package api

import (
	"context"
	"encoding/json"
	"strconv"
	"strings"

	"next-terminal/server/common"
	"next-terminal/server/common/maps"
	"next-terminal/server/log"
	"next-terminal/server/model"
	"next-terminal/server/repository"
	"next-terminal/server/service"
	"next-terminal/server/utils"

	"github.com/labstack/echo/v4"
	"github.com/robfig/cron/v3"
)

type ScheduledTaskApi struct{}

type ScheduledTaskDTO struct {
	ID          string           `json:"id"`
	EntryId     int              `json:"entryId"`
	Name        string           `json:"name"`
	Spec        string           `json:"spec"`
	Type        string           `json:"type"`
	AssetIdList []string         `json:"assetIdList"`
	Mode        string           `json:"mode"`
	Script      string           `json:"script"`
	Enabled     bool             `json:"enabled"`
	CreatedAt   common.JsonTime  `json:"createdAt"`
	UpdatedAt   common.JsonTime  `json:"updatedAt"`
	LastExecAt  *common.JsonTime `json:"lastExecAt,omitempty"`
}

type JobLogDTO struct {
	ID        string          `json:"id"`
	JobId     string          `json:"jobId"`
	JobType   string          `json:"jobType"`
	Results   []interface{}   `json:"results"`
	CreatedAt common.JsonTime `json:"createdAt"`
}

func JobLogToDTO(log model.JobLog, jobType string) JobLogDTO {
	var results []interface{}
	if log.Results != "" {
		_ = json.Unmarshal([]byte(log.Results), &results)
	}
	if results == nil {
		results = []interface{}{}
	}
	return JobLogDTO{
		ID:        log.ID,
		JobId:     log.JobId,
		JobType:   jobType,
		Results:   results,
		CreatedAt: log.Timestamp,
	}
}

func JobToDTO(job model.Job) ScheduledTaskDTO {
	dto := ScheduledTaskDTO{
		ID:        job.ID,
		EntryId:   job.CronJobId,
		Name:      job.Name,
		Spec:      job.Cron,
		Type:      job.Func,
		Mode:      job.Mode,
		Enabled:   job.Status == "enabled",
		CreatedAt: job.Created,
		UpdatedAt: job.Updated,
	}
	if job.ResourceIds != "" {
		dto.AssetIdList = strings.Split(job.ResourceIds, ",")
	}
	if job.Metadata != "" && job.Func == "asset-exec-command" {
		var metadataShell struct {
			Shell string `json:"shell"`
		}
		if err := json.Unmarshal([]byte(job.Metadata), &metadataShell); err == nil {
			dto.Script = metadataShell.Shell
		} else {
			dto.Script = job.Metadata
		}
	} else {
		dto.Script = job.Metadata
	}
	if !job.LastExecAt.IsZero() {
		dto.LastExecAt = &job.LastExecAt
	}
	return dto
}

func DTOToJob(dto ScheduledTaskDTO) model.Job {
	status := "disabled"
	if dto.Enabled {
		status = "enabled"
	}
	metadata := dto.Script
	if dto.Type == "asset-exec-command" && dto.Script != "" {
		metadataJSON, _ := json.Marshal(map[string]string{"shell": dto.Script})
		metadata = string(metadataJSON)
	}
	return model.Job{
		ID:          dto.ID,
		CronJobId:   dto.EntryId,
		Name:        dto.Name,
		Cron:        dto.Spec,
		Func:        dto.Type,
		ResourceIds: strings.Join(dto.AssetIdList, ","),
		Mode:        dto.Mode,
		Metadata:    metadata,
		Status:      status,
	}
}

func (api ScheduledTaskApi) AllEndpoint(c echo.Context) error {
	items, err := repository.JobRepository.FindAll(context.TODO())
	if err != nil {
		return err
	}
	var dtos []ScheduledTaskDTO
	for _, item := range items {
		dtos = append(dtos, JobToDTO(item))
	}
	if dtos == nil {
		dtos = []ScheduledTaskDTO{}
	}
	return Success(c, dtos)
}

func (api ScheduledTaskApi) PagingEndpoint(c echo.Context) error {
	pageIndex, _ := strconv.Atoi(c.QueryParam("pageIndex"))
	pageSize, _ := strconv.Atoi(c.QueryParam("pageSize"))
	name := c.QueryParam("name")
	status := c.QueryParam("status")
	order := c.QueryParam("order")
	field := c.QueryParam("field")

	items, total, err := repository.JobRepository.Find(context.TODO(), pageIndex, pageSize, name, status, order, field)
	if err != nil {
		return err
	}
	var dtos []ScheduledTaskDTO
	for _, item := range items {
		dtos = append(dtos, JobToDTO(item))
	}
	if dtos == nil {
		dtos = []ScheduledTaskDTO{}
	}
	return Success(c, maps.Map{
		"total": total,
		"items": dtos,
	})
}

func (api ScheduledTaskApi) CreateEndpoint(c echo.Context) error {
	var dto ScheduledTaskDTO
	if err := c.Bind(&dto); err != nil {
		return err
	}
	log.Info("Create ScheduledTask", log.Any("dto", dto))
	job := DTOToJob(dto)
	job.ID = utils.UUID()
	job.Created = common.NowJsonTime()
	job.Updated = common.NowJsonTime()
	if job.Status == "" {
		job.Status = "disabled"
	}

	if err := repository.JobRepository.Create(context.TODO(), &job); err != nil {
		return err
	}
	return Success(c, job.ID)
}

func (api ScheduledTaskApi) UpdateEndpoint(c echo.Context) error {
	id := c.Param("id")
	var dto ScheduledTaskDTO
	if err := c.Bind(&dto); err != nil {
		return err
	}
	job := DTOToJob(dto)
	job.ID = id
	job.Updated = common.NowJsonTime()
	if err := repository.JobRepository.UpdateById(context.TODO(), &job); err != nil {
		return err
	}
	return Success(c, nil)
}

func (api ScheduledTaskApi) DeleteEndpoint(c echo.Context) error {
	id := c.Param("id")
	if err := repository.JobRepository.DeleteJobById(context.TODO(), id); err != nil {
		return err
	}
	return Success(c, nil)
}

func (api ScheduledTaskApi) GetEndpoint(c echo.Context) error {
	id := c.Param("id")
	item, err := repository.JobRepository.FindById(context.TODO(), id)
	if err != nil {
		return err
	}
	dto := JobToDTO(item)
	log.Info("Get ScheduledTask", log.Any("dto", dto))
	return Success(c, dto)
}

func (api ScheduledTaskApi) ChangeStatusEndpoint(c echo.Context) error {
	id := c.Param("id")
	enabled := c.QueryParam("enabled") == "true"
	var status string
	if enabled {
		status = "enabled"
	} else {
		status = "disabled"
	}
	job := model.Job{
		ID:     id,
		Status: status,
	}
	if err := repository.JobRepository.UpdateById(context.TODO(), &job); err != nil {
		return err
	}
	return Success(c, nil)
}

func (api ScheduledTaskApi) ExecEndpoint(c echo.Context) error {
	id := c.Param("id")
	job, err := repository.JobRepository.FindById(context.TODO(), id)
	if err != nil {
		return err
	}

	now := common.NowJsonTime()
	jobUpdate := model.Job{
		ID:         id,
		LastExecAt: now,
	}
	if err := repository.JobRepository.UpdateById(context.TODO(), &jobUpdate); err != nil {
		return err
	}

	switch job.Func {
	case "asset-exec-command":
		shellJob := service.ShellJob{
			ID:          job.ID,
			Mode:        job.Mode,
			ResourceIds: job.ResourceIds,
			Metadata:    job.Metadata,
		}
		shellJob.Run()
	default:
		jobLog := &model.JobLog{
			ID:        utils.UUID(),
			JobId:     id,
			Timestamp: now,
			Message:   "任务执行成功",
		}
		_ = repository.JobLogRepository.Create(context.TODO(), jobLog)
	}

	return Success(c, nil)
}

func (api ScheduledTaskApi) GetLogsEndpoint(c echo.Context) error {
	jobId := c.Param("id")
	pageIndex, _ := strconv.Atoi(c.QueryParam("pageIndex"))
	pageSize, _ := strconv.Atoi(c.QueryParam("pageSize"))
	if pageIndex == 0 {
		pageIndex = 1
	}
	if pageSize == 0 {
		pageSize = 10
	}

	job, err := repository.JobRepository.FindById(context.TODO(), jobId)
	if err != nil {
		return err
	}

	items, total, err := repository.JobLogRepository.FindByJobId(context.TODO(), jobId, pageIndex, pageSize)
	if err != nil {
		return err
	}

	var dtos []JobLogDTO
	for _, item := range items {
		dtos = append(dtos, JobLogToDTO(item, job.Func))
	}
	if dtos == nil {
		dtos = []JobLogDTO{}
	}

	return Success(c, maps.Map{
		"total": total,
		"items": dtos,
	})
}

func (api ScheduledTaskApi) DeleteLogsEndpoint(c echo.Context) error {
	jobId := c.Param("id")
	if err := repository.JobLogRepository.DeleteByJobId(context.TODO(), jobId); err != nil {
		return err
	}
	return Success(c, nil)
}

func (api ScheduledTaskApi) NextTenRunsEndpoint(c echo.Context) error {
	var req struct {
		Spec string `json:"spec"`
	}
	if err := c.Bind(&req); err != nil {
		return err
	}

	var results []string
	if req.Spec == "" {
		return Success(c, results)
	}

	parser := cron.NewParser(cron.Minute | cron.Hour | cron.Dom | cron.Month | cron.Dow)
	schedule, err := parser.Parse(req.Spec)
	if err != nil {
		return Success(c, results)
	}

	now := common.NowJsonTime().Time
	for i := 0; i < 10; i++ {
		next := schedule.Next(now)
		results = append(results, next.Format("2006-01-02 15:04:05"))
	}

	return Success(c, results)
}