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//! ref: composer/src/Composer/Command/GlobalCommand.php

use std::path::Path;

use anyhow::Result;
use shirabe_external_packages::composer::pcre::preg::Preg;
use shirabe_external_packages::symfony::component::console::command::command::Command;
use shirabe_external_packages::symfony::console::completion::completion_input::CompletionInput;
use shirabe_external_packages::symfony::console::completion::completion_suggestions::CompletionSuggestions;
use shirabe_external_packages::symfony::console::input::input_interface::InputInterface;
use shirabe_external_packages::symfony::console::input::string_input::StringInput;
use shirabe_external_packages::symfony::console::output::output_interface::OutputInterface;
use shirabe_php_shim::{LogicException, RuntimeException, chdir};

use crate::command::base_command::BaseCommand;
use crate::composer::Composer;
use crate::console::input::input_argument::InputArgument;
use crate::factory::Factory;
use crate::io::io_interface::IOInterface;
use crate::util::filesystem::Filesystem;
use crate::util::platform::Platform;

#[derive(Debug)]
pub struct GlobalCommand {
    inner: Command,
    composer: Option<Composer>,
    io: Option<Box<dyn IOInterface>>,
}

impl GlobalCommand {
    pub fn complete(&self, input: &CompletionInput, suggestions: &mut CompletionSuggestions) {
        let application = self.inner.get_application();
        if input.must_suggest_argument_values_for("command-name") {
            let names: Vec<String> = application
                .all()
                .into_iter()
                .filter(|cmd| !cmd.is_hidden())
                .filter_map(|cmd| cmd.get_name().map(|n| n.to_string()))
                .collect();
            suggestions.suggest_values(names);
            return;
        }

        let command_name = input
            .get_argument("command-name")
            .as_string()
            .unwrap_or("")
            .to_string();
        if application.has(&command_name) {
            let sub_input = self.prepare_subcommand_input(input.as_input_interface(), true);
            let sub_input = CompletionInput::from_string(&sub_input.to_string(), 2);
            let command = application.find(&command_name);
            command.merge_application_definition();
            sub_input.bind(command.get_definition());
            command.complete(&sub_input, suggestions);
        }
    }

    pub fn configure(&mut self) {
        self.inner
            .set_name("global")
            .set_description("Allows running commands in the global composer dir ($COMPOSER_HOME)")
            .set_definition(vec![
                InputArgument::new(
                    "command-name",
                    Some(InputArgument::REQUIRED),
                    "",
                    None,
                    vec![],
                ),
                InputArgument::new(
                    "args",
                    Some(InputArgument::IS_ARRAY | InputArgument::OPTIONAL),
                    "",
                    None,
                    vec![],
                ),
            ])
            .set_help(
                "Use this command as a wrapper to run other Composer commands\n\
                within the global context of COMPOSER_HOME.\n\n\
                You can use this to install CLI utilities globally, all you need\n\
                is to add the COMPOSER_HOME/vendor/bin dir to your PATH env var.\n\n\
                COMPOSER_HOME is c:\\Users\\<user>\\AppData\\Roaming\\Composer on Windows\n\
                and /home/<user>/.composer on unix systems.\n\n\
                If your system uses freedesktop.org standards, then it will first check\n\
                XDG_CONFIG_HOME or default to /home/<user>/.config/composer\n\n\
                Note: This path may vary depending on customizations to bin-dir in\n\
                composer.json or the environmental variable COMPOSER_BIN_DIR.\n\n\
                Read more at https://getcomposer.org/doc/03-cli.md#global",
            );
    }

    pub fn run(&self, input: &dyn InputInterface, output: &dyn OutputInterface) -> Result<i64> {
        let tokens = Preg::split(r"{\s+}", &input.to_string())?;
        let mut args: Vec<String> = vec![];
        for token in &tokens {
            if !token.is_empty() && !token.starts_with('-') {
                args.push(token.clone());
                if args.len() >= 2 {
                    break;
                }
            }
        }

        if args.len() < 2 {
            return self.inner.run(input, output);
        }

        let sub_input = self.prepare_subcommand_input(input, false)?;
        Ok(self.inner.get_application().run(&sub_input, output)?)
    }

    fn prepare_subcommand_input(
        &self,
        input: &dyn InputInterface,
        quiet: bool,
    ) -> Result<StringInput> {
        if Platform::get_env("COMPOSER").is_some() {
            Platform::clear_env("COMPOSER");
        }

        let config = Factory::create_config(None, None)?;
        let home = config.get("home").as_string().unwrap_or("").to_string();

        if !Path::new(&home).is_dir() {
            let fs = Filesystem::new();
            fs.ensure_directory_exists(&home)?;
            if !Path::new(&home).is_dir() {
                return Err(RuntimeException {
                    message: "Could not create home directory".to_string(),
                    code: 0,
                }
                .into());
            }
        }

        chdir(&home).map_err(|e| RuntimeException {
            message: format!("Could not switch to home directory \"{}\"", home),
            code: 0,
        })?;

        if !quiet {
            self.inner.get_io().write_error(&format!(
                "<info>Changed current directory to {}</info>",
                home
            ));
        }

        let new_input_str = Preg::replace(
            r"{\bg(?:l(?:o(?:b(?:a(?:l)?)?)?)?)?\b}",
            "",
            &input.to_string(),
            1,
        )?;
        self.inner.get_application().reset_composer();

        Ok(StringInput::new(new_input_str))
    }

    pub fn is_proxy_command(&self) -> bool {
        true
    }
}

impl BaseCommand for GlobalCommand {
    fn inner(&self) -> &Command {
        &self.inner
    }

    fn inner_mut(&mut self) -> &mut Command {
        &mut self.inner
    }

    fn composer(&self) -> Option<&Composer> {
        self.composer.as_ref()
    }

    fn composer_mut(&mut self) -> &mut Option<Composer> {
        &mut self.composer
    }

    fn io(&self) -> Option<&dyn IOInterface> {
        self.io.as_deref()
    }

    fn io_mut(&mut self) -> &mut Option<Box<dyn IOInterface>> {
        &mut self.io
    }
}