mod subcommands;

use std::{
    path::PathBuf,
    sync::{Arc, Mutex},
};

use clap::Command;

use crate::{
    actions::CuddleAction,
    context::{CuddleContext, CuddleTreeType},
    model::*,
    util::git::GitCommit,
};

use self::subcommands::render_template::RenderTemplateCommand;

#[derive(Debug, Clone)]
pub struct CuddleCli<'a> {
    scripts: Vec<CuddleAction>,
    variables: Vec<CuddleVariable>,
    context: Arc<Mutex<Vec<CuddleContext>>>,
    command: Option<Command<'a>>,
    tmp_dir: Option<PathBuf>,
}

impl<'a> CuddleCli<'a> {
    pub fn new(context: Arc<Mutex<Vec<CuddleContext>>>) -> anyhow::Result<CuddleCli<'a>> {
        let mut cli = CuddleCli {
            scripts: vec![],
            variables: vec![],
            context: context.clone(),
            command: None,
            tmp_dir: None,
        };

        cli = cli
            .process_variables()
            .process_scripts()
            .process_templates()?
            .build_cli();

        Ok(cli)
    }

    fn process_variables(mut self) -> Self {
        if let Ok(context_iter) = self.context.clone().lock() {
            for ctx in context_iter.iter() {
                if let Some(variables) = ctx.plan.vars.clone() {
                    for (name, var) in variables {
                        self.variables.push(CuddleVariable::new(name, var))
                    }
                }

                if let CuddleTreeType::Root = ctx.node_type {
                    let mut temp_path = ctx.path.clone();
                    temp_path.push(".cuddle/tmp");

                    self.variables.push(CuddleVariable::new(
                        "tmp".into(),
                        temp_path.clone().to_string_lossy().to_string(),
                    ));

                    self.tmp_dir = Some(temp_path);
                }
            }
        }

        match GitCommit::new() {
            Ok(commit) => self.variables.push(CuddleVariable::new(
                "commit_sha".into(),
                commit.commit_sha.clone(),
            )),
            Err(e) => {
                log::debug!("{}", e);
            }
        }

        self
    }

    fn process_scripts(mut self) -> Self {
        if let Ok(context_iter) = self.context.clone().lock() {
            for ctx in context_iter.iter() {
                if let Some(scripts) = ctx.plan.scripts.clone() {
                    for (name, script) in scripts {
                        self.scripts
                            .push(CuddleAction::new(script.clone(), ctx.path.clone(), name))
                    }
                }
            }
        }

        self
    }

    fn process_templates(self) -> anyhow::Result<Self> {
        if let None = self.tmp_dir {
            log::debug!("cannot process template as bare bones cli");
            return Ok(self);
        }

        // Make sure tmp_dir exists and clean it up first
        let tmp_dir = self
            .tmp_dir
            .clone()
            .ok_or(anyhow::anyhow!("tmp_dir does not exist aborting"))?;
        if tmp_dir.exists() && tmp_dir.ends_with("tmp") {
            std::fs::remove_dir_all(tmp_dir.clone())?;
        }
        std::fs::create_dir_all(tmp_dir.clone())?;
        // Handle all templating with variables and such.
        // TODO: use actual templating engine, for new we just copy templates to the final folder

        if let Ok(context_iter) = self.context.clone().lock() {
            for ctx in context_iter.iter() {
                let mut template_path = ctx.path.clone();
                template_path.push("templates");

                log::trace!("template path: {}", template_path.clone().to_string_lossy());

                if !template_path.exists() {
                    continue;
                }

                for file in std::fs::read_dir(template_path)?.into_iter() {
                    let f = file?;
                    let mut dest_file = tmp_dir.clone();
                    dest_file.push(f.file_name());

                    std::fs::copy(f.path(), dest_file)?;
                }
            }
        }

        Ok(self)
    }

    fn build_cli(mut self) -> Self {
        let mut root_cmd = Command::new("cuddle")
            .version("1.0")
            .author("kjuulh <contact@kasperhermansen.com>")
            .about("cuddle is your domain specific organization tool. It enabled widespread sharing through repositories, as well as collaborating while maintaining speed and integrity")
            .subcommand_required(true)
            .arg_required_else_help(true)
            .propagate_version(true);

        root_cmd = subcommands::x::build_command(root_cmd, self.clone());
        root_cmd = subcommands::render_template::build_command(root_cmd);

        self.command = Some(root_cmd);

        self
    }

    pub fn execute(self) -> anyhow::Result<Self> {
        if let Some(mut cli) = self.command.clone() {
            let matches = cli.clone().get_matches();

            let res = match matches.subcommand() {
                Some(("x", exe_submatch)) => subcommands::x::execute_x(exe_submatch, self.clone()),
                Some(("render_template", sub_matches)) => {
                    RenderTemplateCommand::from_matches(sub_matches, self.clone())
                        .and_then(|cmd| cmd.execute())?;
                    Ok(())
                }
                _ => Err(anyhow::anyhow!("could not find a match")),
            };

            match res {
                Ok(()) => {}
                Err(e) => {
                    let _ = cli.print_long_help();
                    return Err(e);
                }
            }
        }

        Ok(self)
    }
}