lingxia-devtool 0.6.0

use lingxia_devtool_protocol::handlers;
use serde::Deserialize;
use serde_json::{Value, json};
use std::time::Duration;

const DEFAULT_EVAL_TIMEOUT: Duration = Duration::from_secs(5);
const DEFAULT_QUERY_TEXT_LIMIT: usize = 4096;

pub(crate) fn handle_lxapp_page_command(
    handler: &str,
    args: Option<Value>,
) -> Option<Result<Option<Value>, String>> {
    if !handler.starts_with("lxapp.page.") {
        return None;
    }

    Some(handle_lxapp_page_command_impl(handler, args))
}

fn handle_lxapp_page_command_impl(
    handler: &str,
    args: Option<Value>,
) -> Result<Option<Value>, String> {
    match handler {
        handlers::lxapp_page::CURRENT => {
            let args: PageTargetArgs = parse_args(handler, args)?;
            let info = lingxia::dev::lxapp_dev_page_current(args.appid.as_deref())?;
            serde_json::to_value(info)
                .map(Some)
                .map_err(|err| err.to_string())
        }
        handlers::lxapp_page::LIST => {
            let args: AppArgs = parse_args(handler, args)?;
            let pages = lingxia::dev::lxapp_dev_page_list(args.appid.as_deref())?;
            let appid = pages
                .first()
                .map(|page| page.appid.clone())
                .unwrap_or_default();
            Ok(Some(json!({
                "appid": appid,
                "pages_count": pages.len(),
                "pages": pages,
            })))
        }
        handlers::lxapp_page::INFO => {
            let args: PageTargetArgs = parse_args(handler, args)?;
            let info =
                lingxia::dev::lxapp_dev_page_info(args.appid.as_deref(), args.page.as_deref())?;
            serde_json::to_value(info)
                .map(Some)
                .map_err(|err| err.to_string())
        }
        handlers::lxapp_page::EVAL => {
            let args: EvalArgs = parse_args(handler, args)?;
            let timeout = Duration::from_millis(args.timeout_ms.unwrap_or_else(|| {
                u64::try_from(DEFAULT_EVAL_TIMEOUT.as_millis()).unwrap_or(5000)
            }));
            let value = run_async(async move {
                tokio::time::timeout(
                    timeout,
                    lingxia::dev::lxapp_dev_page_eval(
                        args.appid.as_deref(),
                        args.page.as_deref(),
                        &args.js,
                    ),
                )
                .await
                .map_err(|_| format!("lxapp page eval timed out after {}ms", timeout.as_millis()))?
            })?;
            Ok(Some(json!({ "value": value })))
        }
        handlers::lxapp_page::QUERY => {
            let args: QueryArgs = parse_args(handler, args)?;
            let max_text = args
                .max_text
                .or_else(|| (!args.full).then_some(DEFAULT_QUERY_TEXT_LIMIT));
            run_async(lingxia::dev::lxapp_dev_page_query(
                args.appid.as_deref(),
                args.page.as_deref(),
                &args.selector,
                args.index,
                args.all,
                max_text,
            ))
            .map(Some)
        }
        handlers::lxapp_page::CLICK => {
            let args: SelectorActionArgs = parse_args(handler, args)?;
            run_async(lingxia::dev::lxapp_dev_page_click(
                args.appid.as_deref(),
                args.page.as_deref(),
                &args.selector,
                args.index,
            ))?;
            Ok(None)
        }
        handlers::lxapp_page::TYPE => {
            let args: TextActionArgs = parse_args(handler, args)?;
            run_async(lingxia::dev::lxapp_dev_page_type(
                args.appid.as_deref(),
                args.page.as_deref(),
                &args.selector,
                args.index,
                &args.text,
            ))?;
            Ok(None)
        }
        handlers::lxapp_page::FILL => {
            let args: TextActionArgs = parse_args(handler, args)?;
            run_async(lingxia::dev::lxapp_dev_page_fill(
                args.appid.as_deref(),
                args.page.as_deref(),
                &args.selector,
                args.index,
                &args.text,
            ))?;
            Ok(None)
        }
        handlers::lxapp_page::PRESS => {
            let args: PressArgs = parse_args(handler, args)?;
            run_async(lingxia::dev::lxapp_dev_page_press(
                args.appid.as_deref(),
                args.page.as_deref(),
                &args.key,
            ))?;
            Ok(None)
        }
        handlers::lxapp_page::BACK => {
            let args: BackArgs = parse_args(handler, args)?;
            lingxia::dev::lxapp_dev_page_back(args.appid.as_deref(), args.delta.unwrap_or(1))?;
            Ok(None)
        }
        _ => Err(format!("unknown lxapp page handler: {}", handler)),
    }
}

fn parse_args<T>(handler: &str, args: Option<Value>) -> Result<T, String>
where
    T: for<'de> Deserialize<'de>,
{
    serde_json::from_value(args.unwrap_or_else(|| json!({})))
        .map_err(|err| format!("invalid args for {}: {}", handler, err))
}

fn run_async<T, E>(future: impl std::future::Future<Output = Result<T, E>>) -> Result<T, String>
where
    E: std::fmt::Display,
{
    tokio::runtime::Builder::new_current_thread()
        .enable_all()
        .build()
        .map_err(|err| err.to_string())?
        .block_on(future)
        .map_err(|err| err.to_string())
}

#[derive(Deserialize, Default)]
struct AppArgs {
    #[serde(default)]
    appid: Option<String>,
}

#[derive(Deserialize, Default)]
struct PageTargetArgs {
    #[serde(default)]
    appid: Option<String>,
    #[serde(default)]
    page: Option<String>,
}

#[derive(Deserialize)]
struct EvalArgs {
    #[serde(default)]
    appid: Option<String>,
    #[serde(default)]
    page: Option<String>,
    js: String,
    #[serde(default)]
    timeout_ms: Option<u64>,
}

#[derive(Deserialize)]
struct QueryArgs {
    #[serde(default)]
    appid: Option<String>,
    #[serde(default)]
    page: Option<String>,
    selector: String,
    #[serde(default)]
    index: Option<usize>,
    #[serde(default)]
    all: bool,
    #[serde(default)]
    full: bool,
    #[serde(default)]
    max_text: Option<usize>,
}

#[derive(Deserialize)]
struct SelectorActionArgs {
    #[serde(default)]
    appid: Option<String>,
    #[serde(default)]
    page: Option<String>,
    selector: String,
    #[serde(default)]
    index: Option<usize>,
}

#[derive(Deserialize)]
struct TextActionArgs {
    #[serde(default)]
    appid: Option<String>,
    #[serde(default)]
    page: Option<String>,
    selector: String,
    text: String,
    #[serde(default)]
    index: Option<usize>,
}

#[derive(Deserialize)]
struct PressArgs {
    #[serde(default)]
    appid: Option<String>,
    #[serde(default)]
    page: Option<String>,
    key: String,
}

#[derive(Deserialize)]
struct BackArgs {
    #[serde(default)]
    appid: Option<String>,
    #[serde(default)]
    delta: Option<u32>,
}