const std = @import("std");

pub const Config = struct {
    listen_host: []const u8,
    listen_port: u16,
    cache_size: usize,
    cache_dir: []const u8,
    geolite_path: []const u8,
    geolocator_url: []const u8,

    pub fn load(allocator: std.mem.Allocator) !Config {
        return Config{
            .listen_host = std.process.getEnvVarOwned(allocator, "WTTR_LISTEN_HOST") catch try allocator.dupe(u8, "0.0.0.0"),
            .listen_port = blk: {
                const port_str = std.process.getEnvVarOwned(allocator, "WTTR_LISTEN_PORT") catch break :blk 8002;
                defer allocator.free(port_str);
                break :blk std.fmt.parseInt(u16, port_str, 10) catch 8002;
            },
            .cache_size = blk: {
                const size_str = std.process.getEnvVarOwned(allocator, "WTTR_CACHE_SIZE") catch break :blk 10_000;
                defer allocator.free(size_str);
                break :blk std.fmt.parseInt(usize, size_str, 10) catch 10_000;
            },
            .cache_dir = std.process.getEnvVarOwned(allocator, "WTTR_CACHE_DIR") catch try allocator.dupe(u8, "/tmp/wttr-cache"),
            .geolite_path = std.process.getEnvVarOwned(allocator, "WTTR_GEOLITE_PATH") catch try allocator.dupe(u8, "./GeoLite2-City.mmdb"),
            .geolocator_url = std.process.getEnvVarOwned(allocator, "WTTR_GEOLOCATOR_URL") catch try allocator.dupe(u8, "http://localhost:8004"),
        };
    }

    pub fn deinit(self: Config, allocator: std.mem.Allocator) void {
        allocator.free(self.listen_host);
        allocator.free(self.cache_dir);
        allocator.free(self.geolite_path);
        allocator.free(self.geolocator_url);
    }
};