use crate::metadata::Metadata;
use crate::template::{Context, Value};
use std::collections::HashMap;

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

impl Post {
    pub fn to_template_context(posts: &[Post]) -> Context {
        let mut context = HashMap::new();

        let posts_collection = posts.iter().map(Post::to_template_value).collect();
        context.insert("has_posts".to_string(), Value::Bool(!posts.is_empty()));
        context.insert(
            "posts_length".to_string(),
            Value::Unsigned(posts.len().try_into().unwrap()),
        );
        context.insert("posts".to_string(), Value::Collection(posts_collection));

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

        context.insert(
            "id".to_string(),
            Value::String(self.metadata.id.to_string()),
        );
        context.insert(
            "created_on".to_string(),
            Value::Unsigned(self.metadata.created_on),
        );

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

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

    fn title(&self) -> String {
        self.raw
            .lines()
            .next()
            .unwrap()
            .replace('#', "")
            .replace('&', "&")
            .trim()
            .to_string()
    }

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