package audit

import (
	"context"
	"encoding/json"
	"fmt"
	"os"

	udeModel "udeServer/internal/model"
)

// AsyncInsertLog inserts the log entry in a background goroutine. When the
// insert fails, the entry is appended to log_fallback.jsonl so the audit
// chain never silently loses data.
func AsyncInsertLog(logModel udeModel.TSystemLogModel, entry *udeModel.TSystemLog) {
	go func(e *udeModel.TSystemLog) {
		defer func() {
			if rec := recover(); rec != nil {
				fmt.Printf("panic in log insert: %v\n", rec)
			}
		}()
		if _, insErr := logModel.Insert(context.Background(), e); insErr != nil {
			fmt.Printf("system log insert failed: %v\n", insErr)
			data, mErr := json.Marshal(e)
			if mErr != nil {
				fmt.Printf("marshal fallback log error: %v\n", mErr)
				return
			}
			// JSON Line格式
			f, fErr := os.OpenFile("log_fallback.jsonl", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
			if fErr != nil {
				fmt.Printf("open fallback file error: %v\n", fErr)
				return
			}
			defer func() {
				if cErr := f.Close(); cErr != nil {
					fmt.Printf("close fallback file error: %v\n", cErr)
				}
			}()
			if _, wErr := f.WriteString(string(data) + "\n"); wErr != nil {
				fmt.Printf("write fallback log error: %v\n", wErr)
			}
		}
	}(entry)
}