//go:build integration

package storage

import (
	"context"
	"database/sql"
	"testing"

	"training-tracker/internal/models"
)

func TestExerciseRepository_CRUD(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test")
	}

	tdb := setupTestDB(t)
	defer tdb.cleanup(t)

	repo := NewExerciseRepository(tdb.DB)
	ctx := context.Background()

	t.Run("List_empty", func(t *testing.T) {
		tdb.truncateTables(t)

		exercises, err := repo.List(ctx)
		if err != nil {
			t.Fatalf("List failed: %v", err)
		}
		if exercises != nil && len(exercises) != 0 {
			t.Errorf("expected empty list, got %d items", len(exercises))
		}
	})

	t.Run("Create_strength", func(t *testing.T) {
		tdb.truncateTables(t)

		req := &models.CreateExerciseRequest{
			Name:        "Bench Press",
			Type:        models.ExerciseTypeStrength,
			MuscleGroup: "Chest",
			Description: "Barbell bench press",
		}

		exercise, err := repo.Create(ctx, req)
		if err != nil {
			t.Fatalf("Create failed: %v", err)
		}

		if exercise.ID == 0 {
			t.Error("expected non-zero ID")
		}
		if exercise.Name != req.Name {
			t.Errorf("name = %q, want %q", exercise.Name, req.Name)
		}
		if exercise.Type != req.Type {
			t.Errorf("type = %q, want %q", exercise.Type, req.Type)
		}
		if exercise.MuscleGroup != req.MuscleGroup {
			t.Errorf("muscle_group = %q, want %q", exercise.MuscleGroup, req.MuscleGroup)
		}
		if exercise.Description != req.Description {
			t.Errorf("description = %q, want %q", exercise.Description, req.Description)
		}
		if exercise.CreatedAt.IsZero() {
			t.Error("expected non-zero created_at")
		}
	})

	t.Run("Create_cardio", func(t *testing.T) {
		tdb.truncateTables(t)

		req := &models.CreateExerciseRequest{
			Name: "Running",
			Type: models.ExerciseTypeCardio,
		}

		exercise, err := repo.Create(ctx, req)
		if err != nil {
			t.Fatalf("Create failed: %v", err)
		}

		if exercise.Type != models.ExerciseTypeCardio {
			t.Errorf("type = %q, want %q", exercise.Type, models.ExerciseTypeCardio)
		}
		if exercise.MuscleGroup != "" {
			t.Errorf("expected empty muscle_group, got %q", exercise.MuscleGroup)
		}
	})

	t.Run("GetByID_found", func(t *testing.T) {
		tdb.truncateTables(t)

		created, _ := repo.Create(ctx, &models.CreateExerciseRequest{
			Name: "Squat",
			Type: models.ExerciseTypeStrength,
		})

		exercise, err := repo.GetByID(ctx, created.ID)
		if err != nil {
			t.Fatalf("GetByID failed: %v", err)
		}
		if exercise == nil {
			t.Fatal("expected exercise, got nil")
		}
		if exercise.ID != created.ID {
			t.Errorf("ID = %d, want %d", exercise.ID, created.ID)
		}
		if exercise.Name != "Squat" {
			t.Errorf("name = %q, want %q", exercise.Name, "Squat")
		}
	})

	t.Run("GetByID_not_found", func(t *testing.T) {
		tdb.truncateTables(t)

		exercise, err := repo.GetByID(ctx, 99999)
		if err != nil {
			t.Fatalf("GetByID failed: %v", err)
		}
		if exercise != nil {
			t.Errorf("expected nil, got %+v", exercise)
		}
	})

	t.Run("Update_found", func(t *testing.T) {
		tdb.truncateTables(t)

		created, _ := repo.Create(ctx, &models.CreateExerciseRequest{
			Name: "Old Name",
			Type: models.ExerciseTypeStrength,
		})

		updated, err := repo.Update(ctx, created.ID, &models.CreateExerciseRequest{
			Name:        "New Name",
			Type:        models.ExerciseTypeCardio,
			MuscleGroup: "Legs",
			Description: "Updated description",
		})
		if err != nil {
			t.Fatalf("Update failed: %v", err)
		}
		if updated == nil {
			t.Fatal("expected updated exercise, got nil")
		}
		if updated.Name != "New Name" {
			t.Errorf("name = %q, want %q", updated.Name, "New Name")
		}
		if updated.Type != models.ExerciseTypeCardio {
			t.Errorf("type = %q, want %q", updated.Type, models.ExerciseTypeCardio)
		}
		if updated.MuscleGroup != "Legs" {
			t.Errorf("muscle_group = %q, want %q", updated.MuscleGroup, "Legs")
		}
	})

	t.Run("Update_not_found", func(t *testing.T) {
		tdb.truncateTables(t)

		updated, err := repo.Update(ctx, 99999, &models.CreateExerciseRequest{
			Name: "Test",
			Type: models.ExerciseTypeStrength,
		})
		if err != nil {
			t.Fatalf("Update failed: %v", err)
		}
		if updated != nil {
			t.Errorf("expected nil, got %+v", updated)
		}
	})

	t.Run("Delete_found", func(t *testing.T) {
		tdb.truncateTables(t)

		created, _ := repo.Create(ctx, &models.CreateExerciseRequest{
			Name: "To Delete",
			Type: models.ExerciseTypeStrength,
		})

		err := repo.Delete(ctx, created.ID)
		if err != nil {
			t.Fatalf("Delete failed: %v", err)
		}

		exercise, _ := repo.GetByID(ctx, created.ID)
		if exercise != nil {
			t.Error("expected exercise to be deleted")
		}
	})

	t.Run("Delete_not_found", func(t *testing.T) {
		tdb.truncateTables(t)

		err := repo.Delete(ctx, 99999)
		if err != sql.ErrNoRows {
			t.Errorf("expected sql.ErrNoRows, got %v", err)
		}
	})

	t.Run("List_multiple", func(t *testing.T) {
		tdb.truncateTables(t)

		repo.Create(ctx, &models.CreateExerciseRequest{Name: "Alpha", Type: models.ExerciseTypeStrength})
		repo.Create(ctx, &models.CreateExerciseRequest{Name: "Beta", Type: models.ExerciseTypeCardio})
		repo.Create(ctx, &models.CreateExerciseRequest{Name: "Gamma", Type: models.ExerciseTypeStrength})

		exercises, err := repo.List(ctx)
		if err != nil {
			t.Fatalf("List failed: %v", err)
		}
		if len(exercises) != 3 {
			t.Errorf("len = %d, want 3", len(exercises))
		}
		// Results are ordered by name
		if exercises[0].Name != "Alpha" {
			t.Errorf("first exercise = %q, want Alpha", exercises[0].Name)
		}
	})

	t.Run("Update_clear_optional_fields", func(t *testing.T) {
		tdb.truncateTables(t)

		created, _ := repo.Create(ctx, &models.CreateExerciseRequest{
			Name:        "With Optional",
			Type:        models.ExerciseTypeStrength,
			MuscleGroup: "Arms",
			Description: "Has description",
		})

		updated, err := repo.Update(ctx, created.ID, &models.CreateExerciseRequest{
			Name: "Without Optional",
			Type: models.ExerciseTypeStrength,
		})
		if err != nil {
			t.Fatalf("Update failed: %v", err)
		}
		if updated.MuscleGroup != "" {
			t.Errorf("expected empty muscle_group, got %q", updated.MuscleGroup)
		}
		if updated.Description != "" {
			t.Errorf("expected empty description, got %q", updated.Description)
		}
	})
}