use brick::scan;
use serde_json::Value;
use std::fs;
use std::path::Path;
use std::process::Command;

fn fixture(name: &str) -> String {
    Path::new(env!("CARGO_MANIFEST_DIR"))
        .join("tests/fixtures/policy")
        .join(name)
        .display()
        .to_string()
}

#[test]
fn check_evaluates_policy_with_complete_evidence_and_clean_negative() {
    let directory = tempfile::tempdir().unwrap();
    let project = directory.path().join("project");
    fs::create_dir_all(project.join("src/api")).unwrap();
    fs::create_dir_all(project.join("src/storage")).unwrap();
    fs::write(
        project.join("src/api/handler.rs"),
        "fn handle() { crate::storage::db::query(); }\n",
    )
    .unwrap();
    fs::write(project.join("src/storage/db.rs"), "pub fn query() {}\n").unwrap();
    let model = scan::scan(&project).unwrap();
    let graph = directory.path().join("graph.json");
    fs::write(&graph, serde_json::to_vec_pretty(&model).unwrap()).unwrap();

    let violation_result = directory.path().join("violation-result.json");
    let violating = Command::new(env!("CARGO_BIN_EXE_brick"))
        .args([
            "check",
            graph.to_str().unwrap(),
            "--min-score",
            "101",
            "--policy",
            &fixture("forbid-api-storage.json"),
            "--policy-result-json",
            violation_result.to_str().unwrap(),
        ])
        .output()
        .unwrap();
    assert!(!violating.status.success());
    let violation_stderr = String::from_utf8_lossy(&violating.stderr);
    assert!(violation_stderr.contains("score"));
    assert!(violation_stderr.contains("api-must-not-call-storage matched 1 dependencies; max 0"));
    let result: Value = serde_json::from_slice(&fs::read(violation_result).unwrap()).unwrap();
    assert_eq!(result["policy_result_schema_version"], 1);
    assert_eq!(result["policy_schema_version"], 1);
    assert_eq!(result["building_schema_version"], 4);
    assert_eq!(result["passed"], false);
    assert_eq!(
        result["rules"][0]["matched_edges"]
            .as_array()
            .unwrap()
            .len(),
        1
    );
    assert_eq!(
        result["rules"][0]["matched_edges"][0]["edge"]["evidence"][0]["backend"],
        "tree-sitter-rust:0.24.2:brick-source-v1:heuristic-resolver-v2"
    );

    let clean_result = directory.path().join("clean-result.json");
    let clean = Command::new(env!("CARGO_BIN_EXE_brick"))
        .args([
            "check",
            graph.to_str().unwrap(),
            "--min-score",
            "0",
            "--policy",
            &fixture("clean-ui-storage.json"),
            "--policy-result-json",
            clean_result.to_str().unwrap(),
        ])
        .output()
        .unwrap();
    assert!(
        clean.status.success(),
        "{}",
        String::from_utf8_lossy(&clean.stderr)
    );
    let clean_value: Value = serde_json::from_slice(&fs::read(clean_result).unwrap()).unwrap();
    assert_eq!(clean_value["passed"], true);
    assert!(
        clean_value["rules"][0]["matched_edges"]
            .as_array()
            .unwrap()
            .is_empty()
    );
}

#[test]
fn check_rejects_policy_output_without_policy_and_unknown_wire_values() {
    let directory = tempfile::tempdir().unwrap();
    fs::write(directory.path().join("lib.rs"), "fn example() {}\n").unwrap();
    let graph = directory.path().join("graph.json");
    fs::write(
        &graph,
        serde_json::to_vec_pretty(&scan::scan(directory.path()).unwrap()).unwrap(),
    )
    .unwrap();

    let missing = Command::new(env!("CARGO_BIN_EXE_brick"))
        .args([
            "check",
            graph.to_str().unwrap(),
            "--min-score",
            "0",
            "--policy-result-json",
            directory.path().join("result.json").to_str().unwrap(),
        ])
        .output()
        .unwrap();
    assert!(!missing.status.success());
    assert!(String::from_utf8_lossy(&missing.stderr).contains("requires --policy"));

    for invalid in ["invalid-unknown-kind.json", "invalid-unknown-key.json"] {
        let output = Command::new(env!("CARGO_BIN_EXE_brick"))
            .args([
                "check",
                graph.to_str().unwrap(),
                "--min-score",
                "0",
                "--policy",
                &fixture(invalid),
            ])
            .output()
            .unwrap();
        assert!(!output.status.success(), "{invalid}");
        assert!(String::from_utf8_lossy(&output.stderr).contains("invalid architecture policy"));
    }
}