// SPDX-FileCopyrightText: 2024 Simon Bruder <simon@sbruder.de>
//
// SPDX-License-Identifier: AGPL-3.0-or-later

use actix_web::{error, get, post, web, Responder};
use maud::html;
use sqlx::PgPool;
use uuid::Uuid;

use super::templates::{self, forms, TemplateConfig};
use crate::manage;
use crate::models::*;

pub fn config(cfg: &mut web::ServiceConfig) {
    cfg.service(show_item_class)
        .service(list_item_classes)
        .service(add_item_class)
        .service(add_item_class_post)
        .service(edit_item_class)
        .service(edit_item_class_post);
}

#[get("/item-class/{id}")]
async fn show_item_class(
    pool: web::Data<PgPool>,
    path: web::Path<Uuid>,
) -> actix_web::Result<impl Responder> {
    let id = path.into_inner();

    let item_class = manage::item_class::get(&pool, id)
        .await
        .map_err(error::ErrorInternalServerError)?;

    // TODO: Once async closures are stable, use map_or on item_class.parent instead
    let parent = match item_class.parent {
        Some(id) => manage::item_class::get(&pool, id)
            .await
            .map(Some)
            .map_err(error::ErrorInternalServerError)?,
        None => None,
    };

    let children = manage::item_class::children(&pool, id)
        .await
        .map_err(error::ErrorInternalServerError)?;

    let mut title = item_class.name.clone();
    title.push_str(" – Item Details");

    Ok(templates::base(
        TemplateConfig {
            path: &format!("/item-class/{}", item_class.id),
            title: Some(&title),
            page_title: Some(Box::new(item_class.name.clone())),
            page_actions: vec![
                (templates::helpers::PageAction {
                    href: &format!("/item-class/{}/edit", item_class.id),
                    name: "Edit",
                }),
            ],
            ..Default::default()
        },
        html! {
            table .table {
                tr {
                    th { "UUID" }
                    td { (item_class.id) }
                }
                tr {
                    th { "Name" }
                    td { (item_class.name) }
                }
                @if let Some(parent) = parent {
                    tr {
                        th { "Parent" }
                        td { a href={ "/item-class/" (parent.id) } { (parent.name) } }
                    }
                }
            }

            @if !children.is_empty() {
                h3 .mt-4 { "Children" }

                ul {
                    @for child in children {
                        li {
                            a href={ "/item-class/" (child.id) } { (child.name) }
                        }
                    }
                }
            }
        },
    ))
}

#[get("/item-classes")]
async fn list_item_classes(pool: web::Data<PgPool>) -> actix_web::Result<impl Responder> {
    let item_classes_ids = sqlx::query_scalar!("SELECT id FROM item_classes ORDER BY created_at")
        .fetch_all(pool.as_ref())
        .await
        .map_err(error::ErrorInternalServerError)?;

    let item_classes = manage::item_class::get_all_as_map(&pool)
        .await
        .map_err(error::ErrorInternalServerError)?;

    Ok(templates::base(
        TemplateConfig {
            path: "/item-classes",
            title: Some("Item Class List"),
            page_title: Some(Box::new("Item Class List")),
            page_actions: vec![
                (templates::helpers::PageAction {
                    href: "/item-classes/add",
                    name: "Add",
                }),
            ],
            ..Default::default()
        },
        html! {
            table .table {
                thead {
                    tr {
                        th { "Name" }
                        th { "Parents" }
                    }
                }
                tbody {
                    @for item_class in item_classes_ids {
                        @let item_class = item_classes.get(&item_class).unwrap();
                        tr {
                            td { a href={ "/item-class/" (item_class.id) } { (item_class.name) } }
                            td {
                                @if let Some(parent) = item_class.parent {
                                    @let parent = item_classes.get(&parent).unwrap();
                                    a href={ "/item-class/" (parent.id) } { (parent.name) }
                                } @else {
                                    "-"
                                }
                            }
                        }
                    }
                }
            }
        },
    ))
}

#[get("/item-classes/add")]
async fn add_item_class() -> actix_web::Result<impl Responder> {
    Ok(templates::base(
        TemplateConfig {
            path: "/items-classes/add",
            title: Some("Add Item Class"),
            page_title: Some(Box::new("Add Item Class")),
            ..Default::default()
        },
        html! {
            form method="POST" {
                (forms::InputGroup {
                    r#type: forms::InputType::Text,
                    name: "name",
                    title: "Name",
                    required: true,
                    ..Default::default()
                })
                (forms::InputGroup {
                    r#type: forms::InputType::Text,
                    name: "parent",
                    title: "Parent",
                    disabled: true,
                    ..Default::default()
                })

                button .btn.btn-primary type="submit" { "Add" }
            }
        },
    ))
}

#[post("/item-classes/add")]
async fn add_item_class_post(
    data: web::Form<NewItemClass>,
    pool: web::Data<PgPool>,
) -> actix_web::Result<impl Responder> {
    let item = manage::item_class::add(&pool, data.into_inner())
        .await
        .map_err(error::ErrorInternalServerError)?;
    Ok(web::Redirect::to("/item-class/".to_owned() + &item.id.to_string()).see_other())
}

#[get("/item-class/{id}/edit")]
async fn edit_item_class(
    pool: web::Data<PgPool>,
    path: web::Path<Uuid>,
) -> actix_web::Result<impl Responder> {
    let id = path.into_inner();

    let item_class = manage::item_class::get(&pool, id)
        .await
        .map_err(error::ErrorInternalServerError)?;

    let mut title = item_class.name.clone();
    title.push_str(" – Item Details");

    Ok(templates::base(
        TemplateConfig {
            path: &format!("/items-class/{}/add", id),
            title: Some(&title),
            page_title: Some(Box::new(item_class.name.clone())),
            ..Default::default()
        },
        html! {
            form method="POST" {
                (forms::InputGroup {
                    r#type: forms::InputType::Text,
                    name: "id",
                    title: "UUID",
                    disabled: true,
                    required: true,
                    value: Some(item_class.id.to_string()),
                })
                (forms::InputGroup {
                    r#type: forms::InputType::Text,
                    name: "name",
                    title: "Name",
                    required: true,
                    value: Some(item_class.name),
                    ..Default::default()
                })
                (forms::InputGroup {
                    r#type: forms::InputType::Text,
                    name: "parent",
                    title: "Parent",
                    disabled: item_class.parent.is_none(),
                    value: item_class.parent.map(|id| id.to_string()),
                    ..Default::default()
                })

                button .btn.btn-primary type="submit" { "Edit" }
            }
        },
    ))
}

#[post("/item-class/{id}/edit")]
async fn edit_item_class_post(
    pool: web::Data<PgPool>,
    path: web::Path<Uuid>,
    data: web::Form<NewItemClass>,
) -> actix_web::Result<impl Responder> {
    let id = path.into_inner();

    let item_class = manage::item_class::update(&pool, id, data.into_inner())
        .await
        .map_err(error::ErrorInternalServerError)?;

    Ok(web::Redirect::to("/item-class/".to_owned() + &item_class.id.to_string()).see_other())
}