use chrono::{DateTime, Utc};
use clickhouse::Row;
use clickhouse_pool::traits::Model;
use serde::{Deserialize, Serialize};
use serde_repr::{Deserialize_repr, Serialize_repr};
use uuid::Uuid;

#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Serialize_repr, Deserialize_repr)]
#[repr(u8)]
pub enum TrivialRewardKind {
    OnlyTheFirstOne = 0,
    TopThree = 1,
    TopFive = 2,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Serialize_repr, Deserialize_repr)]
#[repr(u8)]
pub enum TrivialStatus {
    Init = 0,
    Started = 1,
    Finished = 2,
    Paused = 3,
}

#[derive(Debug, Clone, PartialEq, PartialOrd, Row, Serialize, Deserialize)]
pub struct Trivial {
    #[serde(with = "clickhouse::serde::uuid")]
    pub id: Uuid,
    pub name: String,
    pub description: String,

    pub guild_id: u64,
    pub channel_id: u64,

    #[serde(with = "clickhouse::serde::chrono::datetime64::millis")]
    pub created_at: DateTime<Utc>,
    #[serde(with = "clickhouse::serde::chrono::datetime64::millis")]
    pub updated_at: DateTime<Utc>,

    pub creator_id: u64,
    pub updater_id: u64,

    pub random_question: bool,
    pub role_ping: u64,
    pub role_ping_enabled: bool,
    pub reward_kind: TrivialRewardKind,
    pub reward_amount: u64,
    /// Whether or not the bot should send an ephemeral message to the user when their answer is taken into account.
    pub taken_into_account: bool,
    pub status: TrivialStatus,
}

impl Default for Trivial {
    fn default() -> Self {
        Self {
            id: Uuid::new_v4(),
            name: String::new(),
            description: String::new(),
            guild_id: 0,
            channel_id: 0,
            created_at: Utc::now(),
            updated_at: Utc::now(),
            creator_id: 0,
            updater_id: 0,
            random_question: true,
            role_ping: 0,
            role_ping_enabled: false,
            reward_kind: TrivialRewardKind::TopThree,
            reward_amount: 3,
            taken_into_account: true,
            status: TrivialStatus::Init,
        }
    }
}

impl Trivial {
    pub fn new(
        name: String,
        description: String,
        guild_id: u64,
        channel_id: u64,
        creator_id: u64,
        updater_id: u64,
    ) -> Self {
        Self {
            name,
            description,
            guild_id,
            channel_id,
            creator_id,
            updater_id,
            ..Default::default()
        }
    }
}

impl Model for Trivial {
    type T = Trivial;

    fn table_name() -> &'static str {
        "trivial"
    }

    fn create_table_sql() -> &'static str {
        r#"
        CREATE TABLE IF NOT EXISTS trivial (
            id UUID PRIMARY KEY,
            name String,
            description String,
            guild_id UInt64,
            channel_id UInt64,
            created_at DateTime64(3, 'UTC'),
            updated_at DateTime64(3, 'UTC'),
            creator_id UInt64,
            updater_id UInt64,
            random_question Bool,
            role_ping UInt64,
            role_ping_enabled Bool,
            reward_kind Enum8('OnlyTheFirstOne' = 0, 'TopThree' = 1, 'TopFive' = 2),
            reward_amount UInt64,
            taken_into_account Bool,
            status Enum8('Init' = 0, 'Started' = 1, 'Finished' = 2, 'Paused' = 3)
        ) ENGINE = MergeTree()
        ORDER BY id
        "#
    }

    fn column_names() -> Vec<&'static str> {
        vec![
            "id",
            "name",
            "description",
            "guild_id",
            "channel_id",
            "created_at",
            "updated_at",
            "creator_id",
            "updater_id",
            "random_question",
            "role_ping",
            "role_ping_enabled",
            "reward_kind",
            "reward_amount",
            "taken_into_account",
            "status",
        ]
    }

    fn to_row(&self) -> (Vec<&'static str>, Vec<String>) {
        (
            Self::column_names(),
            vec![
                format!("'{}'", self.id),
                format!("'{}'", self.name),
                format!("'{}'", self.description),
                self.guild_id.to_string(),
                self.channel_id.to_string(),
                format!("'{}'", self.created_at.to_rfc3339()),
                format!("'{}'", self.updated_at.to_rfc3339()),
                self.creator_id.to_string(),
                self.updater_id.to_string(),
                self.random_question.to_string(),
                self.role_ping.to_string(),
                self.role_ping_enabled.to_string(),
                format!("'{:?}'", serde_json::to_string(&self.reward_kind)),
                self.reward_amount.to_string(),
                self.taken_into_account.to_string(),
                format!("'{:?}'", serde_json::to_string(&self.status)),
            ],
        )
    }

    fn insert_query(&self) -> String {
        let (columns, values) = self.to_row();
        let columns_str = columns.join(", ");
        let values_str = values.join(", ");
        format!(
            "INSERT INTO {} ({}) VALUES ({})",
            Self::table_name(),
            columns_str,
            values_str
        )
    }

    fn batch_insert_query(items: &[Self::T]) -> String {
        let mut queries = Vec::new();
        for item in items {
            let (columns, values) = item.to_row();
            let columns_str = columns.join(", ");
            let values_str = values.join(", ");
            queries.push(format!(
                "INSERT INTO {} ({}) VALUES ({})",
                Self::table_name(),
                columns_str,
                values_str
            ));
        }
        queries.join("; ")
    }

    fn build_select_query(
        where_clause: Option<&str>,
        limit: Option<u64>,
        offset: Option<u64>,
    ) -> String {
        let mut query = format!("SELECT * FROM {}", Self::table_name());
        if let Some(where_clause) = where_clause {
            query.push_str(&format!(" WHERE {}", where_clause));
        }
        if let Some(limit) = limit {
            query.push_str(&format!(" LIMIT {}", limit));
        }
        if let Some(offset) = offset {
            query.push_str(&format!(" OFFSET {}", offset));
        }
        query
    }
}