using System;
using System.Collections.Generic;

namespace StellaOps.Concelier.Merge.Services;

/// <summary>
/// Canonical conflict detail used to materialize structured payloads for persistence and explainers.
/// </summary>
public sealed record ConflictDetailPayload(
    string Type,
    string Reason,
    IReadOnlyList<string> PrimarySources,
    int PrimaryRank,
    IReadOnlyList<string> SuppressedSources,
    int SuppressedRank,
    string? PrimaryValue,
    string? SuppressedValue)
{
    public static ConflictDetailPayload FromDetail(MergeConflictDetail detail)
    {
        ArgumentNullException.ThrowIfNull(detail);

        return new ConflictDetailPayload(
            detail.ConflictType,
            detail.Reason,
            detail.PrimarySources,
            detail.PrimaryRank,
            detail.SuppressedSources,
            detail.SuppressedRank,
            detail.PrimaryValue,
            detail.SuppressedValue);
    }

    public MergeConflictExplainerPayload ToExplainer() =>
        new(
            Type,
            Reason,
            PrimarySources,
            PrimaryRank,
            SuppressedSources,
            SuppressedRank,
            PrimaryValue,
            SuppressedValue);
}