// Package actor provides database access for the Actor resource.
package actor

import (
	"context"
	"database/sql"
	"fmt"
	"strings"
	"testing"
	"time"

	v1 "git.tipsy.codes/charles/webstory/pkg/api/webstory/v1"
	"git.tipsy.codes/charles/webstory/pkg/database/schema"

	story "git.tipsy.codes/charles/webstory/pkg/database/story"
	embeddedpostgres "github.com/fergusstrange/embedded-postgres"
	"google.golang.org/protobuf/types/known/timestamppb"
)

func TestActorTranslator_FromAPI(t *testing.T) {
	now := time.Now()
	tests := []struct {
		name      string
		apiActor  *v1.Actor
		expectErr bool
		errMsg    string
		expectID  int64
		checkFunc func(*DBActor) error
	}{
		{
			name:      "nil actor returns error",
			apiActor:  nil,
			expectErr: true,
			errMsg:    "api actor cannot be nil",
		},
		{
			name: "minimal valid actor creates translator correctly",
			apiActor: &v1.Actor{
				ActorId:    "actor-1",
				NameValue:  "John Doe",
				Role:       "Hero",
				Notes:      "Main character",
				CreateTime: timestamppb.New(now),
				UpdateTime: timestamppb.New(now),
			},
			expectErr: false,
			expectID:  0,
			checkFunc: func(s *DBActor) error {
				if s.ActorID != "actor-1" {
					return fmt.Errorf("expected ActorID actor-1, got %s", s.ActorID)
				}
				if s.NameValue != "John Doe" {
					return fmt.Errorf("expected NameValue John Doe, got %s", s.NameValue)
				}
				if s.Role != "Hero" {
					return fmt.Errorf("expected Role Hero, got %s", s.Role)
				}
				if s.Notes != "Main character" {
					return fmt.Errorf("expected Notes Main character, got %s", s.Notes)
				}
				return nil
			},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			trans := NewActorTranslator()
			result, err := trans.FromAPI(tt.apiActor)

			if tt.expectErr {
				if err == nil {
					t.Fatalf("expected error but got nil")
				}
				if tt.errMsg != "" && !strings.Contains(err.Error(), tt.errMsg) {
					t.Errorf("expected error containing '%s' but got '%s'", tt.errMsg, err.Error())
				}
				return
			}

			if err != nil {
				t.Fatalf("unexpected error: %v", err)
			}

			if result == nil {
				t.Fatalf("expected non-nil result")
			}

			if result.ID != tt.expectID {
				t.Errorf("expected ID %d but got %d", tt.expectID, result.ID)
			}

			if tt.checkFunc != nil {
				if err := tt.checkFunc(result); err != nil {
					t.Errorf("check failed: %v", err)
				}
			}
		})
	}
}

func TestActorTranslator_ToAPI(t *testing.T) {
	now := time.Now()
	tests := []struct {
		name      string
		dbActor   *DBActor
		checkFunc func(*v1.Actor) error
	}{
		{
			name:    "nil dbActor returns nil",
			dbActor: nil,
			checkFunc: func(a *v1.Actor) error {
				if a != nil {
					return fmt.Errorf("expected nil, got %v", a)
				}
				return nil
			},
		},
		{
			name: "minimal dbActor converts correctly",
			dbActor: &DBActor{
				ID:        1,
				StoryID:   100,
				ActorID:   "actor-1",
				NameValue: "John Doe",
				Role:      "Hero",
				Notes:     "Main character",
				CreatedAt: now,
				UpdatedAt: now,
				Etag:      "etag-123",
			},
			checkFunc: func(a *v1.Actor) error {
				if a.ActorId != "actor-1" {
					return fmt.Errorf("expected ActorId actor-1, got %s", a.ActorId)
				}
				if a.NameValue != "John Doe" {
					return fmt.Errorf("expected NameValue John Doe, got %s", a.NameValue)
				}
				if a.Role != "Hero" {
					return fmt.Errorf("expected Role Hero, got %s", a.Role)
				}
				if a.Notes != "Main character" {
					return fmt.Errorf("expected Notes Main character, got %s", a.Notes)
				}
				return nil
			},
		},
		{
			name: "dbActor with story_id and actor_id creates correct name",
			dbActor: &DBActor{
				ID:        2,
				StoryID:   200,
				ActorID:   "actor-2",
				NameValue: "Jane Smith",
				CreatedAt: now,
				UpdatedAt: now,
			},
			checkFunc: func(a *v1.Actor) error {
				if a.Name != "stories/200/actors/actor-2" {
					return fmt.Errorf("expected name stories/200/actors/actor-2, got %s", a.Name)
				}
				if a.ActorId != "actor-2" {
					return fmt.Errorf("expected ActorId actor-2, got %s", a.ActorId)
				}
				return nil
			},
		},
		{
			name: "dbActor with zero story_id does not create name",
			dbActor: &DBActor{
				ID:        3,
				StoryID:   0,
				ActorID:   "actor-3",
				NameValue: "Test Actor",
				CreatedAt: now,
				UpdatedAt: now,
			},
			checkFunc: func(a *v1.Actor) error {
				if a.Name != "" {
					return fmt.Errorf("expected empty name, got %s", a.Name)
				}
				return nil
			},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			trans := NewActorTranslator()
			result := trans.ToAPI(tt.dbActor)

			if tt.checkFunc != nil {
				if err := tt.checkFunc(result); err != nil {
					t.Errorf("check failed: %v", err)
				}
			}
		})
	}
}

func TestDBActor_Save(t *testing.T) {
	server := embeddedpostgres.NewDatabase(embeddedpostgres.DefaultConfig().Port(5432))
	err := server.Start()
	if err != nil {
		t.Fatalf("failed to start embedded postgres: %v", err)
	}
	defer func() {
		if err := server.Stop(); err != nil {
			t.Errorf("failed to stop embedded postgres: %v", err)
		}
	}()

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	db, err := sql.Open("postgres", "postgres://postgres:postgres@127.0.0.1:5432/postgres?sslmode=disable")
	if err != nil {
		t.Fatalf("failed to connect to database: %v", err)
	}
	defer db.Close()

	_, err = db.ExecContext(ctx, string(schema.Bytes))
	if err != nil {
		t.Fatalf("failed to run schema: %v", err)
	}

	// Create a story first
	story := &story.DBStory{
		StoryID: "save-test-story-1",
		Title:   "Save Test Story",
	}
	err = story.Save(db)
	if err != nil {
		t.Fatalf("failed to save story: %v", err)
	}

	actor := &DBActor{
		StoryID:   story.ID,
		ActorID:   "save-test-1",
		NameValue: "Save Test",
		Role:      "Test Role",
		Notes:     "Test notes",
	}

	err = actor.Save(db)
	if err != nil {
		t.Fatalf("Save failed: %v", err)
	}

	if actor.ID <= 0 {
		t.Errorf("expected positive ID, got %d", actor.ID)
	}

	var dbActor DBActor
	err = db.QueryRow(
		`SELECT id, story_id, actor_id, name_value, role, notes, created_at, updated_at, etag FROM actors WHERE id = $1`,
		actor.ID,
	).Scan(
		&dbActor.ID, &dbActor.StoryID, &dbActor.ActorID, &dbActor.NameValue,
		&dbActor.Role, &dbActor.Notes, &dbActor.CreatedAt, &dbActor.UpdatedAt, &dbActor.Etag,
	)
	if err != nil {
		t.Fatalf("failed to query actor: %v", err)
	}

	if dbActor.ActorID != actor.ActorID {
		t.Errorf("actor_id mismatch: expected %s, got %s", actor.ActorID, dbActor.ActorID)
	}
	if dbActor.NameValue != actor.NameValue {
		t.Errorf("name_value mismatch: expected %s, got %s", actor.NameValue, dbActor.NameValue)
	}
	if dbActor.Role != actor.Role {
		t.Errorf("role mismatch: expected %s, got %s", actor.Role, dbActor.Role)
	}
	if dbActor.Notes != actor.Notes {
		t.Errorf("notes mismatch: expected %s, got %s", actor.Notes, dbActor.Notes)
	}
}

func TestDBActor_GetByID(t *testing.T) {
	server := embeddedpostgres.NewDatabase(embeddedpostgres.DefaultConfig().Port(5432))
	err := server.Start()
	if err != nil {
		t.Fatalf("failed to start embedded postgres: %v", err)
	}
	defer func() {
		if err := server.Stop(); err != nil {
			t.Errorf("failed to stop embedded postgres: %v", err)
		}
	}()

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	db, err := sql.Open("postgres", "postgres://postgres:postgres@127.0.0.1:5432/postgres?sslmode=disable")
	if err != nil {
		t.Fatalf("failed to connect to database: %v", err)
	}
	defer db.Close()

	_, err = db.ExecContext(ctx, string(schema.Bytes))
	if err != nil {
		t.Fatalf("failed to run schema: %v", err)
	}

	// Create a story first
	story := &story.DBStory{
		StoryID: "get-by-id-story-1",
		Title:   "Get By ID Story",
	}
	err = story.Save(db)
	if err != nil {
		t.Fatalf("failed to save story: %v", err)
	}

	actor := &DBActor{
		StoryID:   story.ID,
		ActorID:   "get-by-id-test-1",
		NameValue: "Get Test",
	}
	err = actor.Save(db)
	if err != nil {
		t.Fatalf("Save failed: %v", err)
	}

	result, err := GetByID(db, actor.ID)
	if err != nil {
		t.Fatalf("GetByID failed: %v", err)
	}

	if result.ID != actor.ID {
		t.Errorf("ID mismatch: expected %d, got %d", actor.ID, result.ID)
	}
	if result.NameValue != actor.NameValue {
		t.Errorf("name_value mismatch: expected %s, got %s", actor.NameValue, result.NameValue)
	}
}

func TestDBActor_GetByActorID(t *testing.T) {
	server := embeddedpostgres.NewDatabase(embeddedpostgres.DefaultConfig().Port(5432))
	err := server.Start()
	if err != nil {
		t.Fatalf("failed to start embedded postgres: %v", err)
	}
	defer func() {
		if err := server.Stop(); err != nil {
			t.Errorf("failed to stop embedded postgres: %v", err)
		}
	}()

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	db, err := sql.Open("postgres", "postgres://postgres:postgres@127.0.0.1:5432/postgres?sslmode=disable")
	if err != nil {
		t.Fatalf("failed to connect to database: %v", err)
	}
	defer db.Close()

	_, err = db.ExecContext(ctx, string(schema.Bytes))
	if err != nil {
		t.Fatalf("failed to run schema: %v", err)
	}

	// Create a story first
	story := &story.DBStory{
		StoryID: "get-by-actor-id-story-1",
		Title:   "Get By Actor ID Story",
	}
	err = story.Save(db)
	if err != nil {
		t.Fatalf("failed to save story: %v", err)
	}

	actor := &DBActor{
		StoryID:   story.ID,
		ActorID:   "get-by-actor-id-test-1",
		NameValue: "Get By Actor ID Test",
	}
	err = actor.Save(db)
	if err != nil {
		t.Fatalf("Save failed: %v", err)
	}

	result, err := GetByActorID(db, actor.StoryID, actor.ActorID)
	if err != nil {
		t.Fatalf("GetByActorID failed: %v", err)
	}

	if result.NameValue != actor.NameValue {
		t.Errorf("name_value mismatch: expected %s, got %s", actor.NameValue, result.NameValue)
	}
}

func TestDBActor_ListByStoryID(t *testing.T) {
	server := embeddedpostgres.NewDatabase(embeddedpostgres.DefaultConfig().Port(5432))
	err := server.Start()
	if err != nil {
		t.Fatalf("failed to start embedded postgres: %v", err)
	}
	defer func() {
		if err := server.Stop(); err != nil {
			t.Errorf("failed to stop embedded postgres: %v", err)
		}
	}()

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	db, err := sql.Open("postgres", "postgres://postgres:postgres@127.0.0.1:5432/postgres?sslmode=disable")
	if err != nil {
		t.Fatalf("failed to connect to database: %v", err)
	}
	defer db.Close()

	_, err = db.ExecContext(ctx, string(schema.Bytes))
	if err != nil {
		t.Fatalf("failed to run schema: %v", err)
	}

	// Create a story first
	story := &story.DBStory{
		StoryID: "list-test-story-1",
		Title:   "List Test Story",
	}
	err = story.Save(db)
	if err != nil {
		t.Fatalf("failed to save story: %v", err)
	}

	actor1 := &DBActor{
		StoryID:   story.ID,
		ActorID:   "list-test-1",
		NameValue: "Actor One",
		Role:      "Role One",
	}
	actor2 := &DBActor{
		StoryID:   story.ID,
		ActorID:   "list-test-2",
		NameValue: "Actor Two",
		Role:      "Role Two",
	}
	err = actor1.Save(db)
	if err != nil {
		t.Fatalf("Save failed: %v", err)
	}
	err = actor2.Save(db)
	if err != nil {
		t.Fatalf("Save failed: %v", err)
	}

	actors, err := ListByStoryID(db, 1)
	if err != nil {
		t.Fatalf("ListByStoryID failed: %v", err)
	}

	if len(actors) != 2 {
		t.Errorf("expected 2 actors, got %d", len(actors))
	}

	// Verify they're sorted alphabetically
	if actors[0].NameValue != "Actor One" || actors[1].NameValue != "Actor Two" {
		t.Errorf("actors are not in alphabetical order")
	}
}

func TestDBActor_Delete(t *testing.T) {
	server := embeddedpostgres.NewDatabase(embeddedpostgres.DefaultConfig().Port(5432))
	err := server.Start()
	if err != nil {
		t.Fatalf("failed to start embedded postgres: %v", err)
	}
	defer func() {
		if err := server.Stop(); err != nil {
			t.Errorf("failed to stop embedded postgres: %v", err)
		}
	}()

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	db, err := sql.Open("postgres", "postgres://postgres:postgres@127.0.0.1:5432/postgres?sslmode=disable")
	if err != nil {
		t.Fatalf("failed to connect to database: %v", err)
	}
	defer db.Close()

	_, err = db.ExecContext(ctx, string(schema.Bytes))
	if err != nil {
		t.Fatalf("failed to run schema: %v", err)
	}

	// Create a story first
	story := &story.DBStory{
		StoryID: "delete-test-story-1",
		Title:   "Delete Test Story",
	}
	err = story.Save(db)
	if err != nil {
		t.Fatalf("failed to save story: %v", err)
	}

	actor := &DBActor{
		StoryID:   story.ID,
		ActorID:   "delete-test-actor-1",
		NameValue: "Delete Test",
	}
	err = actor.Save(db)
	if err != nil {
		t.Fatalf("Save failed: %v", err)
	}

	// Verify actor exists
	var count int
	err = db.QueryRow("SELECT COUNT(*) FROM actors WHERE id = $1", actor.ID).Scan(&count)
	if err != nil {
		t.Fatalf("failed to count actors: %v", err)
	}
	if count != 1 {
		t.Errorf("expected 1 actor, got %d", count)
	}

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

	// Verify actor is deleted
	err = db.QueryRow("SELECT COUNT(*) FROM actors WHERE id = $1", actor.ID).Scan(&count)
	if err != nil {
		t.Fatalf("failed to count actors after deletion: %v", err)
	}
	if count != 0 {
		t.Errorf("expected 0 actors after deletion, got %d", count)
	}
}

func TestDBActor_GetActorIDForResourceName(t *testing.T) {
	tests := []struct {
		name      string
		input     string
		storyID   int64
		actorID   string
		expectErr bool
	}{
		{
			name:      "valid story/actor resource name",
			input:     "stories/1/actors/my-actor",
			storyID:   1,
			actorID:   "my-actor",
			expectErr: false,
		},
		{
			name:      "valid story/actor resource name with numbers",
			input:     "stories/100/actors/actor-123",
			storyID:   100,
			actorID:   "actor-123",
			expectErr: false,
		},
		{
			name:      "missing actors/ prefix",
			input:     "stories/1/actor/my-actor",
			storyID:   1,
			actorID:   "",
			expectErr: true,
		},
		{
			name:      "actor_id with underscore not allowed",
			input:     "stories/1/actors/my_actor",
			storyID:   1,
			actorID:   "",
			expectErr: true,
		},
		{
			name:      "actor_id with spaces not allowed",
			input:     "stories/1/actors/my actor",
			storyID:   1,
			actorID:   "",
			expectErr: true,
		},
		{
			name:      "actor_id with uppercase not allowed",
			input:     "stories/1/actors/MyActor",
			storyID:   1,
			actorID:   "",
			expectErr: true,
		},
		{
			name:      "actor_id with dots not allowed",
			input:     "stories/1/actors/my.actor",
			storyID:   1,
			actorID:   "",
			expectErr: true,
		},
		{
			name:      "missing stories/ prefix",
			input:     "actors/my-actor",
			storyID:   1,
			actorID:   "",
			expectErr: true,
		},
		{
			name:      "empty actor_id",
			input:     "stories/1/actors/",
			storyID:   1,
			actorID:   "",
			expectErr: true,
		},
		{
			name:      "wrong stories/ prefix",
			input:     "story/1/actors/my-actor",
			storyID:   1,
			actorID:   "",
			expectErr: true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			storyID, actorID, err := GetActorIDForResourceName(tt.input)

			if tt.expectErr {
				if err == nil {
					t.Fatalf("expected error but got nil")
				}
				return
			}

			if err != nil {
				t.Fatalf("unexpected error: %v", err)
			}

			if storyID != tt.storyID {
				t.Errorf("expected story_id %d, got %d", tt.storyID, storyID)
			}

			if actorID != tt.actorID {
				t.Errorf("expected actor_id %s, got %s", tt.actorID, actorID)
			}
		})
	}
}