// Copyright (C) 2024-2026 Whiterun LLC
//
// This software is licensed under the GNU Affero General Public License (AGPL), version 3.0 or later.
// A copy of the license can be found in the LICENSE file or at https://www.gnu.org/licenses/agpl-3.0.html

use anyhow::Result;
use rusqlite::{params_from_iter, Connection};

use crate::bcmr::parsedbcmr::ParsedBCMR;
use crate::db::bcmr::{get_token_bcmr, get_well_known_bcmr};
use crate::db::cauldron::tokenlist::db_utils::{order_clause, CachedSort};

#[derive(Serialize)]
pub struct TokenListItemCached {
    pub token_id: String,
    pub trade_volume: u64,
    pub tvl_sats: u64,
    pub tvl_tokens: u64,
    pub bcmr_well_known: Vec<ParsedBCMR>,
    pub bcmr: Option<ParsedBCMR>,
    pub trade_count: u64,
    pub score: i64,
    pub score_rank: i64,
    pub price_now: f64,               // NOT NULL
    pub price_24h: Option<f64>,       // NULL → None, 0.0 → Some(0.0)
    pub price_7d: Option<f64>,        // "
    pub change_24h_bp: Option<i64>,   // "
    pub change_7d_bp: Option<i64>,    // "
    pub display_name: Option<String>, // NULL → None, "" → Some("")
    pub display_symbol: Option<String>,
    pub price_now_usd: f64, // NOT NULL
    pub price_24h_usd: Option<f64>,
    pub price_7d_usd: Option<f64>,
    pub change_24h_usd_bp: Option<i64>,
    pub change_7d_usd_bp: Option<i64>,
    pub apy_30d_bp: Option<i64>,
}

const TOKEN_METRICS_COLUMNS: &str = r#"
    hex(token_id) as token_id,
    trade_volume,
    tvl_sats,
    tvl_tokens,
    score,
    price_now,
    price_24h,
    price_7d,
    change_24h_bp,
    change_7d_bp,
    display_name,
    display_symbol,
    price_now_usd,
    price_24h_usd,
    price_7d_usd,
    change_24h_usd_bp,
    change_7d_usd_bp,
    apy_30d_bp,
    score_rank
"#;

pub fn db_list_tokens_cached(
    cauldron_conn: &Connection,
    bcmr_conn: &Connection,
    limit: usize,
    offset: usize,
    sort: CachedSort,
) -> Result<Vec<TokenListItemCached>> {
    let order_sql = order_clause(sort);
    let sql = format!(
        r#"
        SELECT
            {cols}
        FROM cached_token_metrics
        WHERE tvl_sats > 0
        {order_sql}
        LIMIT ?1 OFFSET ?2
        "#,
        cols = TOKEN_METRICS_COLUMNS,
        order_sql = order_sql
    );

    let mut stmt = cauldron_conn.prepare(&sql)?;
    let mut rows = stmt.query(rusqlite::params![limit as i64, offset as i64])?;
    let mut tokens = Vec::with_capacity(limit);

    while let Some(row) = rows.next()? {
        let token_id: String = row.get::<_, String>("token_id")?.to_lowercase();
        let trade_volume: u64 = row.get("trade_volume")?;
        let tvl_sats: u64 = row.get::<_, i64>("tvl_sats")? as u64;
        let tvl_tokens: u64 = row.get::<_, i64>("tvl_tokens")? as u64;
        let score: i64 = row.get("score")?;
        let price_now: f64 = row.get("price_now")?;
        let price_24h: Option<f64> = row.get("price_24h")?;
        let price_7d: Option<f64> = row.get("price_7d")?;
        let change_24h_bp: Option<i64> = row.get("change_24h_bp")?;
        let change_7d_bp: Option<i64> = row.get("change_7d_bp")?;
        let display_name: Option<String> = row.get("display_name")?;
        let display_symbol: Option<String> = row.get("display_symbol")?;
        let price_now_usd: f64 = row.get("price_now_usd")?;
        let price_24h_usd: Option<f64> = row.get("price_24h_usd")?;
        let price_7d_usd: Option<f64> = row.get("price_7d_usd")?;
        let change_24h_usd_bp: Option<i64> = row.get("change_24h_usd_bp")?;
        let change_7d_usd_bp: Option<i64> = row.get("change_7d_usd_bp")?;
        let apy_30d_bp: Option<i64> = row.get("apy_30d_bp")?;
        let score_rank: i64 = row.get("score_rank")?;

        let bcmr = get_token_bcmr(bcmr_conn, &token_id)?;
        let bcmr_well_known = get_well_known_bcmr(bcmr_conn, &token_id)?;

        tokens.push(TokenListItemCached {
            token_id,
            trade_volume,
            tvl_sats,
            tvl_tokens,
            bcmr,
            bcmr_well_known,
            trade_count: 0,
            score,
            score_rank,
            price_now,
            price_24h,
            price_7d,
            change_24h_bp,
            change_7d_bp,
            display_name,
            display_symbol,
            price_now_usd,
            price_24h_usd,
            price_7d_usd,
            change_24h_usd_bp,
            change_7d_usd_bp,
            apy_30d_bp,
        });
    }

    Ok(tokens)
}

pub fn db_list_tokens_cached_by_ids(
    cauldron_conn: &Connection,
    bcmr_conn: &Connection,
    token_ids: &[String],
    sort: CachedSort,
) -> Result<Vec<TokenListItemCached>> {
    if token_ids.is_empty() {
        return Ok(vec![]);
    }

    let order_sql = order_clause(sort);
    let placeholders = vec!["?"; token_ids.len()].join(",");

    let sql = format!(
        r#"
        SELECT
            {cols}
        FROM cached_token_metrics
        WHERE token_id IN ({ph}) AND tvl_sats > 0
        {order_sql}
        "#,
        cols = TOKEN_METRICS_COLUMNS,
        ph = placeholders,
        order_sql = order_sql
    );
    let token_blobs: Vec<Vec<u8>> = token_ids
        .iter()
        .filter_map(|s| hex::decode(s).ok())
        .collect();

    let mut stmt = cauldron_conn.prepare(&sql)?;
    let mut rows = stmt.query(params_from_iter(token_blobs.iter()))?;

    let mut tokens = Vec::with_capacity(token_ids.len());
    while let Some(row) = rows.next()? {
        let token_id: String = row.get::<_, String>("token_id")?.to_lowercase();
        let trade_volume: u64 = row.get("trade_volume")?;
        let tvl_sats: u64 = row.get::<_, i64>("tvl_sats")? as u64;
        let tvl_tokens: u64 = row.get::<_, i64>("tvl_tokens")? as u64;
        let score: i64 = row.get("score")?;

        let price_now: f64 = row.get("price_now")?;
        let price_24h: Option<f64> = row.get("price_24h")?;
        let price_7d: Option<f64> = row.get("price_7d")?;
        let change_24h_bp: Option<i64> = row.get("change_24h_bp")?;
        let change_7d_bp: Option<i64> = row.get("change_7d_bp")?;

        let display_name: Option<String> = row.get("display_name")?;
        let display_symbol: Option<String> = row.get("display_symbol")?;

        let price_now_usd: f64 = row.get("price_now_usd")?;
        let price_24h_usd: Option<f64> = row.get("price_24h_usd")?;
        let price_7d_usd: Option<f64> = row.get("price_7d_usd")?;
        let change_24h_usd_bp: Option<i64> = row.get("change_24h_usd_bp")?;
        let change_7d_usd_bp: Option<i64> = row.get("change_7d_usd_bp")?;

        let apy_30d_bp: Option<i64> = row.get("apy_30d_bp")?;

        let score_rank: i64 = row.get("score_rank")?;

        let bcmr = get_token_bcmr(bcmr_conn, &token_id)?;
        let bcmr_well_known = get_well_known_bcmr(bcmr_conn, &token_id)?;

        tokens.push(TokenListItemCached {
            token_id,
            trade_volume,
            tvl_sats,
            tvl_tokens,
            bcmr,
            bcmr_well_known,
            trade_count: 0,
            score,
            score_rank,
            price_now,
            price_24h,
            price_7d,
            change_24h_bp,
            change_7d_bp,
            display_name,
            display_symbol,
            price_now_usd,
            price_24h_usd,
            price_7d_usd,
            change_24h_usd_bp,
            change_7d_usd_bp,
            apy_30d_bp,
        });
    }
    Ok(tokens)
}