using Core.Annotations;
using Core.Models.Eft.Common.Tables;
using Core.Models.Spt.Bots;
using Core.Helpers;
using Core.Models.Enums;
using Core.Models.Spt.Config;
using Core.Models.Utils;
using Core.Servers;

using Core.Utils;

namespace Core.Services;

[Injectable(InjectionType.Singleton)]
public class BotNameService
{
    protected ISptLogger<BotNameService> _logger;
    protected BotHelper _botHelper;
    protected RandomUtil _randomUtil;
    protected LocalisationService _localisationService;
    protected DatabaseService _databaseService;
    protected ConfigServer _configServer;
    protected BotConfig _botConfig;

    protected HashSet<string> _usedNameCache;

    public BotNameService(
        ISptLogger<BotNameService> logger,
        BotHelper botHelper,
        RandomUtil randomUtil,
        LocalisationService localisationService,
        DatabaseService databaseService,
        ConfigServer configServer)
    {
        _logger = logger;
        _botHelper = botHelper;
        _randomUtil = randomUtil;
        _localisationService = localisationService;
        _databaseService = databaseService;
        _configServer = configServer;

        _botConfig = _configServer.GetConfig<BotConfig>();
        _usedNameCache = new HashSet<string>();
    }

    /// <summary>
    /// Clear out any entries in Name Set
    /// </summary>
    public void ClearNameCache() 
    {
        throw new NotImplementedException();
    }

    /// <summary>
    /// Create a unique bot nickname
    /// </summary>
    /// <param name="botJsonTemplate">bot JSON data from db</param>
    /// <param name="botGenerationDetails"></param>
    /// <param name="botRole">role of bot e.g. assault</param>
    /// <param name="uniqueRoles">Lowercase roles to always make unique</param>
    /// <returns>Nickname for bot</returns>
    public string GenerateUniqueBotNickname(
        BotType botJsonTemplate,
        BotGenerationDetails botGenerationDetails,
        string botRole,
        List<string> uniqueRoles = null)
    {
        var isPmc = botGenerationDetails.IsPmc;

        // Never show for players
        var showTypeInNickname = !botGenerationDetails.IsPlayerScav.GetValueOrDefault(false) && _botConfig.ShowTypeInNickname;
        var roleShouldBeUnique = uniqueRoles?.Contains(botRole.ToLower());

        var isUnique = true;
        var attempts = 0;
        while (attempts <= 5)
        {
            // Get bot name with leading/trailing whitespace removed
            var name = (isPmc.GetValueOrDefault(false)) // Explicit handling of PMCs, all other bots will get "first_name last_name"
                ? _botHelper.GetPmcNicknameOfMaxLength(_botConfig.BotNameLengthLimit, botGenerationDetails.Side)
                : $"{ _randomUtil.GetArrayValue(botJsonTemplate.FirstNames)} {_randomUtil.GetArrayValue(botJsonTemplate.LastNames)}";

            name = name.Trim();

            // Config is set to add role to end of bot name
            if (showTypeInNickname)
            {
                name += $" { botRole}";
            }

            // Replace pmc bot names with player name + prefix
            if (botGenerationDetails.IsPmc.GetValueOrDefault(false) && botGenerationDetails.AllPmcsHaveSameNameAsPlayer.GetValueOrDefault(false))
            {
                var prefix = _localisationService.GetRandomTextThatMatchesPartialKey("pmc-name_prefix_");
                name = $"{prefix} { name}";
            }

            // Is this a role that must be unique
            if (roleShouldBeUnique.GetValueOrDefault(false))
            {
                // Check name in cache
                isUnique = _usedNameCache.Contains(name);
                if (!isUnique)
                {
                    // Not unique
                    if (attempts >= 5)
                    {
                        // 5 attempts to generate a name, pool probably isn't big enough
                        var genericName = $"{ botGenerationDetails.Side} { _randomUtil.GetInt(100000, 999999)}";
                        _logger.Debug($"Failed to find unique name for: { botRole} ${ botGenerationDetails.Side} after 5 attempts, using: ${ genericName}");

                        return genericName;
                    }

                    attempts++;

                    // Try again
                    continue;
                }
            }

            // Add bot name to cache to prevent being used again
            _usedNameCache.Add(name);

            return name;
        }

        // Should never reach here
        return $"BOT {botRole} {botGenerationDetails.BotDifficulty}";
    }

    /// <summary>
    /// Add random PMC name to bots MainProfileNickname property
    /// </summary>
    /// <param name="bot">Bot to update</param>
    public void AddRandomPmcNameToBotMainProfileNicknameProperty(BotBase bot) 
    {
        // Simulate bot looking like a player scav with the PMC name in brackets.
        // E.g. "ScavName (PMC Name)"
        bot.Info.MainProfileNickname = GetRandomPmcName();
    }

    /// <summary>
    /// Choose a random PMC name from bear or usec bot jsons
    /// </summary>
    /// <returns>PMC name as string</returns>
    protected string GetRandomPmcName() 
    {
        var bots = _databaseService.GetBots().Types;

        var pmcNames = new List<string>();
        pmcNames.AddRange(bots["usec"].FirstNames);
        pmcNames.AddRange(bots["bear"].FirstNames);

        return _randomUtil.GetArrayValue(pmcNames);
    }
}