use yansi::{Color, Paint};

use crate::config::InstallConfig;

pub fn print_config(conf: &InstallConfig) {
    println!("🚀 Install Configuration:");

    let mut root_info = Tree::new();

    let mut drive_info = Tree::new();
    drive_info.add_str(format!(
        "💾 {} {}",
        conf.drive.boot.paint(Color::Red),
        "[EFI]".paint(Color::Blue)
    ));
    drive_info.add_str(format!(
        "{} {} {}",
        if conf.drive.encryption.is_some() {
            "🔒"
        } else {
            "💾"
        },
        conf.drive.root.paint(Color::Red),
        "[ROOT]".paint(Color::Blue)
    ));

    root_info.add_tree("💾 Drive Selection", drive_info);

    let mut general_info = Tree::new();

    general_info.add_str(format!(
        "💎 {} {}",
        "Mode:".paint(Color::Yellow),
        conf.general.mode
    ));
    general_info.add_str(format!(
        "🖥️ {} {}",
        "Hostname:".paint(Color::Yellow),
        conf.general.hostname
    ));
    general_info.add_str(format!(
        "⌨️ {} {} {}",
        "Keyboard:".paint(Color::Yellow),
        conf.general.keyboard_layout,
        conf.general
            .keyboard_variant
            .as_ref()
            .unwrap_or(&String::new())
    ));
    general_info.add_str(format!(
        "🌍 {} {}",
        "Locale:".paint(Color::Yellow),
        conf.general.locale
    ));
    general_info.add_str(format!(
        "⌛ {} {}",
        "Timezone:".paint(Color::Yellow),
        conf.general.timezone
    ));
    if conf.general.root_password.is_some() {
        general_info.add_str(format!(
            "🔑 {} {}",
            "Root Password".paint(Color::Yellow),
            "✔️".paint(Color::Green)
        ));
    }

    root_info.add_tree("🔨 General", general_info);

    let mut pkg_info = Tree::new();

    if conf.pkg.docker.unwrap_or_default() {
        pkg_info.add_str(format!("🐳 Docker {}", "✔️".paint(Color::Green)));
    }

    if conf.pkg.virtualization.unwrap_or_default() {
        pkg_info.add_str(format!("🎃 Virtualization {}", "✔️".paint(Color::Green)));
    }

    if !conf.pkg.pkg.is_empty() {
        pkg_info.add_str(format!(
            "📦 Additional packages: {}",
            conf.pkg.pkg.join(" ")
        ));
    }

    root_info.add_tree("📦 Packages", pkg_info);

    let mut users_info = Tree::new();

    let empty = Vec::new();
    let user_conf = conf.user.as_ref().unwrap_or(&empty);

    for user in user_conf {
        let mut groups = Vec::new();

        if user.doas_root.unwrap_or_default() {
            groups.push("🔑");
        }

        if user.docker.unwrap_or_default() {
            groups.push("🐋");
        }

        users_info.add_str(format!(
            "👤 {}{}",
            user.name,
            if !groups.is_empty() {
                format!(" [ {} ]", groups.join(" "))
            } else {
                String::new()
            }
        ));
    }

    root_info.add_tree("🧛 Users", users_info);

    if let Some(ssh_conf) = &conf.ssh {
        let mut ssh_info = Tree::new();

        if let Some(sshd_conf) = &ssh_conf.sshd_config {
            ssh_info.add_str(format!("📖 Installing {sshd_conf} as sshd_config"));
        }

        if let Some(keys) = &ssh_conf.key {
            for key in keys {
                let key_origin = key.key.split(" ").nth(2).unwrap_or_default();

                ssh_info.add_str(format!(
                    "🔑 Key {} for {}",
                    key_origin.paint(Color::Blue),
                    key.users.join(", ").paint(Color::Yellow)
                ));
            }
        }

        root_info.add_tree("🌐 SSH", ssh_info);
    }

    if let Some(ai_conf) = &conf.ai {
        let mut ai_info = Tree::new();

        if ai_conf.gpu {
            ai_info.add_str(format!("🟩 Use CUDA {}", "✔️".paint(Color::Green)));
        }

        if let Some(models) = &ai_conf.models {
            ai_info.add_str(format!("⬇️ Pull Models: {}", models.join(", ")));
        }

        root_info.add_tree("🦙 Ollama", ai_info);
    }

    println!("{}", root_info.render(0));
}

pub struct Tree {
    elements: Vec<TreeEntry>,
}

pub enum TreeEntry {
    Tree(String, Tree),
    Str(String),
}

impl Tree {
    pub fn new() -> Self {
        Self { elements: vec![] }
    }

    pub fn add_tree(&mut self, key: &str, item: Tree) {
        self.elements.push(TreeEntry::Tree(key.to_string(), item));
    }

    pub fn add_str(&mut self, item: String) {
        self.elements.push(TreeEntry::Str(item));
    }

    pub fn render(&self, depth: i32) -> String {
        const DEPTH_INCREASE: i32 = 3;

        let mut ret = String::new();

        let len = self.elements.len();

        for (index, val) in self.elements.iter().enumerate() {
            let padding = pad_with_bars(depth, DEPTH_INCREASE);

            let path_repr = if (index + 1) == len {
                if matches!(val, TreeEntry::Tree(_, _)) {
                    "├─"
                } else {
                    "└─"
                }
            } else {
                "├─"
            };

            match val {
                TreeEntry::Tree(key, tree) => {
                    if !tree.elements.is_empty() {
                        ret.push_str(&format!("{padding}{path_repr} {key}\n"));
                        ret.push_str(&tree.render(depth + DEPTH_INCREASE))
                    }
                }
                TreeEntry::Str(str) => {
                    ret.push_str(&format!("{padding}{path_repr} {str}\n"));
                }
            }
        }

        ret
    }
}

pub fn pad_with_bars(n: i32, depth_inc: i32) -> String {
    let amount = n / depth_inc;

    let mut ret = String::new();

    if amount >= 1 {
        ret.push_str("│");
    }

    ret.push_str(&pad(n - amount));
    ret
}

pub fn pad(n: i32) -> String {
    let mut ret = String::new();

    for _ in 0..n {
        ret.push_str(" ");
    }

    ret
}