//! 通过真实 CLI 验证规则来源、原子合并及拒绝输入；只操作独占临时项目。

use super::{Directory, success};
use std::os::unix::fs::{MetadataExt, PermissionsExt, symlink};
use std::path::Path;
use std::process::{Command, Output};

fn cli(root: &Path, arguments: &[&str]) -> Output {
    Command::new(env!("CARGO_BIN_EXE_dever"))
        .current_dir(root)
        .args(arguments)
        .output()
        .unwrap()
}

fn template() -> String {
    std::fs::read_to_string(
        Path::new(env!("CARGO_MANIFEST_DIR")).join("../skills/assets/template/AGENTS.md"),
    )
    .unwrap()
}

#[test]
fn path_uses_current_toolchain_without_project_version_or_mutation() {
    let directory = Directory::new();
    let root = directory.0.join("app");
    dever::compiler::project::create(&root).unwrap();
    let settings = root.join("config/setting.json");
    let original = std::fs::read(&settings).unwrap();
    let value: serde_json::Value = serde_json::from_slice(&original).unwrap();
    assert!(value.get("dever").is_none());
    let agents = std::fs::read(root.join("AGENTS.md")).unwrap();
    let expected = Path::new(env!("CARGO_MANIFEST_DIR"))
        .join("../skills")
        .canonicalize()
        .unwrap();
    for (cwd, arguments) in [
        (root.as_path(), vec!["skill", "path", "."]),
        (root.as_path(), vec!["skill", "path"]),
        (directory.0.as_path(), vec!["skill", "path"]),
    ] {
        assert_eq!(
            success(cli(cwd, &arguments)).trim(),
            expected.to_str().unwrap()
        );
    }
    assert_eq!(std::fs::read(&settings).unwrap(), original);
    assert_eq!(std::fs::read(root.join("AGENTS.md")).unwrap(), agents);
    // 查询与安装都不创建项目配置，更不引入项目版本锁定。
    std::fs::remove_file(&settings).unwrap();
    success(cli(&root, &["skill", "path", "."]));
    success(cli(&root, &["skill", "install"]));
    assert!(!settings.exists());
    assert!(!cli(&directory.0, &["skill", "path", "."]).status.success());
    assert!(!cli(&directory.0, &["skill", "install"]).status.success());
    assert!(!directory.0.join("AGENTS.md").exists());
    assert!(!cli(&root, &["skill", "install", "."]).status.success());
}

#[test]
fn install_preserves_unmarked_content_permissions_and_is_idempotent() {
    let directory = Directory::new();
    let root = directory.0.join("app");
    dever::compiler::project::create(&root).unwrap();
    let agents = root.join("AGENTS.md");
    std::fs::remove_file(&agents).unwrap();
    success(cli(&root, &["skill", "install"]));
    assert_eq!(std::fs::read_to_string(&agents).unwrap(), template());
    assert_eq!(std::fs::metadata(&agents).unwrap().mode() & 0o777, 0o644);

    let prefix = "# 项目规则\r\n保留这些内容。";
    std::fs::write(&agents, prefix).unwrap();
    std::fs::set_permissions(&agents, std::fs::Permissions::from_mode(0o640)).unwrap();
    success(cli(&root, &["skill", "install"]));
    let installed = format!("{prefix}\n\n{}", template());
    assert_eq!(std::fs::read_to_string(&agents).unwrap(), installed);
    let before = std::fs::metadata(&agents).unwrap();
    assert_eq!(before.mode() & 0o777, 0o640);
    success(cli(&root, &["skill", "install"]));
    let after = std::fs::metadata(&agents).unwrap();
    assert_eq!(std::fs::read_to_string(&agents).unwrap(), installed);
    assert_eq!(before.ino(), after.ino());
    assert_eq!(before.modified().unwrap(), after.modified().unwrap());

    let prefix = "保留头部\r\n\r\n";
    let suffix = "\r\n\r\n保留尾部\r\n";
    std::fs::write(
        &agents,
        format!(
            "{prefix}<!-- dever-language:start -->\r\n旧规则\r\n<!-- dever-language:end -->{suffix}"
        ),
    )
    .unwrap();
    success(cli(&root, &["skill", "install"]));
    assert_eq!(
        std::fs::read_to_string(&agents).unwrap(),
        format!("{prefix}{}{suffix}", template().trim_end_matches('\n'))
    );

    // 同一项目的并发安装不得附加两份规则或留下暂存文件。
    std::fs::remove_file(&agents).unwrap();
    let mut first = Command::new(env!("CARGO_BIN_EXE_dever"))
        .current_dir(&root)
        .args(["skill", "install"])
        .stdout(std::process::Stdio::null())
        .spawn()
        .unwrap();
    success(cli(&root, &["skill", "install"]));
    assert!(first.wait().unwrap().success());
    assert_eq!(std::fs::read_to_string(&agents).unwrap(), template());
    assert!(!std::fs::read_dir(&root).unwrap().any(|entry| {
        entry
            .unwrap()
            .file_name()
            .to_string_lossy()
            .starts_with(".dever-skill-")
    }));
}

#[test]
fn install_rejects_malformed_markers_and_links_without_mutation() {
    let directory = Directory::new();
    let root = directory.0.join("app");
    dever::compiler::project::create(&root).unwrap();
    let agents = root.join("AGENTS.md");
    let start = "<!-- dever-language:start -->";
    let end = "<!-- dever-language:end -->";
    for text in [
        start.to_owned(),
        end.to_owned(),
        format!("{end}\n{start}"),
        format!("{start}\n{end}\n{start}\n{end}"),
        format!("{start}\n{start}\n{end}"),
        format!("{start}\n{end}\n{end}"),
        "<!-- dever-language:unknown -->".into(),
        format!("inline {start}\n{end}"),
    ] {
        std::fs::write(&agents, &text).unwrap();
        assert!(
            !cli(&root, &["skill", "install"]).status.success(),
            "{text}"
        );
        assert_eq!(std::fs::read_to_string(&agents).unwrap(), text);
    }
    std::fs::write(&agents, [0xff, 0xfe]).unwrap();
    assert!(!cli(&root, &["skill", "install"]).status.success());
    assert_eq!(std::fs::read(&agents).unwrap(), [0xff, 0xfe]);
    std::fs::remove_file(&agents).unwrap();
    let target = directory.0.join("private");
    std::fs::write(&target, "untouched").unwrap();
    symlink(&target, &agents).unwrap();
    assert!(!cli(&root, &["skill", "install"]).status.success());
    assert_eq!(std::fs::read_to_string(&target).unwrap(), "untouched");
    assert!(std::fs::symlink_metadata(&agents).unwrap().is_symlink());
    std::fs::remove_file(&agents).unwrap();
    std::fs::create_dir(&agents).unwrap();
    assert!(!cli(&root, &["skill", "install"]).status.success());
    assert!(agents.is_dir());
    let linked = directory.0.join("linked");
    symlink(&root, &linked).unwrap();
    assert!(
        !cli(&directory.0, &["skill", "path", linked.to_str().unwrap()])
            .status
            .success()
    );
    assert!(!std::fs::read_dir(&root).unwrap().any(|entry| {
        entry
            .unwrap()
            .file_name()
            .to_string_lossy()
            .starts_with(".dever-skill-")
    }));
}