use crate::color;
use crate::section::{RenderContext, SectionOutput};

pub fn render(ctx: &RenderContext) -> Option<SectionOutput> {
    if !ctx.config.sections.cloud_profile.enabled {
        return None;
    }

    // AWS: $AWS_PROFILE (most common)
    if let Ok(profile) = std::env::var("AWS_PROFILE") {
        if !profile.is_empty() {
            return render_cloud(ctx, "aws", &profile);
        }
    }

    // GCP: $CLOUDSDK_CORE_PROJECT or $GCLOUD_PROJECT
    for var in &["CLOUDSDK_CORE_PROJECT", "GCLOUD_PROJECT"] {
        if let Ok(project) = std::env::var(var) {
            if !project.is_empty() {
                return render_cloud(ctx, "gcp", &project);
            }
        }
    }

    // Azure: $AZURE_SUBSCRIPTION_ID (lightweight check)
    if let Ok(sub) = std::env::var("AZURE_SUBSCRIPTION_ID") {
        if !sub.is_empty() {
            // Truncate subscription ID — they're long UUIDs
            let display = if sub.len() > 12 {
                format!("{}...", &sub[..8])
            } else {
                sub
            };
            return render_cloud(ctx, "az", &display);
        }
    }

    None
}

fn render_cloud(ctx: &RenderContext, provider: &str, name: &str) -> Option<SectionOutput> {
    let raw = format!("{provider}:{name}");

    let ansi = if ctx.color_enabled {
        let provider_color = match provider {
            "aws" => "\x1b[38;2;255;153;0m",  // AWS orange
            "gcp" => "\x1b[38;2;66;133;244m", // GCP blue
            "az" => "\x1b[38;2;0;120;212m",   // Azure blue
            _ => color::DIM,
        };
        let reset = color::RESET;
        let dim = color::DIM;
        format!("{provider_color}{provider}{reset}{dim}:{reset}{name}")
    } else {
        raw.clone()
    };

    Some(SectionOutput { raw, ansi })
}