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 Data {
    fn page_title() -> String {
        String::from("Home")
    }

    fn alternative_htmlfilename() -> Option<String> {
        Some(String::from("index"))
    }

    fn render_content(&self) -> Markup {
        let last_story = self.stories.first();
        html!(
            @if let Some(story) = last_story {
                div class="latest-story" {
                    h2 { "Latest Story" }
                    h3 {
                        (story.name)
                    }
                    p { (story.description) }
                    ul {
                        li { "Language: " (story.language) }
                        li {
                            a href=(&story.format_pdf_path()) download
                            {
                                "PDF"
                            }
                        }
                    }

                }
            }
        )
    }

    fn content_style() -> Markup {
        html!(
        """
            h2 {
                font-size: 2.5rem;
                color: #2F3C57;
                text-decoration: 0.1rem solid underline black;
            }

            h3 {
                font-size: 1.8rem;
                color: #2F3C57;
                padding: 2rem 0;
            }

            .latest-story {
                padding: 3rem;
                margin: 3rem;
                text-align: left;
                background-color: #FFD1A3;
                * {
                    margin: 1rem 0;
                }

                p {
                    font-size: 1.2rem;
                }
            }

            a {
                text-decoration: underline;
                color: #3D1D49;
            }

            ul {
                list-style: none;
            }

        """
        )
    }
}

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(&mut self) -> Result<()> {
        self.sort_by(|a, b| {
            let date1 = a.update_date.unwrap_or(a.upload_date);
            let date2 = b.update_date.unwrap_or(b.upload_date);
            date2.cmp(&date1)
        });
        for story in self {
            std::fs::copy(&story.path, story.format_local_pdf_path())?;
        }
        Ok(())
    }

    fn content_style() -> Markup {
        html!(
        """
h2 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: #2F3C57;
}

hr {
    margin: 1rem;
}


.story-card {
        text-align: left;
        font-size: 1.2rem;
        ul {
            display: flex;
            justify-content: start;
            list-style: none;
            flex-wrap: wrap;
            
            li {
                font-size: 1rem;
                padding: 0.8rem;
                margin: 0.8rem;
                background-color: #2F3C57;
                color: #ffd1a3;
                outline: 0.2rem solid #2F3C57;
                
                a {
                    text-decoration: underline #E1CCEB;
                    color: #E1CCEB;
                }
            }
        }

        hr {
            margin: 2rem 0;
        }
        padding: 3rem;
        margin: 3rem;
        background-color: #ffd1a3;
        border-bottom: 0.1rem dotted black;
    }
        """
        )
    }
}

#[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 mut data: Data = toml::from_str(&data_file_content)?;
    data.stories.write_page()?;
    data.write_page()?;
    Ok(())
}