namespace GermanApp.Application.DTOs;

/// <summary>
/// Data Transfer Object for StorySegment.
/// Used for API requests and responses.
/// </summary>
public record StorySegmentDto(
    int Id,
    int LevelId,
    int? LessonId,
    string Content,
    string? AudioUrl,
    int Order,
    string Title,
    string Theme,
    int EstimatedReadingMinutes,
    bool IsActive,
    DateTime CreatedAt,
    DateTime? UpdatedAt)
{
    /// <summary>
    /// Creates a StorySegmentDto from a domain entity.
    /// </summary>
    public static StorySegmentDto FromEntity(Domain.Entities.StorySegment segment)
    {
        return new StorySegmentDto(
            segment.Id,
            segment.LevelId,
            segment.LessonId,
            segment.Content,
            segment.AudioUrl,
            segment.Order,
            segment.Title,
            segment.Theme,
            segment.EstimatedReadingMinutes,
            segment.IsActive,
            segment.CreatedAt,
            segment.UpdatedAt);
    }
}

/// <summary>
/// DTO for creating a new story segment.
/// </summary>
public record CreateStorySegmentDto(
    int LevelId,
    int? LessonId,
    string Content,
    int Order,
    string Title,
    string Theme,
    int EstimatedReadingMinutes = 2);

/// <summary>
/// DTO for updating an existing story segment.
/// </summary>
public record UpdateStorySegmentDto(
    string? Content = null,
    int? Order = null,
    string? Title = null,
    string? Theme = null,
    int? EstimatedReadingMinutes = null,
    int? LessonId = null,
    bool? IsActive = null);

/// <summary>
/// DTO for generating a story for a level.
/// </summary>
public record StoryGenerationRequestDto(
    int LevelId,
    string Theme,
    int SegmentCount,
    string? CustomPrompt = null);

/// <summary>
/// Response DTO for story generation.
/// </summary>
public record StoryGenerationResponseDto(
    int LevelId,
    string Theme,
    int SegmentCount,
    string FullStoryText,
    IReadOnlyList<StorySegmentDto> Segments);

/// <summary>
/// DTO for user's story progress.
/// </summary>
public record StoryProgressDto(
    int LevelId,
    string LevelName,
    int TotalSegments,
    int UnlockedSegments,
    int CurrentSegmentOrder,
    IReadOnlyList<StorySegmentProgressDto> Segments);

/// <summary>
/// DTO for individual segment progress.
/// </summary>
public record StorySegmentProgressDto(
    int SegmentId,
    int Order,
    string Title,
    bool IsUnlocked,
    bool IsCompleted);