using System.Collections.Generic;
using System.Linq;

namespace GB5Shared.DTO.Qualifier
{
    /// <summary>
    /// Aggregated result returned from <c>IQualifierFacade.ExecuteStageAsync</c>.
    /// Findings are accumulated across all qualifiers that ran in the requested stage.
    /// Facts are the hierarchical export from <c>QualifierFactBag.ExportAll()</c>.
    /// </summary>
    public sealed class QualifierResult
    {
        public bool                          IsSuccess    { get; init; }
        public IReadOnlyList<QualifierFinding> Findings   { get; init; } = [];

        /// <summary>
        /// Hierarchical fact export: <c>{ "Document": {...}, "Lines": [...], "Groups": {...} }</c>.
        /// Set by the facade after all qualifiers complete.
        /// </summary>
        public IReadOnlyDictionary<string, object?> Facts { get; init; }
            = new Dictionary<string, object?>();

        public bool HasErrors   => Findings.Any(f => f.Severity == FindingSeverity.Error);
        public bool HasWarnings => Findings.Any(f => f.Severity == FindingSeverity.Warning);

        public static QualifierResult Success(
            IReadOnlyList<QualifierFinding> findings,
            IReadOnlyDictionary<string, object?> facts)
            => new() { IsSuccess = true,  Findings = findings, Facts = facts };

        public static QualifierResult Failure(
            IReadOnlyList<QualifierFinding> findings,
            IReadOnlyDictionary<string, object?> facts)
            => new() { IsSuccess = false, Findings = findings, Facts = facts };
    }
}