use is_terminal::IsTerminal;

use crate::errors::RailwayError;
use crate::util::prompt::{fake_select, prompt_select, prompt_text_with_placeholder_if_blank};
use crate::workspace::{Workspace, workspaces};

use super::*;

/// Create a new project
#[derive(Parser)]
#[clap(
    visible_alias = "new",
    after_help = "Examples:\n\n  railway init --name api --json\n  railway init --name api --workspace workspace-id --json\n\nAutomation notes:\n  This creates a project and links the current directory to the project's default environment.\n  Use an exact workspace ID or name when running outside a terminal."
)]
pub struct Args {
    /// Project name
    #[clap(short, long)]
    name: Option<String>,

    /// Workspace ID or name
    #[clap(short, long)]
    workspace: Option<String>,

    /// Output in JSON format
    #[clap(long)]
    json: bool,
}

pub async fn command(args: Args) -> Result<()> {
    let mut configs = Configs::new()?;

    let client = GQLClient::new_authorized(&configs)?;

    let workspaces = workspaces().await?;
    let workspace = prompt_workspace(workspaces, args.workspace)?;

    let project_name = prompt_project_name(args.name)?;

    let vars = mutations::project_create::Variables {
        // Railway's API will automatically generate a name if one is not provided
        name: if project_name.is_empty() {
            None
        } else {
            Some(project_name)
        },
        description: None,
        workspace_id: Some(workspace.id().to_owned()),
    };
    let project_create =
        post_graphql::<mutations::ProjectCreate, _>(&client, configs.get_backboard(), vars)
            .await?
            .project_create;

    let environment = project_create
        .environments
        .edges
        .first()
        .context("No environments")?
        .node
        .clone();

    configs.link_project(
        project_create.id.clone(),
        Some(project_create.name.clone()),
        environment.id.clone(),
        Some(environment.name.clone()),
    )?;
    configs.write()?;

    if args.json {
        println!(
            "{}",
            serde_json::json!({
                "id": project_create.id,
                "name": project_create.name
            })
        );
    } else {
        println!(
            "\n{} {} on {}",
            "Created project".green().bold(),
            project_create.name.bold(),
            workspace,
        );

        println!(
            "{}",
            format!(
                "https://{}/project/{}",
                configs.get_host(),
                project_create.id
            )
            .bold()
            .underline()
        );
    }
    Ok(())
}

fn prompt_workspace(workspaces: Vec<Workspace>, workspace: Option<String>) -> Result<Workspace> {
    let select = |w: &Workspace| {
        fake_select("Select a workspace", w.name());
        w.clone()
    };

    if let Some(input) = workspace {
        return workspaces
            .iter()
            .find(|w| w.id().eq_ignore_ascii_case(&input) || w.name().eq_ignore_ascii_case(&input))
            .map(select)
            .ok_or_else(|| RailwayError::WorkspaceNotFound(input).into());
    }

    if workspaces.len() == 1 {
        return Ok(select(&workspaces[0]));
    }

    if !std::io::stdout().is_terminal() {
        bail!("--workspace required in non-interactive mode (multiple workspaces available)");
    }

    let workspace = prompt_select("Select a workspace", workspaces)?;
    Ok(workspace)
}

fn prompt_project_name(name: Option<String>) -> Result<String> {
    if let Some(name) = name {
        fake_select("Project Name", &name);

        return Ok(name);
    }

    if !std::io::stdout().is_terminal() {
        return Ok(String::new());
    }

    let maybe_name = prompt_text_with_placeholder_if_blank(
        "Project Name",
        "<leave blank for randomly generated>",
        "<randomly generated>",
    )?;

    Ok(maybe_name.trim().to_string())
}
