// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.

using System;
using System.Collections.Generic;
using System.Linq;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using osu.Game.Beatmaps;
using osu.Game.Database;
using osu.Game.Rulesets;
using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.Scoring;
using osu.Game.Scoring;

namespace osu.Game.Online.API.Requests.Responses
{
    [Serializable]
    public class SoloScoreInfo : IHasOnlineID<long>
    {
        [JsonProperty("replay")]
        public bool HasReplay { get; set; }

        [JsonProperty("beatmap_id")]
        public int BeatmapID { get; set; }

        [JsonProperty("ruleset_id")]
        public int RulesetID { get; set; }

        [JsonProperty("build_id")]
        public int? BuildID { get; set; }

        [JsonProperty("passed")]
        public bool Passed { get; set; }

        [JsonProperty("total_score")]
        public int TotalScore { get; set; }

        [JsonProperty("accuracy")]
        public double Accuracy { get; set; }

        [JsonProperty("user_id")]
        public int UserID { get; set; }

        // TODO: probably want to update this column to match user stats (short)?
        [JsonProperty("max_combo")]
        public int MaxCombo { get; set; }

        [JsonConverter(typeof(StringEnumConverter))]
        [JsonProperty("rank")]
        public ScoreRank Rank { get; set; }

        [JsonProperty("started_at")]
        public DateTimeOffset? StartedAt { get; set; }

        [JsonProperty("ended_at")]
        public DateTimeOffset? EndedAt { get; set; }

        [JsonProperty("mods")]
        public APIMod[] Mods { get; set; } = Array.Empty<APIMod>();

        [JsonIgnore]
        [JsonProperty("created_at")]
        public DateTimeOffset CreatedAt { get; set; }

        [JsonIgnore]
        [JsonProperty("updated_at")]
        public DateTimeOffset UpdatedAt { get; set; }

        [JsonIgnore]
        [JsonProperty("deleted_at")]
        public DateTimeOffset? DeletedAt { get; set; }

        [JsonProperty("statistics")]
        public Dictionary<HitResult, int> Statistics { get; set; } = new Dictionary<HitResult, int>();

        #region osu-web API additions (not stored to database).

        [JsonProperty("id")]
        public long? ID { get; set; }

        [JsonProperty("user")]
        public APIUser? User { get; set; }

        [JsonProperty("pp")]
        public double? PP { get; set; }

        #endregion

        public override string ToString() => $"score_id: {ID} user_id: {UserID}";

        /// <summary>
        /// Create a <see cref="ScoreInfo"/> from an API score instance.
        /// </summary>
        /// <param name="rulesets">A ruleset store, used to populate a ruleset instance in the returned score.</param>
        /// <param name="beatmap">An optional beatmap, copied into the returned score (for cases where the API does not populate the beatmap).</param>
        /// <returns></returns>
        public ScoreInfo ToScoreInfo(RulesetStore rulesets, BeatmapInfo? beatmap = null)
        {
            var ruleset = rulesets.GetRuleset(RulesetID) ?? throw new InvalidOperationException($"Ruleset with ID of {RulesetID} not found locally");

            var rulesetInstance = ruleset.CreateInstance();

            var mods = Mods.Select(apiMod => apiMod.ToMod(rulesetInstance)).ToArray();

            var scoreInfo = ToScoreInfo(mods);

            scoreInfo.Ruleset = ruleset;
            if (beatmap != null) scoreInfo.BeatmapInfo = beatmap;

            return scoreInfo;
        }

        /// <summary>
        /// Create a <see cref="ScoreInfo"/> from an API score instance.
        /// </summary>
        /// <param name="mods">The mod instances, resolved from a ruleset.</param>
        /// <returns></returns>
        public ScoreInfo ToScoreInfo(Mod[] mods) => new ScoreInfo
        {
            OnlineID = OnlineID,
            User = User ?? new APIUser { Id = UserID },
            BeatmapInfo = new BeatmapInfo { OnlineID = BeatmapID },
            Ruleset = new RulesetInfo { OnlineID = RulesetID },
            Passed = Passed,
            TotalScore = TotalScore,
            Accuracy = Accuracy,
            MaxCombo = MaxCombo,
            Rank = Rank,
            Statistics = Statistics,
            Date = EndedAt ?? DateTimeOffset.Now,
            Hash = HasReplay ? "online" : string.Empty, // TODO: temporary?
            Mods = mods,
            PP = PP,
        };

        public long OnlineID => ID ?? -1;
    }
}