package dao

import (
	"context"
	"fmt"
	"model-gateway/consts/public"
	"model-gateway/model/entity"

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

var ModelGatewayTask = &modelGatewayTaskDao{}

type modelGatewayTaskDao struct{}

// Insert 插入
func (d *modelGatewayTaskDao) Insert(ctx context.Context, req *entity.ModelGatewayTask) (id int64, err error) {
	m := new(entity.ModelGatewayTask)
	err = gconv.Struct(req, &m)
	if err != nil {
		return
	}
	r, err := gfdb.DB(ctx, public.DbNameModelGateway).Model(ctx, public.TableNameTask).Insert(m)
	if err != nil {
		return
	}
	return r.LastInsertId()
}

// Update 更新（按ID）
func (d *modelGatewayTaskDao) Update(ctx context.Context, req *entity.ModelGatewayTask) (rows int64, err error) {
	r, err := gfdb.DB(ctx, public.DbNameModelGateway).Model(ctx, public.TableNameTask).
		OmitEmpty().
		Data(req).
		Where(entity.ModelGatewayTaskCol.Id, req.Id).
		Update()
	if err != nil {
		return
	}
	return r.RowsAffected()
}

// Get 获取（按TaskID 或 ID）
func (d *modelGatewayTaskDao) Get(ctx context.Context, req *entity.ModelGatewayTask) (m *entity.ModelGatewayTask, err error) {
	r, err := gfdb.DB(ctx, public.DbNameModelGateway).Model(ctx, public.TableNameTask).
		OmitEmpty().
		Where(entity.ModelGatewayTaskCol.TaskID, req.TaskID).
		Where(entity.ModelGatewayTaskCol.Id, req.Id).
		One()
	if err != nil {
		return
	}
	err = r.Struct(&m)
	return
}

// List 分页查询
func (d *modelGatewayTaskDao) List(ctx context.Context, pageNum, pageSize int, req *entity.ModelGatewayTask) (list []*entity.ModelGatewayTask, total int64, err error) {
	model := gfdb.DB(ctx, public.DbNameModelGateway).Model(ctx, public.TableNameTask).
		OmitEmpty().
		Where(entity.ModelGatewayTaskCol.Creator, req.Creator).
		Where(entity.ModelGatewayTaskCol.ModelName, "%"+req.ModelName+"%").
		Where(entity.ModelGatewayTaskCol.BizName, req.BizName).
		Where(entity.ModelGatewayTaskCol.State, req.State).
		Where(entity.ModelGatewayTaskCol.TaskID, req.TaskID).
		OrderDesc(entity.ModelGatewayTaskCol.CreatedAt)
	if pageNum > 0 && pageSize > 0 {
		model = model.Page(pageNum, pageSize)
	}
	r, totalInt, err := model.AllAndCount(false)
	if err != nil {
		return nil, 0, err
	}
	total = gconv.Int64(totalInt)
	err = r.Structs(&list)
	return
}

// Delete 删除（软删，按ID）
func (d *modelGatewayTaskDao) Delete(ctx context.Context, req *entity.ModelGatewayTask) (rows int64, err error) {
	r, err := gfdb.DB(ctx, public.DbNameModelGateway).Model(ctx, public.TableNameTask).
		Where(entity.ModelGatewayTaskCol.Id, req.Id).
		Delete()
	if err != nil {
		return
	}
	return r.RowsAffected()
}

// ListByTaskIDs 批量查询
func (d *modelGatewayTaskDao) ListByTaskIDs(ctx context.Context, taskIDs []string) (list []*entity.ModelGatewayTask, err error) {
	if len(taskIDs) == 0 {
		return nil, nil
	}
	r, err := gfdb.DB(ctx, public.DbNameModelGateway).Model(ctx, public.TableNameTask).
		WhereIn(entity.ModelGatewayTaskCol.TaskID, taskIDs).
		All()
	if err != nil {
		return nil, err
	}
	err = r.Structs(&list)
	return
}

// MarkDownloadedByID 标记已下载
func (d *modelGatewayTaskDao) MarkDownloadedByID(ctx context.Context, id int64) error {
	_, err := gfdb.DB(ctx, public.DbNameModelGateway).Model(ctx, public.TableNameTask).
		Where(entity.ModelGatewayTaskCol.Id, id).
		Where(entity.ModelGatewayTaskCol.State, 2).
		Data(map[string]any{entity.ModelGatewayTaskCol.State: 4}).
		Update()
	return err
}

// GetPendingAsyncTasks 获取进行中的异步任务
func (d *modelGatewayTaskDao) GetPendingAsyncTasks(ctx context.Context, limit int) ([]*entity.ModelGatewayTask, error) {
	var tasks []*entity.ModelGatewayTask
	err := gfdb.DB(ctx, public.DbNameModelGateway).Model(ctx, public.TableNameTask).
		Where(entity.ModelGatewayTaskCol.State, 1).
		Limit(limit).
		Scan(&tasks)
	return tasks, err
}

// ======================== 事务抢占 ========================

// ClaimByID 按主键抢占，返回抢占后的任务
func (d *modelGatewayTaskDao) ClaimByID(ctx context.Context, id int64) (*entity.ModelGatewayTask, error) {
	var task entity.ModelGatewayTask
	err := gfdb.DB(ctx, public.DbNameModelGateway).Transaction(ctx, func(ctx context.Context, tx gdb.TX) error {
		r, err := tx.Model(public.TableNameTask).
			Where(entity.ModelGatewayTaskCol.Id, id).
			Where(entity.ModelGatewayTaskCol.State, public.TaskStatusPending).
			Limit(1).
			LockUpdate().
			One()
		if err != nil {
			return err
		}
		if r.IsEmpty() {
			return fmt.Errorf("任务已被抢占或不存在: id=%d", id)
		}
		if err := r.Struct(&task); err != nil {
			return err
		}
		_, err = tx.Model(public.TableNameTask).
			Data(&entity.ModelGatewayTask{State: public.TaskStatusRunning}).
			Where(entity.ModelGatewayTaskCol.Id, id).
			OmitEmpty().
			Update()
		return err
	})
	if err != nil {
		return nil, err
	}
	return &task, nil
}