mod branch;
mod config;
pub mod status;
mod webhook;

use actix::prelude::*;
use kxio::network::Network;
use tracing::{info, warn};

use crate::server::{
    config::{RepoConfig, RepoDetails},
    forge,
    git::Git,
};

use self::webhook::WebhookId;

pub struct RepoActor {
    details: RepoDetails,
    config: Option<RepoConfig>, // INFO: if [None] then send [StartRepo] to populate it
    webhook_id: Option<WebhookId>, // INFO: if [None] then no webhook is configured
    net: Network,
    git: Git,
}
impl RepoActor {
    pub(crate) const fn new(details: RepoDetails, net: Network, git: Git) -> Self {
        Self {
            details,
            config: None,
            webhook_id: None,
            net,
            git,
        }
    }
}
impl Actor for RepoActor {
    type Context = Context<Self>;
    fn stopping(&mut self, ctx: &mut Self::Context) -> Running {
        match self.webhook_id.take() {
            Some(webhook_id) => {
                let repo_details = self.details.clone();
                let net = self.net.clone();
                webhook::unregister(webhook_id, repo_details, net)
                    .into_actor(self)
                    .wait(ctx);
                Running::Continue
            }
            None => Running::Stop,
        }
    }
}

#[derive(Message)]
#[rtype(result = "()")]
pub struct StartRepo;
impl Handler<StartRepo> for RepoActor {
    type Result = ();
    fn handle(&mut self, _msg: StartRepo, ctx: &mut Self::Context) -> Self::Result {
        info!(%self.details, "Starting Repo");
        let details = self.details.clone();
        let addr = ctx.address();
        let net = self.net.clone();
        config::load(details, addr, net).into_actor(self).wait(ctx);
    }
}

#[derive(Message)]
#[rtype(result = "()")]
struct LoadedConfig(pub RepoConfig);
impl Handler<LoadedConfig> for RepoActor {
    type Result = ();
    fn handle(&mut self, msg: LoadedConfig, ctx: &mut Self::Context) -> Self::Result {
        let config = msg.0;
        info!(%self.details, %config, "Config loaded");
        self.config.replace(config);
        ctx.address().do_send(ValidateRepo);
    }
}

#[derive(Message)]
#[rtype(result = "()")]
pub struct ValidateRepo;
impl Handler<ValidateRepo> for RepoActor {
    type Result = ();
    fn handle(&mut self, _msg: ValidateRepo, ctx: &mut Self::Context) -> Self::Result {
        if let Some(repo_config) = self.config.clone() {
            let repo_details = self.details.clone();
            let addr = ctx.address();
            let net = self.net.clone();
            let git = self.git.clone();
            branch::validate_positions(repo_details, repo_config, addr, git, net)
                .into_actor(self)
                .wait(ctx);
        }
    }
}

#[derive(Debug, Message)]
#[rtype(result = "()")]
pub struct StartMonitoring {
    pub main: forge::Commit,
    pub next: forge::Commit,
    pub dev: forge::Commit,
    pub dev_commit_history: Vec<forge::Commit>,
}
impl Handler<StartMonitoring> for RepoActor {
    type Result = ();
    fn handle(&mut self, msg: StartMonitoring, ctx: &mut Self::Context) -> Self::Result {
        let Some(repo_config) = self.config.clone() else {
            warn!("No config loaded");
            return;
        };

        let next_ahead_of_main = msg.main != msg.next;
        let dev_ahead_of_next = msg.next != msg.dev;
        info!(%msg.main, %msg.next, %msg.dev, next_ahead_of_main, dev_ahead_of_next, "StartMonitoring");

        let repo_details = self.details.clone();
        let addr = ctx.address();
        let net = self.net.clone();
        let git = self.git.clone();

        if next_ahead_of_main {
            status::check_next(msg.next, repo_details, addr, net)
                .into_actor(self)
                .wait(ctx);
        } else if dev_ahead_of_next {
            branch::advance_next(
                msg.next,
                msg.dev_commit_history,
                repo_details,
                repo_config,
                addr,
                git,
            )
            .into_actor(self)
            .wait(ctx);
        } else if self.webhook_id.is_none() {
            webhook::register(repo_details, addr, net)
                .into_actor(self)
                .wait(ctx);
        }
    }
}

#[derive(Message)]
#[rtype(result = "()")]
pub struct WebhookRegistered(pub WebhookId);
impl Handler<WebhookRegistered> for RepoActor {
    type Result = ();
    fn handle(&mut self, msg: WebhookRegistered, _ctx: &mut Self::Context) -> Self::Result {
        self.webhook_id.replace(msg.0);
    }
}

#[derive(Message)]
#[rtype(result = "()")]
pub struct AdvanceMainTo(pub forge::Commit);
impl Handler<AdvanceMainTo> for RepoActor {
    type Result = ();
    fn handle(&mut self, msg: AdvanceMainTo, ctx: &mut Self::Context) -> Self::Result {
        let repo_details = self.details.clone();
        let Some(repo_config) = self.config.clone() else {
            warn!("No config loaded");
            return;
        };
        let git = self.git.clone();
        branch::advance_main(msg.0, repo_details, repo_config, git)
            .into_actor(self)
            .wait(ctx);
    }
}