nightshade 0.13.1

use nalgebra_glm::Vec2;

use crate::ecs::ui::state::{STATE_COUNT, UiBase, UiStateTrait};

#[derive(Clone, Debug, PartialEq)]
pub enum AccessibleRole {
    Button,
    Slider,
    Checkbox,
    Toggle,
    TextInput,
    TextArea,
    Dropdown,
    Tab,
    TabPanel,
    Tree,
    TreeItem,
    Grid,
    GridCell,
    Dialog,
    Alert,
    ProgressBar,
    Menu,
    MenuItem,
}

#[derive(Clone, Debug, Default)]
pub struct UiNodeInteraction {
    pub hovered: bool,
    pub pressed: bool,
    pub clicked: bool,
    pub focused: bool,
    pub drag_start: Option<Vec2>,
    pub dragging: bool,
    pub cursor_icon: Option<winit::window::CursorIcon>,
    pub double_clicked: bool,
    pub right_clicked: bool,
    pub tooltip_text: Option<String>,
    pub tooltip_entity: Option<freecs::Entity>,
    pub tab_index: Option<i32>,
    pub disabled: bool,
    pub error_text: Option<String>,
    pub validation_rules: Vec<ValidationRule>,
    pub accessible_role: Option<AccessibleRole>,
    pub accessible_label: Option<String>,
    pub test_id: Option<String>,
}

#[derive(Clone, Copy, Debug)]
pub struct StateTransition {
    pub enter_speed: f32,
    pub exit_speed: f32,
    pub easing: crate::ecs::tween::easing::EasingFunction,
}

impl Default for StateTransition {
    fn default() -> Self {
        Self {
            enter_speed: 10.0,
            exit_speed: 4.0,
            easing: crate::ecs::tween::easing::EasingFunction::Linear,
        }
    }
}

#[derive(Clone, Debug)]
pub struct UiStateWeights {
    pub weights: Vec<f32>,
    pub transitions: Vec<Option<StateTransition>>,
    pub progress: Vec<f32>,
    pub targets: Vec<f32>,
    pub start_weights: Vec<f32>,
}

impl Default for UiStateWeights {
    fn default() -> Self {
        let mut weights = vec![0.0; STATE_COUNT];
        weights[UiBase::INDEX] = 1.0;
        let mut targets = vec![0.0; STATE_COUNT];
        targets[UiBase::INDEX] = 1.0;
        Self {
            weights: weights.clone(),
            transitions: vec![None; STATE_COUNT],
            progress: vec![1.0; STATE_COUNT],
            targets,
            start_weights: weights,
        }
    }
}

impl UiStateWeights {
    pub fn ensure_state_capacity(&mut self, count: usize) {
        if self.weights.len() < count {
            self.weights.resize(count, 0.0);
        }
        if self.transitions.len() < count {
            self.transitions.resize(count, None);
        }
        if self.progress.len() < count {
            self.progress.resize(count, 1.0);
        }
        if self.targets.len() < count {
            self.targets.resize(count, 0.0);
        }
        if self.start_weights.len() < count {
            self.start_weights.resize(count, 0.0);
        }
    }
}

#[derive(Clone)]
pub enum ValidationRule {
    Required,
    MinLength(usize),
    MaxLength(usize),
    Custom(fn(&str) -> Result<(), String>),
}

impl std::fmt::Debug for ValidationRule {
    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::Required => write!(formatter, "Required"),
            Self::MinLength(n) => write!(formatter, "MinLength({})", n),
            Self::MaxLength(n) => write!(formatter, "MaxLength({})", n),
            Self::Custom(_) => write!(formatter, "Custom(fn)"),
        }
    }
}

impl ValidationRule {
    pub fn validate(&self, value: &str) -> Result<(), String> {
        match self {
            Self::Required => {
                if value.trim().is_empty() {
                    Err("This field is required".to_string())
                } else {
                    Ok(())
                }
            }
            Self::MinLength(min) => {
                if value.chars().count() < *min {
                    Err(format!("Minimum {} characters required", min))
                } else {
                    Ok(())
                }
            }
            Self::MaxLength(max) => {
                if value.chars().count() > *max {
                    Err(format!("Maximum {} characters allowed", max))
                } else {
                    Ok(())
                }
            }
            Self::Custom(validator) => validator(value),
        }
    }
}