package service

import (
	"strings"
	"testing"

	"browser.local/platform/domain"
)

func TestCoreServiceRunJobLifecycle(t *testing.T) {
	svc, sessionToken := newRegisteredRunJobService(t)
	createQueuedRunJob(t, svc, "job-1", "idem-1")

	claim, err := svc.ClaimRunJob(domain.RunJobClaim{
		RunEndpointID: "run-local",
		SessionToken:  sessionToken,
		Capabilities:  []string{"process.start"},
		Capacity:      domain.RunCapacity{MaxJobs: 4},
	})
	if err != nil {
		t.Fatalf("claim job: %v", err)
	}
	if !claim.Accepted || !claim.HasJob || claim.Job.JobID != "job-1" || claim.Job.State != domain.JobStateAccepted {
		t.Fatalf("expected claimed job, got %+v", claim)
	}

	ack, err := svc.AckRunJob(domain.RunJobAck{
		RunEndpointID: "run-local",
		SessionToken:  sessionToken,
		JobID:         claim.Job.JobID,
		LeaseToken:    claim.Job.LeaseToken,
		Attempt:       claim.Job.Attempt,
		Message:       "starting",
	})
	if err != nil {
		t.Fatalf("ack job: %v", err)
	}
	if ack.Job.State != domain.JobStateRunning || ack.Job.Progress.Message != "starting" {
		t.Fatalf("expected running ack job, got %+v", ack)
	}

	progress, err := svc.UpdateRunJobProgress(domain.RunJobProgress{
		RunEndpointID: "run-local",
		SessionToken:  sessionToken,
		JobID:         claim.Job.JobID,
		LeaseToken:    claim.Job.LeaseToken,
		Attempt:       claim.Job.Attempt,
		Progress:      domain.RunJobProgressReport{Percent: 50, Message: "half"},
	})
	if err != nil {
		t.Fatalf("progress job: %v", err)
	}
	if progress.Job.Progress.Percent != 50 || progress.Job.Progress.Message != "half" {
		t.Fatalf("expected progress update, got %+v", progress)
	}

	result, err := svc.CompleteRunJob(domain.RunJobResult{
		RunEndpointID: "run-local",
		SessionToken:  sessionToken,
		JobID:         claim.Job.JobID,
		LeaseToken:    claim.Job.LeaseToken,
		Attempt:       claim.Job.Attempt,
		State:         domain.JobStateSucceeded,
		Progress:      domain.RunJobProgressReport{Percent: 100, Message: "done"},
		ResultRef:     "artifact://jobs/job-1/result",
		Message:       "done",
	})
	if err != nil {
		t.Fatalf("complete job: %v", err)
	}
	if result.Job.State != domain.JobStateSucceeded || result.Job.ResultRef != "artifact://jobs/job-1/result" {
		t.Fatalf("expected succeeded result, got %+v", result)
	}

	stored, err := svc.GetJob("job-1")
	if err != nil {
		t.Fatalf("get completed job: %v", err)
	}
	if stored.State != domain.JobStateSucceeded || stored.Progress.Percent != 100 {
		t.Fatalf("expected stored terminal job, got %+v", stored)
	}
}

func TestCoreServiceRunJobClaimNoJob(t *testing.T) {
	svc, sessionToken := newRegisteredRunJobService(t)

	claim, err := svc.ClaimRunJob(domain.RunJobClaim{
		RunEndpointID: "run-local",
		SessionToken:  sessionToken,
		Capabilities:  []string{"process.start"},
		Capacity:      domain.RunCapacity{MaxJobs: 4},
	})
	if err != nil {
		t.Fatalf("claim no job: %v", err)
	}
	if !claim.Accepted || claim.HasJob || claim.Job != nil || claim.NextPollSeconds <= 0 {
		t.Fatalf("expected empty claim response, got %+v", claim)
	}
}

func TestCoreServiceRunJobClaimSkipsServerFileCapabilityWithoutDeclaration(t *testing.T) {
	svc := newTestCoreService()
	plugin, endpoint := createPluginAndRunEndpoint(t, svc)
	instance, err := svc.CreateServerInstance(domain.ServerInstance{
		ID:            "server-file-claim",
		PluginID:      plugin.ID,
		RunEndpointID: endpoint.ID,
		Name:          "File Claim Server",
		State:         domain.ServerInstanceStateRunning,
	})
	if err != nil {
		t.Fatalf("create server instance: %v", err)
	}
	helloRequest := validRunControlHello()
	helloRequest.CapabilityReport.Capabilities = []string{"control.hello", "control.heartbeat", "process.start"}
	helloRequest.CapabilityReport.Fingerprint = "cap-file-claim-no-list"
	hello, err := svc.RegisterRunHello(helloRequest)
	if err != nil {
		t.Fatalf("register run hello: %v", err)
	}
	_, err = svc.CreateJob(domain.Job{
		ID:               "job-file-list",
		ServerInstanceID: instance.ID,
		RunEndpointID:    endpoint.ID,
		Capability:       domain.JobCapabilityFilesList,
		TargetKey:        "server-root",
		IdempotencyKey:   "idem-file-list",
	})
	if err != nil {
		t.Fatalf("create file list job: %v", err)
	}

	claim, err := svc.ClaimRunJob(domain.RunJobClaim{
		RunEndpointID: endpoint.ID,
		SessionToken:  hello.SessionToken,
		Capabilities:  []string{"process.start"},
		Capacity:      domain.RunCapacity{MaxJobs: 4},
	})
	if err != nil {
		t.Fatalf("claim file list job: %v", err)
	}
	if !claim.Accepted || claim.HasJob || claim.Job != nil || claim.NextPollSeconds <= 0 {
		t.Fatalf("expected unsupported file job to remain queued, got %+v", claim)
	}
	jobs, err := svc.store.Jobs().List(domain.JobFilter{RunEndpointID: endpoint.ID})
	if err != nil || len(jobs) != 1 || jobs[0].State != domain.JobStateQueued {
		t.Fatalf("expected unsupported file job to remain queued in storage, jobs=%+v err=%v", jobs, err)
	}
}

func TestCoreServiceRunJobRejectsInvalidSessionAndLease(t *testing.T) {
	svc, sessionToken := newRegisteredRunJobService(t)
	createQueuedRunJob(t, svc, "job-1", "idem-1")

	_, err := svc.ClaimRunJob(domain.RunJobClaim{RunEndpointID: "run-local", SessionToken: "stale", Capacity: domain.RunCapacity{MaxJobs: 4}})
	if err == nil || !strings.Contains(err.Error(), "sessionToken") {
		t.Fatalf("expected invalid session rejection, got %v", err)
	}

	claim, err := svc.ClaimRunJob(domain.RunJobClaim{RunEndpointID: "run-local", SessionToken: sessionToken, Capacity: domain.RunCapacity{MaxJobs: 4}})
	if err != nil {
		t.Fatalf("claim job: %v", err)
	}
	_, err = svc.UpdateRunJobProgress(domain.RunJobProgress{
		RunEndpointID: "run-local",
		SessionToken:  sessionToken,
		JobID:         claim.Job.JobID,
		LeaseToken:    "bad-lease",
		Attempt:       claim.Job.Attempt,
		Progress:      domain.RunJobProgressReport{Percent: 10},
	})
	if err == nil || !strings.Contains(err.Error(), "leaseToken") {
		t.Fatalf("expected invalid lease rejection, got %v", err)
	}
}

func TestCoreServiceRunJobRejectsInvalidProgress(t *testing.T) {
	svc, sessionToken := newRegisteredRunJobService(t)
	createQueuedRunJob(t, svc, "job-1", "idem-1")
	claim, err := svc.ClaimRunJob(domain.RunJobClaim{RunEndpointID: "run-local", SessionToken: sessionToken, Capacity: domain.RunCapacity{MaxJobs: 4}})
	if err != nil {
		t.Fatalf("claim job: %v", err)
	}

	_, err = svc.UpdateRunJobProgress(domain.RunJobProgress{
		RunEndpointID: "run-local",
		SessionToken:  sessionToken,
		JobID:         claim.Job.JobID,
		LeaseToken:    claim.Job.LeaseToken,
		Attempt:       claim.Job.Attempt,
		Progress:      domain.RunJobProgressReport{Percent: 101},
	})
	if err == nil || !strings.Contains(err.Error(), "progress.percent") {
		t.Fatalf("expected invalid progress rejection, got %v", err)
	}
}

func TestCoreServiceRunJobCancelPoll(t *testing.T) {
	svc, sessionToken := newRegisteredRunJobService(t)
	createQueuedRunJob(t, svc, "job-1", "idem-1")
	claim, err := svc.ClaimRunJob(domain.RunJobClaim{RunEndpointID: "run-local", SessionToken: sessionToken, Capacity: domain.RunCapacity{MaxJobs: 4}})
	if err != nil {
		t.Fatalf("claim job: %v", err)
	}
	if _, err := svc.AckRunJob(domain.RunJobAck{RunEndpointID: "run-local", SessionToken: sessionToken, JobID: claim.Job.JobID, LeaseToken: claim.Job.LeaseToken, Attempt: claim.Job.Attempt}); err != nil {
		t.Fatalf("ack job: %v", err)
	}

	cancel, err := svc.RequestRunJobCancel(domain.RunJobCancelRequest{JobID: "job-1", Reason: "operator requested"})
	if err != nil {
		t.Fatalf("request cancel: %v", err)
	}
	if !cancel.Accepted || cancel.Reason != "operator requested" {
		t.Fatalf("unexpected cancel request: %+v", cancel)
	}

	poll, err := svc.PollRunJobCancel(domain.RunJobCancelPoll{RunEndpointID: "run-local", SessionToken: sessionToken, JobID: "job-1", LeaseToken: claim.Job.LeaseToken, Attempt: claim.Job.Attempt})
	if err != nil {
		t.Fatalf("poll cancel: %v", err)
	}
	if !poll.HasCancel || poll.JobID != "job-1" || poll.Reason != "operator requested" {
		t.Fatalf("expected cancel poll result, got %+v", poll)
	}
}

func TestCoreServiceRunJobTerminalResultIsIdempotent(t *testing.T) {
	svc, sessionToken := newRegisteredRunJobService(t)
	createQueuedRunJob(t, svc, "job-1", "idem-1")
	claim, err := svc.ClaimRunJob(domain.RunJobClaim{RunEndpointID: "run-local", SessionToken: sessionToken, Capacity: domain.RunCapacity{MaxJobs: 4}})
	if err != nil {
		t.Fatalf("claim job: %v", err)
	}

	request := domain.RunJobResult{
		RunEndpointID: "run-local",
		SessionToken:  sessionToken,
		JobID:         claim.Job.JobID,
		LeaseToken:    claim.Job.LeaseToken,
		Attempt:       claim.Job.Attempt,
		State:         domain.JobStateSucceeded,
		Progress:      domain.RunJobProgressReport{Percent: 100, Message: "done"},
		ResultRef:     "artifact://jobs/job-1/result",
		Message:       "done",
	}
	first, err := svc.CompleteRunJob(request)
	if err != nil {
		t.Fatalf("complete first: %v", err)
	}
	second, err := svc.CompleteRunJob(request)
	if err != nil {
		t.Fatalf("complete duplicate: %v", err)
	}
	if second.Job.State != first.Job.State || second.Job.ResultRef != first.Job.ResultRef {
		t.Fatalf("expected duplicate result to be idempotent, got %+v %+v", first, second)
	}

	request.State = domain.JobStateFailed
	request.Message = "failed"
	_, err = svc.CompleteRunJob(request)
	if err == nil || !strings.Contains(err.Error(), "conflicts") {
		t.Fatalf("expected conflicting result rejection, got %v", err)
	}
}

func TestCoreServiceRunJobReconcile(t *testing.T) {
	svc, sessionToken := newRegisteredRunJobService(t)
	createQueuedRunJob(t, svc, "job-1", "idem-1")
	claim, err := svc.ClaimRunJob(domain.RunJobClaim{RunEndpointID: "run-local", SessionToken: sessionToken, Capacity: domain.RunCapacity{MaxJobs: 4}})
	if err != nil {
		t.Fatalf("claim job: %v", err)
	}
	if _, err := svc.AckRunJob(domain.RunJobAck{RunEndpointID: "run-local", SessionToken: sessionToken, JobID: claim.Job.JobID, LeaseToken: claim.Job.LeaseToken, Attempt: claim.Job.Attempt}); err != nil {
		t.Fatalf("ack job: %v", err)
	}

	reconcile, err := svc.ReconcileRunJobs(domain.RunJobReconcile{RunEndpointID: "run-local", SessionToken: sessionToken, ActiveJobs: []domain.RunJobReconcileEntry{
		{JobID: "job-1", LeaseToken: claim.Job.LeaseToken, Attempt: claim.Job.Attempt},
		{JobID: "local-only", LeaseToken: "local-lease", Attempt: 1},
	}})
	if err != nil {
		t.Fatalf("reconcile jobs: %v", err)
	}
	if len(reconcile.ConfirmedJobs) != 1 || reconcile.ConfirmedJobs[0].JobID != "job-1" {
		t.Fatalf("expected platform active job, got %+v", reconcile)
	}
	if len(reconcile.DiscardJobIDs) != 1 || reconcile.DiscardJobIDs[0] != "local-only" {
		t.Fatalf("expected unknown local job, got %+v", reconcile.DiscardJobIDs)
	}
}

func newRegisteredRunJobService(t *testing.T) (*CoreService, string) {
	t.Helper()
	svc := newTestCoreService()
	helloRequest := validRunControlHello()
	helloRequest.CapabilityReport.Capabilities = append(helloRequest.CapabilityReport.Capabilities, "process.start")
	helloRequest.CapabilityReport.Fingerprint = "cap-jobs"
	hello, err := svc.RegisterRunHello(helloRequest)
	if err != nil {
		t.Fatalf("register run hello: %v", err)
	}
	return svc, hello.SessionToken
}

func createQueuedRunJob(t *testing.T, svc *CoreService, id string, idempotencyKey string) domain.Job {
	t.Helper()
	job, err := svc.CreateJob(domain.Job{
		ID:             id,
		RunEndpointID:  "run-local",
		Capability:     "process.start",
		IdempotencyKey: idempotencyKey,
	})
	if err != nil {
		t.Fatalf("create queued job: %v", err)
	}
	return job
}