use toml;

use std::path::PathBuf;
use std::fs::File;
use std::io::Read;
use std::error::Error as STDError;
use std::collections::HashMap;

use logger::LogLevel;
use error::Error;

#[derive(Deserialize, Serialize, Clone, Debug)]
pub struct GlobalConfigToml {
    pub website: WebsiteConfig,
    pub navbar: Option<NavbarConfig>,
    #[serde(rename = "resource")]
    pub resources: Option<HashMap<String, ResourceConfig>>,
    pub twitter: Option<TwitterConfig>,
    pub google: Option<GoogleConfig>,
}

#[derive(Deserialize, Serialize, Clone, Debug)]
pub struct ResourceConfig {
    pub source: String,
    pub destination: String,
}

#[derive(Deserialize, Serialize, Clone, Debug)]
pub struct WebsiteConfig {
    pub website_name: String,
    pub built_pages: Vec<String>,
    pub use_default_css: bool,
    pub use_default_js: bool,
    pub javascript: Vec<String>,
    pub css: Vec<String>,

    pub favicon: Option<String>,
    pub before_navbar_url: Option<String>,
    pub before_content_url: Option<String>,
    pub after_content_url: Option<String>,

    pub mobile_viewport: Option<bool>,
    pub meta_description: Option<bool>,
    pub charset: Option<String>,
    pub meta_og: Option<bool>,

    pub output: Option<String>,
}

#[derive(Deserialize, Serialize, Clone, Debug)]
pub struct GoogleConfig {
    pub google_robots: String,
    pub google_site_verification: String,
}

#[derive(Deserialize, Serialize, Clone, Debug)]
pub struct TwitterConfig {
    pub twitter_site: String,
    pub twitter_creator: String,
}

#[derive(Deserialize, Serialize, Clone, Debug)]
pub struct NavbarConfig {
    pub items: Vec<String>,
    #[serde(rename = "item")]
    pub item_map: HashMap<String, NavbarItem>,
}

#[derive(Deserialize, Serialize, Clone, Debug)]
pub struct NavbarItem {
    pub title: String,
    pub link: String,
    pub image_url: Option<String>,
}

impl GlobalConfigToml {
    pub fn get_config() -> Result<GlobalConfigToml, Error> {
        let mut file = File::open("config.toml")?;
        let mut contents = String::new();
        file.read_to_string(&mut contents)?;
        match toml::from_str(&contents) {
            Ok(config) => Ok(config),
            Err(err) => {
                if let Some((line, col)) = err.line_col() {
                    Err(Error::new(
                        LogLevel::SEVERE,
                        format!("Erronous config.toml at {}:{}", line, col),
                    ))
                } else {
                    Err(Error::new(
                        LogLevel::SEVERE,
                        format!("Failed to parse config.toml correctly. Check variable names!"),
                    ))
                }
            }
        }
    }
}

#[derive(Deserialize, Serialize, Clone, Debug)]
pub struct PageConfigToml {
    pub page: PageConfig,
}

impl PageConfigToml {
    pub fn get_from(path: &PathBuf) -> Result<PageConfigToml, Error> {
        let path_str = match path.to_str() {
            Some(path_str) => path_str,
            None => "",
        };

        let mut file = match File::open(path.as_path()) {
            Ok(file) => file,
            Err(err) => {
                return Err(Error::new(
                    LogLevel::SEVERE,
                    format!(
                        "Failed to open page config: {}, Reason: {}",
                        path.to_str().unwrap(),
                        err.description().to_owned()
                    ),
                ))
            }
        };
        let mut contents = String::new();
        file.read_to_string(&mut contents)?;
        match toml::from_str(&contents) {
            Ok(config) => Ok(config),
            Err(err) => {
                if let Some((line, col)) = err.line_col() {
                    Err(Error::new(
                        LogLevel::SEVERE,
                        format!("Erronous toml: {} at {}:{}", path_str, line, col),
                    ))
                } else {
                    Err(Error::new(
                        LogLevel::SEVERE,
                        format!(
                            "Failed to parse toml correctly: {}. Check variable names!",
                            path_str
                        ),
                    ))
                }
            }
        }
    }
}

#[derive(Deserialize, Serialize, Clone, Debug)]
pub struct PageConfig {
    pub html_path: String,
    pub title: String,
    pub description: String,
    pub content_path: String,
    pub favicon: Option<String>,
    pub before_navbar_url: Option<String>,
    pub before_content_url: Option<String>,
    pub after_content_url: Option<String>,
    pub javascript: Option<Vec<String>>,
    pub css: Option<Vec<String>>,
}