import { NextRequest, NextResponse } from "next/server"
import { query } from "@/lib/db"
import { getSessionUser, setSessionContext } from "@/lib/auth"

export async function PATCH(request: NextRequest, { params: routeParams }: { params: Promise<{ id: string }> }) {
  try {
    const sessionUser = await getSessionUser()
    if (!sessionUser) {
      return NextResponse.json({ error: "Not authenticated." }, { status: 401 })
    }
    if (sessionUser.role !== "admin" && sessionUser.role !== "super_admin") {
      return NextResponse.json({ error: "Forbidden. Only admins can update bug reports." }, { status: 403 })
    }

    const { id } = await routeParams
    const { status, assigned_to, resolution_notes } = await request.json()

    const ipAddress =
      request.headers.get("x-forwarded-for")?.split(",")[0]?.trim() ||
      request.headers.get("x-real-ip") ||
      "127.0.0.1"

    await setSessionContext(sessionUser.id, ipAddress)

    const validStatuses = ["open", "in_progress", "resolved", "closed"]
    if (status && !validStatuses.includes(status)) {
      return NextResponse.json({ error: "Invalid status." }, { status: 400 })
    }

    const existing = await query("SELECT id, status FROM bug_reports WHERE id = $1", [id])
    if (existing.rows.length === 0) {
      return NextResponse.json({ error: "Bug report not found." }, { status: 404 })
    }

    const updates: string[] = []
    const values: unknown[] = []
    let paramIndex = 1

    if (status !== undefined) {
      updates.push(`status = $${paramIndex++}`)
      values.push(status)
    }
    if (assigned_to !== undefined) {
      updates.push(`assigned_to = $${paramIndex++}`)
      values.push(assigned_to === "null" ? null : assigned_to)
    }
    if (resolution_notes !== undefined) {
      updates.push(`resolution_notes = $${paramIndex++}`)
      values.push(resolution_notes)
    }

    if (updates.length === 0) {
      return NextResponse.json({ error: "No fields to update." }, { status: 400 })
    }

    updates.push(`updated_at = NOW()`)
    values.push(id)

    await query(
      `UPDATE bug_reports SET ${updates.join(", ")} WHERE id = $${paramIndex}`,
      values
    )

    return NextResponse.json({ success: true }, { status: 200 })
  } catch (error) {
    console.error("Error updating bug report:", error)
    return NextResponse.json({ error: "Failed to update bug report." }, { status: 500 })
  }
}
