//! Phase 04 (Track J.2) — SSTI corpus acceptance.
//!
//! Asserts the new cap end-to-end: corpus slices register per-engine
//! vuln/benign pairs (Python/Jinja2, Ruby/ERB, PHP/Twig, Java/Thymeleaf,
//! JS/Handlebars), the lang-aware resolver pairs them inside the
//! correct slice, the per-language harness emitters splice in the
//! synthetic template renderer + sink-hit sentinel, and the
//! framework adapters fire on the canonical sink call.
//!
//! `cargo nextest run --features dynamic --test ssti_corpus`.

#![cfg(feature = "dynamic")]

use nyx_scanner::dynamic::corpus::{
    audit_marker_collisions, benign_payload_for_lang, payloads_for_lang,
    resolve_benign_control_lang, Oracle,
};
use nyx_scanner::dynamic::framework::registry::adapters_for;
use nyx_scanner::dynamic::lang;
use nyx_scanner::dynamic::oracle::{oracle_fired, ProbePredicate};
use nyx_scanner::dynamic::sandbox::SandboxOutcome;
use nyx_scanner::dynamic::spec::{EntryKind, HarnessSpec, PayloadSlot};
use nyx_scanner::labels::Cap;
use nyx_scanner::summary::FuncSummary;
use nyx_scanner::symbol::Lang;
use std::time::Duration;

const LANGS: &[Lang] = &[
    Lang::Python,
    Lang::Ruby,
    Lang::Php,
    Lang::Java,
    Lang::JavaScript,
];

fn make_spec(lang: Lang, entry_file: &str, entry_name: &str) -> HarnessSpec {
    HarnessSpec {
        finding_id: "phase04test0001".into(),
        entry_file: entry_file.into(),
        entry_name: entry_name.into(),
        entry_kind: EntryKind::Function,
        lang,
        toolchain_id: "phase04".into(),
        payload_slot: PayloadSlot::Param(0),
        expected_cap: Cap::SSTI,
        constraint_hints: vec![],
        sink_file: entry_file.into(),
        sink_line: 1,
        spec_hash: "phase04test0001".into(),
        derivation: nyx_scanner::dynamic::spec::SpecDerivationStrategy::FromFlowSteps,
        stubs_required: vec![],
        framework: None,
    }
}

#[test]
fn corpus_registers_ssti_for_every_supported_lang() {
    for lang in LANGS {
        let slice = payloads_for_lang(Cap::SSTI, *lang);
        assert!(!slice.is_empty(), "SSTI has no payloads for {lang:?}");
        let has_vuln = slice.iter().any(|p| !p.is_benign);
        let has_benign = slice.iter().any(|p| p.is_benign);
        assert!(has_vuln, "{lang:?} SSTI missing vuln payload");
        assert!(has_benign, "{lang:?} SSTI missing benign control");
    }
}

#[test]
fn ssti_unsupported_caps_unchanged_for_other_langs() {
    // Phase 04 only fills Python/Ruby/PHP/Java/JS — TypeScript / Rust /
    // C / Cpp / Go remain empty.
    for lang in [
        Lang::Rust,
        Lang::C,
        Lang::Cpp,
        Lang::Go,
        Lang::TypeScript,
    ] {
        assert!(
            payloads_for_lang(Cap::SSTI, lang).is_empty(),
            "unexpected SSTI payloads registered for {lang:?}",
        );
    }
}

#[test]
fn benign_control_resolves_within_lang_slice() {
    for lang in LANGS {
        let slice = payloads_for_lang(Cap::SSTI, *lang);
        let vuln = slice.iter().find(|p| !p.is_benign).unwrap();
        let resolved =
            resolve_benign_control_lang(vuln, Cap::SSTI, *lang).expect("paired control");
        assert!(resolved.is_benign);
        let direct = benign_payload_for_lang(Cap::SSTI, *lang).unwrap();
        assert_eq!(direct.label, resolved.label);
    }
}

#[test]
fn payload_oracle_carries_template_eval_predicate() {
    for lang in LANGS {
        let slice = payloads_for_lang(Cap::SSTI, *lang);
        let vuln = slice.iter().find(|p| !p.is_benign).unwrap();
        match &vuln.oracle {
            Oracle::SinkProbe { predicates } => {
                let has_predicate = predicates.iter().any(|p| {
                    matches!(p, ProbePredicate::TemplateEvalEqual { expected: 49 })
                });
                assert!(
                    has_predicate,
                    "{lang:?} vuln payload missing TemplateEvalEqual{{expected:49}}",
                );
            }
            other => panic!("expected SinkProbe oracle for {lang:?}, got {other:?}"),
        }
    }
}

#[test]
fn marker_collisions_clean_with_phase_04_additions() {
    assert!(audit_marker_collisions().is_empty());
}

#[test]
fn template_eval_equal_fires_on_render_49_json() {
    // The oracle parses the harness's stdout body as JSON; a vuln
    // payload run that renders `49` satisfies the predicate.
    let oracle = Oracle::SinkProbe {
        predicates: &[ProbePredicate::TemplateEvalEqual { expected: 49 }],
    };
    let outcome = SandboxOutcome {
        exit_code: Some(0),
        stdout: br#"__NYX_SINK_HIT__
{"render":"49"}
"#
        .to_vec(),
        stderr: vec![],
        timed_out: false,
        oob_callback_seen: false,
        sink_hit: true,
        duration: Duration::from_millis(1),
        hardening_outcome: None,
    };
    assert!(oracle_fired(&oracle, &outcome, &[]));
}

#[test]
fn template_eval_equal_does_not_fire_on_echo_render() {
    // The benign payload echoes literal `7*7`; the integer parse
    // fails so the predicate does not satisfy.
    let oracle = Oracle::SinkProbe {
        predicates: &[ProbePredicate::TemplateEvalEqual { expected: 49 }],
    };
    let outcome = SandboxOutcome {
        exit_code: Some(0),
        stdout: br#"__NYX_SINK_HIT__
{"render":"7*7"}
"#
        .to_vec(),
        stderr: vec![],
        timed_out: false,
        oob_callback_seen: false,
        sink_hit: true,
        duration: Duration::from_millis(1),
        hardening_outcome: None,
    };
    assert!(!oracle_fired(&oracle, &outcome, &[]));
}

#[test]
fn lang_emitter_dispatches_to_ssti_harness() {
    for (lang, entry_file, entry_name, marker) in [
        (
            Lang::Python,
            "tests/dynamic_fixtures/ssti/python_jinja2/vuln.py",
            "run",
            "_nyx_jinja2_render",
        ),
        (
            Lang::Ruby,
            "tests/dynamic_fixtures/ssti/ruby_erb/vuln.rb",
            "run",
            "_nyx_erb_render",
        ),
        (
            Lang::Php,
            "tests/dynamic_fixtures/ssti/php_twig/vuln.php",
            "run",
            "_nyx_twig_render",
        ),
        (
            Lang::Java,
            "tests/dynamic_fixtures/ssti/java_thymeleaf/vuln.java",
            "run",
            "nyxThymeleafRender",
        ),
        (
            Lang::JavaScript,
            "tests/dynamic_fixtures/ssti/js_handlebars/vuln.js",
            "run",
            "nyxHandlebarsRender",
        ),
    ] {
        let spec = make_spec(lang, entry_file, entry_name);
        let harness = lang::emit(&spec)
            .unwrap_or_else(|e| panic!("emit failed for {lang:?}: {e:?}"));
        assert!(
            harness.source.contains(marker),
            "{lang:?} ssti harness must splice {marker:?}",
        );
        assert!(
            harness.source.contains("__NYX_SINK_HIT__"),
            "{lang:?} ssti harness must emit the sink-hit sentinel",
        );
        assert!(
            harness.source.contains("render"),
            "{lang:?} ssti harness must print the render JSON field",
        );
    }
}

#[test]
fn framework_adapters_detect_ssti_sink() {
    // Each lang registers its J.2 SSTI sink adapter; detect_binding
    // routes through the registry and stamps an EntryKind::Function
    // binding when the fixture contains the canonical sink call.
    for (lang, fixture) in [
        (
            Lang::Python,
            "tests/dynamic_fixtures/ssti/python_jinja2/vuln.py",
        ),
        (Lang::Ruby, "tests/dynamic_fixtures/ssti/ruby_erb/vuln.rb"),
        (Lang::Php, "tests/dynamic_fixtures/ssti/php_twig/vuln.php"),
        (
            Lang::Java,
            "tests/dynamic_fixtures/ssti/java_thymeleaf/vuln.java",
        ),
        (
            Lang::JavaScript,
            "tests/dynamic_fixtures/ssti/js_handlebars/vuln.js",
        ),
    ] {
        let bytes = std::fs::read(fixture).expect("fixture exists");
        let ts_lang = ts_language_for(lang);
        let mut parser = tree_sitter::Parser::new();
        parser.set_language(&ts_lang).unwrap();
        let tree = parser.parse(&bytes, None).unwrap();
        let mut summary = FuncSummary {
            name: "run".into(),
            file_path: fixture.to_owned(),
            lang: slug(lang).into(),
            ..Default::default()
        };
        // Seed the canonical sink callee per language so the
        // callee-side matcher fires alongside the source-side check.
        let sink_callee = match lang {
            Lang::Python => "Template",
            Lang::Ruby => "new",
            Lang::Php => "createTemplate",
            Lang::Java => "process",
            Lang::JavaScript => "compile",
            _ => unreachable!(),
        };
        summary
            .callees
            .push(nyx_scanner::summary::CalleeSite::bare(sink_callee));
        let registry_slice = adapters_for(lang);
        assert!(!registry_slice.is_empty(), "{lang:?} adapter slice empty");
        let binding =
            nyx_scanner::dynamic::framework::detect_binding(&summary, tree.root_node(), &bytes, lang);
        let b =
            binding.unwrap_or_else(|| panic!("{lang:?} adapter must detect the SSTI fixture"));
        assert_eq!(b.kind, EntryKind::Function);
        assert!(!b.adapter.is_empty());
    }
}

fn ts_language_for(lang: Lang) -> tree_sitter::Language {
    match lang {
        Lang::Python => tree_sitter::Language::from(tree_sitter_python::LANGUAGE),
        Lang::Ruby => tree_sitter::Language::from(tree_sitter_ruby::LANGUAGE),
        Lang::Php => tree_sitter::Language::from(tree_sitter_php::LANGUAGE_PHP),
        Lang::Java => tree_sitter::Language::from(tree_sitter_java::LANGUAGE),
        Lang::JavaScript => {
            tree_sitter::Language::from(tree_sitter_javascript::LANGUAGE)
        }
        other => panic!("unsupported test lang {other:?}"),
    }
}

fn slug(lang: Lang) -> &'static str {
    match lang {
        Lang::Python => "python",
        Lang::Ruby => "ruby",
        Lang::Php => "php",
        Lang::Java => "java",
        Lang::JavaScript => "javascript",
        _ => "other",
    }
}