using System.Text.Json.Serialization;

namespace NeonSprawl.Server.Game.Quests;

/// <summary>JSON body for <c>GET /game/players/{{id}}/quest-progress</c> (NEO-119).</summary>
public sealed class QuestProgressListResponse
{
    public const int CurrentSchemaVersion = 1;

    [JsonPropertyName("schemaVersion")]
    public int SchemaVersion { get; init; } = CurrentSchemaVersion;

    [JsonPropertyName("playerId")]
    public required string PlayerId { get; init; }

    /// <summary>Per-player rows ordered by catalog quest <c>id</c> (ordinal).</summary>
    [JsonPropertyName("quests")]
    public required IReadOnlyList<QuestProgressRowJson> Quests { get; init; }
}

/// <summary>Authoritative per-player progress for one quest definition.</summary>
public sealed class QuestProgressRowJson
{
    [JsonPropertyName("questId")]
    public required string QuestId { get; init; }

    /// <summary><c>not_started</c>, <c>active</c>, or <c>completed</c>.</summary>
    [JsonPropertyName("status")]
    public required string Status { get; init; }

    [JsonPropertyName("currentStepIndex")]
    public int CurrentStepIndex { get; init; }

    /// <summary>Objective id → accumulated count for the current step only.</summary>
    [JsonPropertyName("objectiveCounters")]
    public required IReadOnlyDictionary<string, int> ObjectiveCounters { get; init; }

    [JsonPropertyName("completedAt")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public DateTimeOffset? CompletedAt { get; init; }

    /// <summary>Grant snapshot when <see cref="Status"/> is <c>completed</c> and delivery was recorded (NEO-129).</summary>
    [JsonPropertyName("completionRewardSummary")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public QuestCompletionRewardSummaryJson? CompletionRewardSummary { get; init; }
}

/// <summary>Item + skill XP grants applied on first-time quest completion (NEO-129).</summary>
public sealed class QuestCompletionRewardSummaryJson
{
    [JsonPropertyName("itemGrants")]
    public required IReadOnlyList<QuestItemGrantJson> ItemGrants { get; init; }

    [JsonPropertyName("skillXpGrants")]
    public required IReadOnlyList<QuestSkillXpGrantJson> SkillXpGrants { get; init; }
}

/// <summary>One item grant line in <see cref="QuestCompletionRewardSummaryJson"/>.</summary>
public sealed class QuestItemGrantJson
{
    [JsonPropertyName("itemId")]
    public required string ItemId { get; init; }

    [JsonPropertyName("quantity")]
    public required int Quantity { get; init; }
}

/// <summary>One skill XP grant line in <see cref="QuestCompletionRewardSummaryJson"/>.</summary>
public sealed class QuestSkillXpGrantJson
{
    [JsonPropertyName("skillId")]
    public required string SkillId { get; init; }

    [JsonPropertyName("amount")]
    public required int Amount { get; init; }
}