use serde::{Deserialize, Serialize};
use std::path::{Path, PathBuf};

use crate::error::{Result, WebBuilderError};

/// Site configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SiteConfig {
    /// Site name
    pub name: String,

    /// Site title
    pub title: String,

    /// Site description
    pub description: Option<String>,

    /// Site keywords
    pub keywords: Option<Vec<String>>,

    /// Site URL
    pub url: Option<String>,

    /// Site favicon
    pub favicon: Option<String>,

    /// Site header
    pub header: Option<HeaderConfig>,

    /// Site footer
    pub footer: Option<FooterConfig>,

    /// Site collections
    pub collections: Vec<CollectionConfig>,

    /// Site pages
    pub pages: Vec<PageConfig>,

    /// Base path of the site configuration
    #[serde(skip)]
    pub base_path: PathBuf,
}

/// Header configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct HeaderConfig {
    /// Header logo
    pub logo: Option<LogoConfig>,

    /// Header title
    pub title: Option<String>,

    /// Header menu
    pub menu: Option<Vec<MenuItemConfig>>,

    /// Login button
    pub login: Option<LoginConfig>,
}

/// Logo configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct LogoConfig {
    /// Logo source
    pub src: String,

    /// Logo alt text
    pub alt: Option<String>,
}

/// Menu item configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MenuItemConfig {
    /// Menu item label
    pub label: String,

    /// Menu item link
    pub link: String,

    /// Menu item children
    pub children: Option<Vec<MenuItemConfig>>,
}

/// Login button configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct LoginConfig {
    /// Whether the login button is visible
    pub visible: bool,

    /// Login button label
    pub label: Option<String>,

    /// Login button link
    pub link: Option<String>,
}

/// Footer configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct FooterConfig {
    /// Footer title
    pub title: Option<String>,

    /// Footer sections
    pub sections: Option<Vec<FooterSectionConfig>>,

    /// Footer copyright
    pub copyright: Option<String>,
}

/// Footer section configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct FooterSectionConfig {
    /// Section title
    pub title: String,

    /// Section links
    pub links: Vec<LinkConfig>,
}

/// Link configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct LinkConfig {
    /// Link label
    pub label: String,

    /// Link URL
    pub href: String,
}

/// Collection configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CollectionConfig {
    /// Collection name
    pub name: Option<String>,

    /// Collection URL
    pub url: Option<String>,

    /// Collection description
    pub description: Option<String>,

    /// Whether to scan the URL for collections
    pub scan: Option<bool>,
}

/// Page configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct PageConfig {
    /// Page name
    pub name: String,

    /// Page title
    pub title: String,

    /// Page description
    pub description: Option<String>,

    /// Page navigation path
    pub navpath: String,

    /// Page collection
    pub collection: String,

    /// Whether the page is a draft
    pub draft: Option<bool>,
}

impl SiteConfig {
    /// Load site configuration from a directory
    ///
    /// # Arguments
    ///
    /// * `path` - Path to the directory containing hjson configuration files
    ///
    /// # Returns
    ///
    /// A new SiteConfig instance or an error
    pub fn from_directory<P: AsRef<Path>>(path: P) -> Result<Self> {
        let path = path.as_ref();

        // Check if the directory exists
        if !path.exists() {
            return Err(WebBuilderError::MissingDirectory(path.to_path_buf()));
        }

        // Check if the directory is a directory
        if !path.is_dir() {
            return Err(WebBuilderError::InvalidConfiguration(format!(
                "{:?} is not a directory",
                path
            )));
        }

        // TODO: Implement loading configuration from hjson files

        // For now, return a placeholder configuration
        Ok(SiteConfig {
            name: "demo1".to_string(),
            title: "Demo Site 1".to_string(),
            description: Some("This is a demo site for doctree".to_string()),
            keywords: Some(vec![
                "demo".to_string(),
                "doctree".to_string(),
                "example".to_string(),
            ]),
            url: Some("https://example.com".to_string()),
            favicon: Some("img/favicon.png".to_string()),
            header: None,
            footer: None,
            collections: Vec::new(),
            pages: Vec::new(),
            base_path: path.to_path_buf(),
        })
    }
}