package repository

import (
	"errors"
	"testing"
	"time"

	"github.com/vaultdrop/backend/dbtest"
)

func newTestRepo(t *testing.T) *Repository {
	t.Helper()
	conn := dbtest.OpenTestDatabase(t, repositoryTestURL)
	return NewRepository(conn)
}

func seedOcrJobFixture(t *testing.T) (*Repository, string, string, string) {
	t.Helper()
	repo := newTestRepo(t)
	userID, err := repo.Users.Create("ocr-user", "ocr-user", "hash", false)
	if err != nil {
		t.Fatalf("create user: %v", err)
	}
	deviceID := NewID()
	if err := repo.Devices.Upsert(deviceID); err != nil {
		t.Fatalf("register device: %v", err)
	}
	fileID := NewID()
	if err := repo.Resources.InsertFile(userID, fileID, "scan.png", "", 10, nil, nil); err != nil {
		t.Fatalf("insert file: %v", err)
	}
	return repo, userID, deviceID, fileID
}

func TestOcrJobsLifecycleTransitions(t *testing.T) {
	repo, _, deviceID, fileID := seedOcrJobFixture(t)
	jobID := NewID()

	if err := repo.OcrJobs.Create(jobID, deviceID, fileID); err != nil {
		t.Fatalf("create: %v", err)
	}
	row, err := repo.OcrJobs.Get(deviceID, jobID)
	if err != nil || row.Status != "queued" {
		t.Fatalf("get (queued): %+v err=%v", row, err)
	}

	if err := repo.OcrJobs.TouchProcessing(deviceID, jobID); err != nil {
		t.Fatalf("touch processing: %v", err)
	}
	row, _ = repo.OcrJobs.Get(deviceID, jobID)
	if row.Status != "processing" {
		t.Errorf("status attendu processing, got %q", row.Status)
	}

	if err := repo.OcrJobs.Complete(deviceID, jobID, "HELLO"); err != nil {
		t.Fatalf("complete: %v", err)
	}
	row, _ = repo.OcrJobs.Get(deviceID, jobID)
	if row.Status != "done" || row.Text == nil || *row.Text != "HELLO" {
		t.Errorf("after complete: %+v", row)
	}
}

func TestOcrJobsFail(t *testing.T) {
	repo, _, deviceID, fileID := seedOcrJobFixture(t)
	jobID := NewID()
	if err := repo.OcrJobs.Create(jobID, deviceID, fileID); err != nil {
		t.Fatalf("create: %v", err)
	}
	if err := repo.OcrJobs.Fail(deviceID, jobID, "tesseract exploded"); err != nil {
		t.Fatalf("fail: %v", err)
	}
	row, err := repo.OcrJobs.Get(deviceID, jobID)
	if err != nil || row.Status != "failed" || row.Error == nil || *row.Error != "tesseract exploded" {
		t.Errorf("après fail : %+v err=%v", row, err)
	}
}

func TestOcrJobsGetScopedByDevice(t *testing.T) {
	repo, _, deviceID, fileID := seedOcrJobFixture(t)
	jobID := NewID()
	if err := repo.OcrJobs.Create(jobID, deviceID, fileID); err != nil {
		t.Fatalf("create: %v", err)
	}

	otherDevice := NewID()
	if err := repo.Devices.Upsert(otherDevice); err != nil {
		t.Fatalf("register other device: %v", err)
	}
	if _, err := repo.OcrJobs.Get(otherDevice, jobID); !errors.Is(err, ErrJobNotFound) {
		t.Errorf("get par un autre device : attendu ErrJobNotFound, got %v", err)
	}
}

func TestOcrJobsClaimNextFifo(t *testing.T) {
	repo, _, deviceID, fileID := seedOcrJobFixture(t)
	var jobIDs []string
	for i := 0; i < 3; i++ {
		jobID := NewID()
		if err := repo.OcrJobs.Create(jobID, deviceID, fileID); err != nil {
			t.Fatalf("create %d: %v", i, err)
		}
		jobIDs = append(jobIDs, jobID)
	}

	for i, want := range jobIDs {
		row, err := repo.OcrJobs.ClaimNext()
		if err != nil {
			t.Fatalf("claim %d: %v", i, err)
		}
		if row.ID != want {
			t.Errorf("claim %d = %q, attendu %q (FIFO)", i, row.ID, want)
		}
		if row.Status != "processing" {
			t.Errorf("claim %d status = %q, attendu processing", i, row.Status)
		}
	}

	if _, err := repo.OcrJobs.ClaimNext(); !errors.Is(err, ErrNoQueuedJobs) {
		t.Errorf("queue vide : attendu ErrNoQueuedJobs, got %v", err)
	}
}

func TestOcrJobsClaimNextSkipsProcessingAndDone(t *testing.T) {
	repo, _, deviceID, fileID := seedOcrJobFixture(t)
	job1 := NewID()
	job2 := NewID()
	if err := repo.OcrJobs.Create(job1, deviceID, fileID); err != nil {
		t.Fatalf("create job1: %v", err)
	}
	if err := repo.OcrJobs.Create(job2, deviceID, fileID); err != nil {
		t.Fatalf("create job2: %v", err)
	}
	if err := repo.OcrJobs.TouchProcessing(deviceID, job2); err != nil {
		t.Fatalf("touch job2 processing: %v", err)
	}

	row, err := repo.OcrJobs.ClaimNext()
	if err != nil {
		t.Fatalf("claim: %v", err)
	}
	if row.ID != job1 {
		t.Errorf("claim = %q, attendu job1 %q", row.ID, job1)
	}
}

func TestOcrJobsResetStaleProcessing(t *testing.T) {
	repo, _, deviceID, fileID := seedOcrJobFixture(t)
	jobID := NewID()
	if err := repo.OcrJobs.Create(jobID, deviceID, fileID); err != nil {
		t.Fatalf("create: %v", err)
	}
	if err := repo.OcrJobs.TouchProcessing(deviceID, jobID); err != nil {
		t.Fatalf("touch processing: %v", err)
	}

	// Started_at = NOW : pas encore stale → aucun requeue.
	if n, err := repo.OcrJobs.ResetStaleProcessing(time.Minute); err != nil {
		t.Fatalf("reset: %v", err)
	} else if n != 0 {
		t.Errorf("reset récent : attendu 0, got %d", n)
	}

	// Vieillit le started_at puis re-reset → 1 requeue.
	if _, err := repo.OcrJobs.DB.Exec(`UPDATE ocr_jobs SET started_at = NOW() - interval '2 minutes' WHERE job_id = $1`, jobID); err != nil {
		t.Fatalf("vieillir started_at: %v", err)
	}
	if n, err := repo.OcrJobs.ResetStaleProcessing(time.Minute); err != nil {
		t.Fatalf("reset stale: %v", err)
	} else if n != 1 {
		t.Errorf("reset stale : attendu 1, got %d", n)
	}

	row, err := repo.OcrJobs.Get(deviceID, jobID)
	if err != nil {
		t.Fatalf("get: %v", err)
	}
	if row.Status != "queued" {
		t.Errorf("status après reset = %q, attendu queued", row.Status)
	}
}