//! `pic apply --prune` journey: a resource dropped from the manifest
//! survives a plain (additive) apply but is deleted with `--prune`.

use std::fs;

use tempfile::TempDir;

use crate::common;
use crate::common::cleanup::AppGuard;

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

#[ignore = "needs DATABASE_URL pointing at a running Postgres"]
#[test]
fn prune_deletes_stale_resources() {
    let Some(fx) = common::fixture_or_skip() else {
        return;
    };
    let env = common::admin_env(fx);
    let slug = common::unique_slug("prune");
    common::pic_as(&env)
        .args(["apps", "create", &slug])
        .assert()
        .success();
    let _guard = AppGuard::new(&env.url, &env.token, &slug);

    let dir = TempDir::new().unwrap();
    fs::create_dir_all(dir.path().join("scripts")).unwrap();
    fs::write(dir.path().join("scripts/keep.rhai"), "let x = 1; x").unwrap();
    fs::write(dir.path().join("scripts/drop.rhai"), "let y = 2; y").unwrap();
    let manifest_path = dir.path().join("picloud.toml");

    // v1: two scripts + a route on `drop`.
    let v1 = format!(
        "[app]\nslug = \"{slug}\"\nname = \"Prune Test\"\n\n\
         [[scripts]]\nname = \"keep\"\nfile = \"scripts/keep.rhai\"\n\n\
         [[scripts]]\nname = \"drop\"\nfile = \"scripts/drop.rhai\"\n\n\
         [[routes]]\nscript = \"drop\"\nmethod = \"GET\"\n\
         host_kind = \"any\"\npath_kind = \"exact\"\npath = \"/drop\"\n"
    );
    fs::write(&manifest_path, &v1).unwrap();
    common::pic_as(&env)
        .args(["apply", "--file"])
        .arg(&manifest_path)
        .assert()
        .success();

    // v2: drop `drop` and its route.
    let v2 = format!(
        "[app]\nslug = \"{slug}\"\nname = \"Prune Test\"\n\n\
         [[scripts]]\nname = \"keep\"\nfile = \"scripts/keep.rhai\"\n"
    );
    fs::write(&manifest_path, &v2).unwrap();

    // Plain apply is additive — `drop` survives.
    common::pic_as(&env)
        .args(["apply", "--file"])
        .arg(&manifest_path)
        .assert()
        .success();
    assert!(
        scripts_ls(&env, &slug).contains("drop"),
        "additive apply must not delete"
    );

    // Prune apply removes `drop` and its route.
    let out = common::pic_as(&env)
        .args(["apply", "--file"])
        .arg(&manifest_path)
        .arg("--prune")
        .output()
        .expect("apply --prune");
    assert!(
        out.status.success(),
        "prune failed: {}",
        String::from_utf8_lossy(&out.stderr)
    );
    let report = String::from_utf8(out.stdout).unwrap();
    assert!(
        report.contains("-1"),
        "expected deletions in report:\n{report}"
    );

    let s = scripts_ls(&env, &slug);
    assert!(!s.contains("drop"), "prune should delete `drop`:\n{s}");
    assert!(s.contains("keep"), "prune must keep `keep`:\n{s}");

    // Plan is clean after prune.
    let p = String::from_utf8(
        common::pic_as(&env)
            .args(["plan", "--file"])
            .arg(&manifest_path)
            .output()
            .unwrap()
            .stdout,
    )
    .unwrap();
    assert!(
        !p.contains("delete"),
        "plan should be clean after prune:\n{p}"
    );
}