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

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

use crate::server::{
    actors::repo::webhook::WebhookAuth,
    config::{RepoConfig, RepoDetails, Webhook},
    gitforge,
};

use self::webhook::WebhookId;

pub struct RepoActor {
    details: RepoDetails,
    webhook: Webhook,
    webhook_id: Option<WebhookId>, // INFO: if [None] then no webhook is configured
    webhook_auth: Option<WebhookAuth>, // INFO: if [None] then no webhook is configured
    last_main_commit: Option<gitforge::Commit>,
    last_next_commit: Option<gitforge::Commit>,
    last_dev_commit: Option<gitforge::Commit>,
    net: Network,
    forge: gitforge::Forge,
}
impl RepoActor {
    pub(crate) fn new(details: RepoDetails, webhook: Webhook, net: Network) -> Self {
        let forge = match details.forge.forge_type {
            #[cfg(feature = "forgejo")]
            crate::server::config::ForgeType::ForgeJo => {
                gitforge::Forge::new_forgejo(details.clone(), net.clone())
            }
            #[cfg(test)]
            crate::server::config::ForgeType::MockForge => gitforge::Forge::new_mock(),
        };
        Self {
            details,
            webhook,
            webhook_id: None,
            webhook_auth: None,
            last_main_commit: None,
            last_next_commit: None,
            last_dev_commit: None,
            net,
            forge,
        }
    }
}
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,
        }
    }
}
impl std::fmt::Display for RepoActor {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(
            f,
            "RepoActor: {}/{}",
            self.details.forge.forge_name, self.details.repo_alias
        )
    }
}

#[derive(Message)]
#[rtype(result = "()")]
pub struct CloneRepo;
impl Handler<CloneRepo> for RepoActor {
    type Result = ();
    #[tracing::instrument(skip_all, fields(%self))]
    fn handle(&mut self, _msg: CloneRepo, ctx: &mut Self::Context) -> Self::Result {
        info!(%self.details, "Clone/Update Repo");
        let gitdir = self.details.gitdir.clone();
        match self.forge.repo_clone(gitdir) {
            Ok(_) => ctx.address().do_send(LoadConfigFromRepo),
            Err(err) => warn!("Could not Clone repo: {err}"),
        }
    }
}

#[derive(Message)]
#[rtype(result = "()")]
pub struct LoadConfigFromRepo;
impl Handler<LoadConfigFromRepo> for RepoActor {
    type Result = ();
    #[tracing::instrument(skip_all, fields(%self))]
    fn handle(&mut self, _msg: LoadConfigFromRepo, ctx: &mut Self::Context) -> Self::Result {
        info!(%self.details, "Loading .git-next.toml from repo");
        let details = self.details.clone();
        let addr = ctx.address();
        let forge = self.forge.clone();
        config::load(details, addr, forge)
            .into_actor(self)
            .wait(ctx);
    }
}

#[derive(Message)]
#[rtype(result = "()")]
struct LoadedConfig(pub RepoConfig);
impl Handler<LoadedConfig> for RepoActor {
    type Result = ();
    #[tracing::instrument(skip_all, fields(%self))]
    fn handle(&mut self, msg: LoadedConfig, ctx: &mut Self::Context) -> Self::Result {
        let repo_config = msg.0;
        info!(%self.details, %repo_config, "Config loaded");
        self.details.repo_config.replace(repo_config);
        if self.webhook_id.is_none() {
            webhook::register(
                self.details.clone(),
                self.webhook.clone(),
                ctx.address(),
                self.net.clone(),
            )
            .into_actor(self)
            .wait(ctx);
        }
        ctx.address().do_send(ValidateRepo);
    }
}

#[derive(Message)]
#[rtype(result = "()")]
pub struct ValidateRepo;
impl Handler<ValidateRepo> for RepoActor {
    type Result = ();
    #[tracing::instrument(skip_all, fields(%self))]
    fn handle(&mut self, _msg: ValidateRepo, ctx: &mut Self::Context) -> Self::Result {
        info!("ValidateRepo");
        if let Some(repo_config) = self.details.repo_config.clone() {
            let forge = self.forge.clone();
            let addr = ctx.address();
            async move { forge.branches_validate_positions(repo_config, addr).await }
                .into_actor(self)
                .wait(ctx);
        }
    }
}

#[derive(Debug, Message)]
#[rtype(result = "()")]
pub struct StartMonitoring {
    pub main: gitforge::Commit,
    pub next: gitforge::Commit,
    pub dev: gitforge::Commit,
    pub dev_commit_history: Vec<gitforge::Commit>,
}
impl Handler<StartMonitoring> for RepoActor {
    type Result = ();
    #[tracing::instrument(skip_all, fields(%self))]
    fn handle(&mut self, msg: StartMonitoring, ctx: &mut Self::Context) -> Self::Result {
        info!("StartMonitoring");
        let Some(repo_config) = self.details.repo_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 webhook = self.webhook.clone();
        let addr = ctx.address();
        let net = self.net.clone();
        let forge = self.forge.clone();

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

#[derive(Message)]
#[rtype(result = "()")]
pub struct WebhookRegistered(pub WebhookId, pub WebhookAuth);
impl Handler<WebhookRegistered> for RepoActor {
    type Result = ();
    #[tracing::instrument(skip_all, fields(%self))]
    fn handle(&mut self, msg: WebhookRegistered, _ctx: &mut Self::Context) -> Self::Result {
        self.webhook_id.replace(msg.0);
        self.webhook_auth.replace(msg.1);
    }
}

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