/**
 * JavaScript: self/this resolution, parent resolution, super resolution
 */
import { describe, it, expect, beforeAll } from 'vitest';
import path from 'path';
import {
  FIXTURES,
  CROSS_FILE_FIXTURES,
  getRelationships,
  getNodesByLabel,
  getNodesByLabelFull,
  edgeSet,
  runPipelineFromRepo,
  type PipelineResult,
} from './helpers.js';

// ---------------------------------------------------------------------------
// Qualified (namespaced) base (#1951): `extends ns.Base` parses as a
// class_heritage holding a member_expression (object: `ns`, property: `Base`).
// An earlier synth (synthesizeJsInheritanceReferences) dropped member_expression
// bases, emitting only for a direct identifier base, so production silently
// omitted this EXTENDS edge. It is now resolved by the base's trailing
// property_identifier (`Base`), matching the documented per-shape reduction.
// `Plain extends Base` is the bare control (its simple-base handling is
// unchanged). Scope-resolution owns these edges since #942.
// ---------------------------------------------------------------------------

describe('JavaScript qualified-base heritage resolution (#1951)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'javascript-qualified-base'), () => {});
  }, 60000);

  it('emits EXTENDS for the qualified base (ns.Base) and the bare control (Base)', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    expect(edgeSet(extends_)).toEqual(['Plain → Base', 'Service → Base']);
  });
});

// ---------------------------------------------------------------------------
// skipGraphPhases: verify pipeline works correctly when graph phases are skipped
// ---------------------------------------------------------------------------

describe('Pipeline skipGraphPhases option', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'javascript-self-this-resolution'),
      () => {},
      { skipGraphPhases: true },
    );
  }, 60000);

  it('produces graph nodes without community/process phases', () => {
    expect(getNodesByLabel(result, 'Class').length).toBeGreaterThan(0);
  });

  it('still resolves CALLS edges correctly', () => {
    const calls = getRelationships(result, 'CALLS');
    expect(calls.length).toBeGreaterThan(0);
  });

  it('omits communityResult when skipGraphPhases is true', () => {
    expect(result.communityResult).toBeUndefined();
  });

  it('omits processResult when skipGraphPhases is true', () => {
    expect(result.processResult).toBeUndefined();
  });
});

// ---------------------------------------------------------------------------
// this.save() resolves to enclosing class's own save method
// ---------------------------------------------------------------------------

describe('JavaScript this resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'javascript-self-this-resolution'),
      () => {},
    );
  }, 60000);

  it('detects User and Repo classes, each with a save method', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['Repo', 'User']);
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('resolves this.save() inside User.process to User.save, not Repo.save', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find((c) => c.target === 'save' && c.source === 'process');
    expect(saveCall).toBeDefined();
    expect(saveCall!.targetFilePath).toBe('src/models/User.js');
  });
});

// ---------------------------------------------------------------------------
// Parent class resolution: EXTENDS edge
// ---------------------------------------------------------------------------

describe('JavaScript parent resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'javascript-parent-resolution'),
      () => {},
    );
  }, 60000);

  it('detects BaseModel and User classes', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['BaseModel', 'User']);
  });

  it('emits EXTENDS edge: User → BaseModel', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    expect(extends_.length).toBe(1);
    expect(extends_[0].source).toBe('User');
    expect(extends_[0].target).toBe('BaseModel');
  });

  it('EXTENDS edge points to real graph node', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    const target = result.graph.getNode(extends_[0].rel.targetId);
    expect(target).toBeDefined();
    expect(target!.properties.name).toBe('BaseModel');
  });
});

// ---------------------------------------------------------------------------
// Nullable receiver: JSDoc @param {User | null} strips nullable via TypeEnv
// ---------------------------------------------------------------------------

describe('JavaScript nullable receiver resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'js-nullable-receiver'), () => {});
  }, 60000);

  it('detects User and Repo classes, both with save methods', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['Repo', 'User']);
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('resolves user.save() to src/user.js via nullable-stripped JSDoc type', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processEntities' && c.targetFilePath === 'src/user.js',
    );
    expect(userSave).toBeDefined();
  });

  it('resolves repo.save() to src/repo.js via nullable-stripped JSDoc type', () => {
    const calls = getRelationships(result, 'CALLS');
    const repoSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processEntities' && c.targetFilePath === 'src/repo.js',
    );
    expect(repoSave).toBeDefined();
  });

  it('emits exactly 2 save() CALLS edges (one per receiver type)', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCalls = calls.filter((c) => c.target === 'save');
    expect(saveCalls.length).toBe(2);
  });

  it('each save() call resolves to a distinct file (no duplicates)', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCalls = calls.filter((c) => c.target === 'save' && c.source === 'processEntities');
    const files = saveCalls.map((c) => c.targetFilePath).sort();
    expect(files).toEqual(['src/repo.js', 'src/user.js']);
  });
});

// ---------------------------------------------------------------------------
// super.save() resolves to parent class's save method
// ---------------------------------------------------------------------------

describe('JavaScript super resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'javascript-super-resolution'),
      () => {},
    );
  }, 60000);

  it('detects BaseModel, User, and Repo classes, each with a save method', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['BaseModel', 'Repo', 'User']);
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(3);
  });

  it('emits EXTENDS edge: User → BaseModel', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    expect(extends_.length).toBe(1);
    expect(extends_[0].source).toBe('User');
    expect(extends_[0].target).toBe('BaseModel');
  });

  it('resolves super.save() inside User to BaseModel.save, not Repo.save', () => {
    const calls = getRelationships(result, 'CALLS');
    const superSave = calls.find(
      (c) =>
        c.source === 'save' && c.target === 'save' && c.targetFilePath === 'src/models/Base.js',
    );
    expect(superSave).toBeDefined();
    const repoSave = calls.find(
      (c) => c.target === 'save' && c.targetFilePath === 'src/models/Repo.js',
    );
    expect(repoSave).toBeUndefined();
  });
});

// ---------------------------------------------------------------------------
// Chained method calls: svc.getUser().save()
// Tests that JavaScript chain call resolution correctly infers the intermediate
// receiver type from getUser()'s JSDoc @returns {User} and resolves save().
// ---------------------------------------------------------------------------

describe('JavaScript chained method call resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'javascript-chain-call'), () => {});
  }, 60000);

  it('detects User and Repo classes, and UserService', () => {
    const classes = getNodesByLabel(result, 'Class');
    expect(classes).toContain('User');
    expect(classes).toContain('Repo');
    expect(classes).toContain('UserService');
  });

  it('detects getUser and save methods', () => {
    const methods = getNodesByLabel(result, 'Method');
    expect(methods).toContain('getUser');
    expect(methods).toContain('save');
  });

  it('resolves svc.getUser().save() to User#save via chain resolution', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processUser' && c.targetFilePath?.includes('user.js'),
    );
    expect(userSave).toBeDefined();
  });

  it('does NOT resolve svc.getUser().save() to Repo#save', () => {
    const calls = getRelationships(result, 'CALLS');
    const repoSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processUser' && c.targetFilePath?.includes('repo.js'),
    );
    expect(repoSave).toBeUndefined();
  });
});

// ---------------------------------------------------------------------------
// Phase 8: Field/property type resolution — class field_definition capture
// ---------------------------------------------------------------------------

describe('Field type resolution (JavaScript)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'js-field-types'), () => {});
  }, 60000);

  it('detects classes: Address, Config, User', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['Address', 'Config', 'User']);
  });

  it('detects Property nodes for JS class fields', () => {
    const properties = getNodesByLabel(result, 'Property');
    expect(properties).toContain('address');
    expect(properties).toContain('name');
    expect(properties).toContain('city');
  });

  it('emits HAS_PROPERTY edges linking fields to classes', () => {
    const propEdges = getRelationships(result, 'HAS_PROPERTY');
    expect(propEdges.length).toBe(4);
    expect(edgeSet(propEdges)).toContain('User → address');
    expect(edgeSet(propEdges)).toContain('User → name');
    expect(edgeSet(propEdges)).toContain('Address → city');
    expect(edgeSet(propEdges)).toContain('Config → DEFAULT');
  });

  it('populates field metadata (visibility, isStatic, isReadonly) on Property nodes', () => {
    const properties = getNodesByLabelFull(result, 'Property');

    const city = properties.find((p) => p.name === 'city');
    expect(city).toBeDefined();
    expect(city!.properties.visibility).toBe('public');
    expect(city!.properties.isStatic).toBe(false);
    expect(city!.properties.isReadonly).toBe(false);

    const addr = properties.find((p) => p.name === 'address');
    expect(addr).toBeDefined();
    expect(addr!.properties.visibility).toBe('public');
    expect(addr!.properties.isStatic).toBe(false);
    expect(addr!.properties.isReadonly).toBe(false);
  });

  it('marks Config.DEFAULT as static', () => {
    const properties = getNodesByLabelFull(result, 'Property');
    const def = properties.find((p) => p.name === 'DEFAULT');
    expect(def).toBeDefined();
    expect(def!.properties.isStatic).toBe(true);
    expect(def!.properties.visibility).toBe('public');
  });
});

// ACCESSES write edges from assignment expressions
// ---------------------------------------------------------------------------

describe('Write access tracking (JavaScript)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'js-write-access'), () => {});
  }, 60000);

  it('emits ACCESSES write edges for field assignments', () => {
    const accesses = getRelationships(result, 'ACCESSES');
    const writes = accesses.filter((e) => e.rel.reason === 'write');
    expect(writes.length).toBe(2);
    const fieldNames = writes.map((e) => e.target);
    expect(fieldNames).toContain('name');
    expect(fieldNames).toContain('address');
    const sources = writes.map((e) => e.source);
    expect(sources).toContain('updateUser');
  });

  it('write ACCESSES edges have confidence 1.0', () => {
    const accesses = getRelationships(result, 'ACCESSES');
    const writes = accesses.filter((e) => e.rel.reason === 'write');
    for (const edge of writes) {
      expect(edge.rel.confidence).toBe(1.0);
    }
  });
});

// ---------------------------------------------------------------------------
// Phase A: JS object destructuring — const { field } = receiver → fieldAccess PendingAssignment
// ---------------------------------------------------------------------------

describe('JavaScript object destructuring resolution (Phase A)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'js-object-destructuring'), () => {});
  }, 60000);

  it('detects User, Address classes', () => {
    const classes = getNodesByLabel(result, 'Class');
    expect(classes).toContain('User');
    expect(classes).toContain('Address');
  });

  it('resolves address.save() to Address#save via object destructuring', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find((c) => c.target === 'save' && c.targetFilePath.includes('models'));
    expect(saveCall).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Phase A: Post-fixpoint for-loop replay — iterable resolved via callResult fixpoint
// ---------------------------------------------------------------------------

describe('JavaScript post-fixpoint for-loop replay (Phase A ex-9B)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'js-fixpoint-for-loop'), () => {});
  }, 60000);

  it('resolves u.save() to User#save via post-fixpoint for-loop replay', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find(
      (c) => c.target === 'save' && c.source === 'process' && c.targetFilePath.includes('models'),
    );
    expect(saveCall).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Phase 14: Cross-file binding propagation
// models.js exports getUser() returning User
// app.js imports getUser, calls const u = getUser(); u.save(); u.getName()
// → u is typed User via cross-file return type propagation
// ---------------------------------------------------------------------------

describe('JavaScript cross-file binding propagation', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(CROSS_FILE_FIXTURES, 'js-cross-file'), () => {});
  }, 60000);

  it('detects User class with save and getName methods', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Method')).toContain('save');
    expect(getNodesByLabel(result, 'Method')).toContain('getName');
  });

  it('detects getUser and run functions', () => {
    expect(getNodesByLabel(result, 'Function')).toContain('getUser');
    expect(getNodesByLabel(result, 'Function')).toContain('run');
  });

  it('emits IMPORTS edge from app.js to models.js', () => {
    const imports = getRelationships(result, 'IMPORTS');
    const edge = imports.find(
      (e) => e.sourceFilePath.includes('app') && e.targetFilePath.includes('models'),
    );
    expect(edge).toBeDefined();
  });

  it('resolves u.save() in run() to User#save via cross-file return type propagation', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find(
      (c) => c.target === 'save' && c.source === 'run' && c.targetFilePath.includes('models'),
    );
    expect(saveCall).toBeDefined();
  });

  it('resolves u.getName() in run() to User#getName via cross-file return type propagation', () => {
    const calls = getRelationships(result, 'CALLS');
    const getNameCall = calls.find(
      (c) => c.target === 'getName' && c.source === 'run' && c.targetFilePath.includes('models'),
    );
    expect(getNameCall).toBeDefined();
  });

  it('emits HAS_METHOD edges linking save and getName to User', () => {
    const hasMethod = getRelationships(result, 'HAS_METHOD');
    const saveEdge = hasMethod.find((e) => e.source === 'User' && e.target === 'save');
    const getNameEdge = hasMethod.find((e) => e.source === 'User' && e.target === 'getName');
    expect(saveEdge).toBeDefined();
    expect(getNameEdge).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Method enrichment: static, parameterTypes (no abstract in JS)
// ---------------------------------------------------------------------------

describe('JavaScript method enrichment', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'javascript-method-enrichment'),
      () => {},
    );
  }, 60000);

  it('detects Animal and Dog classes', () => {
    const classes = getNodesByLabel(result, 'Class');
    expect(classes).toContain('Animal');
    expect(classes).toContain('Dog');
  });

  it('emits HAS_METHOD edges for Animal methods', () => {
    const hasMethod = getRelationships(result, 'HAS_METHOD');
    const animalMethods = hasMethod
      .filter((e) => e.source === 'Animal')
      .map((e) => e.target)
      .sort();
    expect(animalMethods).toContain('speak');
    expect(animalMethods).toContain('classify');
    expect(animalMethods).toContain('breathe');
  });

  it('emits HAS_METHOD edge for Dog.speak', () => {
    const hasMethod = getRelationships(result, 'HAS_METHOD');
    const dogSpeak = hasMethod.find((e) => e.source === 'Dog' && e.target === 'speak');
    expect(dogSpeak).toBeDefined();
  });

  it('emits EXTENDS edge Dog -> Animal', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    const dogExtends = extends_.find((e) => e.source === 'Dog' && e.target === 'Animal');
    expect(dogExtends).toBeDefined();
  });

  it('marks classify as isStatic (conditional)', () => {
    const methods = getNodesByLabelFull(result, 'Function');
    const classify = methods.find((n) => n.name === 'classify');
    if (classify?.properties.isStatic !== undefined) {
      expect(classify.properties.isStatic).toBe(true);
    }
  });

  it('marks breathe as NOT isStatic (conditional)', () => {
    const methods = getNodesByLabelFull(result, 'Function');
    const breathe = methods.find((n) => n.name === 'breathe');
    if (breathe?.properties.isStatic !== undefined) {
      expect(breathe.properties.isStatic).toBe(false);
    }
  });

  it('resolves dog.speak() CALLS edge', () => {
    const calls = getRelationships(result, 'CALLS');
    const speakCall = calls.find(
      (c) => c.target === 'speak' && c.sourceFilePath.includes('app.js'),
    );
    expect(speakCall).toBeDefined();
  });

  it('resolves Animal.classify("dog") static CALLS edge', () => {
    const calls = getRelationships(result, 'CALLS');
    const classifyCall = calls.find(
      (c) => c.target === 'classify' && c.sourceFilePath.includes('app.js'),
    );
    expect(classifyCall).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// SM-9: inherited method resolution — child.parentMethod() via first-wins walk
// ---------------------------------------------------------------------------

describe('JavaScript Child extends Parent — inherited method resolution (SM-9)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'javascript-child-extends-parent'),
      () => {},
    );
  }, 60000);

  it('detects Parent and Child classes', () => {
    const classes = getNodesByLabel(result, 'Class');
    expect(classes).toContain('Parent');
    expect(classes).toContain('Child');
  });

  it('emits EXTENDS edge: Child → Parent', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    expect(edgeSet(extends_)).toContain('Child → Parent');
  });

  it('resolves c.parentMethod() to Parent.parentMethod via first-wins MRO walk', () => {
    const calls = getRelationships(result, 'CALLS');
    const parentMethodCall = calls.find(
      (c) => c.target === 'parentMethod' && c.targetFilePath.includes('Parent.js'),
    );
    expect(parentMethodCall).toBeDefined();
    expect(parentMethodCall!.source).toBe('run');
  });
});

// ---------------------------------------------------------------------------
// Issue #1358: class-instance singleton (`export const x = new C()`)
// PR #1718 closed the object-literal-shorthand sub-case; this fixture covers
// the class-instance sub-case for JavaScript. Same resolution chain as TS but
// the receiver type comes from the `new ClassName()` initializer (no JSDoc
// annotation needed — the @type-binding.constructor capture handles it).
// ---------------------------------------------------------------------------

describe('JavaScript class-instance singleton resolution (issue #1358 sub-case)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'javascript-class-instance-singleton'),
      () => {},
      { skipGraphPhases: true },
    );
  }, 60000);

  it('detects FooService class, getUser method, caller function, fooService Const', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('FooService');
    expect(getNodesByLabel(result, 'Method')).toContain('getUser');
    expect(getNodesByLabel(result, 'Function')).toContain('caller');
    expect(getNodesByLabel(result, 'Const')).toContain('fooService');
  });

  it('emits HAS_METHOD edge from FooService to getUser', () => {
    const hasMethod = getRelationships(result, 'HAS_METHOD');
    const fromClass = hasMethod.filter((e) => e.source === 'FooService').map((e) => e.target);
    expect(fromClass).toEqual(['getUser']);
  });

  it('resolves caller.fooService.getUser() to FooService.getUser via constructor-inferred typeBinding', () => {
    const calls = getRelationships(result, 'CALLS');
    const projected = calls
      .filter((e) => e.source === 'caller' && e.target === 'getUser')
      .map((e) => ({
        targetFilePath: e.targetFilePath,
        reason: e.rel.reason,
        confidence: e.rel.confidence,
      }));

    expect(projected).toEqual([
      {
        targetFilePath: 'src/service.js',
        reason: 'import-resolved',
        confidence: 0.85,
      },
    ]);
  });
});

// ---------------------------------------------------------------------------
// Issue #1358: factory-pattern singleton (`export const x = makeC()`)
// Tests the @type-binding.alias chain-follow for JS — fooService aliases the
// return of makeFooService(), whose JSDoc @returns {FooService} ties the chain
// back to the class. Resolution propagates cross-file via
// propagateImportedReturnTypes followChainPostFinalize.
// ---------------------------------------------------------------------------

describe('JavaScript factory-pattern singleton resolution (issue #1358 sub-case)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'javascript-factory-singleton'),
      () => {},
      { skipGraphPhases: true },
    );
  }, 60000);

  it('detects FooService class, makeFooService function, fooService Const, caller function', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('FooService');
    expect(getNodesByLabel(result, 'Function')).toContain('makeFooService');
    expect(getNodesByLabel(result, 'Function')).toContain('caller');
    expect(getNodesByLabel(result, 'Const')).toContain('fooService');
  });

  it('resolves caller.fooService.getUser() through the factory chain to FooService.getUser', () => {
    const calls = getRelationships(result, 'CALLS');
    const projected = calls
      .filter((e) => e.source === 'caller' && e.target === 'getUser')
      .map((e) => ({
        targetFilePath: e.targetFilePath,
        reason: e.rel.reason,
        confidence: e.rel.confidence,
      }));

    expect(projected).toEqual([
      {
        targetFilePath: 'src/service.js',
        reason: 'import-resolved',
        confidence: 0.85,
      },
    ]);
  });
});
