use std::{error::Error, sync::Arc};

use axum::http;
use axum_test::TestServer;
use common::web_api;
use cookie::Cookie;
use scraper::{ElementRef, Html, Selector};
use serde::Serialize;
use sscanf::sscanf;

use recipes::{app, email};

mod utils;

#[tokio::test]
async fn homepage() -> Result<(), Box<dyn Error>> {
    // Arrange.
    let state = utils::common_state().await?;
    let user_id =
        utils::create_user(&state.db_connection, "president@spaceball.planet", "12345").await?;
    let _recipe_id = utils::create_recipe(&state.db_connection, user_id, "spaghetti").await?;
    let server = TestServer::new(app::make_service(state))?;

    // Act.
    let response = server.get("/").await;

    // Assert.
    response.assert_status_ok();

    let document = Html::parse_document(&response.text());
    if !document.errors.is_empty() {
        panic!("{:?}", document.errors);
    }

    let first_recipe_title =
        Selector::parse("#recipes-list .recipes-list-public .recipe-item").unwrap();
    let elements: Vec<ElementRef> = document.select(&first_recipe_title).collect();
    assert_eq!(elements.len(), 1);
    assert_eq!(elements[0].inner_html(), "spaghetti");

    Ok(())
}

#[tokio::test]
async fn recipe_view() -> Result<(), Box<dyn Error>> {
    // Arrange.
    let state = utils::common_state().await?;
    let user_id =
        utils::create_user(&state.db_connection, "president@spaceball.planet", "12345").await?;
    let recipe_id = utils::create_recipe(&state.db_connection, user_id, "spaghetti").await?;
    let server = TestServer::new(app::make_service(state))?;

    // Act.
    let response = server.get(&format!("/recipe/view/{}", recipe_id)).await;

    // Assert.
    response.assert_status_ok();

    let document = Html::parse_document(&response.text());
    if !document.errors.is_empty() {
        panic!("{:?}", document.errors);
    }

    let recipe_title = Selector::parse("#recipe-view .recipe-title").unwrap();
    let elements: Vec<ElementRef> = document.select(&recipe_title).collect();
    assert_eq!(elements.len(), 1);
    assert_eq!(elements[0].inner_html(), "spaghetti");

    Ok(())
}

#[tokio::test]
async fn user_edit() -> Result<(), Box<dyn Error>> {
    // Arrange.
    let state = utils::common_state().await?;
    let _user_id =
        utils::create_user(&state.db_connection, "president@spaceball.planet", "12345").await?;
    let token = utils::sign_in(&state.db_connection, "president@spaceball.planet", "12345").await?;
    let server = TestServer::new(app::make_service(state))?;

    // Act.
    let response = server
        .get("/user/edit")
        .add_cookie(Cookie::new("auth_token", token))
        .await;

    // Assert.
    response.assert_status_ok();

    let document = Html::parse_document(&response.text());
    if !document.errors.is_empty() {
        panic!("{:?}", document.errors);
    }

    let user_email = Selector::parse("#input-email").unwrap();
    let elements: Vec<ElementRef> = document.select(&user_email).collect();
    assert_eq!(elements.len(), 1);
    assert_eq!(
        elements[0].attr("value").unwrap(),
        "president@spaceball.planet"
    );

    Ok(())
}

#[derive(Serialize, Debug)]
pub struct SignUpFormData {
    email: String,
    password_1: String,
    password_2: String,
}

#[tokio::test]
async fn sign_up() -> Result<(), Box<dyn Error>> {
    use std::{cell::RefCell, rc::Rc};

    // Arrange.
    let validation_url: Rc<RefCell<String>> = Rc::new(RefCell::new(String::new()));

    let validation_url_clone = validation_url.clone();
    let mut mock_email_service = utils::mock_email::MockEmailService::new();
    mock_email_service
        .expect_send_email()
        .withf(|_email_sender, email_receiver, _title, _message| {
            email_receiver == "president@spaceball.planet"
        })
        .times(1)
        .returning_st(move |_email_sender, _email_receiver, _title, message| {
            let url = sscanf!(
                message,
                "Follow this link to confirm your inscription, http://127.0.0.1:8000{String}"
            )
            .unwrap();
            *validation_url_clone.borrow_mut() = url;
            Ok(())
        });

    let state = utils::common_state_with_email_service(Arc::new(mock_email_service)).await?;
    let server = TestServer::new(app::make_service(state))?;

    let tr = recipes::translation::Tr::new("en");

    // Sign up page.
    {
        // Act.
        let response = server
            .post("/signup")
            .form(&SignUpFormData {
                email: "president@spaceball.planet".into(),
                password_1: "12345678".into(),
                password_2: "12345678".into(),
            })
            .await;

        // Assert.
        response.assert_status_ok();
        let document = Html::parse_document(&response.text());
        if !document.errors.is_empty() {
            panic!("{:?}", document.errors);
        }

        let message_selector = Selector::parse("#message").unwrap();
        let element = document.select(&message_selector).next().unwrap();
        assert_eq!(
            element.inner_html(),
            tr.t(common::translation::Sentence::SignUpEmailSent)
        );
    }

    // Validation page.
    {
        // Act.
        let response = server.get(&validation_url.borrow());
        let response = response.await;

        // Assert.
        response.assert_status_ok();
        let document = Html::parse_document(&response.text());
        if !document.errors.is_empty() {
            panic!("{:?}", document.errors);
        }

        let message_selector = Selector::parse("#message").unwrap();
        let element = document.select(&message_selector).next().unwrap();
        assert_eq!(
            element.inner_html(),
            tr.t(common::translation::Sentence::SignUpEmailValidationSuccess)
        );
    }

    Ok(())
}

#[derive(Serialize, Debug)]
pub struct SignInFormData {
    email: String,
    password: String,
}

#[tokio::test]
async fn sign_in() -> Result<(), Box<dyn Error>> {
    // Arrange.
    let state = utils::common_state().await?;
    let _user_id = utils::create_user(
        &state.db_connection,
        "president@spaceball.planet",
        "12345678",
    )
    .await?;
    let server = TestServer::new(app::make_service(state))?;

    // Act.
    let response = server
        .post("/signin")
        .form(&SignInFormData {
            email: "president@spaceball.planet".into(),
            password: "12345678".into(),
        })
        .await;

    // Assert.
    response.assert_status_see_other(); // Redirection after successful sign in.
    response.assert_text("");
    response.assert_header(
        "location",
        format!(
            "/?user_message={}&user_message_icon=0",
            common::translation::Sentence::SignInSuccess as i64
        ),
    );

    Ok(())
}

#[tokio::test]
async fn create_recipe_and_edit_it() -> Result<(), Box<dyn Error>> {
    // Arrange.
    let state = utils::common_state().await?;
    let _user_id = utils::create_user(
        &state.db_connection,
        "president@spaceball.planet",
        "12345678",
    )
    .await?;
    let token = utils::sign_in(
        &state.db_connection,
        "president@spaceball.planet",
        "12345678",
    )
    .await?;
    let server = TestServer::new(app::make_service(state))?;

    // Act.
    let cookie = Cookie::new("auth_token", token);

    let response = server.get("/recipe/new").add_cookie(cookie.clone()).await;
    response.assert_status_see_other();

    let location = response.header("location").to_str().unwrap().to_string();
    let recipe_id = sscanf!(&location, "/en/recipe/edit/{i64}").unwrap();

    let response = server.get(&location).add_cookie(cookie.clone()).await;
    response.assert_status_ok();

    let response = server
        .patch(&format!("/ron-api/recipe/{recipe_id}/title"))
        .add_cookie(cookie.clone())
        .add_header(http::header::CONTENT_TYPE, common::consts::MIME_TYPE_RON)
        .bytes(web_api::to_string("AAA").unwrap().into())
        .await;
    response.assert_status_ok();

    let response = server
        .patch(&format!("/ron-api/recipe/{recipe_id}/description"))
        .add_cookie(cookie.clone())
        .add_header(http::header::CONTENT_TYPE, common::consts::MIME_TYPE_RON)
        .bytes(web_api::to_string("BBB").unwrap().into())
        .await;
    response.assert_status_ok();

    let response = server
        .patch(&format!("/ron-api/recipe/{recipe_id}/servings"))
        .add_cookie(cookie.clone())
        .add_header(http::header::CONTENT_TYPE, common::consts::MIME_TYPE_RON)
        .bytes(web_api::to_string(Some(42)).unwrap().into())
        .await;
    response.assert_status_ok();

    let response = server
        .patch(&format!("/ron-api/recipe/{recipe_id}/estimated_time"))
        .add_cookie(cookie.clone())
        .add_header(http::header::CONTENT_TYPE, common::consts::MIME_TYPE_RON)
        .bytes(web_api::to_string(Some(420)).unwrap().into())
        .await;
    response.assert_status_ok();

    let response = server
        .patch(&format!("/ron-api/recipe/{recipe_id}/difficulty"))
        .add_cookie(cookie.clone())
        .add_header(http::header::CONTENT_TYPE, common::consts::MIME_TYPE_RON)
        .bytes(
            web_api::to_string(web_api::Difficulty::Hard)
                .unwrap()
                .into(),
        )
        .await;
    response.assert_status_ok();

    let response = server
        .patch(&format!("/ron-api/recipe/{recipe_id}/language"))
        .add_cookie(cookie.clone())
        .add_header(http::header::CONTENT_TYPE, common::consts::MIME_TYPE_RON)
        .bytes(web_api::to_string("fr").unwrap().into())
        .await;
    response.assert_status_ok();

    let response = server
        .patch(&format!("/ron-api/recipe/{recipe_id}/is_public"))
        .add_cookie(cookie.clone())
        .add_header(http::header::CONTENT_TYPE, common::consts::MIME_TYPE_RON)
        .bytes(web_api::to_string(true).unwrap().into())
        .await;
    response.assert_status_ok();

    // Assert.
    let response = server
        .get(&format!("/recipe/edit/{}", recipe_id))
        .add_cookie(cookie.clone())
        .await;
    response.assert_status_ok();

    let document = Html::parse_document(&response.text());
    if !document.errors.is_empty() {
        panic!("{:?}", document.errors);
    }

    let title_selector = Selector::parse("#input-title").unwrap();
    let element_title = document.select(&title_selector).next().unwrap();
    assert_eq!(element_title.attr("value").unwrap(), "AAA");

    let description_selector = Selector::parse("#text-area-description").unwrap();
    let element_description = document.select(&description_selector).next().unwrap();
    assert_eq!(element_description.inner_html(), "BBB");

    let servings_selector = Selector::parse("#input-servings").unwrap();
    let element_servings = document.select(&servings_selector).next().unwrap();
    assert_eq!(element_servings.attr("value").unwrap(), "42");

    let estimated_time_selector = Selector::parse("#input-estimated-time").unwrap();
    let element_estimated_time = document.select(&estimated_time_selector).next().unwrap();
    assert_eq!(element_estimated_time.attr("value").unwrap(), "420");

    let selected_difficulty_selector =
        Selector::parse("#select-difficulty option[selected]").unwrap();
    let element_selected_difficulty = document
        .select(&selected_difficulty_selector)
        .next()
        .unwrap();
    assert_eq!(element_selected_difficulty.inner_html(), "Hard");

    let selected_language_selector = Selector::parse("#select-language option[selected]").unwrap();
    let element_selected_language = document.select(&selected_language_selector).next().unwrap();
    assert_eq!(element_selected_language.inner_html(), "Français");

    let is_public_selector = Selector::parse("#input-is-public").unwrap();
    let element_is_public = document.select(&is_public_selector).next().unwrap();
    assert!(element_is_public.attr("checked").is_some());

    Ok(())
}

#[tokio::test]
async fn recipe_tags() -> Result<(), Box<dyn Error>> {
    // Arrange.
    let state = utils::common_state().await?;
    let user_id = utils::create_user(
        &state.db_connection,
        "president@spaceball.planet",
        "12345678",
    )
    .await?;
    let token = utils::sign_in(
        &state.db_connection,
        "president@spaceball.planet",
        "12345678",
    )
    .await?;
    let recipe_id = utils::create_recipe(&state.db_connection, user_id, "spaghetti").await?;
    let server = TestServer::new(app::make_service(state))?;
    let cookie = Cookie::new("auth_token", token);

    // Tags list must be empty.
    let response = server
        .get(&format!("/ron-api/recipe/{recipe_id}/tags"))
        .add_cookie(cookie.clone())
        .await;
    response.assert_status_ok();
    let tags: Vec<String> = ron::de::from_bytes(response.as_bytes()).unwrap();
    assert!(tags.is_empty());

    // Act.
    // Add some tags.
    let response = server
        .post(&format!("/ron-api/recipe/{recipe_id}/tags"))
        .add_cookie(cookie.clone())
        .add_header(http::header::CONTENT_TYPE, common::consts::MIME_TYPE_RON)
        .bytes(
            web_api::to_string(vec!["ABC".to_string(), "xyz".to_string()])
                .unwrap()
                .into(),
        )
        .await;

    // Assert.
    response.assert_status_ok();
    let response = server
        .get(&format!("/ron-api/recipe/{recipe_id}/tags"))
        .add_cookie(cookie.clone())
        .await;
    response.assert_status_ok();
    let tags: Vec<String> = ron::de::from_bytes(response.as_bytes()).unwrap();
    assert_eq!(tags.len(), 2);
    assert!(tags.contains(&"abc".to_string())); // Tags are in lower case.
    assert!(tags.contains(&"xyz".to_string()));

    // Act.
    // Remove some tags.
    let response = server
        .delete(&format!("/ron-api/recipe/{recipe_id}/tags"))
        .add_cookie(cookie.clone())
        .add_header(http::header::CONTENT_TYPE, common::consts::MIME_TYPE_RON)
        .bytes(
            web_api::to_string(vec!["XYZ".to_string(), "qwe".to_string()])
                .unwrap()
                .into(),
        )
        .await;

    // Assert.
    response.assert_status_ok();
    let response = server
        .get(&format!("/ron-api/recipe/{recipe_id}/tags"))
        .add_cookie(cookie.clone())
        .await;
    response.assert_status_ok();
    let tags: Vec<String> = ron::de::from_bytes(response.as_bytes()).unwrap();
    assert_eq!(tags.len(), 1);
    assert_eq!(tags[0], "abc".to_string());

    Ok(())
}