use super::{BuildContext, SharedBuildCommand};
use crate::{error::*, types::CrossbowMetadata};
use android_manifest::AndroidManifest;
use android_tools::java_tools::{JarSigner, Key};
use clap::Parser;
use crossbundle_tools::{
    commands::{android::*, combine_folders},
    error::CommandExt,
    types::*,
};
use std::path::{Path, PathBuf};

/// Specifies flags and options needed to build application
#[derive(Parser, Clone, Debug, Default)]
pub struct AndroidBuildCommand {
    #[clap(flatten)]
    pub shared: SharedBuildCommand,
    /// Build for the given android architecture.
    /// Supported targets are: `armv7-linux-androideabi`, `aarch64-linux-android`,
    /// `i686-linux-android`, `x86_64-linux-android`
    #[clap(long, short, multiple_values = true)]
    pub target: Vec<AndroidTarget>,
    /// Build strategy specifies what and how to build Android application: with help of
    /// Gradle, or with our native approach.
    #[clap(long, short, default_value = "gradle-apk")]
    pub strategy: AndroidStrategy,
    /// Only compile rust code as a dynamic library. By default: "crossbow-android"
    #[clap(long, default_missing_value = "crossbow_android")]
    pub lib: Option<String>,
    /// Path to export Gradle project. By default exports to `target/android/` folder.
    #[clap(long)]
    pub export_path: Option<PathBuf>,
    /// Path to the signing key.
    #[clap(long, requires_all = &["sign-key-pass", "sign-key-alias"])]
    pub sign_key_path: Option<PathBuf>,
    /// Signing key password.
    #[clap(long)]
    pub sign_key_pass: Option<String>,
    /// Signing key alias.
    #[clap(long)]
    pub sign_key_alias: Option<String>,
}

impl AndroidBuildCommand {
    // Checks options was specified in AndroidBuildCommand and then builds application.
    pub fn run(&self, config: &Config) -> Result<()> {
        if self.sign_key_path.is_some() && self.sign_key_pass.is_none() {
            config
                .shell()
                .warn("You provided a signing key but not password - set password please by providing `sign_key_pass` flag")?;
        }
        let context = BuildContext::new(config, self.shared.target_dir.clone())?;
        if let Some(name) = &self.lib {
            self.build_rust_lib(config, &context, name, None)?;
            return Ok(());
        }
        match &self.strategy {
            AndroidStrategy::NativeApk => {
                self.execute_apk(config, &context)?;
            }
            AndroidStrategy::NativeAab => {
                self.execute_aab(config, &context)?;
            }
            AndroidStrategy::GradleApk => {
                let (_, _, gradle_project_path) =
                    self.build_gradle(config, &context, &self.export_path)?;
                config.status("Building Gradle project")?;
                let mut gradle = gradle_init()?;
                gradle
                    .arg("build")
                    .arg("-p")
                    .arg(dunce::simplified(&gradle_project_path));
                gradle.output_err(true)?;
            }
        }
        Ok(())
    }

    /// Compile rust code as a dynamic library, generate Gradle project.
    pub fn build_gradle(
        &self,
        config: &Config,
        context: &BuildContext,
        export_path: &Option<PathBuf>,
    ) -> Result<(AndroidManifest, AndroidSdk, PathBuf)> {
        let sdk = AndroidSdk::from_env()?;
        let example = self.shared.example.as_ref();
        let (_, target_dir, package_name) = Self::needed_project_dirs(example, context)?;

        config.status_message("Starting gradle build process", &package_name)?;
        let android_build_dir = if let Some(export_path) = export_path {
            std::fs::create_dir_all(export_path)?;
            dunce::canonicalize(export_path)?
        } else {
            target_dir.join("android").join(&package_name)
        };

        // Set ANDROID_SDK_ROOT if there's no one
        if std::env::var("ANDROID_SDK_ROOT").is_err() {
            std::env::set_var("ANDROID_SDK_ROOT", sdk.sdk_path());
        }

        config.status("Preparing resources and assets")?;
        let (assets, resources) =
            Self::prepare_assets_and_resources(&context.config, &android_build_dir)?;
        config.status_message("Reading", "AndroidManifest.xml")?;
        let manifest = Self::get_android_manifest(context, AndroidStrategy::GradleApk)?;

        config.status("Generating gradle project")?;
        let gradle_project_path = gen_gradle_project(
            &manifest.package,
            manifest.version_code.unwrap_or(1),
            &manifest
                .version_name
                .clone()
                .unwrap_or_else(|| "0.1".to_owned()),
            &android_build_dir,
            &assets,
            &resources,
            &context.config.android.plugins,
        )?;

        config.status_message("Generating", "AndroidManifest.xml")?;
        save_android_manifest(&gradle_project_path, &manifest)?;

        let lib_name = "crossbow_android";
        self.build_rust_lib(config, context, lib_name, Some(android_build_dir))?;

        config.status_message(
            "Gradle project generated",
            gradle_project_path.to_str().unwrap(),
        )?;
        Ok((manifest, sdk, gradle_project_path))
    }

    /// Compile rust code as a dynamic library.
    pub fn build_rust_lib(
        &self,
        config: &Config,
        context: &BuildContext,
        lib_name: &str,
        export_path: Option<PathBuf>,
    ) -> Result<()> {
        let profile = self.shared.profile();
        let example = self.shared.example.as_ref();
        let (project_path, target_dir, package_name) = Self::needed_project_dirs(example, context)?;
        config.status_message("Starting lib build process", &package_name)?;
        let (sdk, ndk) = Self::android_toolchain()?;

        let android_build_dir = if let Some(export_path) = export_path {
            export_path
        } else {
            target_dir.join("android").join(&package_name)
        };

        config.status_message("Reading", "AndroidManifest.xml")?;
        let manifest = Self::get_android_manifest(context, AndroidStrategy::NativeApk)?;

        config.status_message("Compiling", "lib")?;
        let target_sdk_version = Self::target_sdk_version(&manifest, &sdk);
        let build_targets = Self::android_build_targets(context, profile, &self.target);
        let compiled_libs = self.build_target(
            context,
            build_targets,
            lib_name,
            &ndk,
            &project_path,
            profile,
            target_sdk_version,
            &target_dir,
            config,
        )?;

        for (compiled_lib, build_target) in compiled_libs {
            config.status_message(
                "Moving library to target/android/ directory",
                compiled_lib.file_name().unwrap().to_str().unwrap(),
            )?;
            let abi = build_target.android_abi();
            let out_dir = android_build_dir.join("libs").join(profile).join(abi);
            if !out_dir.exists() {
                std::fs::create_dir_all(&out_dir)?;
            }
            let file_name = compiled_lib.file_name().unwrap().to_owned();
            std::fs::copy(compiled_lib, &out_dir.join(&file_name))?;
        }
        Ok(())
    }

    /// Builds APK with aapt tool and signs it with apksigner.
    pub fn execute_apk(
        &self,
        config: &Config,
        context: &BuildContext,
    ) -> Result<(AndroidManifest, AndroidSdk, PathBuf)> {
        let profile = self.shared.profile();
        let example = self.shared.example.as_ref();
        let (project_path, target_dir, package_name) = Self::needed_project_dirs(example, context)?;
        config.status_message("Starting apk build process", &package_name)?;
        let (sdk, ndk) = Self::android_toolchain()?;

        let android_build_dir = target_dir.join("android").join(&package_name);
        let native_build_dir = android_build_dir.join("native").join("apk");
        let outputs_build_dir = android_build_dir.join("outputs");
        if !outputs_build_dir.exists() {
            std::fs::create_dir_all(&outputs_build_dir)?;
        }

        config.status_message("Reading", "AndroidManifest.xml")?;
        let manifest = Self::get_android_manifest(context, AndroidStrategy::NativeApk)?;
        config.status_message("Generating", "AndroidManifest.xml")?;
        let manifest_path = save_android_manifest(&native_build_dir, &manifest)?;
        config.status("Preparing resources and assets")?;
        let (assets, resources) =
            Self::prepare_assets_and_resources(&context.config, &android_build_dir)?;

        config.status_message("Compiling", "lib")?;
        let target_sdk_version = Self::target_sdk_version(&manifest, &sdk);
        let build_targets = Self::android_build_targets(context, profile, &self.target);
        let compiled_libs = self.build_target(
            context,
            build_targets,
            &package_name,
            &ndk,
            &project_path,
            profile,
            target_sdk_version,
            &target_dir,
            config,
        )?;

        config.status_message("Generating", "unaligned APK file")?;
        let unaligned_apk_path = gen_unaligned_apk(
            &sdk,
            &project_path,
            &native_build_dir,
            &manifest_path,
            &assets,
            &resources,
            &package_name,
            target_sdk_version,
        )?;

        config.status("Adding libs into APK file")?;
        for (compiled_lib, build_target) in compiled_libs {
            add_libs_into_apk(
                &sdk,
                &ndk,
                &unaligned_apk_path,
                &compiled_lib,
                build_target,
                profile,
                Self::min_sdk_version(&manifest),
                &android_build_dir,
                &target_dir,
            )?;
        }

        config.status("Aligning APK file")?;
        let aligned_apk_path =
            align_apk(&sdk, &unaligned_apk_path, &package_name, &outputs_build_dir)?;

        config.status_message("Generating", "debug signing key")?;
        let key = Self::find_keystore(
            self.sign_key_path.clone(),
            self.sign_key_pass.clone(),
            self.sign_key_alias.clone(),
        )?;

        config.status("Signing APK file")?;
        sign_apk(&sdk, &aligned_apk_path, key)?;
        config.status("Build finished successfully")?;
        Ok((manifest, sdk, aligned_apk_path))
    }

    /// Builds AAB with aapt2 tool and signs it with jarsigner.
    pub fn execute_aab(
        &self,
        config: &Config,
        context: &BuildContext,
    ) -> Result<(AndroidManifest, AndroidSdk, PathBuf, String, Key)> {
        let profile = self.shared.profile();
        let example = self.shared.example.as_ref();
        let (project_path, target_dir, package_name) = Self::needed_project_dirs(example, context)?;
        config.status_message("Starting aab build process", &package_name)?;
        let (sdk, ndk) = Self::android_toolchain()?;

        let android_build_dir = target_dir.join("android").join(&package_name);
        let native_build_dir = android_build_dir.join("native").join("aab");
        let outputs_build_dir = android_build_dir.join("outputs");
        if !outputs_build_dir.exists() {
            std::fs::create_dir_all(&outputs_build_dir)?;
        }

        config.status_message("Reading", "AndroidManifest.xml")?;
        let manifest = Self::get_android_manifest(context, AndroidStrategy::NativeAab)?;
        config.status_message("Generating", "AndroidManifest.xml")?;
        let manifest_path = save_android_manifest(&native_build_dir, &manifest)?;
        config.status("Preparing resources and assets")?;
        let (assets, resources) =
            Self::prepare_assets_and_resources(&context.config, &android_build_dir)?;

        config.status_message("Compiling", "lib")?;
        let target_sdk_version = Self::target_sdk_version(&manifest, &sdk);
        let build_targets = Self::android_build_targets(context, profile, &self.target);
        let compiled_libs = self.build_target(
            context,
            build_targets,
            &package_name,
            &ndk,
            &project_path,
            profile,
            target_sdk_version,
            &target_dir,
            config,
        )?;

        config.status_message("Generating", "proto format APK file")?;

        let compiled_res = if let Some(res) = &resources {
            let compiled_res_path = native_build_dir.join("compiled_res");
            if !compiled_res_path.exists() {
                std::fs::create_dir_all(&compiled_res_path)?;
            }
            let aapt2_compile = sdk.aapt2()?.compile_incremental(
                dunce::simplified(res),
                dunce::simplified(&compiled_res_path),
            );
            let compiled_res = aapt2_compile.run()?;
            Some(compiled_res)
        } else {
            None
        };

        let apk_path = native_build_dir.join(format!("{}_module.apk", package_name));
        let mut aapt2_link =
            sdk.aapt2()?
                .link_compiled_res(compiled_res, &apk_path, &manifest_path);
        if let Some(assets) = &assets {
            aapt2_link.assets(assets.clone())
        } else {
            &mut aapt2_link
        }
        .android_jar(sdk.android_jar(target_sdk_version)?)
        .proto_format(true)
        .auto_add_overlay(true)
        .run()?;

        config.status("Extracting apk files")?;
        let output_dir = native_build_dir.join("extracted_apk_files");
        let extracted_apk_path = extract_archive(&apk_path, &output_dir)?;

        config.status("Adding libs")?;
        for (compiled_lib, build_target) in compiled_libs {
            add_libs_into_aapt2(
                &ndk,
                &compiled_lib,
                build_target,
                profile,
                Self::min_sdk_version(&manifest),
                &extracted_apk_path,
                &target_dir,
                &package_name,
            )?;
        }

        config.status("Generating ZIP module from extracted files")?;
        let gen_zip_modules =
            gen_zip_modules(&native_build_dir, &package_name, &extracted_apk_path)?;

        for entry in std::fs::read_dir(&native_build_dir)? {
            let entry = entry?;
            let path = entry.path();
            if path.ends_with(format!("{}_unsigned.aab", package_name)) {
                std::fs::remove_file(&path)?;
            }
        }

        config.status("Generating aab from modules")?;
        let aab_path = gen_aab_from_modules(&package_name, &[gen_zip_modules], &outputs_build_dir)?;

        config.status_message("Generating", "debug signing key")?;
        let key = Self::find_keystore(
            self.sign_key_path.clone(),
            self.sign_key_pass.clone(),
            self.sign_key_alias.clone(),
        )?;

        config.status_message("Signing", "debug signing key")?;
        JarSigner::new(&aab_path, &key.key_alias)
            .keystore(&key.key_path)
            .storepass(key.key_pass.to_string())
            .verbose(true)
            .sigalg("SHA256withRSA".to_string())
            .digestalg("SHA-256".to_string())
            .run()?;

        let signed_aab = android_build_dir.join(format!("{}_signed.aab", package_name));
        std::fs::rename(&aab_path, &signed_aab)?;
        let output_aab = signed_aab.file_name().unwrap().to_str().unwrap();
        let aab_output_path = outputs_build_dir.join(output_aab);
        let mut options = fs_extra::file::CopyOptions::new();
        options.overwrite = true;
        fs_extra::file::move_file(&signed_aab, &outputs_build_dir.join(output_aab), &options)?;
        config.status("Build finished successfully")?;
        Ok((manifest, sdk, aab_output_path, package_name, key))
    }

    /// Specifies project path and target directory needed to build application.
    pub fn needed_project_dirs(
        example: Option<&String>,
        context: &BuildContext,
    ) -> Result<(PathBuf, PathBuf, String)> {
        let project_path: PathBuf = context.project_path.clone();
        let target_dir: PathBuf = context.target_dir.clone();
        let (_target, package_name) = if let Some(example) = example {
            (Target::Example(example.clone()), example.clone())
        } else {
            (Target::Lib, context.package_name())
        };
        Ok((project_path, target_dir, package_name))
    }

    /// Specifies path to Android SDK and Android NDK.
    pub fn android_toolchain() -> Result<(AndroidSdk, AndroidNdk)> {
        let sdk = AndroidSdk::from_env()?;
        let ndk = AndroidNdk::from_env(sdk.sdk_path())?;
        Ok((sdk, ndk))
    }

    /// Find keystore for signing application or create it.
    pub fn find_keystore(
        sign_key_path: Option<PathBuf>,
        sign_key_pass: Option<String>,
        sign_key_alias: Option<String>,
    ) -> Result<Key> {
        let key = if let Some(key_path) = sign_key_path {
            let aab_key = Key {
                key_path,
                key_pass: sign_key_pass.unwrap(),
                key_alias: sign_key_alias.unwrap(),
            };
            if aab_key.key_path.exists() {
                aab_key
            } else {
                gen_key(
                    Some(aab_key.key_path),
                    Some(aab_key.key_pass),
                    Some(aab_key.key_alias),
                )?
            }
        } else {
            let aab_key = Key::new_default()?;
            if aab_key.key_path.exists() {
                aab_key
            } else {
                gen_key(
                    Some(aab_key.key_path),
                    Some(aab_key.key_pass),
                    Some(aab_key.key_alias),
                )?
            }
        };
        Ok(key)
    }

    /// Compiling libs for architecture and write out it in vector.
    pub fn build_target(
        &self,
        context: &BuildContext,
        build_targets: Vec<AndroidTarget>,
        package_name: &str,
        ndk: &AndroidNdk,
        project_path: &Path,
        profile: Profile,
        target_sdk_version: u32,
        target_dir: &Path,
        config: &Config,
    ) -> Result<Vec<(PathBuf, AndroidTarget)>> {
        let mut libs = Vec::new();
        for build_target in build_targets {
            let lib_name = format!("lib{}.so", package_name.replace('-', "_"));
            let rust_triple = build_target.rust_triple();

            config.status_message("Compiling for architecture", rust_triple)?;
            // Compile rust code for android depending on application wrapper
            rust_compile(
                ndk,
                build_target,
                project_path,
                profile,
                self.shared.features.clone(),
                self.shared.all_features,
                self.shared.no_default_features,
                target_sdk_version,
                &lib_name,
                context.config.android.app_wrapper,
            )?;

            let out_dir = target_dir.join(build_target.rust_triple()).join(&profile);
            let compiled_lib = out_dir.join(lib_name);
            libs.push((compiled_lib, build_target));
        }
        Ok(libs)
    }

    /// Get target sdk version from cargo manifest
    pub fn target_sdk_version(android_manifest: &AndroidManifest, sdk: &AndroidSdk) -> u32 {
        if let Some(target_sdk_version) = android_manifest
            .uses_sdk
            .as_ref()
            .and_then(|u| u.target_sdk_version)
        {
            return target_sdk_version;
        };
        sdk.default_platform()
    }

    /// Get min sdk version from cargo manifest
    pub fn min_sdk_version(android_manifest: &AndroidManifest) -> u32 {
        android_manifest
            .uses_sdk
            .as_ref()
            .and_then(|uses_sdk| uses_sdk.min_sdk_version)
            .unwrap()
    }

    /// Get android build targets from cargo manifest
    pub fn android_build_targets(
        context: &BuildContext,
        profile: Profile,
        build_targets: &Vec<AndroidTarget>,
    ) -> Vec<AndroidTarget> {
        if !build_targets.is_empty() {
            return build_targets.clone();
        };
        if profile == Profile::Debug && !context.config.android.debug_build_targets.is_empty() {
            return context.config.android.debug_build_targets.clone();
        };
        if profile == Profile::Release && !context.config.android.release_build_targets.is_empty() {
            return context.config.android.release_build_targets.clone();
        };
        vec![AndroidTarget::Aarch64]
    }

    /// Get android manifest from the path in cargo manifest or generate it with the given
    /// configuration
    pub fn get_android_manifest(
        context: &BuildContext,
        strategy: AndroidStrategy,
    ) -> Result<AndroidManifest> {
        if let Some(manifest_path) = &context.config.android.manifest_path {
            return Ok(read_android_manifest(manifest_path)?);
        }
        let mut manifest = if let Some(manifest) = &context.config.android.manifest {
            manifest.clone()
        } else {
            AndroidManifest::default()
        };
        update_android_manifest_with_default(
            &mut manifest,
            context.config.app_name.clone(),
            context.package_name().as_str(),
            strategy,
        );
        context.config.permissions.iter().for_each(|permission| {
            permission.update_manifest(&mut manifest);
        });
        if context.config.icon.is_some() {
            manifest.application.icon = Some(android_manifest::MipmapOrDrawableResource::mipmap(
                "ic_launcher",
                None,
            ));
        }
        Ok(manifest)
    }

    /// Prepare assets and resources for the application.
    ///
    /// Also, this function will generate mipmap icon resources if specified in the
    /// CrossbowMetadata config.
    pub fn prepare_assets_and_resources(
        config: &CrossbowMetadata,
        out_dir: &Path,
    ) -> Result<(Option<PathBuf>, Option<PathBuf>)> {
        let res = config.get_android_resources();
        let gen_resources = if res.is_empty() && config.icon.is_none() {
            None
        } else {
            let path = out_dir.join("gen_resources");
            std::fs::remove_dir_all(&path).ok();
            combine_folders(res, &path)?;

            if let Some(icon) = &config.icon {
                ImageGeneration {
                    icon_path: icon.to_owned(),
                    out_icon_name: "ic_launcher.png".to_owned(),
                    output_path: path.clone(),
                    force: true,
                }
                .gen_mipmap_res_from_icon()?;
            }
            Some(path)
        };

        let assets = config.get_android_assets();
        let gen_assets = if !res.is_empty() {
            let path = out_dir.join("gen_assets");
            std::fs::remove_dir_all(&path).ok();
            combine_folders(assets, &path)?;
            Some(path)
        } else {
            None
        };
        Ok((gen_assets, gen_resources))
    }
}