//! M2 declarative tree SHAPE via `pic apply --dir`:
//!   * a group manifest for a group that does NOT exist yet is CREATED under
//!     its declared parent, with its content, in one atomic apply,
//!   * re-applying the same tree is a no-op (the group now exists),
//!   * changing the declared parent REPARENTS the group on the next apply.

use std::fs;

use tempfile::TempDir;

use crate::common;
use crate::common::cleanup::{GroupGuard, ScriptGuard};

/// Write a single-group project dir declaring group `slug` under `parent` with
/// one endpoint script.
fn group_dir(slug: &str, parent: &str) -> TempDir {
    let dir = TempDir::new().expect("tempdir");
    fs::create_dir_all(dir.path().join("scripts")).unwrap();
    fs::write(dir.path().join("scripts/hello.rhai"), r#""hi""#).unwrap();
    fs::write(
        dir.path().join("picloud.toml"),
        format!(
            "[group]\nslug = \"{slug}\"\nname = \"Child Group\"\nparent = \"{parent}\"\n\n\
             [[scripts]]\nname = \"hello\"\nfile = \"scripts/hello.rhai\"\n"
        ),
    )
    .unwrap();
    dir
}

#[ignore = "needs DATABASE_URL pointing at a running Postgres"]
#[test]
fn tree_apply_creates_then_reparents_a_group() {
    let Some(fx) = common::fixture_or_skip() else {
        return;
    };
    let env = common::admin_env(fx);
    let parent = common::unique_slug("ts-par");
    let child = common::unique_slug("ts-child");

    // Guards drop in reverse order: parent (last) ← child (mid) ← script (first).
    let _gp = GroupGuard::new(&env.url, &env.token, &parent);
    let _gc = GroupGuard::new(&env.url, &env.token, &child);
    common::pic_as(&env)
        .args(["groups", "create", &parent])
        .assert()
        .success();

    // --- Create: the child group does NOT exist; apply --dir creates it. ---
    let dir = group_dir(&child, &parent);
    let out = common::pic_as(&env)
        .args(["apply", "--dir"])
        .arg(dir.path())
        .output()
        .expect("apply --dir");
    assert!(
        out.status.success(),
        "tree apply (create) failed: {}",
        String::from_utf8_lossy(&out.stderr)
    );

    // The group now exists with its script.
    let groups = ls(&env, &["groups", "ls"]);
    assert!(groups.contains(&child), "created group missing:\n{groups}");
    let scripts = ls(&env, &["scripts", "ls", "--group", &child]);
    let script_id = scripts
        .lines()
        .map(common::cells)
        .find(|c| c.get(2) == Some(&"hello"))
        .and_then(|c| c.first().map(|s| (*s).to_string()))
        .unwrap_or_else(|| panic!("group script `hello` should exist:\n{scripts}"));
    let _gs = ScriptGuard::new(&env.url, &env.token, &script_id);

    // Re-applying the same tree is a no-op (group + content unchanged).
    let plan_out = common::pic_as(&env)
        .args(["plan", "--dir"])
        .arg(dir.path())
        .output()
        .expect("plan --dir");
    let plan_txt = String::from_utf8_lossy(&plan_out.stdout).to_lowercase();
    assert!(
        !plan_txt.contains("create") && !plan_txt.contains("delete"),
        "re-plan of an applied tree must be a no-op:\n{plan_txt}"
    );

    // --- Reparent: move the child under the instance root. Rewrite the SAME
    // repo's manifest (M3: a stable `.picloud/` project key per repo — a fresh
    // dir would be a different project and conflict on the owned group). ---
    fs::write(
        dir.path().join("picloud.toml"),
        format!(
            "[group]\nslug = \"{child}\"\nname = \"Child Group\"\nparent = \"root\"\n\n\
             [[scripts]]\nname = \"hello\"\nfile = \"scripts/hello.rhai\"\n"
        ),
    )
    .unwrap();
    let dir2 = &dir;
    let out = common::pic_as(&env)
        .args(["apply", "--dir"])
        .arg(dir2.path())
        .output()
        .expect("apply --dir reparent");
    assert!(
        out.status.success(),
        "tree apply (reparent) failed: {}",
        String::from_utf8_lossy(&out.stderr)
    );
    // Re-plan is a no-op now that the parent matches.
    let plan_out = common::pic_as(&env)
        .args(["plan", "--dir"])
        .arg(dir2.path())
        .output()
        .expect("plan --dir after reparent");
    let plan_txt = String::from_utf8_lossy(&plan_out.stdout).to_lowercase();
    assert!(
        !plan_txt.contains("create") && !plan_txt.contains("delete"),
        "re-plan after reparent must be a no-op:\n{plan_txt}"
    );
}

fn ls(env: &common::TestEnv, args: &[&str]) -> String {
    String::from_utf8(common::pic_as(env).args(args).output().expect("ls").stdout).unwrap()
}