use super::session::Session;
use crate::{
    language, regular_tasks::queued_command::QueueCommand,
    static_content::possession_type::PossessionType, static_content::room::Direction,
    static_content::species::SpeciesType,
};
use chrono::{DateTime, Utc};
use serde::{Deserialize, Serialize};
use std::collections::BTreeMap;
use std::collections::VecDeque;

#[derive(Serialize, Deserialize, Clone, Debug, Eq, PartialEq, PartialOrd)]
pub enum BuffCause {
    WaitingTask {
        task_code: String,
        task_type: String,
    },
    ByItem {
        item_code: String,
        item_type: String,
    },
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, PartialOrd)]
pub enum BuffImpact {
    ChangeStat { stat: StatType, magnitude: f64 },
    ChangeSkill { skill: SkillType, magnitude: f64 },
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, PartialOrd)]
pub struct Buff {
    pub description: String,
    pub cause: BuffCause,
    pub impacts: Vec<BuffImpact>,
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
pub enum SkillType {
    Appraise,
    Blades,
    Bombs,
    Chemistry,
    Climb,
    Clubs,
    Craft,
    Dodge,
    Fish,
    Fists,
    Flails,
    Focus,
    Fuck,
    Hack,
    Locksmith,
    Medic,
    Persuade,
    Pilot,
    Pistols,
    Quickdraw,
    Repair,
    Ride,
    Rifles,
    Scavenge,
    Science,
    Sneak,
    Spears,
    Swim,
    Teach,
    Throw,
    Track,
    Wrestle,
    Whips,
}

impl SkillType {
    pub fn values() -> Vec<SkillType> {
        use SkillType::*;
        vec![
            Appraise, Blades, Bombs, Chemistry, Climb, Clubs, Craft, Dodge, Fish, Fists, Flails,
            Focus, Fuck, Hack, Locksmith, Medic, Persuade, Pilot, Pistols, Quickdraw, Repair, Ride,
            Rifles, Scavenge, Science, Sneak, Spears, Swim, Teach, Throw, Track, Wrestle, Whips,
        ]
    }
    pub fn display(&self) -> &'static str {
        use SkillType::*;
        match self {
            Appraise => "appraise",
            Blades => "blades",
            Bombs => "bombs",
            Chemistry => "chemistry",
            Climb => "climb",
            Clubs => "clubs",
            Craft => "craft",
            Dodge => "dodge",
            Fish => "fish",
            Fists => "fists",
            Flails => "flails",
            Focus => "focus",
            Fuck => "fuck",
            Hack => "hack",
            Locksmith => "locksmith",
            Medic => "medic",
            Persuade => "persuade",
            Pilot => "pilot",
            Pistols => "pistols",
            Quickdraw => "quickdraw",
            Repair => "repair",
            Ride => "ride",
            Rifles => "rifles",
            Scavenge => "scavenge",
            Science => "science",
            Sneak => "sneak",
            Spears => "spears",
            Swim => "swim",
            Teach => "teach",
            Throw => "throw",
            Track => "track",
            Wrestle => "wrestle",
            Whips => "whips",
        }
    }
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
pub enum StatType {
    Brains,
    Senses,
    Brawn,
    Reflexes,
    Endurance,
    Cool,
}

impl StatType {
    pub fn values() -> Vec<Self> {
        use StatType::*;
        vec![Brains, Senses, Brawn, Reflexes, Endurance, Cool]
    }
    pub fn display(&self) -> &'static str {
        use StatType::*;
        match self {
            Brains => "brains",
            Senses => "senses",
            Brawn => "brawn",
            Reflexes => "reflexes",
            Endurance => "endurance",
            Cool => "cool",
        }
    }
}

#[derive(Serialize, Deserialize, Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]
pub struct Pronouns {
    pub subject: String,
    pub object: String,
    pub intensive: String,
    pub possessive: String,
    // And some miscellaneous details to determine context
    pub is_plural: bool, // ... are instead of ... is
    pub is_proper: bool, // When naming, just ... instead of The ...
}

impl Pronouns {
    pub fn default_inanimate() -> Pronouns {
        Pronouns {
            subject: "it".to_owned(),
            object: "it".to_owned(),
            intensive: "itself".to_owned(),
            possessive: "its".to_owned(),
            is_plural: false,
            is_proper: true,
        }
    }

    pub fn default_animate() -> Pronouns {
        Pronouns {
            subject: "they".to_owned(),
            object: "them".to_owned(),
            intensive: "themselves".to_owned(),
            possessive: "their".to_owned(),
            is_plural: true,
            is_proper: true,
        }
    }

    #[allow(dead_code)]
    pub fn default_male() -> Pronouns {
        Pronouns {
            subject: "he".to_owned(),
            object: "him".to_owned(),
            intensive: "himself".to_owned(),
            possessive: "his".to_owned(),
            is_plural: false,
            is_proper: true,
        }
    }

    #[allow(dead_code)]
    pub fn default_female() -> Pronouns {
        Pronouns {
            subject: "she".to_owned(),
            object: "her".to_owned(),
            intensive: "herself".to_owned(),
            possessive: "her".to_owned(),
            is_plural: false,
            is_proper: true,
        }
    }
}

#[derive(Serialize, Deserialize, Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]
pub enum Subattack {
    Normal,
    Powerattacking,
    Feinting,
    Grabbing,
    Wrestling,
}

#[derive(Serialize, Deserialize, Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]
pub enum LocationActionType {
    Normal,
    Sitting,
    Reclining,
    Worn, // Clothing etc...
    Wielded,
    Attacking(Subattack),
    InstalledOnDoorAsLock(Direction),
}

impl LocationActionType {
    pub fn is_visible_in_look(&self) -> bool {
        use LocationActionType::*;
        match self {
            InstalledOnDoorAsLock(_) => false,
            _ => true,
        }
    }
    pub fn is_in_direction(&self, dir: &Direction) -> bool {
        use LocationActionType::*;
        match self {
            InstalledOnDoorAsLock(d) if d == dir => true,
            _ => false,
        }
    }
}

#[derive(Serialize, Deserialize, Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]
pub enum Sex {
    Male,
    Female,
}

#[derive(Serialize, Deserialize, Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]
pub enum ItemFlag {
    NoSay,
    NoSeeContents,
    DroppedItemsDontExpire,
    PrivatePlace,
    Hireable,
    NPCsDontAttack,
    CanLoad,
}

#[derive(Serialize, Deserialize, Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]
#[serde(default)]
pub struct ActiveCombat {
    pub attacking: Option<String>,
    pub attacked_by: Vec<String>,
}

impl Default for ActiveCombat {
    fn default() -> Self {
        Self {
            attacking: None,
            attacked_by: vec![],
        }
    }
}

#[derive(Serialize, Deserialize, Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]
#[serde(default)]
pub struct ActiveClimb {
    pub height: u64,
}

impl Default for ActiveClimb {
    fn default() -> Self {
        Self { height: 0 }
    }
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, PartialOrd)]
pub enum ItemSpecialData {
    ItemWriting {
        text: String,
    },
    DynroomData {
        dynzone_code: String,
        dynroom_code: String,
    },
    DynzoneData {
        zone_exit: Option<String>,
        vacate_after: Option<DateTime<Utc>>,
    },
    HireData {
        hired_by: Option<String>,
    },
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, PartialOrd)]
pub struct DynamicEntrance {
    pub direction: Direction,
    pub source_item: String,
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, PartialOrd)]
#[serde(default)]
pub struct DoorState {
    pub open: bool,
    pub description: String,
}

impl Default for DoorState {
    fn default() -> Self {
        Self {
            open: false,
            description: "a solid looking wooden door".to_owned(),
        }
    }
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, PartialOrd)]
#[serde(default)]
pub struct DeathData {
    pub parts_remaining: Vec<PossessionType>,
}

impl Default for DeathData {
    fn default() -> Self {
        Self {
            parts_remaining: vec![],
        }
    }
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, PartialOrd)]
pub enum FollowState {
    // Every move is mirrored to the follower.
    Active,
    // If the followee is in the same room, mirror a movement and go to Active,
    // otherwise ignore and don't mirror. This happens after a mirrored move fails,
    // or the follower moves independently.
    IfSameRoom,
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, PartialOrd)]
pub struct FollowData {
    pub follow_whom: String,
    pub state: FollowState,
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, PartialOrd)]
#[serde(default)]
pub struct Item {
    pub item_code: String,
    pub item_type: String,
    pub possession_type: Option<PossessionType>,
    pub display: String,
    pub display_less_explicit: Option<String>,
    pub details: Option<String>,
    pub details_less_explicit: Option<String>,
    pub aliases: Vec<String>,
    pub location: String, // Item reference as item_type/item_code.
    pub action_type: LocationActionType,
    pub action_type_started: Option<DateTime<Utc>>,
    pub presence_target: Option<String>, // e.g. what are they sitting on.
    pub is_static: bool,
    pub death_data: Option<DeathData>,
    pub species: SpeciesType,
    pub health: u64,
    pub total_xp: u64,
    pub total_stats: BTreeMap<StatType, f64>,
    pub total_skills: BTreeMap<SkillType, f64>,
    pub temporary_buffs: Vec<Buff>,
    pub pronouns: Pronouns,
    pub flags: Vec<ItemFlag>,
    pub sex: Option<Sex>,
    pub active_combat: Option<ActiveCombat>,
    pub active_climb: Option<ActiveClimb>,
    pub weight: u64,
    pub charges: u8,
    pub special_data: Option<ItemSpecialData>,
    pub dynamic_entrance: Option<DynamicEntrance>,
    pub owner: Option<String>,
    pub door_states: Option<BTreeMap<Direction, DoorState>>,
    pub following: Option<FollowData>,
    pub queue: VecDeque<QueueCommand>,
}

impl Item {
    pub fn display_for_sentence(&self, explicit_ok: bool, pluralise: usize, caps: bool) -> String {
        let mut buf = String::new();
        if self.death_data.is_some() {
            if pluralise > 1 {
                buf.push_str("the bodies of ");
            } else {
                buf.push_str("the body of ");
            }
        }
        let singular = if explicit_ok {
            &self.display
        } else {
            self.display_less_explicit.as_ref().unwrap_or(&self.display)
        };
        if !self.pronouns.is_proper && pluralise == 1 {
            buf.push_str(language::indefinite_article(&singular));
            buf.push(' ');
        }
        if pluralise > 1 {
            buf.push_str(&format!("{} ", pluralise));
        }
        if pluralise > 1 {
            buf.push_str(&language::pluralise(singular));
        } else {
            buf.push_str(singular);
        }

        if caps {
            language::caps_first(&buf)
        } else {
            buf
        }
    }
    pub fn display_for_session<'l>(self: &'l Self, session: &Session) -> String {
        self.display_for_sentence(!session.less_explicit_mode, 1, false)
    }

    pub fn details_for_session<'l>(self: &'l Self, session: &Session) -> Option<&'l str> {
        self.details.as_ref().map(|dets| {
            session.explicit_if_allowed(
                dets.as_str(),
                self.details_less_explicit.as_ref().map(String::as_str),
            )
        })
    }

    pub fn refstr(&self) -> String {
        format!("{}/{}", &self.item_type, &self.item_code)
    }
}

impl Default for Item {
    fn default() -> Self {
        Self {
            item_code: "unset".to_owned(),
            item_type: "unset".to_owned(),
            possession_type: None,
            display: "Item".to_owned(),
            display_less_explicit: None,
            details: None,
            details_less_explicit: None,
            aliases: vec![],
            location: "room/storage".to_owned(),
            action_type: LocationActionType::Normal,
            action_type_started: None,
            presence_target: None,
            is_static: false,
            death_data: None,
            species: SpeciesType::Human,
            health: 24,
            total_xp: 0,
            total_stats: BTreeMap::new(),
            total_skills: BTreeMap::new(),
            temporary_buffs: Vec::new(),
            pronouns: Pronouns::default_inanimate(),
            flags: vec![],
            sex: None,
            active_combat: Some(Default::default()),
            active_climb: None,
            weight: 0,
            charges: 0,
            special_data: None,
            dynamic_entrance: None,
            owner: None,
            door_states: None,
            following: None,
            queue: VecDeque::new(),
        }
    }
}