using Dapper;
using IBKRTrader.Core.Database;
using IBKRTrader.Core.Logging;
using IBKRTrader.Modules.CongressTrading.Models;

namespace IBKRTrader.Modules.CongressTrading.Database;

/// <summary>
/// Datenbankzugriff für das CongressTrading-Modul.
/// Kapselt alle INSERT/SELECT auf ct_congressMember und ct_trade.
/// </summary>
public class CongressRepository
{
    private readonly DatabaseService _db;
    private readonly LoggingService  _logger;

    public CongressRepository(DatabaseService db, LoggingService logger)
    {
        _db     = db;
        _logger = logger;
    }

    // ─── CongressMember ───────────────────────────────────────────────────────

    public async Task<bool> MemberExistsAsync(string bioId)
    {
        var count = await _db.ExecuteScalarAsync<int>(
            "SELECT COUNT(*) FROM `ct_congressMember` WHERE bio_id = @bioId",
            new { bioId });
        return count > 0;
    }

    public async Task UpsertMemberAsync(CongressMember member)
    {
        await _db.ExecuteAsync(@"
            INSERT INTO `ct_congressMember` (bio_id, name, party, state, chamber, profile_url)
            VALUES (@BioId, @Name, @Party, @State, @Chamber, @ProfileUrl)
            ON DUPLICATE KEY UPDATE
                name       = VALUES(name),
                party      = VALUES(party),
                state      = VALUES(state),
                chamber    = VALUES(chamber),
                profile_url = VALUES(profile_url),
                last_updated = CURRENT_TIMESTAMP", member);
    }

    public async Task<HashSet<string>> GetAllMemberBioIdsAsync()
    {
        var ids = await _db.QueryAsync<string>(
            "SELECT bio_id FROM `ct_congressMember`");
        return ids.ToHashSet();
    }

    // ─── CongressTrade ────────────────────────────────────────────────────────

    public async Task<bool> TradeExistsAsync(string tradeId)
    {
        var count = await _db.ExecuteScalarAsync<int>(
            "SELECT COUNT(*) FROM `ct_trade` WHERE trade_id = @tradeId",
            new { tradeId });
        return count > 0;
    }

    public async Task<HashSet<string>> GetAllTradeIdsAsync()
    {
        var ids = await _db.QueryAsync<string>(
            "SELECT trade_id FROM `ct_trade`");
        return ids.ToHashSet();
    }

    /// <summary>Fügt einen Trade ein. Ignoriert Duplikate (INSERT IGNORE).</summary>
    public async Task InsertTradeAsync(CongressTrade trade, bool detailsFetched = true)
    {
        await _db.ExecuteAsync(@"
            INSERT IGNORE INTO `ct_trade`
                (trade_id, member_bio_id, issuer_name, issuer_id, ticker,
                 trade_type, chamber, owner, value,
                 trade_date, published_date, detail_url, details_fetched)
            VALUES
                (@TradeId, @MemberBioId, @IssuerName, @IssuerId, @Ticker,
                 @TradeType, @Chamber, @Owner, @Value,
                 @TradeDate, @PublishedDate, @DetailUrl, @DetailsFetched)",
            new
            {
                trade.TradeId,
                trade.MemberBioId,
                trade.IssuerName,
                trade.IssuerId,
                trade.Ticker,
                trade.TradeType,
                trade.Chamber,
                trade.Owner,
                trade.Value,
                TradeDate     = trade.TradeDate?.ToString("yyyy-MM-dd"),
                PublishedDate = trade.PublishedDate?.ToString("yyyy-MM-dd"),
                trade.DetailUrl,
                DetailsFetched = detailsFetched ? 1 : 0
            });
    }

    /// <summary>Aktualisiert die Detail-Felder eines bereits vorhandenen Trades.</summary>
    public async Task UpdateTradeDetailsAsync(CongressTrade trade)
    {
        await _db.ExecuteAsync(@"
            UPDATE `ct_trade`
            SET  ticker          = @Ticker,
                 trade_type      = @TradeType,
                 trade_date      = @TradeDate,
                 published_date  = @PublishedDate,
                 details_fetched = 1
            WHERE trade_id = @TradeId
              AND details_fetched = 0",
            new
            {
                trade.TradeId,
                trade.Ticker,
                trade.TradeType,
                TradeDate     = trade.TradeDate?.ToString("yyyy-MM-dd"),
                PublishedDate = trade.PublishedDate?.ToString("yyyy-MM-dd")
            });
    }

    /// <summary>Gibt Trade-IDs zurück für die noch keine Details geholt wurden.</summary>
    public async Task<IEnumerable<string>> GetTradesWithoutDetailsAsync(int limit = 500)
        => await _db.QueryAsync<string>(
            "SELECT trade_id FROM `ct_trade` WHERE details_fetched = 0 LIMIT @limit",
            new { limit });

    public async Task<int> GetTradeCountAsync()
        => await _db.ExecuteScalarAsync<int>("SELECT COUNT(*) FROM `ct_trade`");

    public async Task<int> GetMemberCountAsync()
        => await _db.ExecuteScalarAsync<int>("SELECT COUNT(*) FROM `ct_congressMember`");

    // ─── core_settings Flags ──────────────────────────────────────────────────

    public async Task<string?> GetSettingAsync(string key)
    {
        return await _db.QueryFirstOrDefaultAsync<string>(
            "SELECT `value` FROM `core_settings` WHERE `key` = @key",
            new { key });
    }

    public async Task SetSettingAsync(string key, string value)
    {
        await _db.ExecuteAsync(@"
            INSERT INTO `core_settings` (`key`, `value`)
            VALUES (@key, @value)
            ON DUPLICATE KEY UPDATE `value` = @value",
            new { key, value });
    }

    public async Task DeleteSettingAsync(string key)
    {
        await _db.ExecuteAsync(
            "DELETE FROM `core_settings` WHERE `key` = @key", new { key });
    }

    // ─── Reset ────────────────────────────────────────────────────────────────

    /// <summary>
    /// Löscht alle CT-Fortschritts-Flags und alle CT-Daten aus der DB.
    /// Danach startet der History-Import beim nächsten Worker-Run von Seite 1.
    /// </summary>
    public async Task ResetHistoryImportAsync()
    {
        await DeleteSettingAsync("ct.history_import_done");
        await DeleteSettingAsync("ct.history_import_page");
        await DeleteSettingAsync("ct.history_import_total");
        await _db.ExecuteAsync("DELETE FROM `ct_trade`");
        await _db.ExecuteAsync("DELETE FROM `ct_congressMember`");
        _logger.Warn("CT", "History-Import-Reset durchgeführt – alle CT-Daten gelöscht.");
    }
}