use serde::Deserialize;
use std::{collections::HashMap, fmt::Debug, path::PathBuf};

mod post;
pub use post::*;

mod misc;
pub use misc::*;

use crate::objectpath::ObjectPath;

pub mod objectpath;

pub static INIT_DB_TOML: &str = include_str!("./config.toml");

fn default_true() -> bool {
	true
}

#[test]
#[expect(clippy::expect_used)]
fn init_db_toml_valid() {
	toml::from_str::<ConfigToml>(INIT_DB_TOML).expect("INIT_DB_TOML should be valid TOML");
}

#[derive(Debug, Clone, Deserialize)]
pub struct ConfigToml {
	pub dataset: DatasetConfig,
	pub schema: HashMap<Label, FieldSpec>,
	pub fts: Option<DatasetFts>,
}

#[derive(Debug, Clone, Deserialize)]
pub struct DatasetConfig {
	/// Must be unique
	pub name: Label,

	/// Root dir for indices
	pub working_dir: Option<PathBuf>,

	/// Where to find this field
	pub source: HashMap<Label, Source>,

	/// How to post-process this field
	#[serde(default)]
	pub post: Vec<FieldSpecPost>,
}

#[derive(Debug, Clone, Deserialize)]
#[serde(tag = "type")]
#[serde(rename_all = "lowercase")]
pub enum Source {
	/// A directory files
	Filesystem {
		/// The directories to scan.
		/// Must be relative.
		#[serde(alias = "paths")]
		path: OneOrMany<PathBuf>,

		/// If true, all toml files are ignored.
		/// Metadata can be added to any file using a {filename}.toml.
		///
		/// If false, toml files are treated as regular files
		/// and sidecar metadata is disabled.
		#[serde(default = "default_true")]
		sidecars: bool,
	},
}

//
// MARK: schema
//

#[derive(Debug, Clone, Deserialize)]
pub struct FieldSpec {
	/// The type of this field
	pub r#type: FieldType,

	/// How to find this field in a data entry
	pub path: OneOrMany<ObjectPath>,

	/// How to post-process this field
	#[serde(default)]
	pub post: Vec<FieldSpecPost>,
}

#[derive(Debug, Clone, Copy, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "lowercase")]
pub enum FieldType {
	Text,
}

//
// MARK: fts
//

#[derive(Debug, Clone, Deserialize, Default)]
pub struct DatasetFts {
	#[serde(alias = "field")]
	pub fields: HashMap<Label, FtsIndexField>,
}

#[derive(Debug, Clone, Deserialize)]
pub struct FtsIndexField {
	pub tokenize: bool,
}