use super::ids::Base62Id;
use super::teams::TeamId;
use super::users::UserId;
use chrono::{DateTime, Utc};
use serde::{Deserialize, Serialize};

/// The ID of a specific mod, encoded as base62 for usage in the API
#[derive(Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[serde(from = "Base62Id")]
#[serde(into = "Base62Id")]
pub struct ModId(pub u64);

/// The ID of a specific version of a mod
#[derive(Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[serde(from = "Base62Id")]
#[serde(into = "Base62Id")]
pub struct VersionId(pub u64);

/// A mod returned from the API
#[derive(Serialize, Deserialize)]
pub struct Mod {
    /// The ID of the mod, encoded as a base62 string.
    pub id: ModId,
    /// The team of people that has ownership of this mod.
    pub team: TeamId,
    /// The title or name of the mod.
    pub title: String,
    /// A short description of the mod.
    pub description: String,
    /// The link to the long description of the mod.
    pub body_url: String,
    /// The date at which the mod was first published.
    pub published: DateTime<Utc>,

    /// The total number of downloads the mod has had.
    pub downloads: u32,
    /// A list of the categories that the mod is in.
    pub categories: Vec<String>,
    /// A list of ids for versions of the mod.
    pub versions: Vec<VersionId>,
    ///The URL of the icon of the mod
    pub icon_url: Option<String>,
    /// An optional link to where to submit bugs or issues with the mod.
    pub issues_url: Option<String>,
    /// An optional link to the source code for the mod.
    pub source_url: Option<String>,
    /// An optional link to the mod's wiki page or other relevant information.
    pub wiki_url: Option<String>,
}

/// A specific version of a mod
#[derive(Serialize, Deserialize)]
pub struct Version {
    /// The ID of the version, encoded as a base62 string.
    pub id: VersionId,
    /// The ID of the mod this version is for.
    pub mod_id: ModId,
    /// The ID of the author who published this version
    pub author_id: UserId,

    /// The name of this version
    pub name: String,
    /// The version number. Ideally will follow semantic versioning
    pub version_number: String,
    /// A link to the changelog for this version of the mod.
    pub changelog_url: Option<String>,
    /// The date that this version was published.
    pub date_published: DateTime<Utc>,
    /// The number of downloads this specific version has had.
    pub downloads: u32,
    /// The type of the release - `Alpha`, `Beta`, or `Release`.
    pub version_type: VersionType,

    /// A list of files available for download for this version.
    pub files: Vec<VersionFile>,
    /// A list of mods that this version depends on.
    pub dependencies: Vec<VersionId>,
    /// A list of versions of Minecraft that this version of the mod supports.
    pub game_versions: Vec<GameVersion>,
    /// The loaders that this version works on
    pub loaders: Vec<ModLoader>,
}

/// A single mod file, with a url for the file and the file's hash
#[derive(Serialize, Deserialize)]
pub struct VersionFile {
    /// A map of hashes of the file.  The key is the hashing algorithm
    /// and the value is the string version of the hash.
    pub hashes: std::collections::HashMap<String, String>,
    /// A direct link to the file for downloading it.
    pub url: String,
    /// The filename of the file.
    pub filename: String,
}

#[derive(Serialize, Deserialize, Clone)]
#[serde(rename_all = "lowercase")]
pub enum VersionType {
    Release,
    Beta,
    Alpha,
}

impl std::fmt::Display for VersionType {
    fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            VersionType::Release => write!(fmt, "release"),
            VersionType::Beta => write!(fmt, "beta"),
            VersionType::Alpha => write!(fmt, "alpha"),
        }
    }
}

/// A specific version of Minecraft
#[derive(Serialize, Deserialize, Clone)]
#[serde(transparent)]
pub struct GameVersion(pub String);

/// A mod loader
#[derive(Serialize, Deserialize, Clone)]
#[serde(transparent)]
pub struct ModLoader(pub String);

// These fields must always succeed parsing; deserialize errors aren't
// processed correctly (don't return JSON errors)
#[derive(Serialize, Deserialize)]
pub struct SearchRequest {
    pub query: Option<String>,
    /// Must match a json 2 deep array of strings `[["categories:misc"]]`
    // TODO: We may want to have a better representation of this, so that
    // we are less likely to break backwards compatability
    pub facets: Option<String>,
    pub filters: Option<String>,
    pub version: Option<String>,
    pub offset: Option<String>,
    pub index: Option<String>,
    pub limit: Option<String>,
}