import { NextResponse } from "next/server";
import { getServiceSupabase } from "@/lib/supabase/client";
import { getAuthenticatedUser } from "@/lib/server/auth";

export const runtime = "nodejs";

// GET - fetch all projects
export async function GET() {
  try {
    const user = await getAuthenticatedUser();
    if (!user) {
      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
    }
    
    const supabase = getServiceSupabase();
    const { data: projects, error } = await supabase
      .from("projects")
      .select("*")
      .order("created_at", { ascending: true });
    
    if (error) throw error;
    
    return NextResponse.json({ projects: projects || [] });
  } catch (error) {
    console.error(">>> API GET /projects error:", error);
    return NextResponse.json({ error: "Failed to fetch projects" }, { status: 500 });
  }
}

// POST - create a new project
export async function POST(request: Request) {
  try {
    const user = await getAuthenticatedUser();
    if (!user) {
      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
    }
    
    const body = await request.json();
    const { name, description, color } = body;
    
    if (!name || typeof name !== "string") {
      return NextResponse.json({ error: "Missing project name" }, { status: 400 });
    }
    
    const supabase = getServiceSupabase();
    const now = new Date().toISOString();
    
    const { data, error } = await supabase
      .from("projects")
      .insert({
        name,
        description: description || null,
        color: color || "#3b82f6",
        created_at: now,
      })
      .select()
      .single();
    
    if (error) throw error;
    
    return NextResponse.json({ success: true, project: data });
  } catch (error) {
    console.error(">>> API POST /projects error:", error);
    return NextResponse.json({ error: "Failed to create project" }, { status: 500 });
  }
}

// PATCH - update a project
export async function PATCH(request: Request) {
  try {
    const user = await getAuthenticatedUser();
    if (!user) {
      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
    }
    
    const body = await request.json();
    const { id, ...rawUpdates } = body;
    
    if (!id) {
      return NextResponse.json({ error: "Missing project id" }, { status: 400 });
    }
    
    const updates: Record<string, unknown> = {};
    if (typeof rawUpdates.name === "string" && rawUpdates.name.trim().length > 0) {
      updates.name = rawUpdates.name.trim();
    }
    if (Object.prototype.hasOwnProperty.call(rawUpdates, "description")) {
      updates.description =
        typeof rawUpdates.description === "string" && rawUpdates.description.trim().length > 0
          ? rawUpdates.description
          : null;
    }
    if (typeof rawUpdates.color === "string" && rawUpdates.color.trim().length > 0) {
      updates.color = rawUpdates.color;
    }
    if (Object.keys(updates).length === 0) {
      return NextResponse.json({ error: "No valid project updates provided" }, { status: 400 });
    }

    const supabase = getServiceSupabase();
    
    const { data, error } = await supabase
      .from("projects")
      .update(updates)
      .eq("id", id)
      .select()
      .single();
    
    if (error) throw error;
    
    return NextResponse.json({ success: true, project: data });
  } catch (error) {
    console.error(">>> API PATCH /projects error:", error);
    return NextResponse.json({ error: "Failed to update project" }, { status: 500 });
  }
}

// DELETE - delete a project
export async function DELETE(request: Request) {
  try {
    const user = await getAuthenticatedUser();
    if (!user) {
      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
    }
    
    const { id } = await request.json();
    
    if (!id) {
      return NextResponse.json({ error: "Missing project id" }, { status: 400 });
    }
    
    const supabase = getServiceSupabase();
    const { error, count } = await supabase
      .from("projects")
      .delete({ count: "exact" })
      .eq("id", id);
    
    if (error) throw error;
    if ((count ?? 0) === 0) {
      return NextResponse.json({ error: "Project not found" }, { status: 404 });
    }
    
    return NextResponse.json({ success: true });
  } catch (error) {
    console.error(">>> API DELETE /projects error:", error);
    return NextResponse.json({ error: "Failed to delete project" }, { status: 500 });
  }
}