/**
 * GET /api/staff/report?org=<id>&key=<secret>
 *
 * Returns a comprehensive read-only StaffReportPayload for the given
 * organization. Field list is built at request time from
 * CustomField.get (no static config).
 *
 * Auth: STAFF_REPORT_KEY must match the `key` query param.
 *
 * STUB MODE: if CiviCRM env vars are unset, returns a fabricated payload
 * exercising every render kind so the staff page is usable in dev.
 */

import { NextRequest, NextResponse } from "next/server";
import { isStaffKeyValid } from "@/lib/staff-auth";
import type { StaffReportPayload } from "@/types/form";

function isCiviStubMode(): boolean {
  return !(
    process.env.CIVI_BASE_URL &&
    process.env.CIVI_API_KEY &&
    process.env.CIVI_SITE_KEY
  );
}

function buildStubPayload(orgId: number): StaffReportPayload {
  const today = new Date();
  const daysAgo = (n: number) =>
    new Date(today.getTime() - n * 24 * 3600 * 1000).toISOString();
  const ymd = (n: number) => {
    const d = new Date(today.getTime() - n * 24 * 3600 * 1000);
    return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}-${String(d.getDate()).padStart(2, "0")}`;
  };
  return {
    orgId,
    orgName: "Sample Co-op (stub)",
    currentStage: "Organizing",
    sections: [
      {
        groupName: "Food_Co_op_Organizing",
        groupTitle: "Organization profile",
        groupKind: "org",
        fields: [
          {
            descriptor: {
              groupName: "Food_Co_op_Organizing",
              groupTitle: "Organization profile",
              groupKind: "org",
              civiField: "Food_Co_op_Organizing.Date_Incorporated",
              name: "Date_Incorporated",
              label: "Date Incorporated",
              render: "date",
            },
            history: [{ activityId: 0, date: "", value: ymd(900) }],
          },
          {
            descriptor: {
              groupName: "Food_Co_op_Organizing",
              groupTitle: "Organization profile",
              groupKind: "org",
              civiField: "Food_Co_op_Organizing.Equity_share",
              name: "Equity_share",
              label: "Equity share (USD)",
              render: "currency",
            },
            history: [{ activityId: 0, date: "", value: 200 }],
          },
        ],
      },
      {
        groupName: "Check_in_data__organizing_",
        groupTitle: "Check-in data (organizing)",
        groupKind: "activity",
        fields: [
          {
            descriptor: {
              groupName: "Check_in_data__organizing_",
              groupTitle: "Check-in data (organizing)",
              groupKind: "activity",
              civiField: "Check_in_data__organizing_.Members__current_",
              name: "Members__current_",
              label: "Members (current)",
              render: "number",
            },
            history: [
              { activityId: 9012, date: daysAgo(3), value: 124 },
              { activityId: 9008, date: daysAgo(34), value: 109 },
              { activityId: 8995, date: daysAgo(95), value: 87 },
            ],
          },
          {
            descriptor: {
              groupName: "Check_in_data__organizing_",
              groupTitle: "Check-in data (organizing)",
              groupKind: "activity",
              civiField: "Check_in_data__organizing_.Member_Goal_for_current_Stage",
              name: "Member_Goal_for_current_Stage",
              label: "Member goal for current stage",
              render: "number",
            },
            history: [{ activityId: 9008, date: daysAgo(34), value: 200 }],
          },
          {
            descriptor: {
              groupName: "Check_in_data__organizing_",
              groupTitle: "Check-in data (organizing)",
              groupKind: "activity",
              civiField: "Check_in_data__organizing_.Peer_Group_Participation",
              name: "Peer_Group_Participation",
              label: "Peer group participation",
              render: "select",
              optionGroupId: 140,
            },
            history: [
              { activityId: 9012, date: daysAgo(3), value: "Yes" },
              { activityId: 9008, date: daysAgo(34), value: "Considering" },
            ],
          },
          {
            descriptor: {
              groupName: "Check_in_data__organizing_",
              groupTitle: "Check-in data (organizing)",
              groupKind: "activity",
              civiField: "Check_in_data__organizing_.Internal_Note",
              name: "Internal_Note",
              label: "Internal note",
              render: "longtext",
            },
            history: [
              {
                activityId: 9012,
                date: daysAgo(3),
                value:
                  "Strong member momentum this quarter. Need a working group lead before next check-in.",
              },
            ],
          },
        ],
      },
      {
        groupName: "Stage_1",
        groupTitle: "Stage 1",
        groupKind: "activity",
        fields: [
          {
            descriptor: {
              groupName: "Stage_1",
              groupTitle: "Stage 1",
              groupKind: "activity",
              civiField: "Stage_1.Vision_Upload",
              name: "Vision_Upload",
              label: "Vision — Upload",
              render: "file",
            },
            history: [
              {
                activityId: 9012,
                date: daysAgo(3),
                value: { id: 4242, file_name: "co-op-vision.pdf" },
              },
            ],
          },
        ],
      },
    ],
    activities: [
      { id: 9012, date: daysAgo(3), subject: "Co-op Survey (form submission)", submittedBy: "Jane Doe" },
      { id: 9008, date: daysAgo(34), subject: "Co-op Survey (form submission)", submittedBy: "Jane Doe" },
      { id: 9001, date: daysAgo(62), stage: "Organizing", subject: "Stage transition (staff)" },
      { id: 8995, date: daysAgo(95), subject: "Co-op Survey (form submission)", submittedBy: "John Roe" },
    ],
    options: {
      140: [
        { value: "Yes", label: "Yes" },
        { value: "No", label: "No" },
        { value: "Considering", label: "Considering" },
      ],
      75: [
        { value: "Inquiry", label: "Inquiry" },
        { value: "Organizing", label: "Stage 1 — Convene & Prepare" },
        { value: "Feasibility", label: "Stage 2 — Grow & Plan" },
        { value: "Business feasibility", label: "Stage 3 — Connect & Gather" },
        { value: "Store Implementation", label: "Stage 4 — Excite & Build" },
        { value: "Stabilize newly opened co-op", label: "Stage 5 — Fulfill & Stabilize" },
      ],
    },
  };
}

export async function GET(req: NextRequest) {
  const url = new URL(req.url);
  const key = url.searchParams.get("key");
  const orgStr = url.searchParams.get("org");

  if (!isStaffKeyValid(key)) {
    // Don't leak whether the route exists.
    return new NextResponse("Not found", { status: 404 });
  }

  const orgId = Number(orgStr);
  if (!orgStr || !Number.isFinite(orgId) || orgId <= 0) {
    return NextResponse.json({ error: "Missing or invalid org id." }, { status: 400 });
  }

  if (isCiviStubMode()) {
    return NextResponse.json(buildStubPayload(orgId));
  }

  // Live Civi branch added in Task 8.
  return NextResponse.json({ error: "Live mode not yet implemented." }, { status: 501 });
}