use super::{VerbContext, UserVerb, UserVerbRef, UResult, user_error,
            get_player_item_or_fail, search_item_for_user};
use async_trait::async_trait;
use ansi::ansi;
use crate::services::broadcast_to_room;
use crate::db::{DBTrans, ItemSearchParams};
use crate::models::{item::{Item, LocationActionType, Subattack}};
use async_recursion::async_recursion;

pub async fn stop_attacking(trans: &DBTrans, by_whom: &Item, to_whom: &Item) -> UResult<()> {
    let mut new_to_whom = (*to_whom).clone();
    if let Some(ac) = new_to_whom.active_combat.as_mut() {
        let old_attacker = format!("{}/{}", by_whom.item_type, by_whom.item_code);
        ac.attacked_by.retain(|v| v != &old_attacker);
        trans.save_item_model(&new_to_whom).await?;
    }
    let mut new_by_whom = (*by_whom).clone();
    if let Some(ac) = new_by_whom.active_combat.as_mut() {
        ac.attacking = None;
    }
    new_by_whom.action_type = LocationActionType::Normal;
    trans.save_item_model(&new_by_whom).await?;
    
    Ok(())
}

#[async_recursion]
pub async fn start_attack(trans: &DBTrans, by_whom: &Item, to_whom: &Item) -> UResult<()> {
    let mut msg_exp = String::new();
    let mut msg_nonexp = String::new();
    let mut verb: String = "attacks".to_string();
    match by_whom.action_type {
        LocationActionType::Sitting | LocationActionType::Reclining => {
            msg_exp.push_str(&format!(ansi!("{} stands up.\n"), &by_whom.display));
            msg_nonexp.push_str(&format!(ansi!("{} stands up.\n"),
                                         by_whom.display_less_explicit.as_ref().unwrap_or(&by_whom.display)));
        },
        LocationActionType::Attacking(_) => {
            match by_whom.active_combat.as_ref().and_then(|ac| ac.attacking.as_ref().and_then(|s| s.split_once("/"))) {
                Some((cur_type, cur_code)) if cur_type == to_whom.item_type && cur_code == to_whom.item_code =>
                    user_error(format!("You're already attacking {}!", to_whom.pronouns.object))?,
                Some((cur_type, cur_code)) => {
                    if let Some(cur_item_arc) = trans.find_item_by_type_code(cur_type, cur_code).await? {
                        stop_attacking(trans, by_whom, &cur_item_arc).await?;
                    }
                }
                _ => {}
            }
            verb = "refocuses ".to_string() + &by_whom.pronouns.possessive + " attacks on";
        },
        _ => {}
    }
    msg_exp.push_str(&format!(
        ansi!("<red>{} {} {}.<reset>\n"),
        &by_whom.display_for_sentence(true, 1, true),
        verb,
        &to_whom.display_for_sentence(true, 1, false))
    );
    msg_nonexp.push_str(&format!(
        ansi!("<red>{} {} {}.<reset>\n"),
        &by_whom.display_for_sentence(false, 1, true),
        verb,
        &to_whom.display_for_sentence(false, 1, false))
    );
    broadcast_to_room(trans, &by_whom.location, None, &msg_exp, Some(msg_nonexp.as_str())).await?;

    let mut by_whom_for_update = by_whom.clone();
    by_whom_for_update.active_combat.get_or_insert_with(|| Default::default()).attacking =
        Some(format!("{}/{}",
                     &to_whom.item_type, &to_whom.item_code));
    by_whom_for_update.action_type = LocationActionType::Attacking(Subattack::Normal);
    let mut to_whom_for_update = to_whom.clone();
    to_whom_for_update.active_combat.get_or_insert_with(|| Default::default()).attacked_by.push(
        format!("{}/{}",
                &by_whom.item_type, &by_whom.item_code)
    );

    trans.save_item_model(&by_whom_for_update).await?;
    trans.save_item_model(&to_whom_for_update).await?;
    // Auto-counterattack if victim isn't busy.
    if to_whom_for_update.active_combat.as_ref().and_then(|ac| ac.attacking.as_ref()) == None {
        start_attack(trans, &to_whom_for_update, &by_whom_for_update).await?;
    }

        Ok(())
}

pub struct Verb;
#[async_trait]
impl UserVerb for Verb {
    async fn handle(self: &Self, ctx: &mut VerbContext, _verb: &str, remaining: &str) -> UResult<()> {
        let player_item = get_player_item_or_fail(ctx).await?;
        let attack_whom = search_item_for_user(ctx, &ItemSearchParams {
            include_loc_contents: true,
            ..ItemSearchParams::base(&player_item, remaining)
        }).await?;

        match attack_whom.item_type.as_str() {
            "npc" => {}
            "player" => {},
            _ => user_error("Only characters (players / NPCs) accept whispers".to_string())?
        }

        if attack_whom.item_code == player_item.item_code && attack_whom.item_type == player_item.item_type {
            user_error("That's you, silly!".to_string())?
        }

        if attack_whom.is_challenge_attack_only {
            // Add challenge check here.
            user_error(ansi!("<blue>Your wristpad vibrates and blocks you from doing that.<reset> You get a feeling that while the empire might be gone, the system to stop subjects with working wristpads from fighting each unless they have an accepted challenge very much functional. [Try <bold>help challenge<reset>]").to_string())?
        }
        
        start_attack(&ctx.trans, &player_item, &attack_whom).await
    }
}
static VERB_INT: Verb = Verb;
pub static VERB: UserVerbRef = &VERB_INT as UserVerbRef;