use rocket_contrib::Json;

use db::DbConn;
use db::models::*;

use api::{PasswordData, JsonResult, EmptyResult, JsonUpcase, NumberOrString};
use auth::Headers;
use fast_chemail::is_valid_email;
use mail;

use CONFIG;

#[derive(Deserialize, Debug)]
#[allow(non_snake_case)]
struct RegisterData {
    Email: String,
    Key: String,
    Keys: Option<KeysData>,
    MasterPasswordHash: String,
    MasterPasswordHint: Option<String>,
    Name: Option<String>,
}

#[derive(Deserialize, Debug)]
#[allow(non_snake_case)]
struct KeysData {
    EncryptedPrivateKey: String,
    PublicKey: String,
}

#[post("/accounts/register", data = "<data>")]
fn register(data: JsonUpcase<RegisterData>, conn: DbConn) -> EmptyResult {
    let data: RegisterData = data.into_inner().data;

    if !CONFIG.signups_allowed {
        err!("Signups not allowed")
    }

    if User::find_by_mail(&data.Email, &conn).is_some() {
        err!("Email already exists")
    }

    let mut user = User::new(data.Email, data.Key, data.MasterPasswordHash);

    // Add extra fields if present
    if let Some(name) = data.Name {
        user.name = name;
    }

    if let Some(hint) = data.MasterPasswordHint {
        user.password_hint = Some(hint);
    }

    if let Some(keys) = data.Keys {
        user.private_key = Some(keys.EncryptedPrivateKey);
        user.public_key = Some(keys.PublicKey);
    }

    user.save(&conn);

    Ok(())
}

#[get("/accounts/profile")]
fn profile(headers: Headers, conn: DbConn) -> JsonResult {
    Ok(Json(headers.user.to_json(&conn)))
}

#[derive(Deserialize, Debug)]
#[allow(non_snake_case)]
struct ProfileData {
    #[serde(rename = "Culture")]
    _Culture: String,  // Ignored, always use en-US
    MasterPasswordHint: Option<String>,
    Name: String,
}

#[put("/accounts/profile", data = "<data>")]
fn put_profile(data: JsonUpcase<ProfileData>, headers: Headers, conn: DbConn) -> JsonResult {
    post_profile(data, headers, conn)
}

#[post("/accounts/profile", data = "<data>")]
fn post_profile(data: JsonUpcase<ProfileData>, headers: Headers, conn: DbConn) -> JsonResult {
    let data: ProfileData = data.into_inner().data;

    let mut user = headers.user;

    user.name = data.Name;
    user.password_hint = match data.MasterPasswordHint {
        Some(ref h) if h.is_empty() => None,
        _ => data.MasterPasswordHint,
    };
    user.save(&conn);

    Ok(Json(user.to_json(&conn)))
}

#[get("/users/<uuid>/public-key")]
fn get_public_keys(uuid: String, _headers: Headers, conn: DbConn) -> JsonResult {
    let user = match User::find_by_uuid(&uuid, &conn) {
        Some(user) => user,
        None => err!("User doesn't exist")
    };

    Ok(Json(json!({
        "UserId": user.uuid,
        "PublicKey": user.public_key,
        "Object":"userKey"
    })))
}

#[post("/accounts/keys", data = "<data>")]
fn post_keys(data: JsonUpcase<KeysData>, headers: Headers, conn: DbConn) -> JsonResult {
    let data: KeysData = data.into_inner().data;

    let mut user = headers.user;

    user.private_key = Some(data.EncryptedPrivateKey);
    user.public_key = Some(data.PublicKey);

    user.save(&conn);

    Ok(Json(user.to_json(&conn)))
}

#[derive(Deserialize)]
#[allow(non_snake_case)]
struct ChangePassData {
    MasterPasswordHash: String,
    NewMasterPasswordHash: String,
    Key: String,
}

#[post("/accounts/password", data = "<data>")]
fn post_password(data: JsonUpcase<ChangePassData>, headers: Headers, conn: DbConn) -> EmptyResult {
    let data: ChangePassData = data.into_inner().data;
    let mut user = headers.user;

    if !user.check_valid_password(&data.MasterPasswordHash) {
        err!("Invalid password")
    }

    user.set_password(&data.NewMasterPasswordHash);
    user.key = data.Key;
    user.save(&conn);

    Ok(())
}

#[post("/accounts/security-stamp", data = "<data>")]
fn post_sstamp(data: JsonUpcase<PasswordData>, headers: Headers, conn: DbConn) -> EmptyResult {
    let data: PasswordData = data.into_inner().data;
    let mut user = headers.user;

    if !user.check_valid_password(&data.MasterPasswordHash) {
        err!("Invalid password")
    }

    user.reset_security_stamp();
    user.save(&conn);

    Ok(())
}

#[derive(Deserialize)]
#[allow(non_snake_case)]
struct EmailTokenData {
    MasterPasswordHash: String,
    NewEmail: String,
}

#[post("/accounts/email-token", data = "<data>")]
fn post_email_token(data: JsonUpcase<EmailTokenData>, headers: Headers, conn: DbConn) -> EmptyResult {
    let data: EmailTokenData = data.into_inner().data;

    if !headers.user.check_valid_password(&data.MasterPasswordHash) {
        err!("Invalid password")
    }

    if User::find_by_mail(&data.NewEmail, &conn).is_some() {
        err!("Email already in use");
    }

    Ok(())
}

#[derive(Deserialize)]
#[allow(non_snake_case)]
struct ChangeEmailData {
    MasterPasswordHash: String,
    NewEmail: String,
    
    Key: String,
    NewMasterPasswordHash: String,
    #[serde(rename = "Token")]
    _Token: NumberOrString,
}

#[post("/accounts/email", data = "<data>")]
fn post_email(data: JsonUpcase<ChangeEmailData>, headers: Headers, conn: DbConn) -> EmptyResult {
    let data: ChangeEmailData = data.into_inner().data;
    let mut user = headers.user;

    if !user.check_valid_password(&data.MasterPasswordHash) {
        err!("Invalid password")
    }

    if User::find_by_mail(&data.NewEmail, &conn).is_some() {
        err!("Email already in use");
    }

    user.email = data.NewEmail;
    
    user.set_password(&data.NewMasterPasswordHash);
    user.key = data.Key;

    user.save(&conn);

    Ok(())
}

#[post("/accounts/delete", data = "<data>")]
fn delete_account(data: JsonUpcase<PasswordData>, headers: Headers, conn: DbConn) -> EmptyResult {
    let data: PasswordData = data.into_inner().data;
    let user = headers.user;

    if !user.check_valid_password(&data.MasterPasswordHash) {
        err!("Invalid password")
    }

    // Delete ciphers and their attachments
    for cipher in Cipher::find_owned_by_user(&user.uuid, &conn) {
        if cipher.delete(&conn).is_err() {
            err!("Failed deleting cipher")
        }
    }

    // Delete folders
    for f in Folder::find_by_user(&user.uuid, &conn) {
        if f.delete(&conn).is_err() {
            err!("Failed deleting folder")
        } 
    }

    // Delete devices
    for d in Device::find_by_user(&user.uuid, &conn) { d.delete(&conn); }

    // Delete user
    user.delete(&conn);

    Ok(())
}

#[get("/accounts/revision-date")]
fn revision_date(headers: Headers) -> String {
    let revision_date = headers.user.updated_at.timestamp_millis();
    revision_date.to_string()
}

#[derive(Deserialize)]
#[allow(non_snake_case)]
struct PasswordHintData {
    Email: String,
}

#[post("/accounts/password-hint", data = "<data>")]
fn password_hint(data: JsonUpcase<PasswordHintData>, conn: DbConn) -> EmptyResult {
    let data: PasswordHintData = data.into_inner().data;

    if !is_valid_email(&data.Email) {
        return err!("This email address is not valid...");
    }

    let user = User::find_by_mail(&data.Email, &conn);
    if user.is_none() {
        return Ok(());
    }

    let user = user.unwrap();
    if let Some(ref mail_config) = CONFIG.mail {
        if let Err(e) = mail::send_password_hint(&user.email, user.password_hint, mail_config) {
            err!(format!("There have been a problem sending the email: {}", e));
        }
    } else if CONFIG.show_password_hint {
        if let Some(hint) = user.password_hint {
            err!(format!("Your password hint is: {}", &hint));
        } else {
            err!(format!("Sorry, you have no password hint..."));
        }
    }

    Ok(())
}

#[derive(Deserialize)]
#[allow(non_snake_case)]
struct PreloginData {
    Email: String,
}

#[post("/accounts/prelogin", data = "<data>")]
fn prelogin(data: JsonUpcase<PreloginData>, conn: DbConn) -> JsonResult {
    let data: PreloginData = data.into_inner().data;

    match User::find_by_mail(&data.Email, &conn) {
        Some(user) => {
            let kdf_type = 0; // PBKDF2: 0

            let _server_iter = user.password_iterations;
            let client_iter = 5000; // TODO: Make iterations user configurable

            
            Ok(Json(json!({
                "Kdf": kdf_type,
                "KdfIterations": client_iter
            })))
        },
        None => err!("Invalid user"),
    }
}