// file: crates/apps/game-snake-poc-tauri/build.rs
// version: 2

//! Build-time integration for the Snake Tauri host.

const GENERATED_ANDROID_TAURI_BUILD_GRADLE: &str = "gen/android/app/tauri.build.gradle.kts";
const GRADLE_8_IMPLEMENTATION_DECLARATION: &str = "val implementation by configurations";
const GRADLE_9_IMPLEMENTATION_DECLARATION: &str = "val implementation = configurations.getByName(\"implementation\")";

fn patch_generated_android_gradle() {
    let manifest_dir = match std::env::var_os("CARGO_MANIFEST_DIR") {
        Some(value) => std::path::PathBuf::from(value),
        None => return,
    };
    let path = manifest_dir.join(GENERATED_ANDROID_TAURI_BUILD_GRADLE);
    let content = match std::fs::read_to_string(&path) {
        std::result::Result::Ok(value) => value,
        std::result::Result::Err(error) if error.kind() == std::io::ErrorKind::NotFound => return,
        std::result::Result::Err(error) => {
            println!("cargo:warning=failed to inspect {}: {error}", path.display());
            return;
        },
    };
    if content.contains(GRADLE_9_IMPLEMENTATION_DECLARATION) {
        return;
    }
    if !content.contains(GRADLE_8_IMPLEMENTATION_DECLARATION) {
        println!("cargo:warning={} does not match the expected Tauri 2.11.x Gradle bridge", path.display());
        return;
    }
    let patched = content.replace(GRADLE_8_IMPLEMENTATION_DECLARATION, GRADLE_9_IMPLEMENTATION_DECLARATION);
    if let std::result::Result::Err(error) = std::fs::write(&path, patched) {
        println!("cargo:warning=failed to prepare {} for Gradle 9: {error}", path.display());
    }
    return;
}

fn main() {
    tauri_build::build();
    patch_generated_android_gradle();
    return;
}