import type { Page } from "@playwright/test";

const emptyRuntimeSnapshot = {
  availability: "not_configured",
  source: "none",
  scenario_availability: "not_configured",
  artifact_availability: "not_configured",
  schedule_availability: "not_configured",
  work_order_availability: "not_configured",
  alert_availability: "not_configured",
  generated_at: "2026-09-17T02:30:00Z",
  conditions: [],
  alerts: [],
  scenarios: [],
  latest_analysis: null,
  work_orders: []
};

export const TEST_PROJECT_ID = "324ff7ee-c2d4-5184-a84b-48fb14a2933e";

export async function mockScadaApi(
  page: Page,
  devices: unknown[] = [],
  runtimeSnapshot: unknown = emptyRuntimeSnapshot,
  readings: unknown[] = [],
  projectPresentation?: { metadata: unknown; accessContext: unknown },
  analysisRuns: Record<string, unknown> = {},
  analysisHistory: unknown[] = []
) {
  const corsHeaders = { "Access-Control-Allow-Origin": "*" };
  await page.route("https://tjwater-api.invalid/**", async (route) => {
    if (route.request().method() === "OPTIONS") {
      await route.fulfill({
        status: 204,
        headers: {
          ...corsHeaders,
          "Access-Control-Allow-Headers": "Authorization, Content-Type, Last-Event-ID, X-Project-Id",
          "Access-Control-Allow-Methods": "DELETE, GET, PATCH, POST, OPTIONS"
        }
      });
      return;
    }

    const url = new URL(route.request().url());
    if (url.pathname === "/api/v1/projects") {
      await route.fulfill({
        contentType: "application/json",
        headers: corsHeaders,
        body: JSON.stringify({
          items: [{ project_id: TEST_PROJECT_ID, gs_workspace: "tjwater_next", status: "active" }],
          total: 1,
          limit: 1000,
          offset: 0
        })
      });
      return;
    }
    if (url.pathname === "/api/v1/scada-devices") {
      await route.fulfill({
        contentType: "application/json",
        headers: corsHeaders,
        body: JSON.stringify({ items: devices, total: devices.length, limit: 1000, offset: 0 })
      });
      return;
    }
    if (url.pathname === "/api/v1/projects/current/metadata" && projectPresentation) {
      await route.fulfill({
        contentType: "application/json",
        headers: corsHeaders,
        body: JSON.stringify(projectPresentation.metadata)
      });
      return;
    }
    if (url.pathname === "/api/v1/access-context" && projectPresentation) {
      await route.fulfill({
        contentType: "application/json",
        headers: corsHeaders,
        body: JSON.stringify(projectPresentation.accessContext)
      });
      return;
    }
    if (url.pathname === "/api/v1/timeseries/scada-readings") {
      await route.fulfill({
        contentType: "application/json",
        headers: corsHeaders,
        body: JSON.stringify(readings)
      });
      return;
    }
    if (url.pathname === "/api/v1/workbench/runtime") {
      await route.fulfill({
        contentType: "application/json",
        headers: corsHeaders,
        body: JSON.stringify(runtimeSnapshot)
      });
      return;
    }
    if (url.pathname === "/api/v1/workbench/sync-snapshot") {
      await route.fulfill({
        contentType: "application/json",
        headers: corsHeaders,
        body: JSON.stringify({
          schema: "workbench-sync-snapshot@1",
          event_cursor: 0,
          runtime: runtimeSnapshot,
          tasks: [],
          notifications: [],
          generated_at: "2026-09-17T02:30:00Z"
        })
      });
      return;
    }
    if (url.pathname === "/api/v1/workbench/events") {
      await route.fulfill({
        contentType: "text/event-stream",
        headers: { ...corsHeaders, "Cache-Control": "no-cache" },
        body: ": test keepalive\n\n"
      });
      return;
    }
    if (url.pathname === "/api/v1/workbench/analysis-runs") {
      const limit = Number(url.searchParams.get("limit") ?? 10);
      const offset = Number(url.searchParams.get("offset") ?? 0);
      const items = analysisHistory.slice(offset, offset + limit);
      await route.fulfill({
        contentType: "application/json",
        headers: corsHeaders,
        body: JSON.stringify({
          items,
          limit,
          offset,
          next_offset: offset + limit < analysisHistory.length ? offset + limit : null
        })
      });
      return;
    }
    const analysisRunMatch = url.pathname.match(/^\/api\/v1\/workbench\/analysis-runs\/([^/]+)$/);
    if (analysisRunMatch) {
      const runId = decodeURIComponent(analysisRunMatch[1]);
      const analysisRun = analysisRuns[runId];
      if (analysisRun) {
        await route.fulfill({
          contentType: "application/json",
          headers: corsHeaders,
          body: JSON.stringify(analysisRun)
        });
      } else {
        await route.fulfill({
          status: 404,
          contentType: "application/json",
          headers: corsHeaders,
          body: JSON.stringify({ detail: "Analysis run not found" })
        });
      }
      return;
    }
    await route.fulfill({
      status: 404,
      contentType: "application/json",
      headers: corsHeaders,
      body: "{}"
    });
  });
}