/**
 * End-to-end coverage of Spring @RequestMapping / @GetMapping route ingestion.
 *
 * This test verifies that the ingestion pipeline correctly:
 * 1. Extracts method-level route annotations (@GetMapping, @PostMapping, etc.)
 * 2. Joins class-level @RequestMapping prefix with method-level paths
 * 3. Handles both positional and named annotation arguments (path = "...", value = "...")
 * 4. Generates correct Route nodes without a class prefix when none exists
 *
 * The fixture lives at `test/fixtures/spring-route-app/`.
 */

import { describe, it, expect, beforeAll } from 'vitest';
import path from 'node:path';
import { runPipelineFromRepo } from '../../src/core/ingestion/pipeline.js';
import type { PipelineResult } from '../../src/types/pipeline.js';

const FIXTURE = path.resolve(__dirname, '..', 'fixtures', 'spring-route-app');

describe('Spring @RequestMapping route ingestion pipeline', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(FIXTURE, () => {}, {});
  }, 60_000);

  function routeNames(): string[] {
    const out: string[] = [];
    result.graph.forEachNode((n) => {
      if (n.label === 'Route') out.push(String(n.properties.name));
    });
    return out.sort();
  }

  it('joins class-level @RequestMapping prefix with method-level @GetMapping/@PostMapping', () => {
    const names = routeNames();
    // UserController: @RequestMapping("/api/users") + @GetMapping("/list")
    expect(names).toContain('/api/users/list');
    // UserController: @RequestMapping("/api/users") + @PostMapping("/create")
    expect(names).toContain('/api/users/create');
  });

  it('handles named annotation arguments (path = "..." and value = "...")', () => {
    const names = routeNames();
    // UserController: @DeleteMapping(path = "/delete")
    expect(names).toContain('/api/users/delete');
    // UserController: @PutMapping(value = "/update")
    expect(names).toContain('/api/users/update');
  });

  it('joins prefix for OrderController routes', () => {
    const names = routeNames();
    // OrderController: @RequestMapping("/api/orders") + @GetMapping("/list")
    expect(names).toContain('/api/orders/list');
    // OrderController: @RequestMapping("/api/orders") + @PostMapping("/submit")
    expect(names).toContain('/api/orders/submit');
  });

  it('emits bare paths when no class-level @RequestMapping exists', () => {
    const names = routeNames();
    // HealthController: no class prefix, @GetMapping("/health") and @GetMapping("/ready")
    expect(names).toContain('/health');
    expect(names).toContain('/ready');
  });

  it('does NOT emit class-level @RequestMapping as a standalone Route', () => {
    const names = routeNames();
    // The prefix "/api/users" alone must not become a Route node
    expect(names).not.toContain('/api/users');
    expect(names).not.toContain('/api/orders');
  });

  it('handles multiple classes in one file with independent prefixes', () => {
    const names = routeNames();
    // MultiController.java: AdminController @RequestMapping("/api/admin") + @GetMapping("/dashboard")
    expect(names).toContain('/api/admin/dashboard');
    // MultiController.java: PublicController @RequestMapping("/api/public") + @GetMapping("/info")
    expect(names).toContain('/api/public/info');
    // Prefixes should not bleed between classes
    expect(names).not.toContain('/api/public/dashboard');
    expect(names).not.toContain('/api/admin/info');
  });

  it('supports @PatchMapping', () => {
    const names = routeNames();
    // MultiController.java: AdminController @PatchMapping("/settings")
    expect(names).toContain('/api/admin/settings');
  });

  it('emits wildcard and explicit method-level @RequestMapping routes', () => {
    const routes = new Set<string>();
    const handlerNames = new Set<string>();
    const handledLegacyRoutes = new Set<string>();
    result.graph.forEachNode((node) => {
      if (node.label !== 'Route') return;
      routes.add(`${String(node.properties.method)} ${String(node.properties.name)}`);
      if (node.properties.handlerSymbolId) {
        const handler = result.graph.getNode(String(node.properties.handlerSymbolId));
        if (handler) handlerNames.add(String(handler.properties.name));
      }
    });
    result.graph.forEachRelationship((relationship) => {
      if (relationship.type !== 'HANDLES_ROUTE') return;
      const file = result.graph.getNode(relationship.sourceId);
      const route = result.graph.getNode(relationship.targetId);
      if (
        file?.label === 'File' &&
        String(file.properties.name).includes('LegacyController.java') &&
        route?.label === 'Route'
      ) {
        handledLegacyRoutes.add(
          `${String(route.properties.method)} ${String(route.properties.name)}`,
        );
      }
    });

    const expectedRoutes = [
      '* /api/legacy/all',
      'POST /api/legacy/save',
      'GET /api/legacy/inspect',
      'HEAD /api/legacy/inspect',
    ];
    for (const route of expectedRoutes) {
      expect(routes).toContain(route);
      expect(handledLegacyRoutes).toContain(route);
    }
    for (const handlerName of ['allMethods', 'save', 'inspect']) {
      expect(handlerNames).toContain(handlerName);
    }
  });

  it('emits HANDLES_ROUTE edges linking Route nodes to their handler files', () => {
    const handlesRouteEdges: Array<{ routeName: string; filePath: string }> = [];
    result.graph.forEachRelationship((r) => {
      if (r.type !== 'HANDLES_ROUTE') return;
      const targetNode = result.graph.getNode(r.targetId);
      const sourceNode = result.graph.getNode(r.sourceId);
      if (targetNode?.label === 'Route' && sourceNode?.label === 'File') {
        handlesRouteEdges.push({
          routeName: String(targetNode.properties.name),
          filePath: String(sourceNode.properties.name),
        });
      }
    });
    // At least one route should be linked to the UserController file
    const userRoutes = handlesRouteEdges.filter((e) => e.filePath.includes('UserController.java'));
    expect(userRoutes.length).toBeGreaterThanOrEqual(1);
  });

  it('resolves the decorated handler method to a symbol UID on the Route node (Part 2 #2138)', () => {
    // Find the Route node for the @GetMapping("/list") handler.
    let routeNode: { properties: Record<string, unknown> } | undefined;
    result.graph.forEachNode((n) => {
      if (n.label === 'Route' && n.properties.name === '/api/users/list') {
        routeNode = n;
      }
    });
    expect(routeNode, 'Route node /api/users/list should exist').toBeTruthy();

    // U0+U1: the decorated handler (listUsers) was captured and resolved to a
    // real symbol UID, stamped on the Route node.
    const handlerSymbolId = routeNode!.properties.handlerSymbolId;
    expect(handlerSymbolId, 'Route node should carry handlerSymbolId').toBeTruthy();

    // The id resolves to the listUsers handler symbol in UserController.java.
    const handler = result.graph.getNode(String(handlerSymbolId));
    expect(handler, 'handlerSymbolId should resolve to a graph node').toBeTruthy();
    expect(handler!.properties.name).toBe('listUsers');
    expect(String(handler!.properties.filePath)).toContain('UserController.java');
    expect(['Method', 'Function']).toContain(handler!.label);
  });
});