use anyhow::bail;
use clap::Arg;
use clap::ArgAction::SetTrue;
use clap::ArgMatches;
use reqwest::{StatusCode, Url};
use spacetimedb_lib::name::PublishOp;
use spacetimedb_lib::name::{is_address, parse_domain_name, PublishResult};
use std::fs;
use std::path::PathBuf;

use crate::config::Config;
use crate::util::unauth_error_context;
use crate::util::{add_auth_header_opt, get_auth_header};

pub fn cli() -> clap::Command {
    clap::Command::new("publish")
        .about("Create and update a SpacetimeDB database")
        .arg(
            Arg::new("host_type")
                .long("host-type")
                .short('t')
                .value_parser(["wasm"])
                .default_value("wasm")
                .help("The type of host that should be for hosting this module"),
        )
        .arg(
            // TODO(jdetter): Rename this to --delete-tables (clear doesn't really implies the tables are being dropped)
            Arg::new("clear_database")
                .long("clear-database")
                .short('c')
                .action(SetTrue)
                .help("When publishing a new module to an existing address, also delete all tables associated with the database"),
        )
        .arg(
            Arg::new("path_to_project")
                .value_parser(clap::value_parser!(PathBuf))
                .default_value(".")
                .long("project-path")
                .short('p')
                .help("The system path (absolute or relative) to the module project")
        )
        .arg(
            Arg::new("trace_log")
                .long("trace_log")
                .help("Turn on diagnostic/performance tracing for this project")
                .action(SetTrue),
        )
        // TODO(tyler): We should be able to pass in either an identity or an alias here
        .arg(
            Arg::new("identity")
                .long("identity")
                .short('I')
                .help("The identity that should own the database")
                .long_help("The identity that should own the database. If no identity is provided, your default identity will be used."))
        // TODO(jdetter): add this back in when we actually support this
        // .arg(
        //     Arg::new("as_identity")
        //         .long("as-identity")
        //         .short('i')
        //         .required(false)
        //         .conflicts_with("anon_identity"),
        // )
        .arg(
            Arg::new("anon_identity")
                .long("anon-identity")
                .short('a')
                .action(SetTrue)
                .help("Instruct SpacetimeDB to allocate a new identity to own this database"),
        )
        .arg(
            Arg::new("skip_clippy")
                .long("skip_clippy")
                .short('S')
                .action(SetTrue)
                .env("SPACETIME_SKIP_CLIPPY")
                .value_parser(clap::builder::FalseyValueParser::new())
                .help("Skips running clippy on the module before publishing (intended to speed up local iteration, not recommended for CI)"),
        )
        .arg(
            Arg::new("debug")
                .long("debug")
                .short('d')
                .action(SetTrue)
                .help("Builds the module using debug instead of release (intended to speed up local iteration, not recommended for CI)"),
        )
        .arg(
            Arg::new("name|address")
                .help("A valid domain or address for this database"),
        )
        .arg(
            Arg::new("server")
                .long("server")
                .short('s')
                .help("The nickname, domain name or URL of the server to host the database."),
        )
        .after_help("Run `spacetime help publish` for more detailed information.")
}

pub async fn exec(mut config: Config, args: &ArgMatches) -> Result<(), anyhow::Error> {
    let server = args.get_one::<String>("server").map(|s| s.as_str());
    let identity = args.get_one::<String>("identity").map(String::as_str);
    let name_or_address = args.get_one::<String>("name|address");
    let path_to_project = args.get_one::<PathBuf>("path_to_project").unwrap();
    let host_type = args.get_one::<String>("host_type").unwrap();
    let clear_database = args.get_flag("clear_database");
    let trace_log = args.get_flag("trace_log");
    let anon_identity = args.get_flag("anon_identity");
    let skip_clippy = args.get_flag("skip_clippy");
    let build_debug = args.get_flag("debug");
    let database_host = config.get_host_url(server)?;

    let mut query_params = Vec::<(&str, &str)>::new();
    query_params.push(("host_type", host_type.as_str()));
    query_params.push(("register_tld", "true"));

    // If a domain or address was provided, we should locally make sure it looks correct and
    // append it as a query parameter
    if let Some(name_or_address) = name_or_address {
        if !is_address(name_or_address) {
            parse_domain_name(name_or_address)?;
        }
        query_params.push(("name_or_address", name_or_address.as_str()));
    }

    if !path_to_project.exists() {
        return Err(anyhow::anyhow!(
            "Project path does not exist: {}",
            path_to_project.display()
        ));
    }

    if clear_database {
        query_params.push(("clear", "true"));
    }

    if trace_log {
        query_params.push(("trace_log", "true"));
    }

    let path_to_wasm = if !path_to_project.is_dir() && path_to_project.extension().map_or(false, |ext| ext == "wasm") {
        path_to_project.clone()
    } else {
        crate::tasks::build(path_to_project, skip_clippy, build_debug)?
    };
    let program_bytes = fs::read(path_to_wasm)?;
    println!(
        "Uploading to {} => {}",
        server.unwrap_or(config.default_server_name().unwrap_or("<default>")),
        database_host
    );

    let mut builder = reqwest::Client::new().post(Url::parse_with_params(
        format!("{}/database/publish", database_host).as_str(),
        query_params,
    )?);

    // If the user didn't specify an identity and we didn't specify an anonymous identity, then
    // we want to use the default identity
    // TODO(jdetter): We should maybe have some sort of user prompt here for them to be able to
    //  easily create a new identity with an email

    let (auth_header, identity) = get_auth_header(&mut config, anon_identity, identity, server)
        .await?
        .unzip();

    builder = add_auth_header_opt(builder, &auth_header);

    let res = builder.body(program_bytes).send().await?;
    if res.status() == StatusCode::UNAUTHORIZED && !anon_identity {
        if let Some(identity) = &identity {
            let err = res.text().await?;
            return unauth_error_context(
                Err(anyhow::anyhow!(err)),
                &identity.to_hex(),
                config.server_nick_or_host(server)?,
            );
        }
    }
    if res.status().is_client_error() || res.status().is_server_error() {
        let err = res.text().await?;
        bail!(err)
    }
    let bytes = res.bytes().await.unwrap();

    let response: PublishResult = serde_json::from_slice(&bytes[..]).unwrap();
    match response {
        PublishResult::Success { domain, address, op } => {
            let op = match op {
                PublishOp::Created => "Created new",
                PublishOp::Updated => "Updated",
            };
            if let Some(domain) = domain {
                println!("{} database with domain: {}, address: {}", op, domain, address);
            } else {
                println!("{} database with address: {}", op, address);
            }
        }
        PublishResult::TldNotRegistered { domain } => {
            return Err(anyhow::anyhow!(
                "The top level domain that you provided is not registered.\n\
            This tld is not yet registered to any identity. You can register this domain with the following command:\n\
            \n\
            \tspacetime dns register-tld {}\n",
                domain.tld()
            ));
        }
        PublishResult::PermissionDenied { domain } => {
            return match identity {
                Some(identity) => {
                    //TODO(jdetter): Have a nice name generator here, instead of using some abstract characters
                    // we should perhaps generate fun names like 'green-fire-dragon' instead
                    let suggested_tld: String = identity.to_hex().chars().take(12).collect();
                    if let Some(sub_domain) = domain.sub_domain() {
                        Err(anyhow::anyhow!(
                            "The top level domain {} is not registered to the identity you provided.\n\
                        We suggest you publish to a domain that starts with a TLD owned by you, or publish to a new domain like:\n\
                        \tspacetime publish {}/{}\n",
                            domain.tld(),
                            suggested_tld,
                            sub_domain
                        ))
                    } else {
                        Err(anyhow::anyhow!(
                            "The top level domain {} is not registered to the identity you provided.\n\
                        We suggest you push to either a domain owned by you, or a new domain like:\n\
                        \tspacetime publish {}\n",
                            domain.tld(),
                            suggested_tld
                        ))
                    }
                }
                None => Err(anyhow::anyhow!(
                    "The domain {} is not registered to the identity you provided.",
                    domain
                )),
            };
        }
    }

    Ok(())
}