use std::fmt::Write;

use crate::domain::brews::{BrewWithDetails, QuickNote, format_brew_time};
use crate::domain::formatting::format_weight;
use crate::domain::roasters::Roaster;
use crate::domain::roasts::Roast;

use super::tasting_notes::TastingNoteView;
use super::{
    LegendEntry, build_coffee_info, build_origin_roaster_map, build_roaster_info, format_datetime,
    relative_date,
};

#[derive(Clone)]
pub struct QuickNoteView {
    pub label: String,
    pub pill_class: &'static str,
    pub form_value: String,
}

impl From<QuickNote> for QuickNoteView {
    fn from(note: QuickNote) -> Self {
        Self {
            label: note.label().to_string(),
            pill_class: if note.is_positive() {
                "pill pill-success"
            } else {
                "pill pill-warning"
            },
            form_value: note.form_value().to_string(),
        }
    }
}

#[derive(Clone)]
pub struct BrewView {
    pub id: String,
    pub bag_id: i64,
    pub roast_name: String,
    pub roaster_name: String,
    pub roast_slug: String,
    pub roaster_slug: String,
    pub coffee_weight: String,
    pub grinder_id: i64,
    pub grinder_name: String,
    pub grinder_model: String,
    pub grind_setting: String,
    pub brewer_id: i64,
    pub brewer_name: String,
    pub filter_paper_id: Option<i64>,
    pub filter_paper_name: Option<String>,
    pub water_volume: String,
    pub water_temp: String,
    pub ratio: String,
    pub brew_time: Option<String>,
    pub quick_notes: Vec<QuickNoteView>,
    pub quick_notes_label: String,
    pub quick_notes_raw: String,
    pub created_date: String,
    pub created_time: String,
    pub relative_date_label: String,
    // Raw values for "brew again" feature
    pub coffee_weight_raw: f64,
    pub grind_setting_raw: f64,
    pub water_volume_raw: i32,
    pub water_temp_raw: f64,
    pub brew_time_raw: Option<i32>,
}

impl From<BrewWithDetails> for BrewView {
    fn from(brew: BrewWithDetails) -> Self {
        let ratio = if brew.brew.coffee_weight > 0.0 {
            format!(
                "1:{:.1}",
                f64::from(brew.brew.water_volume) / brew.brew.coffee_weight
            )
        } else {
            "\u{2014}".to_string()
        };

        let quick_notes: Vec<QuickNoteView> = brew
            .brew
            .quick_notes
            .iter()
            .copied()
            .map(QuickNoteView::from)
            .collect();
        let quick_notes_label = quick_notes
            .iter()
            .map(|n| n.label.as_str())
            .collect::<Vec<_>>()
            .join(", ");
        let quick_notes_raw = quick_notes
            .iter()
            .map(|n| n.form_value.as_str())
            .collect::<Vec<_>>()
            .join(",");
        let (created_date, created_time) = format_datetime(brew.brew.created_at);

        Self {
            id: brew.brew.id.to_string(),
            bag_id: brew.brew.bag_id.into_inner(),
            roast_name: brew.roast_name,
            roaster_name: brew.roaster_name,
            roast_slug: brew.roast_slug,
            roaster_slug: brew.roaster_slug,
            coffee_weight: format_weight(brew.brew.coffee_weight),
            grinder_id: brew.brew.grinder_id.into_inner(),
            grinder_model: brew.grinder_model,
            grinder_name: brew.grinder_name,
            grind_setting: format!("{:.1}", brew.brew.grind_setting),
            brewer_id: brew.brew.brewer_id.into_inner(),
            brewer_name: brew.brewer_name,
            filter_paper_id: brew
                .brew
                .filter_paper_id
                .map(crate::domain::ids::GearId::into_inner),
            filter_paper_name: brew.filter_paper_name,
            water_volume: format!("{}ml", brew.brew.water_volume),
            water_temp: format!("{:.1}\u{00B0}C", brew.brew.water_temp),
            ratio,
            brew_time: brew.brew.brew_time.map(format_brew_time),
            quick_notes,
            quick_notes_label,
            quick_notes_raw,
            created_date,
            created_time,
            relative_date_label: relative_date(brew.brew.created_at),
            coffee_weight_raw: brew.brew.coffee_weight,
            grind_setting_raw: brew.brew.grind_setting,
            water_volume_raw: brew.brew.water_volume,
            water_temp_raw: brew.brew.water_temp,
            brew_time_raw: brew.brew.brew_time,
        }
    }
}

impl BrewView {
    /// Build a URL to the add-brew form pre-filled with this brew's parameters.
    pub fn brew_again_url(&self) -> String {
        let mut url = format!(
            "/add?type=brew&bag_id={}&coffee_weight={}&grinder_id={}&grind_setting={}&brewer_id={}&water_volume={}&water_temp={}",
            self.bag_id,
            self.coffee_weight_raw,
            self.grinder_id,
            self.grind_setting_raw,
            self.brewer_id,
            self.water_volume_raw,
            self.water_temp_raw,
        );
        if let Some(fp_id) = self.filter_paper_id {
            let _ = write!(url, "&filter_paper_id={fp_id}");
        }
        if let Some(bt) = self.brew_time_raw {
            let _ = write!(url, "&brew_time={bt}");
        }
        if !self.quick_notes_raw.is_empty() {
            let _ = write!(url, "&quick_notes={}", self.quick_notes_raw);
        }
        url
    }
}

pub struct BrewDefaultsView {
    pub bag_id: String,
    pub grinder_id: String,
    pub grinder_name: String,
    pub brewer_id: String,
    pub brewer_name: String,
    pub filter_paper_id: String,
    pub filter_paper_name: String,
    pub coffee_weight: f64,
    pub grind_setting: f64,
    pub water_volume: i32,
    pub water_temp: f64,
    pub brew_time: Option<i32>,
    /// Comma-separated quick note form values (e.g. "good,too-fast") for pre-filling toggles.
    pub quick_notes_raw: String,
}

impl Default for BrewDefaultsView {
    fn default() -> Self {
        Self {
            bag_id: String::new(),
            grinder_id: String::new(),
            grinder_name: String::new(),
            brewer_id: String::new(),
            brewer_name: String::new(),
            filter_paper_id: String::new(),
            filter_paper_name: String::new(),
            coffee_weight: 15.0,
            grind_setting: 6.0,
            water_volume: 250,
            water_temp: 91.0,
            brew_time: Some(120),
            quick_notes_raw: String::new(),
        }
    }
}

pub struct BrewDetailView {
    pub id: String,
    // Coffee info
    pub roast_name: String,
    pub roaster_name: String,
    pub origin: String,
    pub origin_flag: String,
    pub region: String,
    pub producer: String,
    pub process: String,
    pub tasting_notes: Vec<TastingNoteView>,
    // Roaster info
    pub roaster_country: String,
    pub roaster_country_flag: String,
    pub roaster_city: Option<String>,
    pub roaster_homepage: Option<String>,
    // Recipe
    pub coffee_weight: String,
    pub water_volume: String,
    pub water_temp: String,
    pub grind_setting: String,
    pub brew_time: Option<String>,
    pub quick_notes_label: String,
    // Gear
    pub grinder_name: String,
    pub brewer_name: String,
    pub filter_paper_name: Option<String>,
    // Map
    pub map_countries: String,
    pub map_max: u32,
    pub legend_entries: Vec<LegendEntry>,
    // Slugs (for breadcrumbs)
    pub roaster_slug: String,
    pub roast_slug: String,
    // Dates
    pub created_date: String,
    pub created_time: String,
}

impl BrewDetailView {
    pub fn from_parts(brew: BrewWithDetails, roast: &Roast, roaster: &Roaster) -> Self {
        let coffee = build_coffee_info(roast);
        let roaster_info = build_roaster_info(roaster);

        let (map_countries, map_max, legend_entries) =
            build_origin_roaster_map(roast.origin.as_deref(), &roaster.country);
        let (created_date, created_time) = format_datetime(brew.brew.created_at);

        let quick_notes_label = brew
            .brew
            .quick_notes
            .iter()
            .map(|n| n.label())
            .collect::<Vec<_>>()
            .join(", ");

        Self {
            id: brew.brew.id.to_string(),
            roast_name: brew.roast_name,
            roaster_name: brew.roaster_name,
            roaster_slug: roaster.slug.clone(),
            roast_slug: roast.slug.clone(),
            origin: coffee.origin,
            origin_flag: coffee.origin_flag,
            region: coffee.region,
            producer: coffee.producer,
            process: coffee.process,
            tasting_notes: coffee.tasting_notes,
            roaster_country: roaster_info.country,
            roaster_country_flag: roaster_info.country_flag,
            roaster_city: roaster_info.city,
            roaster_homepage: roaster_info.homepage,
            coffee_weight: format_weight(brew.brew.coffee_weight),
            water_volume: format!("{}ml", brew.brew.water_volume),
            water_temp: format!("{:.1}\u{00B0}C", brew.brew.water_temp),
            grind_setting: format!("{:.1}", brew.brew.grind_setting),
            brew_time: brew.brew.brew_time.map(format_brew_time),
            quick_notes_label,
            grinder_name: brew.grinder_name,
            brewer_name: brew.brewer_name,
            filter_paper_name: brew.filter_paper_name,
            map_countries,
            map_max,
            legend_entries,
            created_date,
            created_time,
        }
    }
}

impl From<BrewWithDetails> for BrewDefaultsView {
    fn from(brew: BrewWithDetails) -> Self {
        Self {
            bag_id: brew.brew.bag_id.to_string(),
            grinder_id: brew.brew.grinder_id.to_string(),
            grinder_name: brew.grinder_name,
            brewer_id: brew.brew.brewer_id.to_string(),
            brewer_name: brew.brewer_name,
            filter_paper_id: brew
                .brew
                .filter_paper_id
                .map(|id| id.to_string())
                .unwrap_or_default(),
            filter_paper_name: brew.filter_paper_name.unwrap_or_default(),
            coffee_weight: brew.brew.coffee_weight,
            grind_setting: brew.brew.grind_setting,
            water_volume: brew.brew.water_volume,
            water_temp: brew.brew.water_temp,
            brew_time: brew.brew.brew_time,
            quick_notes_raw: String::new(),
        }
    }
}