use crate::{
    column::Columns,
    route::{Route, Router},
    timeline::{ThreadSelection, TimelineCache, TimelineKind},
};

use enostr::{Pubkey, RelayPool};
use nostrdb::{Ndb, NoteKey, Transaction};
use notedeck::{
    get_wallet_for_mut, Accounts, GlobalWallet, NoteAction, NoteCache, NoteZapTargetOwned,
    UnknownIds, ZapAction, ZapTarget, ZappingError, Zaps,
};
use tracing::error;

pub struct NewNotes {
    pub id: TimelineKind,
    pub notes: Vec<NoteKey>,
}

pub enum TimelineOpenResult {
    NewNotes(NewNotes),
}

/// The note action executor for notedeck_columns
#[allow(clippy::too_many_arguments)]
fn execute_note_action(
    action: &NoteAction,
    ndb: &Ndb,
    router: &mut Router<Route>,
    timeline_cache: &mut TimelineCache,
    note_cache: &mut NoteCache,
    pool: &mut RelayPool,
    txn: &Transaction,
    accounts: &mut Accounts,
    global_wallet: &mut GlobalWallet,
    zaps: &mut Zaps,
    ui: &mut egui::Ui,
) -> Option<TimelineOpenResult> {
    match action {
        NoteAction::Reply(note_id) => {
            router.route_to(Route::reply(*note_id));
            None
        }

        NoteAction::Profile(pubkey) => {
            let kind = TimelineKind::Profile(*pubkey);
            router.route_to(Route::Timeline(kind.clone()));
            timeline_cache.open(ndb, note_cache, txn, pool, &kind)
        }

        NoteAction::Note(note_id) => 'ex: {
            let Ok(thread_selection) =
                ThreadSelection::from_note_id(ndb, note_cache, txn, *note_id)
            else {
                tracing::error!("No thread selection for {}?", hex::encode(note_id.bytes()));
                break 'ex None;
            };

            let kind = TimelineKind::Thread(thread_selection);
            router.route_to(Route::Timeline(kind.clone()));
            // NOTE!!: you need the note_id to timeline root id thing

            timeline_cache.open(ndb, note_cache, txn, pool, &kind)
        }

        NoteAction::Hashtag(htag) => {
            let kind = TimelineKind::Hashtag(htag.clone());
            router.route_to(Route::Timeline(kind.clone()));
            timeline_cache.open(ndb, note_cache, txn, pool, &kind)
        }

        NoteAction::Quote(note_id) => {
            router.route_to(Route::quote(*note_id));
            None
        }

        NoteAction::Zap(zap_action) => 's: {
            let Some(cur_acc) = accounts.get_selected_account_mut() else {
                break 's None;
            };

            let sender = cur_acc.key.pubkey;

            match zap_action {
                ZapAction::Send(target) => {
                    if get_wallet_for_mut(accounts, global_wallet, sender.bytes()).is_some() {
                        send_zap(&sender, zaps, pool, target)
                    } else {
                        zaps.send_error(
                            sender.bytes(),
                            ZapTarget::Note(target.into()),
                            ZappingError::SenderNoWallet,
                        );
                    }
                }
                ZapAction::ClearError(target) => clear_zap_error(&sender, zaps, target),
            }

            None
        }

        NoteAction::Context(context) => {
            match ndb.get_note_by_key(txn, context.note_key) {
                Err(err) => tracing::error!("{err}"),
                Ok(note) => {
                    context.action.process(ui, &note, pool);
                }
            }
            None
        }
    }
}

/// Execute a NoteAction and process the result
#[allow(clippy::too_many_arguments)]
pub fn execute_and_process_note_action(
    action: &NoteAction,
    ndb: &Ndb,
    columns: &mut Columns,
    col: usize,
    timeline_cache: &mut TimelineCache,
    note_cache: &mut NoteCache,
    pool: &mut RelayPool,
    txn: &Transaction,
    unknown_ids: &mut UnknownIds,
    accounts: &mut Accounts,
    global_wallet: &mut GlobalWallet,
    zaps: &mut Zaps,
    ui: &mut egui::Ui,
) {
    let router = columns.column_mut(col).router_mut();
    if let Some(br) = execute_note_action(
        action,
        ndb,
        router,
        timeline_cache,
        note_cache,
        pool,
        txn,
        accounts,
        global_wallet,
        zaps,
        ui,
    ) {
        br.process(ndb, note_cache, txn, timeline_cache, unknown_ids);
    }
}

fn send_zap(sender: &Pubkey, zaps: &mut Zaps, pool: &RelayPool, target: &NoteZapTargetOwned) {
    let default_zap_msats = 10_000; // TODO(kernelkind): allow the user to set this default
    let zap_target = ZapTarget::Note(target.into());

    let sender_relays: Vec<String> = pool.relays.iter().map(|r| r.url().to_string()).collect();
    zaps.send_zap(sender.bytes(), sender_relays, zap_target, default_zap_msats);
}

fn clear_zap_error(sender: &Pubkey, zaps: &mut Zaps, target: &NoteZapTargetOwned) {
    zaps.clear_error_for(sender.bytes(), ZapTarget::Note(target.into()));
}

impl TimelineOpenResult {
    pub fn new_notes(notes: Vec<NoteKey>, id: TimelineKind) -> Self {
        Self::NewNotes(NewNotes::new(notes, id))
    }

    pub fn process(
        &self,
        ndb: &Ndb,
        note_cache: &mut NoteCache,
        txn: &Transaction,
        storage: &mut TimelineCache,
        unknown_ids: &mut UnknownIds,
    ) {
        match self {
            // update the thread for next render if we have new notes
            TimelineOpenResult::NewNotes(new_notes) => {
                new_notes.process(storage, ndb, txn, unknown_ids, note_cache);
            }
        }
    }
}

impl NewNotes {
    pub fn new(notes: Vec<NoteKey>, id: TimelineKind) -> Self {
        NewNotes { notes, id }
    }

    /// Simple helper for processing a NewThreadNotes result. It simply
    /// inserts/merges the notes into the corresponding timeline cache
    pub fn process(
        &self,
        timeline_cache: &mut TimelineCache,
        ndb: &Ndb,
        txn: &Transaction,
        unknown_ids: &mut UnknownIds,
        note_cache: &mut NoteCache,
    ) {
        let reversed = matches!(&self.id, TimelineKind::Thread(_));

        let timeline = if let Some(profile) = timeline_cache.timelines.get_mut(&self.id) {
            profile
        } else {
            error!("NewNotes: could not get timeline for key {}", self.id);
            return;
        };

        if let Err(err) = timeline.insert(&self.notes, ndb, txn, unknown_ids, note_cache, reversed)
        {
            error!("error inserting notes into profile timeline: {err}")
        }
    }
}