package session

import (
	flow "ai-agent/workflow/consts/flow"
	"ai-agent/workflow/consts/public"
	sessionDto "ai-agent/workflow/model/dto/session"
	"ai-agent/workflow/model/entity"
	"context"
	"fmt"
	"time"

	"gitea.redpowerfuture.com/red-future/common/beans"
	"gitea.redpowerfuture.com/red-future/common/db/gfdb"
	"github.com/gogf/gf/v2/util/gconv"
)

var ExecWorkflowDao = &execWorkflowDao{}

type execWorkflowDao struct{}

func (d *execWorkflowDao) Insert(ctx context.Context, req *sessionDto.CreateWorkflowReq) (id int64, err error) {
	var s = new(entity.ExecWorkflow)
	if err = gconv.Struct(req, &s); err != nil {
		return
	}
	r, err := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).Insert(s)
	if err != nil {
		return
	}
	return r.LastInsertId()
}

func (d *execWorkflowDao) Delete(ctx context.Context, req *sessionDto.DeleteExecWorkflowReq) (rows int64, err error) {
	r, err := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).Where(entity.ExecWorkflowCol.Id, req.Id).Delete()
	if err != nil {
		return
	}
	return r.RowsAffected()
}

func (d *execWorkflowDao) Update(ctx context.Context, req *sessionDto.UpdateWorkflowReq) (rows int64, err error) {
	if req.Id <= 0 {
		return
	}
	r, err := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).OmitEmpty().Data(&req).Where(entity.ExecWorkflowCol.Id, req.Id).Update()
	if err != nil {
		return
	}
	return r.RowsAffected()
}

// ClearError 清空执行记录的报错信息（重新执行成功后调用，OmitEmpty 的 Update 会跳过空串，需显式写空）
func (d *execWorkflowDao) ClearError(ctx context.Context, id int64) (rows int64, err error) {
	r, err := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).
		Where(entity.ExecWorkflowCol.Id, id).
		Data(map[string]any{
			entity.ExecWorkflowCol.ErrorMessage: "",
			entity.ExecWorkflowCol.Error:        "",
		}).
		Update()
	if err != nil {
		return
	}
	return r.RowsAffected()
}

func (d *execWorkflowDao) GetById(ctx context.Context, id int64) (res *entity.ExecWorkflow, err error) {
	r, err := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).
		Where(entity.ExecWorkflowCol.Id, id).
		One()
	if err != nil {
		return
	}
	err = r.Struct(&res)
	return
}

func (d *execWorkflowDao) List(ctx context.Context, creator string, page *beans.Page) (res []*entity.ExecWorkflow, total int, err error) {
	m := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).
		Where(entity.ExecWorkflowCol.Creator, creator)
	m.OrderDesc(entity.ExecWorkflowCol.CreatedAt)
	if page != nil {
		m.Page(int(page.PageNum), int(page.PageSize))
	}
	r, total, err := m.AllAndCount(false)
	if err != nil {
		return
	}
	err = r.Structs(&res)
	return
}

// GetLatestBySessionAndFlow 查询会话+工作流下最近一次执行记录（按创建时间倒序，无记录返回 nil）
func (d *execWorkflowDao) GetLatestBySessionAndFlow(ctx context.Context, sessionId string, flowId int64) (res *entity.ExecWorkflow, err error) {
	r, err := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).
		Where(entity.ExecWorkflowCol.SessionId, sessionId).
		Where(entity.ExecWorkflowCol.FlowId, flowId).
		OrderDesc(entity.ExecWorkflowCol.CreatedAt).
		Limit(1).
		One()
	if err != nil {
		return
	}
	if r.IsEmpty() {
		return nil, nil
	}
	err = r.Struct(&res)
	return
}

// ListBySession 查询会话下工作流执行记录（按创建时间倒序）
func (d *execWorkflowDao) ListBySession(ctx context.Context, sessionId string) (res []*entity.ExecWorkflow, err error) {
	r, err := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).
		Where(entity.ExecWorkflowCol.SessionId, sessionId).
		OrderDesc(entity.ExecWorkflowCol.CreatedAt).
		All()
	if err != nil {
		return
	}
	err = r.Structs(&res)
	return
}

// ResetRunning 置为运行中并刷新心跳（execute 复用失败记录 / reExecute / 恢复例程共用；
// 用 map 更新避免 OmitEmpty 省略 0 值，同时写 status、last_heartbeat、node_group_id）
func (d *execWorkflowDao) ResetRunning(ctx context.Context, id int64, nodeGroupId string) error {
	_, err := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).
		Where(entity.ExecWorkflowCol.Id, id).
		Data(map[string]any{
			entity.ExecWorkflowCol.Status:        gconv.Int8(*flow.FlowExecutionStatusRunning.Code()),
			entity.ExecWorkflowCol.LastHeartbeat: time.Now().UnixMilli(),
			entity.ExecWorkflowCol.NodeGroupId:   nodeGroupId,
		}).
		Update()
	return err
}

// TouchHeartbeat 更新执行心跳（毫秒时间戳），供后台心跳 goroutine 每 30s 调用一次
func (d *execWorkflowDao) TouchHeartbeat(ctx context.Context, id int64) error {
	_, err := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).
		Where(entity.ExecWorkflowCol.Id, id).
		Data(map[string]any{entity.ExecWorkflowCol.LastHeartbeat: time.Now().UnixMilli()}).
		Update()
	return err
}

// UpdateRetry 更新重试标记与已重试次数（map 更新，retryable=0 也需写入）
func (d *execWorkflowDao) UpdateRetry(ctx context.Context, id int64, retryable int, retryCount int) error {
	_, err := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).
		Where(entity.ExecWorkflowCol.Id, id).
		Data(map[string]any{
			entity.ExecWorkflowCol.Retryable:  retryable,
			entity.ExecWorkflowCol.RetryCount: retryCount,
		}).
		Update()
	return err
}

// ListRecoverable 返回可恢复执行：僵尸运行中（status=1 且心跳陈旧）或可重试失败（status=3 且 retryable=1 且未耗尽）
func (d *execWorkflowDao) ListRecoverable(ctx context.Context, now int64, staleBefore int64, maxRetry int) (res []*entity.ExecWorkflow, err error) {
	r, err := gfdb.DB(ctx, public.DbNameBlackDeacon).Model(ctx, public.TableNameExecWorkflow).
		Where(fmt.Sprintf("(%s = ? AND %s < ?) OR (%s = ? AND %s = 1 AND %s < ?)",
			entity.ExecWorkflowCol.Status, entity.ExecWorkflowCol.LastHeartbeat,
			entity.ExecWorkflowCol.Status, entity.ExecWorkflowCol.Retryable, entity.ExecWorkflowCol.RetryCount),
			gconv.Int8(*flow.FlowExecutionStatusRunning.Code()), staleBefore,
			gconv.Int8(*flow.FlowExecutionStatusFailed.Code()), maxRetry).
		All()
	if err != nil {
		return
	}
	// 用 All+Structs 而非 Scan：Scan 生成的列清单会丢嵌入 SQLBaseDO 的 id 等基础列，恢复例程需要 id
	err = r.Structs(&res)
	return
}