//! Self-contained input types for the PSD export.
//!
//! `koharu-app` constructs a `PsdDocument` by walking the scene, resolves its
//! blobs, and hands the result to `export_document`. The PSD crate does not
//! depend on `koharu-core`.

use std::collections::HashMap;

use image::DynamicImage;

/// Content-addressed blob reference used as a key for resolved images.
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct PsdBlobRef(pub String);

impl PsdBlobRef {
    pub fn new(hash: impl Into<String>) -> Self {
        Self(hash.into())
    }
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum PsdTextDirection {
    Horizontal,
    Vertical,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub enum PsdTextAlign {
    #[default]
    Left,
    Center,
    Right,
}

#[derive(Debug, Clone, Copy, Default)]
pub struct PsdShaderEffect {
    pub italic: bool,
    pub bold: bool,
}

#[derive(Debug, Clone)]
pub struct PsdTextStyle {
    pub font_families: Vec<String>,
    pub font_size: Option<f32>,
    pub color: [u8; 4],
    pub effect: Option<PsdShaderEffect>,
    pub text_align: Option<PsdTextAlign>,
}

#[derive(Debug, Clone)]
pub struct PsdNamedFontPrediction {
    pub name: String,
}

#[derive(Debug, Clone, Default)]
pub struct PsdFontPrediction {
    pub named_fonts: Vec<PsdNamedFontPrediction>,
    pub text_color: [u8; 3],
    pub font_size_px: f32,
    pub angle_deg: f32,
}

#[derive(Debug, Clone, Default)]
pub struct PsdTextBlock {
    pub id: String,
    pub x: f32,
    pub y: f32,
    pub width: f32,
    pub height: f32,
    pub translation: Option<String>,
    pub style: Option<PsdTextStyle>,
    pub rendered: Option<PsdBlobRef>,
    pub rotation_deg: Option<f32>,
    pub font_prediction: Option<PsdFontPrediction>,
    pub source_direction: Option<PsdTextDirection>,
    pub rendered_direction: Option<PsdTextDirection>,
    pub detected_font_size_px: Option<f32>,
}

#[derive(Debug, Clone, Default)]
pub struct PsdDocument {
    pub width: u32,
    pub height: u32,
    pub text_blocks: Vec<PsdTextBlock>,
}

/// A document with all blob refs resolved to in-memory images.
pub struct ResolvedDocument<'a> {
    pub document: &'a PsdDocument,
    pub source: &'a DynamicImage,
    pub segment: Option<&'a DynamicImage>,
    pub inpainted: Option<&'a DynamicImage>,
    pub rendered: Option<&'a DynamicImage>,
    pub brush_layer: Option<&'a DynamicImage>,
    /// Resolved pre-rendered text-block images, keyed by `PsdTextBlock.rendered`.
    pub block_images: &'a HashMap<PsdBlobRef, DynamicImage>,
}