//! Eq-primitive codegen pin tests, relocated from
//! `ailang-codegen/src/lib.rs` `#[cfg(test)] mod tests` to a `tests/*`
//! integration crate in iter form-a.1 Task 5. The relocation switches
//! workspace loading from `ailang_core::load_workspace` (the JSON-only
//! loader) to `ailang_surface::load_workspace` (the
//! extension-dispatching superset), so the post-iter `.ail` corpus is
//! loaded from Form A rather than the deleted `.ail.json` siblings.

use ailang_check::{check_workspace, monomorphise_workspace, Severity};
use ailang_codegen::lower_workspace;
use ailang_surface::load_workspace;
use std::path::Path;

fn eq_primitives_smoke_path() -> std::path::PathBuf {
    let manifest = env!("CARGO_MANIFEST_DIR");
    Path::new(manifest)
        .parent().unwrap().parent().unwrap()
        .join("examples").join("eq_primitives_smoke.ail")
}

fn lower_eq_primitives_smoke() -> String {
    let entry = eq_primitives_smoke_path();
    let ws = load_workspace(&entry).expect("load workspace");
    let diags = check_workspace(&ws);
    assert!(
        diags.iter().all(|d| !matches!(d.severity, Severity::Error)),
        "unexpected check_workspace errors: {diags:?}"
    );
    let ws = monomorphise_workspace(&ws).expect("monomorphise");
    lower_workspace(&ws).expect("lower")
}

/// Iter 23.2: integration with the auto-loaded prelude. Compiling a
/// workspace that calls `eq` on an Int pair must produce a
/// mono-synthesised `@ail_prelude_eq__Int` whose body lowers to
/// `icmp eq i64`. Full pipeline: end-of-typecheck → monomorphise →
/// codegen, then substring-shape assertions on the IR.
#[test]
fn eq_int_call_produces_icmp_i64_mono_fn() {
    let ir = lower_eq_primitives_smoke();
    assert!(
        ir.contains("@ail_prelude_eq__Int"),
        "ir must contain mono-synthesised @ail_prelude_eq__Int; ir was:\n{ir}"
    );
    assert!(
        ir.contains("icmp eq i64"),
        "eq__Int body must lower to icmp eq i64; ir was:\n{ir}"
    );
}

/// Iter 23.2: same shape as `eq_int_call_produces_icmp_i64_mono_fn`
/// for Bool. Asserts the mono-synthesised `@ail_prelude_eq__Bool`
/// lowers to `icmp eq i1`.
#[test]
fn eq_bool_call_produces_icmp_i1_mono_fn() {
    let ir = lower_eq_primitives_smoke();
    assert!(
        ir.contains("@ail_prelude_eq__Bool"),
        "ir must contain mono-synthesised @ail_prelude_eq__Bool; ir was:\n{ir}"
    );
    assert!(
        ir.contains("icmp eq i1"),
        "eq__Bool body must lower to icmp eq i1; ir was:\n{ir}"
    );
}

/// Iter 23.2: Str's mono-symbol body is hand-rolled by the
/// `try_emit_primitive_instance_body` intercept. Asserts the intercept
/// fires for the prelude-loaded `eq__Str` synthesised against a real
/// user fixture that calls `eq` on Str.
#[test]
fn eq_str_call_produces_ail_str_eq_call_mono_fn() {
    let ir = lower_eq_primitives_smoke();
    assert!(
        ir.contains("@ail_prelude_eq__Str"),
        "ir must contain mono-synthesised @ail_prelude_eq__Str; ir was:\n{ir}"
    );
    assert!(
        ir.contains("call zeroext i1 @ail_str_eq("),
        "eq__Str body must call @ail_str_eq; ir was:\n{ir}"
    );
}