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use keri_core::actor::prelude::{HashFunctionCode, SelfAddressingIdentifier, SerializationFormats};
use keri_core::event::sections::seal::{EventSeal, Seal};
use keri_core::event_message::msg::KeriEvent;
use keri_core::event_message::timestamped::Timestamped;
use keri_core::prefix::IdentifierPrefix;
use teliox::event::verifiable_event::VerifiableEvent;
use teliox::query::{TelQueryArgs, TelQueryEvent, TelQueryRoute};
use teliox::seal::{AttachedSourceSeal, EventSourceSeal};

use crate::error::ControllerError;

use super::IdentifierController;

impl IdentifierController {
    /// Generate `vcp` event and `ixn` event with  seal to `vcp`. To finalize
    /// the process, `ixn` need to be signed confirmed with `finalize_event`
    /// function.
    pub fn incept_registry(&mut self) -> Result<(IdentifierPrefix, Vec<u8>), ControllerError> {
        // Create tel
        let tel = self.source.tel.clone();

        let vcp = tel.make_inception_event(
            self.id.clone(),
            vec![teliox::event::manager_event::Config::NoBackers],
            0,
            vec![],
        )?;
        let id = vcp.get_prefix();
        let seal = Seal::Event(EventSeal {
            prefix: vcp.get_prefix(),
            sn: vcp.get_sn(),
            event_digest: vcp.get_digest()?,
        });
        let ixn = self.anchor_with_seal(&[seal])?;
        let source_seal = EventSourceSeal {
            sn: ixn.data.sn,
            digest: ixn.digest()?,
        };
        let encoded = ixn.encode()?;

        let verifiable_event = VerifiableEvent {
            event: vcp,
            seal: AttachedSourceSeal { seal: source_seal },
        };

        tel.processor.process(verifiable_event)?;
        self.registry_id = Some(id.clone());

        Ok((id, encoded))
    }

    /// Generate `iss` event and `ixn` event with  seal to `iss`. To finalize
    /// the process, `ixn` need to be signed confirmed with `finalize_event`
    /// function.
    pub fn issue(
        &self,
        credential_digest: SelfAddressingIdentifier,
    ) -> Result<(IdentifierPrefix, Vec<u8>), ControllerError> {
        match self.registry_id.as_ref() {
            Some(registry_id) => {
                let tel = self.source.tel.clone();
                let iss = tel.make_issuance_event(registry_id, credential_digest)?;

                let vc_hash = iss.get_prefix();
                let seal = Seal::Event(EventSeal {
                    prefix: iss.get_prefix(),
                    sn: iss.get_sn(),
                    event_digest: iss.get_digest()?,
                });
                let ixn = self.anchor_with_seal(&[seal])?;

                let source_seal = EventSourceSeal {
                    sn: ixn.data.sn,
                    digest: ixn.digest()?,
                };
                let encoded_ixn = ixn.encode()?;

                let verifiable_event = VerifiableEvent {
                    event: iss,
                    seal: AttachedSourceSeal { seal: source_seal },
                };
                tel.processor.process(verifiable_event)?;

                Ok((vc_hash, encoded_ixn))
            }
            None => Err(ControllerError::OtherError("Tel not incepted".into())),
        }
    }

    /// Generate `rev` event and `ixn` event with  seal to `rev`. To finalize
    /// the process, `ixn` need to be signed confirmed with `finalize_event`
    /// function.
    pub fn revoke(
        &self,
        credential_sai: &SelfAddressingIdentifier,
    ) -> Result<Vec<u8>, ControllerError> {
        match &self.registry_id {
            Some(registry_id) => {
                let tel = self.source.tel.clone();
                let rev = tel.make_revoke_event(registry_id, credential_sai)?;

                let seal = Seal::Event(EventSeal {
                    prefix: rev.get_prefix(),
                    sn: rev.get_sn(),
                    event_digest: rev.get_digest()?,
                });
                let ixn = self.anchor_with_seal(&[seal])?;

                let source_seal = EventSourceSeal {
                    sn: ixn.data.sn,
                    digest: ixn.digest()?,
                };
                let encoded_ixn = ixn.encode()?;

                let verifiable_event = VerifiableEvent {
                    event: rev,
                    seal: AttachedSourceSeal { seal: source_seal },
                };
                tel.processor.process(verifiable_event)?;

                Ok(encoded_ixn)
            }
            None => Err(ControllerError::OtherError("Tel not incepted".into())),
        }
    }

    pub fn query_tel(
        &self,
        registry_id: IdentifierPrefix,
        vc_identifier: IdentifierPrefix,
    ) -> Result<TelQueryEvent, ControllerError> {
        let route = TelQueryRoute::Tels {
            reply_route: "".into(),
            args: TelQueryArgs {
                i: Some(vc_identifier),
                ri: Some(registry_id),
            },
        };
        let env = Timestamped::new(route);
        Ok(KeriEvent::new(
            SerializationFormats::JSON,
            HashFunctionCode::Blake3_256.into(),
            env,
        )?)
    }

    pub async fn notify_backers(&self) -> Result<(), ControllerError> {
        let to_notify = self.source.tel.recently_added_events.get();
        let backers = self.source.get_current_witness_list(&self.id)?;
        for backer in backers {
            let location = self
                .source
                .get_loc_schemas(&IdentifierPrefix::Basic(backer))?[0]
                .clone();
            for event in &to_notify {
                self.source
                    .tel_transport
                    .send_tel_event(event.clone(), location.clone())
                    .await
                    .map_err(|e| ControllerError::OtherError(e.to_string()))?;
            }
        }
        Ok(())
    }
}