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//! Market-Data client implementation

use crate::{errors::MarketResult, indicators::EnhancedMarketSeries, publishers::Publisher};
use chrono::NaiveDate;
use serde::{Deserialize, Serialize};
use std::fmt;
use std::str::FromStr;

/// MarketClient holds the Publisher
pub struct MarketClient<T: Publisher> {
    pub site: T,
}

impl<T: Publisher> MarketClient<T> {
    pub fn new(site: T) -> Self {
        MarketClient { site }
    }

    /// Creates the final query URL for the selected Provider
    pub fn create_endpoint(mut self) -> MarketResult<Self> {
        self.site.create_endpoint()?;
        Ok(self)
    }

    /// Download the data series in the Provider format
    #[cfg(feature = "use-async")]
    pub async fn get_data(mut self) -> MarketResult<Self> {
        self.site.get_data().await?;
        Ok(self)
    }

    /// Download the data series in the Provider format
    #[cfg(feature = "use-sync")]
    pub fn get_data(mut self) -> MarketResult<Self> {
        self.site.get_data()?;
        Ok(self)
    }

    /// Write the downloaded data to anything that implements std::io::Write , like File, TcpStream, Stdout, etc
    pub fn to_writer(&self, writer: impl std::io::Write) -> MarketResult<()> {
        self.site.to_writer(writer)?;
        Ok(())
    }

    /// Transform the downloaded Provider series into MarketSeries format
    pub fn transform_data(&mut self) -> Vec<MarketResult<MarketSeries>> {
        self.site.transform_data()
    }
}

/// Holds the parsed data from Publishers
#[derive(Debug, Serialize, Deserialize)]
pub struct MarketSeries {
    pub symbol: String,
    pub interval: Interval,
    pub data: Vec<Series>,
}

/// Series part of the MarketSeries
#[derive(Debug, Serialize, Deserialize)]
pub struct Series {
    pub date: NaiveDate,
    pub open: f32,
    pub close: f32,
    pub high: f32,
    pub low: f32,
    pub volume: f32,
}

#[derive(Debug, Serialize, Deserialize, Default)]
pub enum Interval {
    Min1,
    Min5,
    Min15,
    Min30,
    Hour1,
    Hour2,
    Hour4,
    #[default]
    Daily,
    Weekly,
    Monthly,
}

impl MarketSeries {
    pub fn enhance_data(self) -> EnhancedMarketSeries {
        EnhancedMarketSeries {
            symbol: self.symbol,
            interval: self.interval,
            series: self.data,
            asks: Vec::new(),
            indicators: Default::default(),
        }
    }
}

impl fmt::Display for MarketSeries {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(
            f,
            "MarketSeries: Symbol = {}, Interval = {}, Series =\n{}",
            self.symbol,
            self.interval,
            self.data
                .iter()
                .map(|series| format!("  {}", series))
                .collect::<Vec<String>>()
                .join("\n")
        )
    }
}

impl fmt::Display for Series {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(
            f,
            "Date: {}, Open: {}, Close: {}, High: {}, Low: {}, Volume: {}",
            self.date, self.open, self.close, self.high, self.low, self.volume
        )
    }
}

impl fmt::Display for Interval {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let interval_str = match self {
            Interval::Min1 => "1 minute",
            Interval::Min5 => "5 minutes",
            Interval::Min15 => "15 minutes",
            Interval::Min30 => "30 minutes",
            Interval::Hour1 => "1 hour",
            Interval::Hour2 => "2 hours",
            Interval::Hour4 => "4 hours",
            Interval::Daily => "Daily",
            Interval::Weekly => "Weekly",
            Interval::Monthly => "Monthly",
        };

        write!(f, "{}", interval_str)
    }
}

/// AlphaVantage response interval: 1min, 5min, 15min, 30min, 60min,
/// Twelvedata response interval: 1min, 5min, 15min, 30min, 1h, 2h, 4h, 1day, 1week, 1month
impl std::str::FromStr for Interval {
    type Err = &'static str;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s.to_lowercase().as_str() {
            "1min" => Ok(Interval::Min1),
            "5min" => Ok(Interval::Min5),
            "15min" => Ok(Interval::Min15),
            "30min" => Ok(Interval::Min30),
            "60min" => Ok(Interval::Hour1),
            "1h" => Ok(Interval::Hour1),
            "2h" => Ok(Interval::Hour2),
            "4h" => Ok(Interval::Hour4),
            "1day" => Ok(Interval::Daily),
            "1week" => Ok(Interval::Weekly),
            "1month" => Ok(Interval::Monthly),
            _ => Err("Invalid interval string"),
        }
    }
}

impl From<String> for Interval {
    fn from(s: String) -> Self {
        Interval::from_str(&s).unwrap_or_else(|_| Interval::Daily)
    }
}