const std = @import("std");
const sdl3 = @import("sdl3");

const dependencyList = [_][]const u8{
    "core",
    "assets",
    "sdl3",
    "spng",
    "platform",
    "sys",
    "shaderTypes",
    "objLoader",
    "zgltf",
    "ozz",
};

pub fn build(b: *std.Build) void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});
    const static_build = b.option(bool, "static_build", "builds backlog dependencies for static linking") orelse false;

    const mod = b.addModule("rend", .{
        .target = target,
        .optimize = optimize,
        .root_source_file = b.path("src/rend.zig"),
    });

    for (dependencyList) |depName| {
        const dep = b.dependency(depName, .{ .target = target, .optimize = optimize, .static_build = static_build });
        const dep_mod = dep.module(depName);
        mod.addImport(depName, dep_mod);

        if (std.mem.eql(u8, depName, "ozz")) {
            mod.linkLibrary(dep.artifact("ozz_cpp"));
        }
    }

    sdl3.shaderDefintion(b, mod, "../../lib/sdl3", target, optimize, "sample.vert", b.path("shaders/sample.vert.json"));
    sdl3.shaderDefintion(b, mod, "../../lib/sdl3", target, optimize, "meshes.vert", b.path("shaders/meshes.vert.json"));
    sdl3.shaderDefintion(b, mod, "../../lib/sdl3", target, optimize, "lit_mesh.frag", b.path("shaders/lit_mesh.frag.json"));

    sdl3.shaderDefintion(b, mod, "../../lib/sdl3", target, optimize, "debug.frag", b.path("shaders/debug.frag.json"));
    sdl3.shaderDefintion(b, mod, "../../lib/sdl3", target, optimize, "debug.vert", b.path("shaders/debug.vert.json"));

    sdl3.shaderDefintion(b, mod, "../../lib/sdl3", target, optimize, "depthOnly.frag", b.path("shaders/depthOnly.frag.json"));

    sdl3.shaderDefintion(b, mod, "../../lib/sdl3", target, optimize, "skybox.frag", b.path("shaders/skybox.frag.json"));
    sdl3.shaderDefintion(b, mod, "../../lib/sdl3", target, optimize, "skybox.vert", b.path("shaders/skybox.vert.json"));

    sdl3.shaderDefintion(b, mod, "../../lib/sdl3", target, optimize, "postProc.frag", b.path("shaders/postProc.frag.json"));
    sdl3.shaderDefintion(b, mod, "../../lib/sdl3", target, optimize, "postProc.vert", b.path("shaders/postProc.vert.json"));

    sdl3.shaderDefintion(b, mod, "../../lib/sdl3", target, optimize, "ssao.frag", b.path("shaders/ssao.frag.json"));

    // ========== tests ==========
    const tests = b.addTest(.{
        .root_module = b.createModule(.{
            .target = target,
            .optimize = optimize,
            .root_source_file = b.path("tests/tests.zig"),
        }),
    });
    const test_step = b.step("test", "run unit tests for rend");

    const runArtifact = b.addRunArtifact(tests);
    test_step.dependOn(&runArtifact.step);
    b.installArtifact(tests);
}