// Copyright 2019-2021 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT

use clap::{Parser, Subcommand};
use std::{
  env::set_var,
  thread::{sleep, spawn},
  time::Duration,
};
use sublime_fuzzy::best_match;
use tauri_mobile::{
  android::{
    adb,
    config::{Config as AndroidConfig, Metadata as AndroidMetadata, Raw as RawAndroidConfig},
    device::Device,
    emulator,
    env::Env,
    target::Target,
  },
  config::app::App,
  opts::NoiseLevel,
  os,
  util::prompt,
};

use super::{
  ensure_init, get_app,
  init::{command as init_command, init_dot_cargo},
  log_finished, read_options, CliOptions, Target as MobileTarget, MIN_DEVICE_MATCH_SCORE,
};
use crate::{
  helpers::config::{get as get_tauri_config, Config as TauriConfig},
  Result,
};

mod android_studio_script;
mod build;
mod dev;
mod open;
pub(crate) mod project;

#[derive(Parser)]
#[clap(
  author,
  version,
  about = "Android commands",
  subcommand_required(true),
  arg_required_else_help(true)
)]
pub struct Cli {
  #[clap(subcommand)]
  command: Commands,
}

#[derive(Debug, Parser)]
#[clap(about = "Initializes a Tauri Android project")]
pub struct InitOptions {
  /// Skip prompting for values
  #[clap(long)]
  ci: bool,
}

#[derive(Subcommand)]
enum Commands {
  Init(InitOptions),
  /// Open project in Android Studio
  Open,
  Dev(dev::Options),
  Build(build::Options),
  #[clap(hide(true))]
  AndroidStudioScript(android_studio_script::Options),
}

pub fn command(cli: Cli, verbosity: u8) -> Result<()> {
  let noise_level = NoiseLevel::from_occurrences(verbosity as u64);
  match cli.command {
    Commands::Init(options) => init_command(MobileTarget::Android, options.ci, false)?,
    Commands::Open => open::command()?,
    Commands::Dev(options) => dev::command(options, noise_level)?,
    Commands::Build(options) => build::command(options, noise_level)?,
    Commands::AndroidStudioScript(options) => android_studio_script::command(options)?,
  }

  Ok(())
}

pub fn get_config(
  app: Option<App>,
  config: &TauriConfig,
  cli_options: &CliOptions,
) -> (App, AndroidConfig, AndroidMetadata) {
  let app = app.unwrap_or_else(|| get_app(config));
  let android_options = cli_options.clone();

  let raw = RawAndroidConfig {
    features: android_options.features.clone(),
    logcat_filter_specs: vec!["RustStdoutStderr".into(), "*:E".into()],
    ..Default::default()
  };
  let config = AndroidConfig::from_raw(app.clone(), Some(raw)).unwrap();

  let metadata = AndroidMetadata {
    supported: true,
    cargo_args: Some(android_options.args),
    features: android_options.features,
    ..Default::default()
  };

  set_var("WRY_ANDROID_REVERSED_DOMAIN", app.reverse_domain());
  set_var("WRY_ANDROID_APP_NAME_SNAKE_CASE", app.name());
  set_var(
    "WRY_ANDROID_KOTLIN_FILES_OUT_DIR",
    config
      .project_dir()
      .join("app/src/main")
      .join(format!(
        "java/{}/{}",
        app.reverse_domain().replace('.', "/"),
        app.name()
      ))
      .join("generated"),
  );

  (app, config, metadata)
}

pub fn with_config<T>(
  cli_options: Option<CliOptions>,
  f: impl FnOnce(&App, &AndroidConfig, &AndroidMetadata, CliOptions) -> Result<T>,
) -> Result<T> {
  let (app, config, metadata, cli_options) = {
    let tauri_config = get_tauri_config(None)?;
    let tauri_config_guard = tauri_config.lock().unwrap();
    let tauri_config_ = tauri_config_guard.as_ref().unwrap();
    let cli_options = cli_options.unwrap_or_else(read_options);
    let (app, config, metadata) = get_config(None, tauri_config_, &cli_options);
    (app, config, metadata, cli_options)
  };
  f(&app, &config, &metadata, cli_options)
}

fn env() -> Result<Env> {
  let env = super::env()?;
  tauri_mobile::android::env::Env::from_env(env).map_err(Into::into)
}

fn delete_codegen_vars() {
  for (k, _) in std::env::vars() {
    if k.starts_with("WRY_") && (k.ends_with("CLASS_EXTENSION") || k.ends_with("CLASS_INIT")) {
      std::env::remove_var(k);
    }
  }
}

fn adb_device_prompt<'a>(env: &'_ Env, target: Option<&str>) -> Result<Device<'a>> {
  let device_list = adb::device_list(env)
    .map_err(|cause| anyhow::anyhow!("Failed to detect connected Android devices: {cause}"))?;
  if !device_list.is_empty() {
    let device = if let Some(t) = target {
      let (device, score) = device_list
        .into_iter()
        .rev()
        .map(|d| {
          let score = best_match(t, d.name()).map_or(0, |m| m.score());
          (d, score)
        })
        .max_by_key(|(_, score)| *score)
        // we already checked the list is not empty
        .unwrap();
      if score > MIN_DEVICE_MATCH_SCORE {
        device
      } else {
        anyhow::bail!("Could not find an Android device matching {t}")
      }
    } else if device_list.len() > 1 {
      let index = prompt::list(
        concat!("Detected ", "Android", " devices"),
        device_list.iter(),
        "device",
        None,
        "Device",
      )
      .map_err(|cause| anyhow::anyhow!("Failed to prompt for Android device: {cause}"))?;
      device_list.into_iter().nth(index).unwrap()
    } else {
      device_list.into_iter().next().unwrap()
    };
    println!(
      "Detected connected device: {} with target {:?}",
      device,
      device.target().triple,
    );
    Ok(device)
  } else {
    Err(anyhow::anyhow!("No connected Android devices detected"))
  }
}

fn emulator_prompt(env: &'_ Env, target: Option<&str>) -> Result<emulator::Emulator> {
  let emulator_list = emulator::avd_list(env).unwrap_or_default();
  if !emulator_list.is_empty() {
    let emulator = if let Some(t) = target {
      let (device, score) = emulator_list
        .into_iter()
        .rev()
        .map(|d| {
          let score = best_match(t, d.name()).map_or(0, |m| m.score());
          (d, score)
        })
        .max_by_key(|(_, score)| *score)
        // we already checked the list is not empty
        .unwrap();
      if score > MIN_DEVICE_MATCH_SCORE {
        device
      } else {
        anyhow::bail!("Could not find an Android Emulator matching {t}")
      }
    } else if emulator_list.len() > 1 {
      let index = prompt::list(
        concat!("Detected ", "Android", " emulators"),
        emulator_list.iter(),
        "emulator",
        None,
        "Emulator",
      )
      .map_err(|cause| anyhow::anyhow!("Failed to prompt for Android Emulator device: {cause}"))?;
      emulator_list.into_iter().nth(index).unwrap()
    } else {
      emulator_list.into_iter().next().unwrap()
    };

    Ok(emulator)
  } else {
    Err(anyhow::anyhow!("No available Android Emulator detected"))
  }
}

fn device_prompt<'a>(env: &'_ Env, target: Option<&str>) -> Result<Device<'a>> {
  if let Ok(device) = adb_device_prompt(env, target) {
    Ok(device)
  } else {
    let emulator = emulator_prompt(env, target)?;
    let handle = emulator.start(env)?;
    spawn(move || {
      let _ = handle.wait();
    });
    loop {
      sleep(Duration::from_secs(2));
      if let Ok(device) = adb_device_prompt(env, Some(emulator.name())) {
        return Ok(device);
      }
    }
  }
}

fn detect_target_ok<'a>(env: &Env) -> Option<&'a Target<'a>> {
  device_prompt(env, None).map(|device| device.target()).ok()
}

fn open_and_wait(config: &AndroidConfig, env: &Env) -> ! {
  log::info!("Opening Android Studio");
  if let Err(e) = os::open_file_with("Android Studio", config.project_dir(), &env.base) {
    log::error!("{}", e);
  }
  loop {
    sleep(Duration::from_secs(24 * 60 * 60));
  }
}