package ioswitch2

import (
	"context"
	"fmt"
	"io"

	"gitlink.org.cn/cloudream/common/pkgs/types"
	"gitlink.org.cn/cloudream/common/utils/io2"
	"gitlink.org.cn/cloudream/common/utils/serder"
	stgglb "gitlink.org.cn/cloudream/jcs-pub/common/globals"
	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/ioswitch/exec"
	hubrpc "gitlink.org.cn/cloudream/jcs-pub/common/pkgs/rpc/hub"
	jcstypes "gitlink.org.cn/cloudream/jcs-pub/common/types"
)

var _ = serder.UseTypeUnionExternallyTagged(types.Ref(types.NewTypeUnion[exec.WorkerInfo](
	(*HubWorker)(nil),
	(*HttpHubWorker)(nil),
)))

type HubWorker struct {
	Hub     jcstypes.Hub
	Address jcstypes.GRPCAddressInfo
}

func (w *HubWorker) Name() string {
	return fmt.Sprintf("%v", w.Hub.HubID)
}

func (w *HubWorker) NewClient() (exec.WorkerClient, error) {
	cli := stgglb.HubRPCPool.Get(stgglb.SelectGRPCAddress(&w.Hub, &w.Address))
	return &HubWorkerClient{workerName: w.Name(), hubID: w.Hub.HubID, cli: cli}, nil
}

func (w *HubWorker) String() string {
	return w.Hub.String()
}

func (w *HubWorker) Equals(worker exec.WorkerInfo) bool {
	aw, ok := worker.(*HubWorker)
	if !ok {
		return false
	}

	return w.Hub.HubID == aw.Hub.HubID
}

type HubWorkerClient struct {
	workerName string
	hubID      jcstypes.HubID
	cli        *hubrpc.Client
}

func (c *HubWorkerClient) ExecutePlan(ctx context.Context, plan exec.Plan) (exec.ExecutorResult, error) {
	resp, err := c.cli.ExecuteIOPlan(ctx, &hubrpc.ExecuteIOPlan{Plan: plan, WorkerName: c.workerName})
	if err != nil {
		return exec.ExecutorResult{}, err.ToError()
	}

	return resp.Result, nil
}
func (c *HubWorkerClient) SendStream(ctx context.Context, planID exec.PlanID, id exec.VarID, stream io.ReadCloser) error {
	_, err := c.cli.SendIOStream(ctx, &hubrpc.SendIOStream{
		PlanID: planID,
		VarID:  id,
		Stream: io2.CounterCloser(stream, func(cnt int64, err error) {
			if stgglb.Stats.HubTransfer != nil {
				stgglb.Stats.HubTransfer.RecordOutput(c.hubID, cnt, err == nil || err == io.EOF)
			}
		}),
	})
	return err.ToError()
}
func (c *HubWorkerClient) SendVar(ctx context.Context, planID exec.PlanID, id exec.VarID, value exec.VarValue) error {
	_, err := c.cli.SendIOVar(ctx, &hubrpc.SendIOVar{
		PlanID: planID, VarID: id, Value: value,
	})
	return err.ToError()
}
func (c *HubWorkerClient) GetStream(ctx context.Context, planID exec.PlanID, streamID exec.VarID, signalID exec.VarID, signal exec.VarValue) (io.ReadCloser, error) {
	resp, err := c.cli.GetIOStream(ctx, &hubrpc.GetIOStream{
		PlanID: planID, VarID: streamID, SignalID: signalID, Signal: signal,
	})
	if err != nil {
		return nil, err.ToError()
	}

	return io2.CounterCloser(resp.Stream, func(cnt int64, err error) {
		if stgglb.Stats.HubTransfer != nil {
			stgglb.Stats.HubTransfer.RecordInput(c.hubID, cnt, err == nil || err == io.EOF)
		}
	}), nil
}
func (c *HubWorkerClient) GetVar(ctx context.Context, planID exec.PlanID, varID exec.VarID, signalID exec.VarID, signal exec.VarValue) (exec.VarValue, error) {
	resp, err := c.cli.GetIOVar(ctx, &hubrpc.GetIOVar{
		PlanID: planID, VarID: varID, SignalID: signalID, Signal: signal,
	})
	if err != nil {
		return nil, err.ToError()
	}
	return resp.Value, nil
}
func (c *HubWorkerClient) Close() error {
	c.cli.Release()
	return nil
}