const std = @import("std");

pub fn build(b: *std.Build) void {
    const target   = b.standardTargetOptions (.{});
    const optimize = b.standardOptimizeOption(.{ .preferred_optimize_mode = .ReleaseFast });

    const leveldb_static_lib = build_leveldb(b, target, optimize);

    const module = b.addModule("leveldb", .{
        .root_source_file = b.path("src/leveldb.zig"),
        .target   = target,
        .optimize = optimize,
    });
    module.linkLibrary(leveldb_static_lib);
}

fn build_leveldb(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.builtin.OptimizeMode) *std.Build.Step.Compile {
    const source = b.dependency("leveldb", .{});
    const static_lib = b.addStaticLibrary(.{
        .name = "leveldb",
        .target   = target,
        .optimize = optimize,
    });
    static_lib.linkLibCpp();
    static_lib.addIncludePath(source.path(""));
    static_lib.addIncludePath(source.path("include"));
    static_lib.installHeadersDirectory(source.path("include"), "", .{});

    if (target.result.os.tag == .windows) {
        static_lib.root_module.addCMacro("LEVELDB_PLATFORM_WINDOWS", "1");
        static_lib.addCSourceFile(.{ .file = source.path("util/env_windows.cc") });
    } else {
        static_lib.root_module.addCMacro("LEVELDB_PLATFORM_POSIX", "1");
        static_lib.addCSourceFile(.{ .file = source.path("util/env_posix.cc") });
    }

    static_lib.addCSourceFiles(.{
        .root = source.path(""),
        .files = &.{
            "db/builder.cc",
            "db/c.cc",
            "db/db_impl.cc",
            "db/db_iter.cc",
            "db/dbformat.cc",
            "db/dumpfile.cc",
            "db/filename.cc",
            "db/log_reader.cc",
            "db/log_writer.cc",
            "db/memtable.cc",
            "db/repair.cc",
            "db/table_cache.cc",
            "db/version_edit.cc",
            "db/version_set.cc",
            "db/write_batch.cc",
            "table/block_builder.cc",
            "table/block.cc",
            "table/filter_block.cc",
            "table/format.cc",
            "table/iterator.cc",
            "table/merger.cc",
            "table/table_builder.cc",
            "table/table.cc",
            "table/two_level_iterator.cc",
            "util/arena.cc",
            "util/bloom.cc",
            "util/cache.cc",
            "util/coding.cc",
            "util/comparator.cc",
            "util/crc32c.cc",
            "util/env.cc",
            "util/filter_policy.cc",
            "util/hash.cc",
            "util/logging.cc",
            "util/options.cc",
            "util/status.cc",
        },
    });

    b.installArtifact(static_lib);
    return static_lib;
}