/*
 * Copyright (C) 2022  Aravinth Manivannan <realaravinth@batsense.net>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
use std::collections::HashMap;

use actix_web::{web, HttpResponse, Responder};
use serde::{Deserialize, Serialize};

use crate::db::FormSubmission;
use crate::errors::*;
use crate::AppCtx;
use crate::*;

pub mod routes {
    use super::*;
    #[derive(Debug, Eq, PartialEq, Deserialize, Serialize)]
    pub struct Forms {
        pub submit: &'static str,
        pub get_all: &'static str,
    }
    impl Forms {
        pub const fn new() -> Self {
            Self {
                submit: "/api/v1/forms/submit",
                get_all: "/api/v1/forms/list",
            }
        }

        pub fn get_submit(&self, host: &str, path: &str) -> String {
            format!("{}?host={}&path={}", self.submit, host, path)
        }
    }
}

pub fn services(cfg: &mut web::ServiceConfig) {
    cfg.service(upload);
    cfg.service(list_all);
}

#[derive(Deserialize, Serialize, Debug)]
#[serde(untagged)]
enum FormDType {
    Num(f64),
    Str(String),
}

impl FormDType {
    fn apply_types(&mut self) {
        if let Self::Str(data) = self {
            if let Ok(num) = data.parse::<f64>() {
                *self = Self::Num(num);
            }
        }
    }
}

pub type FormValue = HashMap<String, FormDType>;

#[derive(Serialize, Deserialize, Clone, Debug)]
struct Page {
    page: usize,
}

#[derive(Serialize, Deserialize, Clone, Debug)]
pub struct Table {
    pub host: String,
    pub path: String,
}

#[derive(Serialize, Deserialize, Clone, Debug, Default)]
pub struct FormSubmissionResp {
    pub value: Option<serde_json::Value>,
    pub time: i64,
}

impl From<FormSubmission> for FormSubmissionResp {
    fn from(f: FormSubmission) -> Self {
        Self {
            value: f.value,
            time: f.time.unix_timestamp(),
        }
    }
}

#[actix_web_codegen_const_routes::post(path = "API_V1_ROUTES.forms.get_all")]
async fn list_all(
    ctx: AppCtx,
    payload: web::Json<Table>,
    page: web::Query<Page>,
) -> ServiceResult<impl Responder> {
    let mut subs = ctx
        .db
        .get_form_submissions(page.page, &payload.host, &payload.path)
        .await?;
    let mut resp: Vec<FormSubmissionResp> = Vec::with_capacity(subs.len());
    for sub in subs.drain(0..) {
        resp.push(sub.into());
    }

    Ok(HttpResponse::Ok().json(resp))
}

#[actix_web_codegen_const_routes::post(path = "API_V1_ROUTES.forms.submit")]
async fn upload(
    ctx: AppCtx,
    query: web::Query<Table>,
    payload: web::Either<web::Json<serde_json::Value>, web::Form<FormValue>>,
) -> ServiceResult<impl Responder> {
    let host = &query.host;
    let path = &query.path;

    let data = match payload {
        web::Either::Left(json) => json.into_inner(),
        web::Either::Right(form) => {
            let mut form = form.into_inner();
            for (_, v) in form.iter_mut() {
                v.apply_types();
            }
            serde_json::to_value(&form).unwrap()
        }
    };

    ctx.db
        .add_form_submission(&data, &host, path)
        .await
        .unwrap();

    Ok(HttpResponse::Ok().json(data))
}

#[cfg(test)]
pub mod tests {
    use actix_web::{
        http::{header, StatusCode},
        test, App,
    };

    use super::*;

    #[derive(Serialize, Clone, Debug, Deserialize, PartialEq)]
    struct Foo {
        foo: String,
        num: f64,
    }

    #[actix_rt::test]
    async fn submit_works() {
        //        const USERNAME: &str = "index_works";
        //        const PASSWORD: &str = "23k4j;123k4j1;l23kj4";
        let settings = Settings::new().unwrap();
        //        let settings = Settings::new().unwrap();
        let ctx = AppCtx::new(crate::ctx::Ctx::new(&settings).await);
        let app = test::init_service(
            App::new()
                .app_data(ctx.clone())
                .configure(crate::routes::services),
        )
        .await;

        let host = "localhost:8008";
        let path = "/foo";
        let upload_path = API_V1_ROUTES.forms.get_submit(host, path);
        println!("{upload_path}");

        let foo = Foo {
            foo: "Foo".into(),
            num: 2.33,
        };

        // upload json
        let upload_json = test::call_service(
            &app,
            test::TestRequest::post()
                .uri(&upload_path)
                .set_json(&foo)
                .to_request(),
        )
        .await;
        if upload_json.status() != StatusCode::OK {
            let resp_err: crate::errors::ErrorToResponse = test::read_body_json(upload_json).await;
            panic!("{:?}", resp_err.error);
        }

        assert_eq!(upload_json.status(), StatusCode::OK);
        let json: serde_json::Value = test::read_body_json(upload_json).await;

        // upload url encoded
        let upload_form = test::call_service(
            &app,
            test::TestRequest::post()
                .uri(&upload_path)
                .set_form(&foo)
                .to_request(),
        )
        .await;
        if upload_form.status() != StatusCode::OK {
            let resp_err: crate::errors::ErrorToResponse = test::read_body_json(upload_form).await;
            panic!("{:?}", resp_err.error);
        }

        assert_eq!(upload_form.status(), StatusCode::OK);
        let form: serde_json::Value = test::read_body_json(upload_form).await;
        assert_eq!(form, json);

        let get_sub_route = format!("{}?page={}", API_V1_ROUTES.forms.get_all, 0);
        let payload = Table {
            host: host.into(),
            path: path.to_owned(),
        };
        println!("{get_sub_route}");
        let get_subs = test::call_service(
            &app,
            test::TestRequest::post()
                .set_json(&payload)
                .uri(&get_sub_route)
                .to_request(),
        )
        .await;
        println!("{:?}", get_subs);
        assert_eq!(get_subs.status(), StatusCode::OK);
        let subs: Vec<FormSubmissionResp> = test::read_body_json(get_subs).await;
        let foo_as_json_value = serde_json::to_value(&foo).unwrap();
        assert_eq!(subs.len(), 2);
        assert_eq!(subs[0].value.as_ref().unwrap(), &foo_as_json_value);
        assert_eq!(subs[1].value.as_ref().unwrap(), &foo_as_json_value);
    }
}