using NeonSprawl.Server.Game.Encounters;
using NeonSprawl.Server.Game.Factions;
using NeonSprawl.Server.Game.Items;
using NeonSprawl.Server.Game.PositionState;
using NeonSprawl.Server.Game.Rewards;
using NeonSprawl.Server.Game.Skills;

namespace NeonSprawl.Server.Game.Contracts;

/// <summary>Maps <c>POST /game/players/{{id}}/contracts/issue</c> (NEO-151).</summary>
public static class ContractIssueApi
{
    public static WebApplication MapContractIssueApi(this WebApplication app)
    {
        app.MapPost(
            "/game/players/{id}/contracts/issue",
            (string id, ContractIssueRequest? body, IPositionStateStore positions,
                IContractTemplateRegistry templateRegistry, IEncounterDefinitionRegistry encounterRegistry,
                IItemDefinitionRegistry itemRegistry, ISkillDefinitionRegistry skillRegistry,
                IFactionDefinitionRegistry factionRegistry, IContractInstanceStore instanceStore,
                IFactionStandingStore standingStore, IRewardDeliveryStore deliveryStore,
                TimeProvider timeProvider) =>
            {
                var trimmedId = id.Trim();
                if (trimmedId.Length == 0 || !positions.TryGetPosition(trimmedId, out _))
                {
                    return Results.NotFound();
                }

                if (body is null || body.SchemaVersion != ContractIssueRequest.CurrentSchemaVersion)
                {
                    return Results.BadRequest();
                }

                var normalizedTemplateId = ContractInstanceIds.NormalizeTemplateId(body.TemplateId);
                var normalizedSeedBucket = ContractInstanceIds.NormalizeSeedBucket(body.SeedBucket);
                var normalizedBodyPlayerId = ContractInstanceIds.NormalizePlayerId(body.PlayerId);
                if (normalizedTemplateId.Length == 0 ||
                    normalizedSeedBucket.Length == 0 ||
                    normalizedBodyPlayerId.Length == 0)
                {
                    return Results.BadRequest();
                }

                var normalizedPathPlayerId = ContractInstanceIds.NormalizePlayerId(trimmedId);
                if (!string.Equals(normalizedBodyPlayerId, normalizedPathPlayerId, StringComparison.Ordinal))
                {
                    return Results.BadRequest();
                }

                var result = ContractGeneratorOperations.TryIssue(
                    trimmedId,
                    normalizedTemplateId,
                    normalizedSeedBucket,
                    body.ZoneDifficultyBand,
                    templateRegistry,
                    encounterRegistry,
                    itemRegistry,
                    skillRegistry,
                    factionRegistry,
                    instanceStore,
                    standingStore,
                    timeProvider);

                return Results.Json(
                    MapIssueResponse(trimmedId, result, templateRegistry, deliveryStore));
            });

        return app;
    }

    internal static ContractIssueResponse MapIssueResponse(
        string playerId,
        ContractIssueOperationResult result,
        IContractTemplateRegistry templateRegistry,
        IRewardDeliveryStore deliveryStore)
    {
        ContractInstanceRowJson? contract = null;
        if (result.Snapshot is { } snapshot)
        {
            contract = ContractListApi.MapInstanceRow(
                playerId,
                snapshot,
                templateRegistry,
                deliveryStore,
                result.EncounterTemplateId);
        }

        return new ContractIssueResponse
        {
            Issued = result.Success,
            ReasonCode = result.ReasonCode,
            Contract = contract,
        };
    }
}