use nih_plug::prelude::*;
use nih_plug_egui::EguiState;
use patina_core::{Focus, Settings};
use std::sync::Arc;
#[derive(Params)]
pub struct FocusParams {
    #[id = "enabled"]
    pub enabled: FloatParam,
    #[id = "frequency"]
    pub frequency: FloatParam,
    #[id = "width"]
    pub width: FloatParam,
    #[id = "sensitivity"]
    pub sensitivity: FloatParam,
}
fn linear(name: &str, v: f32, min: f32, max: f32, unit: &'static str) -> FloatParam {
    FloatParam::new(name, v, FloatRange::Linear { min, max }).with_unit(unit)
}
fn log(name: &str, v: f32, min: f32, max: f32, unit: &'static str) -> FloatParam {
    FloatParam::new(
        name,
        v,
        FloatRange::Skewed {
            min,
            max,
            factor: FloatRange::skew_factor(-2.),
        },
    )
    .with_unit(unit)
}
impl Default for FocusParams {
    fn default() -> Self {
        Self {
            enabled: linear("Enabled", 0., 0., 1., "").with_step_size(1.),
            frequency: log("Frequency", 2000., 20., 20000., " Hz"),
            width: linear("Width", 0.5, 0.05, 2., " oct"),
            sensitivity: linear("Sensitivity", 0., -18., 18., " dB"),
        }
    }
}
#[derive(Params)]
pub struct PatinaParams {
    #[persist = "editor"]
    pub editor: Arc<EguiState>,
    #[id = "depth"]
    pub depth: FloatParam,
    #[id = "sharpness"]
    pub sharpness: FloatParam,
    #[id = "selectivity"]
    pub selectivity: FloatParam,
    #[id = "attack"]
    pub attack: FloatParam,
    #[id = "release"]
    pub release: FloatParam,
    #[id = "transient-guard"]
    pub transient_guard: FloatParam,
    #[id = "low"]
    pub low: FloatParam,
    #[id = "high"]
    pub high: FloatParam,
    #[id = "mix"]
    pub mix: FloatParam,
    #[id = "output"]
    pub output: FloatParam,
    #[id = "tone-guard"]
    pub tone_guard: FloatParam,
    #[id = "bypass"]
    pub bypass: BoolParam,
    #[nested(array, group = "Focus")]
    pub focus: [FocusParams; 4],
}
impl Default for PatinaParams {
    fn default() -> Self {
        let d = Settings::default();
        Self {
            editor: EguiState::from_size(1180, 760),
            depth: linear("Depth", d.depth, 0., 20., " dB"),
            sharpness: linear("Sharpness", d.sharpness, 0., 100., " %"),
            selectivity: linear("Selectivity", d.selectivity, 0., 100., " %"),
            attack: log("Attack", d.attack, 1., 200., " ms"),
            release: log("Release", d.release, 10., 1000., " ms"),
            transient_guard: linear("Transient guard", d.transient_guard, 0., 100., " %"),
            low: log("Low frequency", d.low, 20., 19999., " Hz"),
            high: log("High frequency", d.high, 21., 20000., " Hz"),
            mix: linear("Mix", 100., 0., 100., " %"),
            output: linear("Output", 0., -12., 12., " dB"),
            tone_guard: linear("Tone guard", d.tone_guard, 0., 100., " %"),
            bypass: BoolParam::new("Bypass", false).make_bypass(),
            focus: std::array::from_fn(|_| FocusParams::default()),
        }
    }
}
impl PatinaParams {
    pub fn floats(&self) -> [&FloatParam; COUNT] {
        [
            &self.depth,
            &self.sharpness,
            &self.selectivity,
            &self.attack,
            &self.release,
            &self.transient_guard,
            &self.low,
            &self.high,
            &self.mix,
            &self.output,
            &self.focus[0].enabled,
            &self.focus[0].frequency,
            &self.focus[0].width,
            &self.focus[0].sensitivity,
            &self.focus[1].enabled,
            &self.focus[1].frequency,
            &self.focus[1].width,
            &self.focus[1].sensitivity,
            &self.focus[2].enabled,
            &self.focus[2].frequency,
            &self.focus[2].width,
            &self.focus[2].sensitivity,
            &self.focus[3].enabled,
            &self.focus[3].frequency,
            &self.focus[3].width,
            &self.focus[3].sensitivity,
            &self.tone_guard,
        ]
    }
    pub fn settings(&self) -> Settings {
        let mut s = Settings {
            depth: self.depth.value(),
            sharpness: self.sharpness.value(),
            selectivity: self.selectivity.value(),
            attack: self.attack.value(),
            release: self.release.value(),
            transient_guard: self.transient_guard.value(),
            low: self.low.value(),
            high: self.high.value(),
            mix: self.mix.value(),
            output: self.output.value(),
            bypass: self.bypass.value(),
            focus: std::array::from_fn(|i| Focus {
                enabled: self.focus[i].enabled.value() >= 0.5,
                frequency: self.focus[i].frequency.value(),
                width: self.focus[i].width.value(),
                sensitivity: self.focus[i].sensitivity.value(),
            }),
            tone_guard: self.tone_guard.value(),
        };
        // Independent automation of bounds may cross them; preserve a valid effective range.
        if s.low >= s.high {
            s.low = (s.high - 1.).max(20.);
        }
        s
    }
}
/// Host float parameters: ten main controls, four per focus point, then Tone guard.
pub const COUNT: usize = 27;
pub fn values(s: &Settings) -> [f32; COUNT] {
    let mut v = [0.; COUNT];
    v[..10].copy_from_slice(&[
        s.depth,
        s.sharpness,
        s.selectivity,
        s.attack,
        s.release,
        s.transient_guard,
        s.low,
        s.high,
        s.mix,
        s.output,
    ]);
    for i in 0..4 {
        v[10 + i * 4..14 + i * 4].copy_from_slice(&[
            f32::from(s.focus[i].enabled),
            s.focus[i].frequency,
            s.focus[i].width,
            s.focus[i].sensitivity,
        ]);
    }
    v[26] = s.tone_guard;
    v
}