package orbit

import (
	"context"
	"encoding/json"
	"errors"
	"reflect"
	"testing"
	"time"
)

func TestIntegrationWorkerRuntimePriority(t *testing.T) {
	api, _, _ := integrationWorkerClient(t)
	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
	defer cancel()
	name := "priority." + workerTestID(t)
	q, err := api.CreateQueue(ctx, name, CreateQueueRequest{Name: name, MaxConcurrency: 1, RatePerSecond: 100})
	if err != nil {
		t.Fatal(err)
	}
	base := map[string]any{"queue_id": q.Queue.ID, "handler": name, "handler_version": "v1", "payload_version": "v1", "payload": map[string]any{}}
	for _, invalid := range []any{-1, 10, 1.5, nil, "9", true} {
		base["priority"] = invalid
		var ignored SubmitTaskResult
		err := api.call(ctx, "POST", "/v1/tasks", workerTestID(t), base, &ignored)
		var rejected *APIError
		if !errors.As(err, &rejected) || rejected.StatusCode != 400 {
			t.Fatalf("invalid priority %v accepted: %v", invalid, err)
		}
	}
	var tasks []Task
	for _, priority := range []int16{0, 9, 4} {
		out, err := api.SubmitTask(ctx, workerTestID(t), SubmitTaskRequest{QueueID: q.Queue.ID, Handler: name, HandlerVersion: "v1", PayloadVersion: "v1", Payload: json.RawMessage(`{"n":9007199254740993}`), Priority: priority})
		if err != nil || out.Task.Priority != priority {
			t.Fatal("priority not accepted", err)
		}
		tasks = append(tasks, out.Task)
	}
	observed := make(chan int16, 3)
	w, err := NewWorker(api, WorkerOptions{QueueID: q.Queue.ID, Capacity: 1, Handlers: []WorkerHandler{runtimeHandler(name, func(ctx context.Context, e WorkerExecution) (json.RawMessage, error) {
		observed <- e.Task.Priority
		return e.Task.Payload, nil
	})}})
	if err != nil {
		t.Fatal(err)
	}
	run, stop := context.WithCancel(ctx)
	done := make(chan error, 1)
	go func() { done <- w.Run(run) }()
	defer func() {
		stop()
		if err := <-done; err != nil {
			t.Error(err)
		}
	}()
	for _, task := range tasks {
		v := waitRuntimeState(t, ctx, api, task.ID, TaskSucceeded)
		if v.Priority != task.Priority {
			t.Fatal("priority changed")
		}
	}
	got := []int16{<-observed, <-observed, <-observed}
	if !reflect.DeepEqual(got, []int16{9, 4, 0}) {
		t.Fatalf("dispatch priorities %v", got)
	}
}

func TestIntegrationWorkerProcessPriorityRecovery(t *testing.T) {
	a := startOrbitProcess(t)
	_, _, token := integrationWorkerClient(t)
	api := processClient(t, a, token)
	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
	defer cancel()
	name := "priority-crash." + workerTestID(t)
	q, err := api.CreateQueue(ctx, name, CreateQueueRequest{Name: name, MaxConcurrency: 1, RatePerSecond: 100})
	if err != nil {
		t.Fatal(err)
	}
	for _, p := range []int16{0, 9, 4} {
		if _, err := api.SubmitTask(ctx, workerTestID(t), SubmitTaskRequest{QueueID: q.Queue.ID, Handler: name, HandlerVersion: "v1", PayloadVersion: "v1", Payload: json.RawMessage(`{}`), Priority: p}); err != nil {
			t.Fatal(err)
		}
	}
	a.kill(t)
	b := startOrbitProcess(t)
	if a.nodeID == b.nodeID {
		t.Fatal("node id reused")
	}
	api = processClient(t, b, token)
	r, err := NewWorkerRegistration(q.Queue.ID, 1, []WorkerCapability{{Handler: name, HandlerVersion: "v1", PayloadVersion: "v1"}})
	if err != nil {
		t.Fatal(err)
	}
	w, err := api.DialWorker(ctx, r)
	if err != nil {
		t.Fatal(err)
	}
	defer w.Close()
	if _, err = w.Capacity(ctx, workerTestID(t), WorkerCapacity{Sequence: 1, Capacity: 1}); err != nil {
		t.Fatal(err)
	}
	for _, want := range []int16{9, 4, 0} {
		a, err := w.NextAssignment(ctx)
		if err != nil || a.Task.Priority != want {
			t.Fatal("restart lost frozen dispatch order", err)
		}
		if _, err = w.Start(ctx, workerTestID(t), a.Attempt()); err != nil {
			t.Fatal(err)
		}
		if _, err = w.Finish(ctx, workerTestID(t), WorkerFinish{Ref: a.Attempt(), Outcome: WorkerSucceeded, Result: json.RawMessage(`{}`)}); err != nil {
			t.Fatal(err)
		}
	}
}