use axum::{
    debug_handler,
    extract::{Extension, Query, State},
    http::StatusCode,
    response::{ErrorResponse, IntoResponse, Result},
};
use serde::Deserialize;
// use tracing::{event, Level};

use crate::{
    data::db,
    model,
    ron_extractor::ExtractRon,
    ron_utils::{ron_error, ron_response},
};

const NOT_AUTHORIZED_MESSAGE: &str = "Action not authorized";

#[allow(dead_code)]
#[debug_handler]
pub async fn update_user(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::UpdateProfile>,
) -> Result<StatusCode> {
    if let Some(user) = user {
        connection
            .update_user(
                user.id,
                ron.email.as_deref().map(str::trim),
                ron.name.as_deref(),
                ron.password.as_deref(),
            )
            .await?;
    } else {
        return Err(ErrorResponse::from(ron_error(
            StatusCode::UNAUTHORIZED,
            NOT_AUTHORIZED_MESSAGE,
        )));
    }
    Ok(StatusCode::OK)
}

async fn check_user_rights_recipe(
    connection: &db::Connection,
    user: &Option<model::User>,
    recipe_id: i64,
) -> Result<()> {
    if user.is_none()
        || !connection
            .can_edit_recipe(user.as_ref().unwrap().id, recipe_id)
            .await?
    {
        Err(ErrorResponse::from(ron_error(
            StatusCode::UNAUTHORIZED,
            NOT_AUTHORIZED_MESSAGE,
        )))
    } else {
        Ok(())
    }
}

async fn check_user_rights_recipe_group(
    connection: &db::Connection,
    user: &Option<model::User>,
    group_id: i64,
) -> Result<()> {
    if user.is_none()
        || !connection
            .can_edit_recipe_group(user.as_ref().unwrap().id, group_id)
            .await?
    {
        Err(ErrorResponse::from(ron_error(
            StatusCode::UNAUTHORIZED,
            NOT_AUTHORIZED_MESSAGE,
        )))
    } else {
        Ok(())
    }
}

async fn check_user_rights_recipe_step(
    connection: &db::Connection,
    user: &Option<model::User>,
    step_id: i64,
) -> Result<()> {
    if user.is_none()
        || !connection
            .can_edit_recipe_step(user.as_ref().unwrap().id, step_id)
            .await?
    {
        Err(ErrorResponse::from(ron_error(
            StatusCode::UNAUTHORIZED,
            NOT_AUTHORIZED_MESSAGE,
        )))
    } else {
        Ok(())
    }
}

async fn check_user_rights_recipe_ingredient(
    connection: &db::Connection,
    user: &Option<model::User>,
    ingredient_id: i64,
) -> Result<()> {
    if user.is_none()
        || !connection
            .can_edit_recipe_ingredient(user.as_ref().unwrap().id, ingredient_id)
            .await?
    {
        Err(ErrorResponse::from(ron_error(
            StatusCode::UNAUTHORIZED,
            NOT_AUTHORIZED_MESSAGE,
        )))
    } else {
        Ok(())
    }
}

#[debug_handler]
pub async fn set_recipe_title(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetRecipeTitle>,
) -> Result<StatusCode> {
    check_user_rights_recipe(&connection, &user, ron.recipe_id).await?;
    connection
        .set_recipe_title(ron.recipe_id, &ron.title)
        .await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_recipe_description(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetRecipeDescription>,
) -> Result<StatusCode> {
    check_user_rights_recipe(&connection, &user, ron.recipe_id).await?;
    connection
        .set_recipe_description(ron.recipe_id, &ron.description)
        .await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_servings(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetRecipeServings>,
) -> Result<StatusCode> {
    check_user_rights_recipe(&connection, &user, ron.recipe_id).await?;
    connection
        .set_recipe_servings(ron.recipe_id, ron.servings)
        .await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_estimated_time(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetRecipeEstimatedTime>,
) -> Result<StatusCode> {
    check_user_rights_recipe(&connection, &user, ron.recipe_id).await?;
    connection
        .set_recipe_estimated_time(ron.recipe_id, ron.estimated_time)
        .await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_difficulty(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetRecipeDifficulty>,
) -> Result<StatusCode> {
    check_user_rights_recipe(&connection, &user, ron.recipe_id).await?;
    connection
        .set_recipe_difficulty(ron.recipe_id, ron.difficulty)
        .await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_language(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetRecipeLanguage>,
) -> Result<StatusCode> {
    check_user_rights_recipe(&connection, &user, ron.recipe_id).await?;
    connection
        .set_recipe_language(ron.recipe_id, &ron.lang)
        .await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_is_published(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetIsPublished>,
) -> Result<StatusCode> {
    check_user_rights_recipe(&connection, &user, ron.recipe_id).await?;
    connection
        .set_recipe_is_published(ron.recipe_id, ron.is_published)
        .await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn rm(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::Remove>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe(&connection, &user, ron.recipe_id).await?;
    connection.rm_recipe(ron.recipe_id).await?;
    Ok(StatusCode::OK)
}

impl From<model::Group> for common::ron_api::Group {
    fn from(group: model::Group) -> Self {
        Self {
            id: group.id,
            name: group.name,
            comment: group.comment,
            steps: group
                .steps
                .into_iter()
                .map(common::ron_api::Step::from)
                .collect(),
        }
    }
}

impl From<model::Step> for common::ron_api::Step {
    fn from(step: model::Step) -> Self {
        Self {
            id: step.id,
            action: step.action,
            ingredients: step
                .ingredients
                .into_iter()
                .map(common::ron_api::Ingredient::from)
                .collect(),
        }
    }
}

impl From<model::Ingredient> for common::ron_api::Ingredient {
    fn from(ingredient: model::Ingredient) -> Self {
        Self {
            id: ingredient.id,
            name: ingredient.name,
            comment: ingredient.comment,
            quantity_value: ingredient.quantity_value,
            quantity_unit: ingredient.quantity_unit,
        }
    }
}

#[derive(Deserialize)]
pub struct RecipeId {
    #[serde(rename = "recipe_id")]
    id: i64,
}

#[debug_handler]
pub async fn get_groups(
    State(connection): State<db::Connection>,
    recipe_id: Query<RecipeId>,
) -> Result<impl IntoResponse> {
    // Here we don't check user rights on purpose.
    Ok(ron_response(
        StatusCode::OK,
        connection
            .get_groups(recipe_id.id)
            .await?
            .into_iter()
            .map(common::ron_api::Group::from)
            .collect::<Vec<_>>(),
    ))
}

#[debug_handler]
pub async fn add_group(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::AddRecipeGroup>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe(&connection, &user, ron.recipe_id).await?;
    let group_id = connection.add_recipe_group(ron.recipe_id).await?;

    Ok(ron_response(
        StatusCode::OK,
        common::ron_api::AddRecipeGroupResult { group_id },
    ))
}

#[debug_handler]
pub async fn rm_group(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::RemoveRecipeGroup>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_group(&connection, &user, ron.group_id).await?;
    connection.rm_recipe_group(ron.group_id).await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_group_name(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetGroupName>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_group(&connection, &user, ron.group_id).await?;
    connection.set_group_name(ron.group_id, &ron.name).await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_group_comment(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetGroupComment>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_group(&connection, &user, ron.group_id).await?;
    connection
        .set_group_comment(ron.group_id, &ron.comment)
        .await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn add_step(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::AddRecipeStep>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_group(&connection, &user, ron.group_id).await?;
    let step_id = connection.add_recipe_step(ron.group_id).await?;

    Ok(ron_response(
        StatusCode::OK,
        common::ron_api::AddRecipeStepResult { step_id },
    ))
}

#[debug_handler]
pub async fn rm_step(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::RemoveRecipeStep>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_step(&connection, &user, ron.step_id).await?;
    connection.rm_recipe_step(ron.step_id).await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_step_action(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetStepAction>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_step(&connection, &user, ron.step_id).await?;
    connection.set_step_action(ron.step_id, &ron.action).await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn add_ingredient(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::AddRecipeIngredient>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_step(&connection, &user, ron.step_id).await?;
    let ingredient_id = connection.add_recipe_ingredient(ron.step_id).await?;

    Ok(ron_response(
        StatusCode::OK,
        common::ron_api::AddRecipeIngredientResult { ingredient_id },
    ))
}

#[debug_handler]
pub async fn rm_ingredient(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::RemoveRecipeIngredient>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_ingredient(&connection, &user, ron.ingredient_id).await?;
    connection.rm_recipe_ingredient(ron.ingredient_id).await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_ingredient_name(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetIngredientName>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_ingredient(&connection, &user, ron.ingredient_id).await?;
    connection
        .set_ingredient_name(ron.ingredient_id, &ron.name)
        .await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_ingredient_comment(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetIngredientComment>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_ingredient(&connection, &user, ron.ingredient_id).await?;
    connection
        .set_ingredient_comment(ron.ingredient_id, &ron.comment)
        .await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_ingredient_quantity(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetIngredientQuantity>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_ingredient(&connection, &user, ron.ingredient_id).await?;
    connection
        .set_ingredient_quantity(ron.ingredient_id, ron.quantity)
        .await?;
    Ok(StatusCode::OK)
}

#[debug_handler]
pub async fn set_ingredient_unit(
    State(connection): State<db::Connection>,
    Extension(user): Extension<Option<model::User>>,
    ExtractRon(ron): ExtractRon<common::ron_api::SetIngredientUnit>,
) -> Result<impl IntoResponse> {
    check_user_rights_recipe_ingredient(&connection, &user, ron.ingredient_id).await?;
    connection
        .set_ingredient_unit(ron.ingredient_id, &ron.unit)
        .await?;
    Ok(StatusCode::OK)
}

///// 404 /////
#[debug_handler]
pub async fn not_found(Extension(_user): Extension<Option<model::User>>) -> impl IntoResponse {
    ron_error(StatusCode::NOT_FOUND, "Not found")
}