import { run } from "@/lib/db";
import { cookies } from "next/headers";
import { verifyToken, createToken } from "@/app/api/auth/[...nextauth]/route";

export async function POST(request, context) {
  try {
    // Verify user authentication
    const cookieStore = await cookies();
    const sessionToken = cookieStore.get("next-auth.session-token")?.value;

    if (!sessionToken) {
      return Response.json({ error: "Unauthorized" }, { status: 401 });
    }

    const userData = verifyToken(sessionToken);
    if (!userData) {
      return Response.json({ error: "Invalid session" }, { status: 401 });
    }

    // Get teamId from URL params
    const params = await Promise.resolve(context.params);
    const teamId = params?.teamId;

    // Validate teamId
    if (!teamId || isNaN(parseInt(teamId, 10))) {
      return Response.json({ error: "Invalid team ID" }, { status: 400 });
    }

    // Check if user is actually in this team
    if (userData.teamId != teamId) {
      return Response.json(
        { error: "You are not part of this team" },
        { status: 403 }
      );
    }

    // Update the user record to remove team association
    await run("UPDATE users SET team_id = NULL WHERE id = ?", [userData.id]);

    // Try to update the team's last_updated timestamp but don't fail if column doesn't exist
    try {
      await run("UPDATE teams SET last_updated = ? WHERE id = ?", [
        new Date().toISOString(),
        teamId,
      ]);
    } catch (updateError) {
      // Log but don't fail if we can't update timestamp
      console.warn(
        "Failed to update last_updated timestamp:",
        updateError.message
      );
    }

    // Create a new token with updated user data (without teamId)
    const newUserData = {
      ...userData,
      teamId: null, // Remove team association in token
      iat: Math.floor(Date.now() / 1000),
      exp: Math.floor(Date.now() / 1000) + 30 * 24 * 60 * 60, // 30 days
    };

    const newToken = createToken(newUserData);

    // Calculate expiration date for cookie
    const expiryDate = new Date();
    expiryDate.setDate(expiryDate.getDate() + 30);

    // Return success with updated session token
    return new Response(
      JSON.stringify({
        success: true,
        message: "Successfully left the team",
      }),
      {
        status: 200,
        headers: {
          "Content-Type": "application/json",
          "Set-Cookie": `next-auth.session-token=${newToken}; Path=/; HttpOnly; SameSite=Lax; Expires=${expiryDate.toUTCString()}`,
        },
      }
    );
  } catch (error) {
    console.error("Leave team error:", error);
    return Response.json(
      { error: "Failed to leave team: " + error.message },
      { status: 500 }
    );
  }
}