use axum::extract::{Path, State};
use axum::http::StatusCode;
use axum::response::{Html, IntoResponse, Response};
use axum::routing::get;
use axum::Router;
use forage_core::platform::validate_slug;
use forage_core::session::CachedOrg;
use minijinja::context;

use super::error_page;
use crate::auth::Session;
use crate::state::AppState;

pub fn router() -> Router<AppState> {
    Router::new()
        .route("/orgs/{org}/projects", get(projects_list))
        .route("/orgs/{org}/projects/{project}", get(project_detail))
        .route("/orgs/{org}/usage", get(usage))
}

fn orgs_context(orgs: &[CachedOrg]) -> Vec<minijinja::Value> {
    orgs.iter()
        .map(|o| context! { name => o.name, role => o.role })
        .collect()
}

async fn projects_list(
    State(state): State<AppState>,
    session: Session,
    Path(org): Path<String>,
) -> Result<Response, Response> {
    if !validate_slug(&org) {
        return Err(error_page(&state, StatusCode::BAD_REQUEST, "Invalid request", "Invalid organisation name."));
    }

    let orgs = &session.user.orgs;

    if !orgs.iter().any(|o| o.name == org) {
        return Err(error_page(&state, StatusCode::FORBIDDEN, "Access denied", "You don't have access to this organisation."));
    }

    let projects = state
        .platform_client
        .list_projects(&session.access_token, &org)
        .await
        .unwrap_or_default();

    let html = state
        .templates
        .render(
            "pages/projects.html.jinja",
            context! {
                title => format!("{org} - Projects - Forage"),
                description => format!("Projects in {org}"),
                user => context! { username => session.user.username },
                csrf_token => &session.csrf_token,
                current_org => &org,
                orgs => orgs_context(orgs),
                org_name => &org,
                projects => projects,
            },
        )
        .map_err(|e| {
            tracing::error!("template error: {e:#}");
            error_page(&state, StatusCode::INTERNAL_SERVER_ERROR, "Something went wrong", "Please try again.")
        })?;

    Ok(Html(html).into_response())
}

async fn project_detail(
    State(state): State<AppState>,
    session: Session,
    Path((org, project)): Path<(String, String)>,
) -> Result<Response, Response> {
    if !validate_slug(&org) || !validate_slug(&project) {
        return Err(error_page(&state, StatusCode::BAD_REQUEST, "Invalid request", "Invalid organisation or project name."));
    }

    let orgs = &session.user.orgs;

    if !orgs.iter().any(|o| o.name == org) {
        return Err(error_page(&state, StatusCode::FORBIDDEN, "Access denied", "You don't have access to this organisation."));
    }

    let artifacts = state
        .platform_client
        .list_artifacts(&session.access_token, &org, &project)
        .await
        .unwrap_or_default();

    let html = state
        .templates
        .render(
            "pages/project_detail.html.jinja",
            context! {
                title => format!("{project} - {org} - Forage"),
                description => format!("Project {project} in {org}"),
                user => context! { username => session.user.username },
                csrf_token => &session.csrf_token,
                current_org => &org,
                orgs => orgs_context(orgs),
                org_name => &org,
                project_name => &project,
                artifacts => artifacts.iter().map(|a| context! {
                    slug => a.slug,
                    title => a.context.title,
                    description => a.context.description,
                    created_at => a.created_at,
                }).collect::<Vec<_>>(),
            },
        )
        .map_err(|e| {
            tracing::error!("template error: {e:#}");
            error_page(&state, StatusCode::INTERNAL_SERVER_ERROR, "Something went wrong", "Please try again.")
        })?;

    Ok(Html(html).into_response())
}

async fn usage(
    State(state): State<AppState>,
    session: Session,
    Path(org): Path<String>,
) -> Result<Response, Response> {
    if !validate_slug(&org) {
        return Err(error_page(&state, StatusCode::BAD_REQUEST, "Invalid request", "Invalid organisation name."));
    }

    let orgs = &session.user.orgs;

    let current_org_data = orgs.iter().find(|o| o.name == org);
    let current_org_data = match current_org_data {
        Some(o) => o,
        None => return Err(error_page(&state, StatusCode::FORBIDDEN, "Access denied", "You don't have access to this organisation.")),
    };

    let projects = state
        .platform_client
        .list_projects(&session.access_token, &org)
        .await
        .unwrap_or_default();

    let html = state
        .templates
        .render(
            "pages/usage.html.jinja",
            context! {
                title => format!("Usage - {org} - Forage"),
                description => format!("Usage and plan for {org}"),
                user => context! { username => session.user.username },
                csrf_token => &session.csrf_token,
                current_org => &org,
                orgs => orgs_context(orgs),
                org_name => &org,
                role => &current_org_data.role,
                project_count => projects.len(),
            },
        )
        .map_err(|e| {
            tracing::error!("template error: {e:#}");
            error_page(&state, StatusCode::INTERNAL_SERVER_ERROR, "Something went wrong", "Please try again.")
        })?;

    Ok(Html(html).into_response())
}