using Dapper;
using Npgsql;
using SatelliteProvider.DataAccess.Models;

namespace SatelliteProvider.DataAccess.Repositories;

public class RouteRepository : IRouteRepository
{
    private readonly string _connectionString;

    public RouteRepository(string connectionString)
    {
        _connectionString = connectionString;
    }

    public async Task<RouteEntity?> GetByIdAsync(Guid id)
    {
        using var connection = new NpgsqlConnection(_connectionString);
        const string sql = @"
            SELECT id, name, description, region_size_meters as RegionSizeMeters, 
                   zoom_level as ZoomLevel, total_distance_meters as TotalDistanceMeters,
                   total_points as TotalPoints, request_maps as RequestMaps, 
                   maps_ready as MapsReady, csv_file_path as CsvFilePath,
                   summary_file_path as SummaryFilePath, stitched_image_path as StitchedImagePath,
                   created_at as CreatedAt, updated_at as UpdatedAt
            FROM routes 
            WHERE id = @Id";
        
        return await connection.QuerySingleOrDefaultAsync<RouteEntity>(sql, new { Id = id });
    }

    public async Task<IEnumerable<RoutePointEntity>> GetRoutePointsAsync(Guid routeId)
    {
        using var connection = new NpgsqlConnection(_connectionString);
        const string sql = @"
            SELECT id, route_id as RouteId, sequence_number as SequenceNumber,
                   latitude, longitude, point_type as PointType, segment_index as SegmentIndex,
                   distance_from_previous as DistanceFromPrevious, created_at as CreatedAt
            FROM route_points 
            WHERE route_id = @RouteId
            ORDER BY sequence_number";
        
        return await connection.QueryAsync<RoutePointEntity>(sql, new { RouteId = routeId });
    }

    public async Task<Guid> InsertRouteAsync(RouteEntity route)
    {
        using var connection = new NpgsqlConnection(_connectionString);
        const string sql = @"
            INSERT INTO routes (id, name, description, region_size_meters, zoom_level,
                              total_distance_meters, total_points, request_maps, maps_ready,
                              csv_file_path, summary_file_path, stitched_image_path,
                              created_at, updated_at)
            VALUES (@Id, @Name, @Description, @RegionSizeMeters, @ZoomLevel,
                    @TotalDistanceMeters, @TotalPoints, @RequestMaps, @MapsReady,
                    @CsvFilePath, @SummaryFilePath, @StitchedImagePath,
                    @CreatedAt, @UpdatedAt)
            RETURNING id";
        
        return await connection.ExecuteScalarAsync<Guid>(sql, route);
    }

    public async Task InsertRoutePointsAsync(IEnumerable<RoutePointEntity> points)
    {
        using var connection = new NpgsqlConnection(_connectionString);
        const string sql = @"
            INSERT INTO route_points (id, route_id, sequence_number, latitude, longitude,
                                     point_type, segment_index, distance_from_previous, created_at)
            VALUES (@Id, @RouteId, @SequenceNumber, @Latitude, @Longitude,
                    @PointType, @SegmentIndex, @DistanceFromPrevious, @CreatedAt)";
        
        await connection.ExecuteAsync(sql, points);
    }

    public async Task<int> UpdateRouteAsync(RouteEntity route)
    {
        using var connection = new NpgsqlConnection(_connectionString);
        const string sql = @"
            UPDATE routes 
            SET name = @Name,
                description = @Description,
                region_size_meters = @RegionSizeMeters,
                zoom_level = @ZoomLevel,
                total_distance_meters = @TotalDistanceMeters,
                total_points = @TotalPoints,
                request_maps = @RequestMaps,
                maps_ready = @MapsReady,
                csv_file_path = @CsvFilePath,
                summary_file_path = @SummaryFilePath,
                stitched_image_path = @StitchedImagePath,
                updated_at = @UpdatedAt
            WHERE id = @Id";
        
        return await connection.ExecuteAsync(sql, route);
    }

    public async Task<int> DeleteRouteAsync(Guid id)
    {
        using var connection = new NpgsqlConnection(_connectionString);
        const string sql = "DELETE FROM routes WHERE id = @Id";
        return await connection.ExecuteAsync(sql, new { Id = id });
    }

    public async Task LinkRouteToRegionAsync(Guid routeId, Guid regionId)
    {
        using var connection = new NpgsqlConnection(_connectionString);
        const string sql = @"
            INSERT INTO route_regions (route_id, region_id, created_at)
            VALUES (@RouteId, @RegionId, @CreatedAt)
            ON CONFLICT (route_id, region_id) DO NOTHING";
        
        await connection.ExecuteAsync(sql, new { RouteId = routeId, RegionId = regionId, CreatedAt = DateTime.UtcNow });
    }

    public async Task<IEnumerable<Guid>> GetRegionIdsByRouteAsync(Guid routeId)
    {
        using var connection = new NpgsqlConnection(_connectionString);
        const string sql = @"
            SELECT region_id
            FROM route_regions 
            WHERE route_id = @RouteId";
        
        return await connection.QueryAsync<Guid>(sql, new { RouteId = routeId });
    }

    public async Task<IEnumerable<RouteEntity>> GetRoutesWithPendingMapsAsync()
    {
        using var connection = new NpgsqlConnection(_connectionString);
        const string sql = @"
            SELECT id, name, description, region_size_meters as RegionSizeMeters, 
                   zoom_level as ZoomLevel, total_distance_meters as TotalDistanceMeters,
                   total_points as TotalPoints, request_maps as RequestMaps, 
                   maps_ready as MapsReady, csv_file_path as CsvFilePath,
                   summary_file_path as SummaryFilePath, stitched_image_path as StitchedImagePath,
                   created_at as CreatedAt, updated_at as UpdatedAt
            FROM routes 
            WHERE request_maps = true AND maps_ready = false";
        
        return await connection.QueryAsync<RouteEntity>(sql);
    }
}