using GymLogAI.Application.DTOs;
using GymLogAI.Application.Interfaces;

namespace GymLogAI.AI;

public sealed class WorkoutParserAIService(OpenRouterChatClient chatClient) : IWorkoutParser
{
    public async Task<ParsedWorkoutDto?> ParseAsync(string text, CancellationToken cancellationToken)
    {
        await chatClient.CompleteAsync($"Parse workout:\n{text}", cancellationToken);

        var lines = text
            .Split(['\r', '\n'], StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
            .Where(x => !string.IsNullOrWhiteSpace(x))
            .ToArray();

        if (lines.Length == 0)
        {
            return null;
        }

        var exercises = lines
            .Select((line, index) => new ParsedExerciseDto(
                line,
                index + 1,
                null,
                [new ParsedExerciseSetDto(1, 10, null, null, null, "Stub set")]))
            .ToArray();

        return new ParsedWorkoutDto(
            DateTime.UtcNow,
            "Imported workout",
            "Stubbed parser result",
            exercises);
    }
}