const { describe, it, expect, beforeAll } = require('@jest/globals');
const TestRuntime = require('../src/runtime/test-runtime');
const ScriptRuntime = require('../src/runtime/script-runtime');
const AssertRuntime = require('../src/runtime/assert-runtime');
const Bru = require('../src/bru');
const VarsRuntime = require('../src/runtime/vars-runtime');
const { loader: quickJsLoader } = require('../src/sandbox/quickjs');

describe('runtime', () => {
  describe('test-runtime', () => {
    const baseRequest = {
      method: 'GET',
      url: 'http://localhost:3000/',
      headers: {},
      data: undefined
    };
    const baseResponse = {
      status: 200,
      statusText: 'OK',
      data: [
        {
          id: 1
        },
        {
          id: 2
        },
        {
          id: 3
        }
      ]
    };

    it('should wait async tests', async () => {
      const testFile = `
                await test('async test', ()=> {
                    return new Promise((resolve)=> {
                        setTimeout(()=> {resolve()},200)
                    })
                })
            `;

      const runtime = new TestRuntime({ runtime: 'nodevm' });
      const result = await runtime.runTests(
        testFile,
        { ...baseRequest },
        { ...baseResponse },
        {},
        {},
        '.',
        null,
        process.env
      );
      expect(result.results.map((el) => ({ description: el.description, status: el.status }))).toEqual([
        { description: 'async test', status: 'pass' }
      ]);
    });

    it('should have ajv and ajv-formats dependencies available', async () => {
      const testFile = `
                const Ajv = require('ajv');
                const addFormats = require("ajv-formats");
                const ajv = new Ajv();
                addFormats(ajv);
                
                const schema = {
                  type: 'string',
                  format: 'date-time'
                };
                
                const validate = ajv.compile(schema)
                
                test('format valid', () => {
                  const valid = validate(new Date().toISOString())
                  expect(valid).to.be.true;
                })
            `;

      const runtime = new TestRuntime({ runtime: 'nodevm' });
      const result = await runtime.runTests(
        testFile,
        { ...baseRequest },
        { ...baseResponse },
        {},
        {},
        '.',
        null,
        process.env
      );
      expect(result.results.map((el) => ({ description: el.description, status: el.status }))).toEqual([
        { description: 'format valid', status: 'pass' }
      ]);
    });
  });

  describe('script-runtime', () => {
    describe('run-request-script', () => {
      const baseRequest = {
        method: 'GET',
        url: 'http://localhost:3000/',
        headers: {},
        data: undefined
      };

      it('should have ajv and ajv-formats dependencies available', async () => {
        const script = `
                  const Ajv = require('ajv');
                  const addFormats = require("ajv-formats");
                  const ajv = new Ajv();
                  addFormats(ajv);
                  
                  const schema = {
                    type: 'string',
                    format: 'date-time'
                  };
                  
                  const validate = ajv.compile(schema)
                  
                  bru.setVar('validation', validate(new Date().toISOString()))
              `;

        const runtime = new ScriptRuntime({ runtime: 'nodevm' });
        const result = await runtime.runRequestScript(script, { ...baseRequest }, {}, {}, '.', null, process.env);
        expect(result.runtimeVariables.validation).toBeTruthy();
      });
    });

    describe('run-response-script', () => {
      const baseRequest = {
        method: 'GET',
        url: 'http://localhost:3000/',
        headers: {},
        data: undefined
      };
      const baseResponse = {
        status: 200,
        statusText: 'OK',
        data: [
          {
            id: 1
          },
          {
            id: 2
          },
          {
            id: 3
          }
        ]
      };

      it('should have ajv and ajv-formats dependencies available', async () => {
        const script = `
                  const Ajv = require('ajv');
                  const addFormats = require("ajv-formats");
                  const ajv = new Ajv();
                  addFormats(ajv);
                  
                  const schema = {
                    type: 'string',
                    format: 'date-time'
                  };
                  
                  const validate = ajv.compile(schema)
                  
                  bru.setVar('validation', validate(new Date().toISOString()))
              `;

        const runtime = new ScriptRuntime({ runtime: 'nodevm' });
        const result = await runtime.runResponseScript(
          script,
          { ...baseRequest },
          { ...baseResponse },
          {},
          {},
          '.',
          null,
          process.env
        );
        expect(result.runtimeVariables.validation).toBeTruthy();
      });
    });
  });

  describe('environment variables from scripts', () => {
    it('should allow any value type', async () => {
      const script = `
        bru.setEnvVar('str', 'hello');
        bru.setEnvVar('number', 42);
        bru.setEnvVar('boolean', true);
        bru.setEnvVar('object', {key: 'value'});
        bru.setEnvVar('array', [1, 2, 3]);
      `;
      const runtime = new ScriptRuntime({ runtime: 'nodevm' });

      const result = await runtime.runRequestScript(script, {}, {}, {}, '.', null, process.env);

      expect(result.envVariables.str).toBe('hello');
      expect(result.envVariables.number).toBe(42);
      expect(result.envVariables.boolean).toBe(true);
      expect(result.envVariables.object).toEqual({ key: 'value' });
      expect(result.envVariables.array).toEqual([1, 2, 3]);
    });

    it('should preserve typed values through the QuickJS shim', async () => {
      await quickJsLoader();
      const script = `
        bru.setEnvVar('num', 42);
        bru.setEnvVar('bool', true);
        bru.setEnvVar('obj', { key: 'value' });
        bru.setCollectionVar('collNum', 7);
        bru.setGlobalEnvVar('globalBool', false);
      `;
      const runtime = new ScriptRuntime({ runtime: 'quickjs' });
      const onConsoleLog = () => {};

      const result = await runtime.runRequestScript(script, {}, {}, {}, '.', onConsoleLog, process.env);

      expect(typeof result.envVariables.num).toBe('number');
      expect(result.envVariables.num).toBe(42);
      expect(typeof result.envVariables.bool).toBe('boolean');
      expect(result.envVariables.bool).toBe(true);
      expect(typeof result.envVariables.obj).toBe('object');
      expect(result.envVariables.obj).toEqual({ key: 'value' });
      expect(typeof result.collectionVariables.collNum).toBe('number');
      expect(result.collectionVariables.collNum).toBe(7);
      expect(typeof result.globalEnvironmentVariables.globalBool).toBe('boolean');
      expect(result.globalEnvironmentVariables.globalBool).toBe(false);
    });

    it('should return null for scopes the script did not touch (dirty-flag gating)', async () => {
      const script = `bru.setEnvVar('only_env', 'val');`;
      const runtime = new ScriptRuntime({ runtime: 'nodevm' });

      const result = await runtime.runRequestScript(script, {}, {}, {}, '.', null, process.env);

      expect(result.envVariables).not.toBeNull();
      expect(result.envVariables.only_env).toBe('val');
      expect(result.collectionVariables).toBeNull();
      expect(result.globalEnvironmentVariables).toBeNull();
    });

    it('should return null for scopes the script did not touch — QuickJS parity', async () => {
      await quickJsLoader();
      const script = `bru.setEnvVar('only_env', 'val');`;
      const runtime = new ScriptRuntime({ runtime: 'quickjs' });
      const onConsoleLog = () => {};

      const result = await runtime.runRequestScript(script, {}, {}, {}, '.', onConsoleLog, process.env);

      expect(result.envVariables).not.toBeNull();
      expect(result.envVariables.only_env).toBe('val');
      expect(result.collectionVariables).toBeNull();
      expect(result.globalEnvironmentVariables).toBeNull();
    });

    it('should not include persistentEnvVariables in result', async () => {
      const script = `bru.setEnvVar('key', 'val');`;
      const runtime = new ScriptRuntime({ runtime: 'nodevm' });

      const result = await runtime.runRequestScript(script, {}, {}, {}, '.', null, process.env);

      expect(result).not.toHaveProperty('persistentEnvVariables');
    });

    it('should include collectionVariables in result', async () => {
      const script = `bru.setCollectionVar('myVar', 'myValue');`;
      const runtime = new ScriptRuntime({ runtime: 'nodevm' });

      const result = await runtime.runRequestScript(script, {}, {}, {}, '.', null, process.env);

      expect(result.collectionVariables).toBeDefined();
      expect(result.collectionVariables.myVar).toBe('myValue');
    });

    it('should silently ignore old persist flag as extra argument', async () => {
      const scriptTrue = `bru.setEnvVar('key1', 'val1', { persist: true });`;
      const scriptFalse = `bru.setEnvVar('key2', 'val2', { persist: false });`;
      const runtime = new ScriptRuntime({ runtime: 'nodevm' });

      const result1 = await runtime.runRequestScript(scriptTrue, {}, {}, {}, '.', null, process.env);
      expect(result1.envVariables.key1).toBe('val1');

      const result2 = await runtime.runRequestScript(scriptFalse, {}, {}, {}, '.', null, process.env);
      expect(result2.envVariables.key2).toBe('val2');
    });

    it('should silently ignore old persist flag as extra argument — QuickJS parity', async () => {
      await quickJsLoader();
      const scriptTrue = `bru.setEnvVar('key1', 'val1', { persist: true });`;
      const scriptFalse = `bru.setEnvVar('key2', 'val2', { persist: false });`;
      const runtime = new ScriptRuntime({ runtime: 'quickjs' });
      const onConsoleLog = () => {};

      const result1 = await runtime.runRequestScript(scriptTrue, {}, {}, {}, '.', onConsoleLog, process.env);
      expect(result1.envVariables.key1).toBe('val1');

      const result2 = await runtime.runRequestScript(scriptFalse, {}, {}, {}, '.', onConsoleLog, process.env);
      expect(result2.envVariables.key2).toBe('val2');
    });
  });

  describe('bru.setVar random variable', () => {
    it('should be able to set random variables as values', async () => {
      const script = `bru.setVar('title', '{{$randomFirstName}}')`;

      const runtime = new ScriptRuntime({ runtime: 'nodevm' });

      const result = await runtime.runRequestScript(script, {}, {}, {}, '.', null, process.env);

      expect(result.runtimeVariables.title).toBe('{{$randomFirstName}}');
    });
  });

  describe('assert-runtime', () => {
    beforeAll(async () => {
      await quickJsLoader();
    });

    const baseRequest = {
      method: 'GET',
      url: 'http://localhost:3000/',
      headers: {},
      data: undefined
    };

    const makeResponse = (data) => ({
      status: 200,
      statusText: 'OK',
      data,
      headers: {}
    });

    const runAssertions = (assertions, response, runtime = 'nodevm', runtimeVariables = {}) => {
      const assertRuntime = new AssertRuntime({ runtime });
      return assertRuntime.runAssertions(assertions, { ...baseRequest }, response, {}, runtimeVariables, process.env);
    };

    // Ensures each QuickJS evaluation gets a fresh context
    describe('quickjs context isolation across iterations', () => {
      const ITERATION_COUNT = 350;

      it('should return correct res.status on every iteration', () => {
        for (let i = 0; i < ITERATION_COUNT; i++) {
          const status = 200 + i;
          const results = runAssertions(
            [{ name: 'res.status', value: `eq ${status}`, enabled: true }],
            { status, statusText: 'OK', data: {}, headers: {} },
            'quickjs'
          );
          expect(results[0].status).toBe('pass');
        }
      });

      it('should return correct res.body values on every iteration', () => {
        for (let i = 0; i < ITERATION_COUNT; i++) {
          const results = runAssertions(
            [{ name: 'res.body.id', value: `eq ${i}`, enabled: true }],
            { status: 200, statusText: 'OK', data: { id: i }, headers: {} },
            'quickjs'
          );
          expect(results[0].status).toBe('pass');
        }
      });

      it('should not return stale data from a previous iteration', () => {
        // First call with status 200
        runAssertions(
          [{ name: 'res.status', value: 'eq 200', enabled: true }],
          { status: 200, statusText: 'OK', data: { token: 'bearer_abc' }, headers: { authorization: 'bearer xyz' } },
          'quickjs'
        );

        // Second call with status 404 — must not return 200 or any data from previous call
        const results = runAssertions(
          [
            { name: 'res.status', value: 'eq 404', enabled: true },
            { name: 'res.body.error', value: 'eq not_found', enabled: true }
          ],
          { status: 404, statusText: 'Not Found', data: { error: 'not_found' }, headers: {} },
          'quickjs'
        );

        expect(results[0].status).toBe('pass');
        expect(results[1].status).toBe('pass');
      });

      it('should not persist runtime variables from a previous call', () => {
        // First call with runtime variable token = "one"
        const results1 = runAssertions(
          [{ name: 'token', value: 'eq one', enabled: true }],
          { status: 200, statusText: 'OK', data: {}, headers: {} },
          'quickjs',
          { token: 'one' }
        );
        expect(results1[0].status).toBe('pass');

        // Second call without token
        const results2 = runAssertions(
          [{ name: 'token', value: 'eq one', enabled: true }],
          { status: 200, statusText: 'OK', data: {}, headers: {} },
          'quickjs'
        );
        // Must fail — token should not exist in a fresh context
        expect(results2[0].status).toBe('fail');
      });
    });

    describe('isJson', () => {
      it('should pass for a plain object', () => {
        const results = runAssertions(
          [{ name: 'res.body', value: 'isJson', enabled: true }],
          makeResponse({ id: 1, name: 'test' })
        );
        expect(results[0].status).toBe('pass');
      });

      it('should pass for a nested object', () => {
        const results = runAssertions(
          [{ name: 'res.body', value: 'isJson', enabled: true }],
          makeResponse({ user: { id: 1, tags: ['a', 'b'] } })
        );
        expect(results[0].status).toBe('pass');
      });

      it('should pass for objects from a different realm (e.g. after res.setBody in node-vm)', async () => {
        const response = makeResponse({ id: 1, name: 'original' });

        // res.setBody() inside node-vm creates a cross-realm object whose
        // constructor is the VM's Object, not the host's Object
        const scriptRuntime = new ScriptRuntime({ runtime: 'nodevm' });
        await scriptRuntime.runResponseScript(
          `res.setBody({ id: 2, name: 'updated' });`,
          { ...baseRequest },
          response,
          {}, {}, '.', null, process.env
        );

        const results = runAssertions(
          [{ name: 'res.body', value: 'isJson', enabled: true }],
          response
        );
        expect(results[0].status).toBe('pass');
      });

      it('should pass for an array', () => {
        const results = runAssertions(
          [{ name: 'res.body', value: 'isJson', enabled: true }],
          makeResponse([1, 2, 3])
        );
        expect(results[0].status).toBe('pass');
      });

      it('should pass for an array of strings', () => {
        const results = runAssertions(
          [{ name: 'res.body', value: 'isJson', enabled: true }],
          makeResponse(['A55001213ZX0A'])
        );
        expect(results[0].status).toBe('pass');
      });

      it('should pass for an empty array', () => {
        const results = runAssertions(
          [{ name: 'res.body', value: 'isJson', enabled: true }],
          makeResponse([])
        );
        expect(results[0].status).toBe('pass');
      });

      it('should pass for an array of objects', () => {
        const results = runAssertions(
          [{ name: 'res.body', value: 'isJson', enabled: true }],
          makeResponse([{ id: 1 }, { id: 2 }])
        );
        expect(results[0].status).toBe('pass');
      });

      it('should fail for a string', () => {
        const results = runAssertions(
          [{ name: 'res.body', value: 'isJson', enabled: true }],
          makeResponse('hello')
        );
        expect(results[0].status).toBe('fail');
      });

      it('should fail for null', () => {
        const results = runAssertions(
          [{ name: 'res.body', value: 'isJson', enabled: true }],
          makeResponse(null)
        );
        expect(results[0].status).toBe('fail');
      });
    });

    describe('jsonSchema', () => {
      const chai = require('chai');

      it('should pass when body matches a valid schema', () => {
        const body = { name: 'John', age: 30 };
        const schema = {
          type: 'object',
          properties: {
            name: { type: 'string' },
            age: { type: 'number' }
          },
          required: ['name', 'age']
        };
        chai.expect(body).to.have.jsonSchema(schema);
      });

      it('should fail when body has a type mismatch', () => {
        const body = { name: 'John', age: 'thirty' };
        const schema = {
          type: 'object',
          properties: {
            name: { type: 'string' },
            age: { type: 'number' }
          },
          required: ['name', 'age']
        };
        expect(() => chai.expect(body).to.have.jsonSchema(schema)).toThrow(/validation errors/);
      });

      it('should fail when a required field is missing', () => {
        const body = { name: 'John' };
        const schema = {
          type: 'object',
          properties: {
            name: { type: 'string' },
            age: { type: 'number' }
          },
          required: ['name', 'age']
        };
        expect(() => chai.expect(body).to.have.jsonSchema(schema)).toThrow(/validation errors/);
      });

      it('should pass with custom ajvOptions', () => {
        const body = { name: 'John', age: 30 };
        const schema = {
          type: 'object',
          properties: {
            name: { type: 'string' },
            age: { type: 'number' }
          },
          required: ['name', 'age']
        };
        chai.expect(body).to.have.jsonSchema(schema, { allErrors: false });
      });

      it('should support negation with .not', () => {
        const body = { name: 'John' };
        const schema = { type: 'array' };
        chai.expect(body).to.not.have.jsonSchema(schema);
      });

      it('should throw a clear error for unsupported Draft 2020-12 $schema', () => {
        const body = { name: 'John' };
        const schema = {
          $schema: 'https://json-schema.org/draft/2020-12/schema',
          type: 'object',
          properties: { name: { type: 'string' } }
        };
        expect(() => chai.expect(body).to.have.jsonSchema(schema)).toThrow(/Unsupported JSON Schema version.*2020-12.*only supports Draft-07/);
      });

      it('should throw a clear error for unsupported Draft 2019-09 $schema', () => {
        const body = { name: 'John' };
        const schema = {
          $schema: 'https://json-schema.org/draft/2019-09/schema',
          type: 'object',
          properties: { name: { type: 'string' } }
        };
        expect(() => chai.expect(body).to.have.jsonSchema(schema)).toThrow(/Unsupported JSON Schema version.*2019-09.*only supports Draft-07/);
      });

      it('should allow explicit Draft-07 $schema', () => {
        const body = { name: 'John', age: 30 };
        const schema = {
          $schema: 'http://json-schema.org/draft-07/schema#',
          type: 'object',
          properties: {
            name: { type: 'string' },
            age: { type: 'number' }
          },
          required: ['name', 'age']
        };
        chai.expect(body).to.have.jsonSchema(schema);
      });
    });
  });
});