import { describe, it, expect, vi, beforeEach } from 'vitest';
import { FloorplanImporter } from '../src/floorplan-import.js';

// Minimal renderer mock
function makeRenderer() {
  const listeners = {};
  return {
    houseData: null,
    currentFloor: 0,
    container: {
      dispatchEvent: vi.fn(),
      addEventListener: (type, fn) => {
        listeners[type] = listeners[type] || [];
        listeners[type].push(fn);
      },
      _listeners: listeners
    },
    _clearFloor: vi.fn(),
    _renderRoom: vi.fn(),
    showFloor: vi.fn()
  };
}

// Valid house data for testing
function makeSampleHouse() {
  return {
    name: 'Test House',
    description: 'A test house',
    units: 'meters',
    building: {
      footprint: { width: 10, depth: 8 },
      wallThickness: 0.24,
      roofType: 'gable'
    },
    floors: [{
      id: 'eg',
      name: 'Ground Floor',
      nameEN: 'Ground Floor',
      level: 0,
      ceilingHeight: 2.6,
      rooms: [
        {
          id: 'eg-living',
          name: 'Living Room',
          nameEN: 'Living Room',
          type: 'living',
          position: { x: 0, y: 0 },
          dimensions: { width: 5, length: 4 },
          flooring: 'hardwood',
          walls: {
            south: { type: 'exterior', doors: [], windows: [] },
            north: { type: 'interior', doors: [{ id: 'eg-living-d1', type: 'interior', position: 1, width: 0.9, height: 2.1, connectsTo: 'eg-kitchen' }], windows: [] },
            east: { type: 'interior', doors: [], windows: [] },
            west: { type: 'exterior', doors: [], windows: [{ id: 'eg-living-w1', type: 'casement', position: 1.5, width: 1.2, height: 1.2, sillHeight: 0.9 }] }
          }
        },
        {
          id: 'eg-kitchen',
          name: 'Kitchen',
          nameEN: 'Kitchen',
          type: 'kitchen',
          position: { x: 0, y: 4 },
          dimensions: { width: 5, length: 4 },
          flooring: 'tile',
          walls: {
            south: { type: 'interior', doors: [], windows: [] },
            north: { type: 'exterior', doors: [], windows: [] },
            east: { type: 'interior', doors: [], windows: [] },
            west: { type: 'exterior', doors: [], windows: [] }
          }
        }
      ]
    }]
  };
}

describe('FloorplanImporter', () => {
  let renderer;
  let importer;

  beforeEach(() => {
    renderer = makeRenderer();
    importer = new FloorplanImporter(renderer);
  });

  describe('_validateHouseJSON', () => {
    it('validates correct house data', () => {
      const result = importer._validateHouseJSON(makeSampleHouse());
      expect(result.valid).toBe(true);
      expect(result.errors).toHaveLength(0);
    });

    it('catches missing name', () => {
      const data = makeSampleHouse();
      delete data.name;
      const result = importer._validateHouseJSON(data);
      expect(result.valid).toBe(false);
      expect(result.errors).toContain('Missing building name');
    });

    it('catches missing building footprint', () => {
      const data = makeSampleHouse();
      delete data.building.footprint;
      const result = importer._validateHouseJSON(data);
      expect(result.valid).toBe(false);
      expect(result.errors).toContain('Missing building footprint');
    });

    it('catches missing floors', () => {
      const data = makeSampleHouse();
      data.floors = [];
      const result = importer._validateHouseJSON(data);
      expect(result.valid).toBe(false);
      expect(result.errors).toContain('No floors found');
    });

    it('catches rooms with missing walls', () => {
      const data = makeSampleHouse();
      delete data.floors[0].rooms[0].walls;
      const result = importer._validateHouseJSON(data);
      expect(result.valid).toBe(false);
      expect(result.errors).toContain('Room "eg-living" missing walls');
    });

    it('catches invalid wall type', () => {
      const data = makeSampleHouse();
      data.floors[0].rooms[0].walls.south.type = 'concrete';
      const result = importer._validateHouseJSON(data);
      expect(result.valid).toBe(false);
      expect(result.errors.some(e => e.includes('invalid type'))).toBe(true);
    });
  });

  describe('_autoRepair', () => {
    it('adds missing name', () => {
      const data = { floors: [{ rooms: [] }] };
      const repaired = importer._autoRepair(data);
      expect(repaired.name).toBe('Imported Floor Plan');
    });

    it('adds missing units', () => {
      const data = { floors: [] };
      const repaired = importer._autoRepair(data);
      expect(repaired.units).toBe('meters');
    });

    it('converts string numbers to floats', () => {
      const data = {
        floors: [{
          rooms: [{
            id: 'test',
            position: { x: '3.5', y: '2.0' },
            dimensions: { width: '4', length: '5.5' },
            walls: {
              north: { type: 'exterior', doors: [], windows: [] },
              south: { type: 'exterior', doors: [], windows: [] },
              east: { type: 'interior', doors: [], windows: [] },
              west: { type: 'interior', doors: [], windows: [] }
            }
          }]
        }]
      };
      const repaired = importer._autoRepair(data);
      const room = repaired.floors[0].rooms[0];
      expect(room.position.x).toBe(3.5);
      expect(room.position.y).toBe(2.0);
      expect(room.dimensions.width).toBe(4);
      expect(room.dimensions.length).toBe(5.5);
    });

    it('generates missing IDs', () => {
      const data = {
        floors: [{
          id: 'eg',
          rooms: [{
            nameEN: 'Living Room',
            position: { x: 0, y: 0 },
            dimensions: { width: 4, length: 4 },
            walls: {}
          }]
        }]
      };
      const repaired = importer._autoRepair(data);
      expect(repaired.floors[0].rooms[0].id).toBe('eg-living-room');
    });

    it('infers flooring from room type', () => {
      const data = {
        floors: [{
          id: 'eg',
          rooms: [
            { id: 'eg-k', type: 'kitchen', position: { x: 0, y: 0 }, dimensions: { width: 3, length: 3 }, walls: {} },
            { id: 'eg-b', type: 'bedroom', position: { x: 3, y: 0 }, dimensions: { width: 3, length: 3 }, walls: {} }
          ]
        }]
      };
      const repaired = importer._autoRepair(data);
      expect(repaired.floors[0].rooms[0].flooring).toBe('tile');
      expect(repaired.floors[0].rooms[1].flooring).toBe('hardwood');
    });

    it('adds missing walls', () => {
      const data = {
        floors: [{
          rooms: [{
            id: 'test',
            position: { x: 0, y: 0 },
            dimensions: { width: 3, length: 3 }
          }]
        }]
      };
      const repaired = importer._autoRepair(data);
      const room = repaired.floors[0].rooms[0];
      expect(room.walls.north).toBeDefined();
      expect(room.walls.south).toBeDefined();
      expect(room.walls.east).toBeDefined();
      expect(room.walls.west).toBeDefined();
      expect(room.walls.north.type).toBe('interior');
    });

    it('computes footprint from rooms when missing', () => {
      const data = {
        floors: [{
          rooms: [
            { id: 'r1', position: { x: 0, y: 0 }, dimensions: { width: 5, length: 4 }, walls: {} },
            { id: 'r2', position: { x: 5, y: 0 }, dimensions: { width: 3, length: 4 }, walls: {} }
          ]
        }]
      };
      const repaired = importer._autoRepair(data);
      expect(repaired.building.footprint.width).toBe(8);
      expect(repaired.building.footprint.depth).toBe(4);
    });
  });

  describe('_applyToRenderer', () => {
    it('sets house data on renderer', () => {
      const data = makeSampleHouse();
      importer._applyToRenderer(data);
      expect(renderer.houseData).toBe(data);
      expect(renderer.currentFloor).toBe(0);
    });

    it('clears and renders floor', () => {
      const data = makeSampleHouse();
      importer._applyToRenderer(data);
      expect(renderer._clearFloor).toHaveBeenCalled();
      expect(renderer._renderRoom).toHaveBeenCalledTimes(2);
    });

    it('dispatches houseloaded event', () => {
      const data = makeSampleHouse();
      importer._applyToRenderer(data);
      expect(renderer.container.dispatchEvent).toHaveBeenCalledWith(
        expect.objectContaining({
          type: 'houseloaded',
          detail: { name: 'Test House', floors: 1 }
        })
      );
    });

    it('calls onHouseLoaded callback', () => {
      const callback = vi.fn();
      const importerWithCb = new FloorplanImporter(renderer, { onHouseLoaded: callback });
      const data = makeSampleHouse();
      importerWithCb._applyToRenderer(data);
      expect(callback).toHaveBeenCalledWith(data);
    });
  });

  describe('_buildPrompt', () => {
    it('includes building name', () => {
      const prompt = importer._buildPrompt('My House', 1, '');
      expect(prompt).toContain('My House');
    });

    it('includes scale hint when provided', () => {
      const prompt = importer._buildPrompt('House', 1, 'Living room is 5m wide');
      expect(prompt).toContain('Scale reference: Living room is 5m wide');
    });

    it('uses default scale message when no hint', () => {
      const prompt = importer._buildPrompt('House', 1, '');
      expect(prompt).toContain('Estimate dimensions from standard door widths');
    });

    it('includes floor count', () => {
      const prompt = importer._buildPrompt('House', 2, '');
      expect(prompt).toContain('2 floor(s)');
    });
  });
});