package actor

import (
	"fmt"
	"strings"
	"testing"
	"time"

	v1 "git.tipsy.codes/charles/webstory/pkg/api/webstory/v1"
	"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
		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:  "actor1",
				NameValue: "Player",
			},
			expectErr: false,
			checkFunc: func(a *DBActor) error {
				if a.ActorID != "actor1" {
					return fmt.Errorf("expected ActorID actor1, got %s", a.ActorID)
				}
				if a.NameValue != "Player" {
					return fmt.Errorf("expected NameValue Player, got %s", a.NameValue)
				}
				return nil
			},
		},
		{
			name: "actor with all fields converts correctly",
			apiActor: &v1.Actor{
				Name:       "stories/my-actor-1",
				ActorId:    "my-actor-1",
				NameValue:  "The Hero",
				Role:       "protagonist",
				Notes:      "Main character",
				CreateTime: timestamppb.New(now),
				UpdateTime: timestamppb.New(now),
				Etag:       "etag-123",
			},
			expectErr: false,
			checkFunc: func(a *DBActor) error {
				if a.ActorID != "my-actor-1" {
					return fmt.Errorf("expected ActorID my-actor-1, got %s", a.ActorID)
				}
				if a.NameValue != "The Hero" {
					return fmt.Errorf("expected NameValue The Hero, got %s", a.NameValue)
				}
				if a.Role != "protagonist" {
					return fmt.Errorf("expected Role protagonist, got %s", a.Role)
				}
				if a.Notes != "Main character" {
					return fmt.Errorf("expected Notes Main character, got %s", a.Notes)
				}
				if a.Etag != "etag-123" {
					return fmt.Errorf("expected Etag etag-123, got %s", a.Etag)
				}
				return nil
			},
		},
		{
			name: "empty notes converted to empty string",
			apiActor: &v1.Actor{
				ActorId:    "actor2",
				NameValue:  "NPC",
				Notes:      "",
			},
			expectErr: false,
			checkFunc: func(a *DBActor) error {
				if a.Notes != "" {
					return fmt.Errorf("expected empty Notes, got %s", a.Notes)
				}
				return nil
			},
		},
		{
			name: "missing name_value returns error",
			apiActor: &v1.Actor{
				ActorId: "actor4",
			},
			expectErr: true,
			errMsg:    "name_value is required",
		},
		{
			name: "invalid actor_id_short returns error",
			apiActor: &v1.Actor{
				NameValue: "Test",
			},
			expectErr: true,
			errMsg:    "invalid actor_id format: must be 4-63 characters, matching pattern /[a-z][0-9-][0-9]$/",
		},
		{
			name: "invalid actor_id_uppercase returns error",
			apiActor: &v1.Actor{
				ActorId: "Actor2",
			},
			expectErr: true,
			errMsg:    "invalid actor_id format: must be 4-63 characters, matching pattern /[a-z][0-9-][0-9]$/",
		},
		{
			name: "invalid actor_id_starts_with_number returns error",
			apiActor: &v1.Actor{
				ActorId: "1actor",
			},
			expectErr: true,
			errMsg:    "invalid actor_id format: must be 4-63 characters, matching pattern /[a-z][0-9-][0-9]$/",
		},
		{
			name: "valid actor_id_with_hyphens_and_numbers",
			apiActor: &v1.Actor{
				NameValue: "Test Actor",
				ActorId:   "my-awesome-actor-123",
			},
			expectErr: false,
			checkFunc: func(a *DBActor) error {
				if a.ActorID != "my-awesome-actor-123" {
					return fmt.Errorf("expected ActorID my-awesome-actor-123, got %s", a.ActorID)
				}
				return nil
			},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			translator := NewActorTranslator()
			got, err := translator.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 message to contain %q, got %q", tt.errMsg, err.Error())
				}
				return
			}

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

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