package backupmonitor

import (
	"encoding/json"
	"errors"
	"net/http"
	"os"

	"hfb_sys/backend/pkg/response"

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

type Status struct {
	GeneratedAt string `json:"generated_at"`
	Health      string `json:"health"`
	Schedule    struct {
		Enabled               string `json:"enabled"`
		FullHour              string `json:"full_hour"`
		FullMinute            string `json:"full_minute"`
		BinlogIntervalMinutes string `json:"binlog_interval_minutes"`
	} `json:"schedule"`
	LastFull struct {
		LocalComplete  string `json:"local_complete"`
		RemoteComplete string `json:"remote_complete"`
	} `json:"last_full"`
	LastBinlog struct {
		File      string `json:"file"`
		RemoteDir string `json:"remote_dir"`
	} `json:"last_binlog"`
	LastJob struct {
		Type    string `json:"type"`
		Status  string `json:"status"`
		At      string `json:"at"`
		Message string `json:"message"`
	} `json:"last_job"`
}

type Handler struct{ path string }

func NewHandler(path string) *Handler { return &Handler{path: path} }

func (h *Handler) Status(c *gin.Context) {
	content, err := os.ReadFile(h.path)
	if err != nil {
		if errors.Is(err, os.ErrNotExist) {
			response.Error(c, http.StatusServiceUnavailable, "backup_status_unavailable", "备份状态尚未生成")
			return
		}
		response.Error(c, http.StatusInternalServerError, "backup_status_unavailable", "无法读取备份状态")
		return
	}
	var status Status
	if err := json.Unmarshal(content, &status); err != nil {
		response.Error(c, http.StatusServiceUnavailable, "backup_status_invalid", "备份状态文件格式无效")
		return
	}
	response.OK(c, status)
}