use std::{net::SocketAddr, path::PathBuf};

use clap::{FromArgMatches, Parser, Subcommand, crate_authors, crate_description, crate_version};
use colored_json::ToColoredJson;
use kdl::KdlDocument;
use rusty_s3::{Bucket, Credentials, S3Action};

use crate::{
    model::{Context, Plan, Project},
    plan_reconciler::PlanReconciler,
    state::SharedState,
};

mod run;
mod template;

#[derive(Subcommand)]
enum Commands {
    Init {},
    Template(template::Template),
    Info {},
    Serve {
        #[arg(env = "FOREST_HOST", long, default_value = "127.0.0.1:3000")]
        host: SocketAddr,

        #[arg(env = "FOREST_S3_ENDPOINT", long = "s3-endpoint")]
        s3_endpoint: String,

        #[arg(env = "FOREST_S3_REGION", long = "s3-region")]
        s3_region: String,

        #[arg(env = "FOREST_S3_BUCKET", long = "s3-bucket")]
        s3_bucket: String,

        #[arg(env = "FOREST_S3_USER", long = "s3-user")]
        s3_user: String,

        #[arg(env = "FOREST_S3_PASSWORD", long = "s3-password")]
        s3_password: String,
    },
}

fn get_root(include_run: bool) -> clap::Command {
    let mut root_cmd = clap::Command::new("forest")
        .subcommand_required(true)
        .author(crate_authors!())
        .version(crate_version!())
        .about(crate_description!())
        .arg(
            clap::Arg::new("project_path")
                .long("project-path")
                .env("FOREST_PROJECT_PATH")
                .default_value("."),
        );

    if include_run {
        root_cmd = root_cmd
            .subcommand(clap::Command::new("run").allow_external_subcommands(true))
            .ignore_errors(true);
    }

    Commands::augment_subcommands(root_cmd)
}

pub async fn execute() -> anyhow::Result<()> {
    let matches = get_root(true).get_matches();
    let project_path = PathBuf::from(
        &matches
            .get_one::<String>("project_path")
            .expect("project path always to be set"),
    )
    .canonicalize()?;
    let project_file_path = project_path.join("forest.kdl");
    if !project_file_path.exists() {
        anyhow::bail!(
            "no 'forest.kdl' file was found at: {}",
            project_file_path.display().to_string()
        );
    }

    let project_file = tokio::fs::read_to_string(&project_file_path).await?;
    let project_doc: KdlDocument = project_file.parse()?;

    let project: Project = project_doc.try_into()?;
    tracing::trace!("found a project name: {}", project.name);

    let plan = if let Some(plan_file_path) = PlanReconciler::new()
        .reconcile(&project, &project_path)
        .await?
    {
        let plan_file = tokio::fs::read_to_string(&plan_file_path).await?;
        let plan_doc: KdlDocument = plan_file.parse()?;

        let plan: Plan = plan_doc.try_into()?;
        tracing::trace!("found a plan name: {}", project.name);

        Some(plan)
    } else {
        None
    };

    let context = Context { project, plan };

    let matches = if matches.subcommand_matches("run").is_some() {
        tracing::debug!("run is called, building extra commands, rerunning the parser");
        let root = get_root(false);

        let root = run::Run::augment_command(root, &context);

        root.get_matches()
    } else {
        matches
    };

    match matches.subcommand().unwrap() {
        ("run", args) => {
            run::Run::execute(args, &project_path, &context).await?;
        }
        _ => match Commands::from_arg_matches(&matches).unwrap() {
            Commands::Init {} => {
                tracing::info!("initializing project");
                tracing::trace!("found context: {:?}", context);
            }
            Commands::Info {} => {
                let output = serde_json::to_string_pretty(&context)?;
                println!("{}", output.to_colored_json_auto().unwrap_or(output));
            }
            Commands::Template(template) => {
                template.execute(&project_path, &context).await?;
            }
            Commands::Serve {
                s3_endpoint,
                s3_bucket,
                s3_region,
                s3_user,
                s3_password,
                ..
            } => {
                tracing::info!("Starting server");
                let creds = Credentials::new(s3_user, s3_password);
                let bucket = Bucket::new(
                    url::Url::parse(&s3_endpoint)?,
                    rusty_s3::UrlStyle::Path,
                    s3_bucket,
                    s3_region,
                )?;
                let put_object = bucket.put_object(Some(&creds), "some-object");
                let _url = put_object.sign(std::time::Duration::from_secs(30));
                let _state = SharedState::new().await?;
            }
        },
    }

    Ok(())
}