schematic 0.19.7

use super::template::*;
use crate::schema::{RenderResult, SchemaRenderer};
use indexmap::IndexMap;
use schematic_types::*;

/// Renders Pkl config templates with comments.
pub struct PklTemplateRenderer {
    ctx: TemplateContext,
    schemas: IndexMap<String, Schema>,
}

impl PklTemplateRenderer {
    #[allow(clippy::should_implement_trait)]
    pub fn default() -> Self {
        PklTemplateRenderer::new(TemplateOptions::default())
    }

    pub fn new(mut options: TemplateOptions) -> Self {
        options.comment_prefix = "/// ".into();

        PklTemplateRenderer {
            ctx: TemplateContext::new(options),
            schemas: IndexMap::default(),
        }
    }
}

impl SchemaRenderer<String> for PklTemplateRenderer {
    fn is_reference(&self, _name: &str) -> bool {
        false
    }

    fn render_array(&mut self, array: &ArrayType, _schema: &Schema) -> RenderResult<String> {
        let key = self.ctx.get_stack_key();

        if !self.ctx.is_expanded(&key) {
            return Ok("List()".into());
        }

        self.ctx.depth += 1;

        let item_indent = self.ctx.indent();
        let item = self.render_schema(&array.items_type)?;

        self.ctx.depth -= 1;

        Ok(format!(
            "new Listing {{\n{}{item}\n{}}}",
            item_indent,
            self.ctx.indent()
        ))
    }

    fn render_boolean(&mut self, boolean: &BooleanType, _schema: &Schema) -> RenderResult<String> {
        render_boolean(boolean)
    }

    fn render_enum(&mut self, enu: &EnumType, _schema: &Schema) -> RenderResult<String> {
        render_enum(enu)
    }

    fn render_float(&mut self, float: &FloatType, _schema: &Schema) -> RenderResult<String> {
        render_float(float)
    }

    fn render_integer(&mut self, integer: &IntegerType, _schema: &Schema) -> RenderResult<String> {
        render_integer(integer)
    }

    fn render_literal(&mut self, literal: &LiteralType, _schema: &Schema) -> RenderResult<String> {
        render_literal(literal)
    }

    fn render_null(&mut self, _schema: &Schema) -> RenderResult<String> {
        render_null()
    }

    fn render_object(&mut self, object: &ObjectType, _schema: &Schema) -> RenderResult<String> {
        let key = self.ctx.get_stack_key();

        if !self.ctx.is_expanded(&key) {
            return Ok("Map()".into());
        }

        self.ctx.depth += 1;

        let item_indent = self.ctx.indent();
        let value = self.render_schema(&object.value_type)?;

        self.ctx.depth -= 1;

        let mut key = self.render_schema(&object.key_type)?;

        if key == EMPTY_STRING {
            key = "\"example\"".into();
        }

        Ok(format!(
            "new Mapping {{\n{}[{key}]{}{value}\n{}}}",
            item_indent,
            if object.value_type.is_struct() {
                " "
            } else {
                " = "
            },
            self.ctx.indent()
        ))
    }

    fn render_reference(&mut self, reference: &str, _schema: &Schema) -> RenderResult<String> {
        if let Some(schema) = self.schemas.get(reference) {
            return self.render_schema_without_reference(&schema.to_owned());
        }

        render_reference(reference)
    }

    fn render_string(&mut self, string: &StringType, _schema: &Schema) -> RenderResult<String> {
        render_string(string)
    }

    fn render_struct(&mut self, structure: &StructType, _schema: &Schema) -> RenderResult<String> {
        let mut out = vec![];

        self.ctx.depth += 1;

        for (name, field) in &structure.fields {
            if field.flatten {
                continue;
            }

            self.ctx.push_stack(name);

            if !self.ctx.is_hidden(field) {
                let prop = format!(
                    "{}{}{}",
                    name,
                    if field.schema.is_struct() { " " } else { " = " },
                    self.render_schema(self.ctx.validate_schema_variant(
                        self.ctx.get_stack_value().as_ref(),
                        &field.schema
                    ))?,
                );

                out.push(self.ctx.create_field(field, prop));
            }

            self.ctx.pop_stack();
        }

        self.ctx.depth -= 1;

        if out.is_empty() {
            return Ok("{}".into());
        }

        Ok(format!(
            "{{\n{}\n{}}}",
            out.join(self.ctx.gap()),
            self.ctx.indent()
        ))
    }

    fn render_tuple(&mut self, tuple: &TupleType, _schema: &Schema) -> RenderResult<String> {
        let mut items = vec![];

        for item in &tuple.items_types {
            items.push(self.render_schema(item)?);
        }

        Ok(format!("List({})", items.join(", ")))
    }

    fn render_union(&mut self, uni: &UnionType, _schema: &Schema) -> RenderResult<String> {
        render_union(uni, |schema| self.render_schema(schema))
    }

    fn render_unknown(&mut self, _schema: &Schema) -> RenderResult<String> {
        render_unknown()
    }

    fn render(&mut self, schemas: IndexMap<String, Schema>) -> RenderResult {
        self.schemas = schemas;

        let root = validate_root(&self.schemas)?;
        let mut template = self.render_schema_without_reference(&root)?;

        // Inject the header and footer
        if self.ctx.options.comments {
            template = format!(
                "{}{template}{}",
                self.ctx.options.header, self.ctx.options.footer
            );
        }

        Ok(template)
    }
}