let manifest_dir = std::env::var("CARGO_MANIFEST_DIR").unwrap();

let pkg_dir = std::path::Path::new(&manifest_dir).join("target/site/pkg");

let out_dir = std::env::var("OUT_DIR").unwrap();

let dest = std::path::Path::new(&out_dir).join("embedded_assets.rs");

let js = pkg_dir.join("transity.js");

let css = pkg_dir.join("transity.css");

let wasm = pkg_dir.join("transity.wasm");

// Apache ECharts for the trend charts, installed via `bun install`

let echarts = std::path::Path::new(&manifest_dir)

.join("node_modules/echarts/dist/echarts.min.js");

let assets_present = js.exists() && css.exists() && wasm.exists();

let ssr_enabled = std::env::var("CARGO_FEATURE_SSR").is_ok();

let driven_by_cargo_leptos = std::env::var("LEPTOS_OUTPUT_NAME").is_ok();

if ssr_enabled && !echarts.exists() {

println!(

"cargo:warning=ECharts missing at {}. \

echarts.display()

);

}

if ssr_enabled && !assets_present && !driven_by_cargo_leptos {

println!(

"cargo:warning=Leptos hydration assets missing in {}. \

pkg_dir.display()

);

}

let code = if assets_present {

format!(

r#"

js.display(),

css.display(),

wasm.display(),

)

} else {

r#"

.to_string()

};

let code = code

+ &if echarts.exists() {

format!(

r#"

echarts.display(),

)

} else {

r#"

.to_string()

};

std::fs::write(&dest, code).unwrap();

println!("cargo:rerun-if-changed=target/site/pkg/transity.js");

println!("cargo:rerun-if-changed=target/site/pkg/transity.css");

println!("cargo:rerun-if-changed=target/site/pkg/transity.wasm");

println!("cargo:rerun-if-changed=node_modules/echarts/dist/echarts.min.js");

// bun copies files from its cache with their old mtimes, so a fresh

// install wouldn't trigger a rebuild. The package directory itself

// gets a current mtime when it's (re)installed.

println!("cargo:rerun-if-changed=node_modules/echarts");