//! Integration tests on the demo project: load, render every view, export,
//! check, document operations through a Workspace, MCP round trips.

use isokit_project::mcp;
use isokit_project::ops::Op;
use isokit_project::workspace::Workspace;
use isokit_project::{check, page, Project};
use serde_json::{json, Value};
use std::path::{Path, PathBuf};

fn demo() -> PathBuf {
    Path::new(env!("CARGO_MANIFEST_DIR")).join("../../examples/demo")
}

/// A throwaway copy of the demo (tests edit it).
fn copy_demo(name: &str) -> PathBuf {
    let dst = std::env::temp_dir().join(format!("isokit-test-{name}-{}", std::process::id()));
    let _ = std::fs::remove_dir_all(&dst);
    fn cp(a: &Path, b: &Path) {
        std::fs::create_dir_all(b).unwrap();
        for e in std::fs::read_dir(a).unwrap().flatten() {
            let p = e.path();
            let n = e.file_name();
            if p.is_dir() {
                if n != "dist" {
                    cp(&p, &b.join(n));
                }
            } else {
                std::fs::copy(&p, b.join(n)).unwrap();
            }
        }
    }
    cp(&demo(), &dst);
    dst
}

#[test]
fn demo_renders_every_view_cleanly() {
    let p = Project::load(demo()).unwrap();
    assert!(p.runtime.is_ok(), "{:?}", p.runtime.as_ref().err());
    for l in p.manifest.levels() {
        for rot in 0..4 {
            let v = p.render(&l.id, rot, None, false).unwrap();
            assert!(v.warnings.is_empty(), "{}/{rot}: {:?}", l.id, v.warnings);
            assert!(!v.html.contains("NaN"));
            assert!(
                v.nodes < p.manifest.build.budget,
                "{}/{rot}: {} nodes",
                l.id,
                v.nodes
            );
            for o in &p.doc.objects {
                assert!(
                    v.boxes.contains_key(&o.id),
                    "{} not drawn in {}/{rot}",
                    o.id,
                    l.id
                );
                assert!(v.info.contains_key(&o.id), "{} has no tooltip", o.id);
            }
            // the script's sign and the project prefab are there
            assert!(v.html.contains("data-id=\"sign\""));
            assert!(v.html.contains("data-obj=\"kiosk\""));
        }
    }
}

#[test]
fn demo_passes_the_check() {
    let p = Project::load(demo()).unwrap();
    let f = check::check(&p);
    assert!(f.is_empty(), "{f:?}");
}

#[test]
fn static_page_and_svg_export() {
    let p = Project::load(demo()).unwrap();
    let html = page::static_page(&p).unwrap();
    assert!(
        html.contains("IsoKit.mount") && html.contains("\"site/1\"") && html.contains("\"gf/3\"")
    );
    assert!(
        !html.contains("/*ISOKIT_"),
        "a placeholder was left in the page"
    );
    assert!(
        html.contains(".iso-brick { --b: var(--iso-brick); }"),
        "project theme merged"
    );
    let svg = page::svg(&p, "site", 1, true).unwrap();
    assert!(
        svg.starts_with("<svg") && svg.contains("<style>") && svg.contains("iso-wall")
            || svg.contains("iso-render")
    );
}

#[test]
fn workspace_edits_save_and_undo() {
    let dir = copy_demo("ws");
    let mut ws = Workspace::open(&dir).unwrap();
    let n = ws.project.doc.objects.len();
    let id = ws
        .apply(
            serde_json::from_value::<Op>(json!({"op": "add", "type": "tree", "x": 1, "y": 2}))
                .unwrap(),
        )
        .unwrap()
        .id
        .unwrap();
    // saved to disk
    let on_disk = Project::load(&dir).unwrap();
    assert_eq!(on_disk.doc.objects.len(), n + 1);
    assert!(on_disk.doc.get(&id).is_some());
    ws.undo().unwrap();
    assert_eq!(Project::load(&dir).unwrap().doc.objects.len(), n);
    ws.redo().unwrap();
    assert_eq!(ws.project.doc.objects.len(), n + 1);
    // an outside edit (another process) is picked up and can be undone
    let mut d = on_disk.doc.clone();
    d.objects.retain(|o| o.kind != "lamp");
    std::fs::write(
        dir.join("scene.json"),
        serde_json::to_string_pretty(&d).unwrap(),
    )
    .unwrap();
    assert!(ws.refresh());
    assert!(ws.project.doc.objects.iter().all(|o| o.kind != "lamp"));
    ws.undo().unwrap();
    assert!(ws.project.doc.objects.iter().any(|o| o.kind == "lamp"));
    let _ = std::fs::remove_dir_all(&dir);
}

fn call(ws: &mut Workspace, id: u64, name: &str, args: Value) -> (bool, Value) {
    let r = mcp::handle(ws, &json!({"jsonrpc": "2.0", "id": id, "method": "tools/call", "params": {"name": name, "arguments": args}})).unwrap();
    let res = &r["result"];
    let text = res["content"][0]["text"]
        .as_str()
        .unwrap_or_default()
        .to_string();
    (
        res["isError"].as_bool().unwrap_or(true),
        serde_json::from_str(&text).unwrap_or(Value::String(text)),
    )
}

#[test]
fn mcp_round_trip() {
    let dir = copy_demo("mcp");
    let mut ws = Workspace::open(&dir).unwrap();
    let init = mcp::handle(&mut ws, &json!({"jsonrpc": "2.0", "id": 1, "method": "initialize", "params": {"protocolVersion": "2025-06-18"}})).unwrap();
    assert_eq!(init["result"]["protocolVersion"], "2025-06-18");
    assert!(mcp::handle(
        &mut ws,
        &json!({"jsonrpc": "2.0", "method": "notifications/initialized"})
    )
    .is_none());
    let list = mcp::handle(
        &mut ws,
        &json!({"jsonrpc": "2.0", "id": 2, "method": "tools/list"}),
    )
    .unwrap();
    let names: Vec<&str> = list["result"]["tools"]
        .as_array()
        .unwrap()
        .iter()
        .map(|t| t["name"].as_str().unwrap())
        .collect();
    for t in [
        "project_info",
        "list_prefabs",
        "add_object",
        "update_object",
        "render_view",
        "check_project",
        "build_html",
    ] {
        assert!(names.contains(&t), "{t}");
    }
    let (err, info) = call(&mut ws, 3, "project_info", json!({}));
    assert!(!err && info["objects"].as_u64().unwrap() > 10);
    let (err, pf) = call(&mut ws, 4, "list_prefabs", json!({"type": "building"}));
    assert!(
        !err && pf["props"]
            .as_array()
            .unwrap()
            .iter()
            .any(|p| p["key"] == "floors")
    );
    let (err, added) = call(
        &mut ws,
        5,
        "add_object",
        json!({"type": "building", "x": 20, "y": 15, "props": {"w": 8, "d": 6, "floors": 1}, "name": "Store"}),
    );
    assert!(!err, "{added}");
    let id = added["id"].as_str().unwrap().to_string();
    let b = added["object"]["box"].as_array().unwrap();
    assert_eq!(
        (b[0].as_f64().unwrap(), b[3].as_f64().unwrap()),
        (16.0, 24.0)
    );
    let (err, upd) = call(
        &mut ws,
        6,
        "update_object",
        json!({"id": id, "rot": 90, "props": {"roof": "gable"}}),
    );
    assert!(!err, "{upd}");
    assert_eq!(upd["object"]["rot"], 90.0);
    let (err, bad) = call(
        &mut ws,
        7,
        "update_object",
        json!({"id": id, "props": {"floors": 99}}),
    );
    assert!(err && bad.as_str().unwrap().contains("outside"), "{bad}");
    let (err, ops) = call(
        &mut ws,
        8,
        "apply_ops",
        json!({"ops": [
            {"op": "add", "type": "tree", "x": 0, "y": 18},
            {"op": "add", "type": "tree", "x": 4, "y": 18},
            {"op": "remove", "id": "tree-1"}
        ]}),
    );
    assert!(!err, "{ops}");
    let (err, view) = call(
        &mut ws,
        9,
        "render_view",
        json!({"level": "gf", "rotation": 2}),
    );
    assert!(!err && view["boxes"].get(&id).is_some(), "{view}");
    let (err, svg) = call(&mut ws, 10, "render_view", json!({"format": "svg"}));
    assert!(!err && svg.as_str().unwrap().starts_with("<svg"));
    let (err, chk) = call(&mut ws, 11, "check_project", json!({}));
    assert!(!err && chk["ok"] == true, "{chk}");
    let (err, built) = call(&mut ws, 12, "build_html", json!({}));
    assert!(!err && Path::new(built["path"].as_str().unwrap()).exists());
    let (err, _) = call(&mut ws, 13, "undo", json!({}));
    assert!(!err);
    assert!(
        ws.project.doc.get("tree-1").is_some(),
        "undo brings back the batch"
    );
    let unknown = mcp::handle(
        &mut ws,
        &json!({"jsonrpc": "2.0", "id": 14, "method": "nope"}),
    )
    .unwrap();
    assert_eq!(unknown["error"]["code"], -32601);
    let _ = std::fs::remove_dir_all(&dir);
}

#[test]
fn scaffolded_project_works() {
    let dir = std::env::temp_dir().join(format!("isokit-test-new-{}", std::process::id()));
    let _ = std::fs::remove_dir_all(&dir);
    isokit_project::scaffold(&dir, "New site").unwrap();
    let p = Project::load(&dir).unwrap();
    assert_eq!(p.meta().title, "New site");
    let f = check::check(&p);
    assert!(f.is_empty(), "{f:?}");
    assert!(isokit_project::scaffold(&dir, "again").is_err());
    let _ = std::fs::remove_dir_all(&dir);
}