use std::error::Error;
use std::fs;
use comfy_table::modifiers::UTF8_ROUND_CORNERS;
use comfy_table::presets::UTF8_FULL;
use comfy_table::Table;
use serde::Deserialize;
use url::Url;
use crate::api::APIErrorResponse;
use crate::{NetworkCommands, TableStyle};

pub async fn network_main(command: NetworkCommands, server: Url) -> Result<(), Box<dyn Error>> {
    match command {
        NetworkCommands::List { table_style } => list_networks(server, table_style).await,
        NetworkCommands::Lookup {id} => get_network(id, server).await
    }
}

#[derive(Deserialize)]
pub struct NetworkListResp {
    pub data: Vec<Network>,
}

#[derive(Deserialize)]
pub struct Network {
    pub id: String,
    pub cidr: String,
    #[serde(rename = "organizationID")]
    pub organization_id: String,
    #[serde(rename = "signingCAID")]
    pub signing_ca_id: String,
    #[serde(rename = "createdAt")]
    pub created_at: String,
    #[serde(rename = "lighthousesAsRelays")]
    pub lighthouses_as_relays: bool,
    pub name: String,
}

pub async fn list_networks(server: Url, table_style: TableStyle) -> Result<(), Box<dyn Error>> {
    let client = reqwest::Client::new();

    // load session token
    let sess_token_store = dirs::config_dir().unwrap().join("tfcli-session.token");
    let session_token = fs::read_to_string(&sess_token_store)?;
    let auth_token_store = dirs::config_dir().unwrap().join("tfcli-auth.token");
    let auth_token = fs::read_to_string(&auth_token_store)?;

    let token = format!("{} {}", session_token, auth_token);

    let res = client
        .get(server.join("/v1/networks")?)
        .bearer_auth(token)
        .send()
        .await?;

    if res.status().is_success() {
        let resp: NetworkListResp = res.json().await?;

        if resp.data.is_empty() {
            println!("No networks found");
            return Ok(());
        }

        if matches!(table_style, TableStyle::List) {
            for network in &resp.data {
                println!("         Network: {}", network.id);
                println!("            CIDR: {}", network.cidr);
                println!("    Organization: {}", network.organization_id);
                println!("      Signing CA: {}", network.signing_ca_id);
                println!("Dedicated Relays: {}", !network.lighthouses_as_relays);
                println!("            Name: {}", network.name);
                println!("      Created At: {}", network.created_at);
                println!();
            }
            return Ok(());
        }

        let mut table = Table::new();
        match table_style {
            TableStyle::List => unreachable!(),
            TableStyle::Basic => (),
            TableStyle::Pretty => { table.load_preset(UTF8_FULL).apply_modifier(UTF8_ROUND_CORNERS) ; },
        };

        table.set_header(vec!["ID", "Name", "CIDR", "Organization ID", "Signing CA ID", "Dedicated Relays", "Created At"]);

        for network in &resp.data {
            table.add_row(vec![&network.id, &network.name, &network.cidr, &network.organization_id, &network.signing_ca_id, (!network.lighthouses_as_relays).to_string().as_str(), &network.created_at]);
        }

        println!("{table}");
    } else {
        let resp: APIErrorResponse = res.json().await?;

        eprintln!(
            "[error] Error listing networks: {} {}",
            resp.errors[0].code, resp.errors[0].message
        );

        std::process::exit(1);
    }

    Ok(())
}

#[derive(Deserialize)]
pub struct NetworkGetResponse {
    pub data: Network,
}

pub async fn get_network(id: String, server: Url) -> Result<(), Box<dyn Error>> {
    let client = reqwest::Client::new();

    // load session token
    let sess_token_store = dirs::config_dir().unwrap().join("tfcli-session.token");
    let session_token = fs::read_to_string(&sess_token_store)?;
    let auth_token_store = dirs::config_dir().unwrap().join("tfcli-auth.token");
    let auth_token = fs::read_to_string(&auth_token_store)?;

    let token = format!("{} {}", session_token, auth_token);

    let res = client
        .get(server.join(&format!("/v1/networks/{}", id))?)
        .bearer_auth(token)
        .send()
        .await?;

    if res.status().is_success() {
        let network: Network = res.json::<NetworkGetResponse>().await?.data;

        println!("         Network: {}", network.id);
        println!("            CIDR: {}", network.cidr);
        println!("    Organization: {}", network.organization_id);
        println!("      Signing CA: {}", network.signing_ca_id);
        println!("Dedicated Relays: {}", !network.lighthouses_as_relays);
        println!("            Name: {}", network.name);
        println!("      Created At: {}", network.created_at);
    } else {
        let resp: APIErrorResponse = res.json().await?;

        eprintln!(
            "[error] Error listing networks: {} {}",
            resp.errors[0].code, resp.errors[0].message
        );

        std::process::exit(1);
    }

    Ok(())
}