)

func init() {
	if err := DB.Use(&TracePlugin{}); err != nil {
		panic(err)
	}
}

func GetContextDB(ctx context.Context) (*gorm.DB, error) {
	return DB.WithContext(ctx), nil
}

type SQL struct {
	Timestamp   string  `json:"timestamp"`     // 时间，格式：2006-01-02 15:04:05
	Stack       string  `json:"stack"`         // 文件地址和行号
	SQL         string  `json:"sql"`           // SQL 语句
	Rows        int64   `json:"rows_affected"` // 影响行数
	CostSeconds float64 `json:"cost_seconds"`  // 执行时长(单位秒)
}

const (
	callBackBeforeName = "core:before"
	callBackAfterName  = "core:after"
	startTime          = "_start_time"
)

type TracePlugin struct{}

func (op *TracePlugin) Name() string {
	return "tracePlugin"
}

func (op *TracePlugin) Initialize(db *gorm.DB) (err error) {
	// 开始前
	_ = db.Callback().Create().Before("gorm:before_create").Register(callBackBeforeName, before)
	_ = db.Callback().Query().Before("gorm:query").Register(callBackBeforeName, before)
	_ = db.Callback().Delete().Before("gorm:before_delete").Register(callBackBeforeName, before)
	_ = db.Callback().Update().Before("gorm:setup_reflect_value").Register(callBackBeforeName, before)
	_ = db.Callback().Row().Before("gorm:row").Register(callBackBeforeName, before)
	_ = db.Callback().Raw().Before("gorm:raw").Register(callBackBeforeName, before)

	// 结束后
	_ = db.Callback().Create().After("gorm:after_create").Register(callBackAfterName, after)
	_ = db.Callback().Query().After("gorm:after_query").Register(callBackAfterName, after)
	_ = db.Callback().Delete().After("gorm:after_delete").Register(callBackAfterName, after)
	_ = db.Callback().Update().After("gorm:after_update").Register(callBackAfterName, after)
	_ = db.Callback().Row().After("gorm:row").Register(callBackAfterName, after)
	_ = db.Callback().Raw().After("gorm:raw").Register(callBackAfterName, after)
	return
}

//记录db开始时间
func before(db *gorm.DB) {
	db.InstanceSet(startTime, time.Now())
	return
}

func after(db *gorm.DB) {
	_ctx := db.Statement.Context
	ctx, ok := _ctx.(context.Context)
	if !ok {
		return
	}
	defer ctx.Done()
	_ts, isExist := db.InstanceGet(startTime)
	if !isExist {
		return
	}
	ts, ok := _ts.(time.Time)
	if !ok {
		return
	}

	sql := db.Dialector.Explain(db.Statement.SQL.String(), db.Statement.Vars...)
	sqlInfo := new(SQL)
	sqlInfo.Timestamp = times.CSTLayoutString()
	sqlInfo.SQL = sql
	sqlInfo.Stack = utils.FileWithLineNum()
	sqlInfo.Rows = db.Statement.RowsAffected
	sqlInfo.CostSeconds = time.Since(ts).Seconds()

	ctxLogger.FInfo(nil, "sql", zap.Any("info", sqlInfo), zap.String("trace_id", cast.ToString(ctx.Value(fiber.HeaderXRequestID))))

	return
}