using System;
using System.Collections.Generic;

using Model = Discord.API.AuditLog;
using EntryModel = Discord.API.AuditLogEntry;

namespace Discord.Rest
{
    internal static class AuditLogHelper
    {
        private static readonly Dictionary<ActionType, Func<BaseDiscordClient, Model, EntryModel, IAuditLogData>> CreateMapping
            = new Dictionary<ActionType, Func<BaseDiscordClient, Model, EntryModel, IAuditLogData>>()
        {
            [ActionType.GuildUpdated] = GuildUpdateAuditLogData.Create,

            [ActionType.ChannelCreated] = ChannelCreateAuditLogData.Create,
            [ActionType.ChannelUpdated] = ChannelUpdateAuditLogData.Create,
            [ActionType.ChannelDeleted] = ChannelDeleteAuditLogData.Create,

            [ActionType.OverwriteCreated] = OverwriteCreateAuditLogData.Create,
            [ActionType.OverwriteUpdated] = OverwriteUpdateAuditLogData.Create,
            [ActionType.OverwriteDeleted] = OverwriteDeleteAuditLogData.Create,

            [ActionType.Kick] = KickAuditLogData.Create,
            [ActionType.Prune] = PruneAuditLogData.Create,
            [ActionType.Ban] = BanAuditLogData.Create,
            [ActionType.Unban] = UnbanAuditLogData.Create,
            [ActionType.MemberUpdated] = MemberUpdateAuditLogData.Create,
            [ActionType.MemberRoleUpdated] = MemberRoleAuditLogData.Create,

            [ActionType.RoleCreated] = RoleCreateAuditLogData.Create,
            [ActionType.RoleUpdated] = RoleUpdateAuditLogData.Create,
            [ActionType.RoleDeleted] = RoleDeleteAuditLogData.Create,

            [ActionType.InviteCreated] = InviteCreateAuditLogData.Create,
            [ActionType.InviteUpdated] = InviteUpdateAuditLogData.Create,
            [ActionType.InviteDeleted] = InviteDeleteAuditLogData.Create,

            [ActionType.WebhookCreated] = WebhookCreateAuditLogData.Create,
            [ActionType.WebhookUpdated] = WebhookUpdateAuditLogData.Create,
            [ActionType.WebhookDeleted] = WebhookDeleteAuditLogData.Create,

            [ActionType.EmojiCreated] = EmoteCreateAuditLogData.Create,
            [ActionType.EmojiUpdated] = EmoteUpdateAuditLogData.Create,
            [ActionType.EmojiDeleted] = EmoteDeleteAuditLogData.Create,

            [ActionType.MessageDeleted] = MessageDeleteAuditLogData.Create,
        };

        public static IAuditLogData CreateData(BaseDiscordClient discord, Model log, EntryModel entry)
        {
            if (CreateMapping.TryGetValue(entry.Action, out var func))
                return func(discord, log, entry);

            return null;
        }
    }
}