//! The `block.*` commands: list, move, duplicate, delete and turn into, each one edit on disk.

mod common;

use common::{on_disk, seed, temp_vault};
use notescraft_engine::{Registry, Session, register_core};
use serde_json::{Value, json};

const NOTE: &str = "# Title\n\nFirst para\n\nSecond para\n";

fn setup(name: &str) -> (Registry<Session>, Session, common::TempVault) {
    let vault = temp_vault(name);
    seed(vault.path(), &[("n.md", NOTE)]);
    let mut registry = Registry::new();
    register_core(&mut registry).expect("register");
    let session = Session::open(vault.path()).expect("open");
    (registry, session, vault)
}

fn run(registry: &Registry<Session>, session: &mut Session, id: &str, params: &Value) -> Value {
    registry.run(id, session, params).unwrap_or_else(|error| panic!("{id}: {error:?}"))
}

#[test]
fn list_reports_every_top_level_block() {
    let (registry, mut session, _vault) = setup("block-list");
    let result = run(&registry, &mut session, "block.list", &json!({ "path": "n.md" }));
    assert_eq!(result["blocks"].as_array().expect("blocks").len(), 3);
}

#[test]
fn move_swaps_with_the_neighbour_and_is_undone_by_moving_back() {
    let (registry, mut session, vault) = setup("block-move");
    run(&registry, &mut session, "block.move", &json!({ "path": "n.md", "index": 2, "direction": "up" }));
    assert_eq!(on_disk(vault.path(), "n.md"), "# Title\n\nSecond para\n\nFirst para\n");
    run(&registry, &mut session, "block.move", &json!({ "path": "n.md", "index": 1, "direction": "down" }));
    assert_eq!(on_disk(vault.path(), "n.md"), NOTE);
}

#[test]
fn duplicate_delete_and_turn_into_change_one_block() {
    let (registry, mut session, vault) = setup("block-edit");
    run(&registry, &mut session, "block.turn_into", &json!({ "path": "n.md", "index": 1, "target": "heading2" }));
    assert!(on_disk(vault.path(), "n.md").contains("## First para"));
    run(&registry, &mut session, "block.duplicate", &json!({ "path": "n.md", "index": 2 }));
    assert_eq!(on_disk(vault.path(), "n.md").matches("Second para").count(), 2);
    run(&registry, &mut session, "block.delete", &json!({ "path": "n.md", "index": 3 }));
    assert_eq!(on_disk(vault.path(), "n.md").matches("Second para").count(), 1);
}

#[test]
fn hostile_input_is_refused_not_applied() {
    let (registry, mut session, vault) = setup("block-hostile");
    for params in [
        json!({ "path": "n.md", "index": 99, "direction": "up" }),
        json!({ "path": "n.md", "index": 0, "direction": "left" }),
        json!({ "path": "../x.md", "index": 0, "direction": "up" }),
    ] {
        assert!(registry.run("block.move", &mut session, &params).is_err(), "{params}");
    }
    assert!(registry.run("block.turn_into", &mut session, &json!({ "path": "n.md", "index": 1, "target": "heading9" })).is_err());
    assert_eq!(on_disk(vault.path(), "n.md"), NOTE);
}

const JSON_NOTE: &str = "# T\n\n```json\n{\"b\":1,\"a\":[1e5]}\n```\n";

#[test]
fn json_format_and_minify_rewrite_only_the_block_body() {
    let vault = temp_vault("json-block");
    seed(vault.path(), &[("j.md", JSON_NOTE)]);
    let mut registry = Registry::new();
    register_core(&mut registry).expect("register");
    let mut session = Session::open(vault.path()).expect("open");
    let result = run(&registry, &mut session, "json.format_block", &json!({ "path": "j.md", "index": 1 }));
    assert_eq!(result["changed"], json!(true));
    assert_eq!(on_disk(vault.path(), "j.md"), "# T\n\n```json\n{\n  \"b\": 1,\n  \"a\": [\n    1e5\n  ]\n}\n```\n");
    run(&registry, &mut session, "json.minify_block", &json!({ "path": "j.md", "index": 1 }));
    assert_eq!(on_disk(vault.path(), "j.md"), JSON_NOTE);
}

#[test]
fn invalid_json_is_an_error_and_the_note_is_untouched() {
    let vault = temp_vault("json-invalid");
    let broken = "```json\n{\"a\":\n```\n";
    seed(vault.path(), &[("j.md", broken), ("p.md", "plain\n")]);
    let mut registry = Registry::new();
    register_core(&mut registry).expect("register");
    let mut session = Session::open(vault.path()).expect("open");
    assert!(registry.run("json.format_block", &mut session, &json!({ "path": "j.md", "index": 0 })).is_err());
    assert_eq!(on_disk(vault.path(), "j.md"), broken);
    assert!(registry.run("json.format_block", &mut session, &json!({ "path": "p.md", "index": 0 })).is_err());
    assert_eq!(on_disk(vault.path(), "p.md"), "plain\n");
}