use std::path::PathBuf;

use clap::{ArgAction, Args, Parser, Subcommand};

use crate::web::TextureKind;

#[derive(Parser, Debug)]
#[command(version, about, long_about = None)]
pub struct Cli {
    #[command(subcommand)]
    pub command: Command,
}

#[derive(Subcommand, Debug)]
pub enum Command {
    /// Build the library and optionally run the webserver.
    Serve(ServeArgs),
    /// Slurp a world directory.
    SlurpWorld(SlurpWorldArgs),
    /// Slurp an Infinity Item Editor realm.
    SlurpRealm(SlurpRealmArgs),
}

#[derive(Debug, Clone, Copy, clap::ValueEnum)]
#[clap(rename_all = "snake_case")]
pub enum MinecraftVersion {
    V1_12,
}

#[derive(Args, Debug)]
pub struct SlurpRealmArgs {
    #[arg(short = 'v', long = "version", default_value = "v1_12")]
    pub version: MinecraftVersion,

    /// The path to the `realm.nbt` file created by Infinity Item Editor.
    #[arg(short = 'r', long = "realm", default_value = "realm.nbt")]
    pub realm_path: PathBuf,

    /// Path to the book container to create or update.
    #[arg(
        short = 'c',
        long = "container",
        default_value = "container.json.gz"
    )]
    pub container_path: PathBuf,
}

#[derive(Args, Debug)]
pub struct SlurpWorldArgs {
    #[arg(short = 'v', long = "version", default_value = "v1_12")]
    pub version: MinecraftVersion,

    /// Path to the world directory.
    #[arg(short = 'w', long = "world")]
    pub world_path: PathBuf,

    /// Number of worker threads used for parallel file slurping.
    /// Defaults to the number of logical CPUs.
    #[arg(short = 'j', long = "workers")]
    pub workers: Option<usize>,

    /// Path to the book container to create or update.
    #[arg(
        short = 'c',
        long = "container",
        default_value = "container.json.gz"
    )]
    pub container_path: PathBuf,
}

#[derive(Args, Debug)]
pub struct ServeArgs {
    /// Whether to warn about empty/whitespace books being skipped during indexing.
    #[arg(short = 'e', long, default_value_t = true, action = ArgAction::Set)]
    pub warn_empty: bool,
    /// Whether to skip indexing books whose plain-text content is empty/whitespace.
    #[arg(short = 'f', long, default_value_t = true, action = ArgAction::Set)]
    pub filter_empty_books: bool,

    /// The score threshold for fuzzy finding book content.
    #[arg(short = 'C', long, default_value_t = 0.78)]
    pub content_threshold: f64,
    /// The score threshold for fuzzy finding book titles.
    #[arg(short = 'T', long, default_value_t = 0.80)]
    pub title_threshold: f64,
    /// The score threshold for fuzzy finding book authors.
    #[arg(short = 'A', long, default_value_t = 0.82)]
    pub author_threshold: f64,

    /// Path to the book container to load.
    #[arg(
        short = 'c',
        long = "container",
        default_value = "container.json.gz"
    )]
    pub container_path: PathBuf,

    #[arg(short = 's', long = "dont-start-webserver", action = ArgAction::SetFalse)]
    pub start_webserver: bool,
    /// Address to bind the webserver to.
    #[arg(
        short = 'a',
        long = "host-address",
        default_value = "127.0.0.1:3000"
    )]
    pub webserver_host_address: String,
    /// Minecraft block/item texture variants to serve by default.
    #[arg(short, long, value_enum, default_value = "modern")]
    pub ui_textures: TextureKind,
}