// SPDX-FileCopyrightText: © 2026 Jeffrey C. Ollie
// SPDX-License-Identifier: MIT

const PrimitiveGroup = @This();

const std = @import("std");

const OSMPBF = @import("proto/OSMPBF.pb.zig");

const DenseNodeIterator = @import("DenseNodeIterator.zig");

block: *const OSMPBF.PrimitiveBlock,
group: *const OSMPBF.PrimitiveGroup,

pub fn init(block: *const OSMPBF.PrimitiveBlock, group: *const OSMPBF.PrimitiveGroup) PrimitiveGroup {
    return .{
        .block = block,
        .group = group,
    };
}

pub const PrimitiveType = enum {
    nodes,
    dense_nodes,
    ways,
    relations,
    changesets,
    empty,
};

pub fn contains(self: *const PrimitiveGroup) PrimitiveType {
    if (self.group.dense) |_| return .dense_nodes;
    if (self.group.nodes.items.len > 0) return .nodes;
    if (self.group.ways.items.len > 0) return .ways;
    if (self.group.relations.items.len > 0) return .relations;
    if (self.group.changesets.items.len > 0) return .changesets;
    return .empty;
}

pub fn denseNodeIterator(self: *const PrimitiveGroup) DenseNodeIterator {
    return .init(self.block, self.group);
}