package main

import (
	"fmt"

	"strings"
	"sync"
	"sync/atomic"
)

func cutData(data []map[string]string, cut int) chan []map[string]string {
	lent := (len(data) / cut) + 1
	batchChan := make(chan []map[string]string, lent)
	for i := 0; i < len(data); i += cut {
		if i+cut > len(data) {
			batchChan <- data[i:]
			continue
		}
		batchChan <- data[i : i+cut]
	}
	return batchChan
}

func saveData(dataChan chan []map[string]string, set *Set, title []string, dir string) {
	var (
		wg       sync.WaitGroup
		current  int64
		errCount atomic.Int32
	)

	lent := len(dataChan)
	wg.Add(lent)
	for v := range dataChan {
		v := v
		go func() {
			defer wg.Done()
			defer func() {
				if e := recover(); e != nil {
					warning(fmt.Sprintf("协程弹出"))
				}
			}()
			defer func() {
				atomic.AddInt64(&current, 1)
				log("当前进度:%d/%d", current, lent)
				if current == int64(lent) {
					close(dataChan)
				}
			}()

			switch set.Op {
			case Add:
				add(title, v, &errCount)
			case OverWrite:
				table, err := db.DB()
				if err != nil {
					warning(err.Error())
				}
				defer table.Close()
				for _, item := range v {
					var (
						dataRaw strings.Builder
						judge   strings.Builder
					)

					is_start := true
					dataRaw.WriteString(fmt.Sprintf("SELECT %s From %s WHERE ", fmt.Sprintf("`%s`", strings.Join(set.OverWriteJudColumns, "`,`")), c.Table))
					for _, t := range set.OverWriteJudColumns {
						if strings.Contains(item[t], "'") {
							item[t] = strings.ReplaceAll(item[t], "'", "`")
						}
						if strings.Contains(item[t], `"`) {
							item[t] = strings.ReplaceAll(item[t], `"`, "`")
						}
						if is_start {
							judge.WriteString(fmt.Sprintf("%s=%s", t, item[t]))
							is_start = false
							continue
						}
						judge.WriteString(fmt.Sprintf(" AND %s=%s", t, item[t]))
					}
					dataRaw.WriteString(judge.String())
					dataRaw.WriteString(" LIMIT 1")
					raw := dataRaw.String()

					result, _err := table.Query(raw)
					defer result.Close()
					if _err != nil {
						warning(fmt.Sprintf(" 查询失败: %v", _err))
						return
					}
					var adds []map[string]string
					if result.Next() {
						var (
							updateRaw       strings.Builder
							updateStartLock = false
						)
						updateRaw.WriteString(fmt.Sprintf("Update %s Set ", c.Table))
						for key, value := range item {
							if !updateStartLock {
								updateRaw.WriteString(fmt.Sprintf(" %s=%s", key, value))
							}
							updateRaw.WriteString(fmt.Sprintf(",%s=%s", key, value))
						}
						updateRaw.WriteString(judge.String())
						update := updateRaw.String()
						result := db.Exec(update)
						if result.Error != nil {
							errCount.Add(1)
							warning(fmt.Sprintf("failed to insert user: %v", result.Error))
							return
						}
					} else {
						adds = append(adds, item)
					}
					if len(adds) > 0 {
						add(title, adds, &errCount)
					}

				}
			default:

			}
		}()
	}
	wg.Wait()
	success("导入完毕.....失败：%d", errCount.Load())

	finish(dir)
}

func add(title []string, v []map[string]string, errCount *atomic.Int32) {
	var (
		err   error
		query strings.Builder
	)
	query.WriteString(fmt.Sprintf("INSERT INTO %s (`%s`) VALUES ", c.Table, strings.Join(title, "`,`")))
	is_start := true
	for _, item := range v {
		var dataRaw strings.Builder
		if !is_start {
			dataRaw.WriteString(",")
		} else {
			is_start = false
		}
		dataRaw.WriteString(" (")
		for _, t := range title {
			if strings.Contains(item[t], "'") {
				item[t] = strings.ReplaceAll(item[t], "'", "`")
			}
			if strings.Contains(item[t], `"`) {
				item[t] = strings.ReplaceAll(item[t], `"`, "`")
			}
			dataRaw.WriteString(fmt.Sprintf("'%s',", item[t]))
		}
		str := dataRaw.String()
		str = str[:len(str)-1]
		query.WriteString(str + ")")
	}
	query.WriteString(";")
	raw := query.String()
	result := db.Exec(raw)
	if result.Error != nil {
		errCount.Add(1)
		warning(fmt.Sprintf("failed to insert user: %v", result.Error))
		return
	}
	if err != nil {
		errCount.Add(1)
		warning("数据保存失败:%v", err)
		return
	}
}