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//! `NcProgBar` & `NcProgBarOptions` methods and associated functions.

use super::{NcProgBar, NcProgBarOptions};
use crate::{c_api, error, NcPlane, NcResult};

/// # `NcProgBarOptions` Methods
impl NcProgBarOptions {
    /// New NcProgBarOptions for [NcProgBar].
    pub fn new() -> Self {
        Self { ulchannel: 0, urchannel: 0, blchannel: 0, brchannel: 0, flags: 0 }
    }
}

/// # `NcProgBar` Methods
impl NcProgBar {
    /// New NcProgBar.
    ///
    /// Takes ownership of the `plane`, which will be destroyed by
    /// [destroy][NcProgBar#method.destroy](). The progress bar is initially at 0%.
    pub fn new<'a>(plane: &mut NcPlane) -> &'a mut Self {
        Self::with_options(plane, &NcProgBarOptions::new())
    }

    /// New NcProgBar. Expects an [NcProgBarOptions] struct.
    ///
    /// *C style function: [ncprogbar_create()][c_api::ncprogbar_create].*
    pub fn with_options<'a>(plane: &mut NcPlane, options: &NcProgBarOptions) -> &'a mut Self {
        unsafe { &mut *c_api::ncprogbar_create(plane, options) }
    }

    /// Destroy the progress bar and its underlying ncplane.
    ///
    /// *C style function: [ncprogbar_destroy()][c_api::ncprogbar_destroy].*
    pub fn destroy(&mut self) {
        unsafe {
            c_api::ncprogbar_destroy(self);
        }
    }

    /// Return a reference to the ncprogbar's underlying ncplane.
    ///
    /// *C style function: [ncprogbar_plane()][c_api::ncprogbar_plane].*
    pub fn plane(&mut self) -> &mut NcPlane {
        unsafe { &mut *c_api::ncprogbar_plane(self) }
    }

    /// Get the progress bar's completion, an [f64] on [0, 1].
    ///
    /// *C style function: [ncprogbar_progress()][c_api::ncprogbar_progress].*
    pub fn progress(&self) -> f64 {
        unsafe { c_api::ncprogbar_progress(self) }
    }

    /// Sets the progress bar's completion, an 0 <= [f64] <= 1.
    ///
    /// Returns [`NCRESULT_ERR`][c_api::NCRESULT_ERR]
    /// if progress is < 0 || > 1.
    ///
    /// *C style function: [ncprogbar_set_progress()][c_api::ncprogbar_set_progress].*
    pub fn set_progress(&mut self, progress: f64) -> NcResult<()> {
        error![unsafe { c_api::ncprogbar_set_progress(self, progress) }]
    }
}