use std::collections::HashMap;
use crate::metadata::Metadata;
use crate::template::{TemplateContext, TemplateValue};

pub struct Post {
    pub metadata: Metadata,
    pub index: u8,
    pub html: String,
    pub raw: String
}

impl Post {
    pub fn to_template_context(posts: &Vec<Post>) -> TemplateContext {
        let mut context = HashMap::new();

        let posts_collection = posts
            .iter()
            .map(|post| post.to_template_value())
            .collect();
        context.insert(
            "has_posts".to_string(),
            TemplateValue::Bool(posts.len() > 0)
        );
        context.insert(
            "posts_length".to_string(),
            TemplateValue::Unsigned(
                posts.len().try_into().unwrap()
            )
        );
        context.insert(
            "posts".to_string(),
            TemplateValue::Collection(posts_collection)
        );

        context
    }
    pub fn to_template_value(&self) -> TemplateContext {
        let mut context = HashMap::new();

        context.insert(
            "id".to_string(),
            TemplateValue::String(format!("{}", self.metadata.id))
        );
        context.insert(
            "created_on".to_string(),
            TemplateValue::Unsigned(self.metadata.created_on)
        );

        if let Some(created_on_utc) = self.metadata.created_on_utc() {
            context.insert(
                "created_on_utc".to_string(),
                TemplateValue::String(created_on_utc)
            );
        }

        context.insert(
            "title".to_string(),
            TemplateValue::String(self.title())
        );
        context.insert(
            "index".to_string(),
            TemplateValue::Unsigned(self.index.into())
        );
        context.insert(
            "html".to_string(),
            TemplateValue::String(format!("{}", self.html))
        );
        context.insert(
            "escaped_html".to_string(),
            TemplateValue::String(format!("{}", self.escaped_html()))
        );
        context.insert(
            "raw".to_string(),
            TemplateValue::String(format!("{}", self.raw))
        );
        context
    }

    fn title(&self) -> String {
        self.raw.trim()
            .split('\n').next().unwrap()
            .replace('#', "")
            .replace("&", "&amp;")
            .trim()
            .to_string()
    }

    fn escaped_html(&self) -> String {
        self.html.replace("&", "&amp;")
            .replace("<", "&lt;")
            .replace(">", "&gt;")
            .replace("\"", "&quot;")
            .replace("'", "&apos;")
    }
}