objectiveai-sdk 2.0.8

use rand::Rng;
use rand::seq::SliceRandom;

use crate::agent::completions::message::{InputAudio, RichContentPart};
use crate::functions::expression::{AudioInputSchema, InputValue};

pub const fn permutations(_schema: &AudioInputSchema) -> usize {
    2usize
}

pub fn generate<R: Rng>(_schema: &AudioInputSchema, mut rng: R) -> Generator<R> {
    let mut indices: Vec<usize> = (0..2).collect();
    indices.shuffle(&mut rng);
    Generator {
        indices,
        pos: 0,
        rng,
    }
}

pub struct Generator<R: Rng> {
    indices: Vec<usize>,
    pos: usize,
    rng: R,
}

impl<R: Rng> Iterator for Generator<R> {
    type Item = InputValue;
    fn next(&mut self) -> Option<InputValue> {
        if self.pos >= self.indices.len() {
            self.indices.shuffle(&mut self.rng);
            self.pos = 0;
        }
        let index = self.indices[self.pos];
        self.pos += 1;
        Some(InputValue::RichContentPart(RichContentPart::InputAudio {
            input_audio: InputAudio {
                data: super::string::random_string(&mut self.rng),
                format: if index == 0 {
                    "wav".to_string()
                } else {
                    "mp3".to_string()
                },
            },
        }))
    }
}