use anyhow::{Context, Result};
use maud::{html, Markup};
use serde::Deserialize;
use toml::value::Date;

use self::page::Page;

mod page;

#[derive(Deserialize)]
struct Data {
    stories: Vec<Story>,
}

impl page::Page for Vec<Story> {
    fn page_title() -> String {
        String::from("Stories")
    }

    fn render_content(self) -> Markup {
        html!(
            @for story in self {
                (story.render_as_card())
            }
        )
    }

    fn prepare_content(&self) -> Result<()> {
        for story in self {
            std::fs::copy(&story.path, story.format_local_pdf_path())?;
        }
        Ok(())
    }
}

#[derive(Deserialize, Debug)]
enum StoryLanguage {
    German,
    English,
}

impl std::fmt::Display for StoryLanguage {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{:?}", self)
    }
}

#[derive(Deserialize)]
struct Story {
    name: String,
    description: String,
    language: StoryLanguage,
    upload_date: Date,
    update_date: Option<Date>,
    path: String,
}

impl Story {
    fn render_as_card(self) -> Markup {
        html!(div class="story-card" {
            card {
                h2 { (self.name) }
                p { (self.description) }
                hr {}
                ul {
                    li { "Language: " (self.language) }
                    li { "Uploaded on: " (self.upload_date) }
                    @if let Some(update_date) = self.update_date {
                        li { "Updated on: " (update_date) }
                    }
                    li {
                        a href=(&self.format_pdf_path()) download
                        {
                            "PDF"
                        }
                    }
                }
            }
        })
    }

    fn format_pdf_path(&self) -> String {
        let snake_case_name = self.name.to_lowercase().replace(" ", "_");
        format!("stories/{}.pdf", snake_case_name)
    }

    fn format_local_pdf_path(&self) -> String {
        format!("dist/{}", self.format_pdf_path())
    }
}

fn main() -> Result<()> {
    let data_file_content =
        std::fs::read_to_string("data.toml").with_context(|| "Failed to read data.toml")?;
    let data: Data = toml::from_str(&data_file_content)?;
    data.stories.write_page()?;
    Ok(())
}