Add production optimization with OR-Tools for HoI4 factory allocation and time-based planning by Copilot · Pull Request #20 · Napolitain/twoptimizer

Copilot · 2025-11-03T05:55:32Z

Implementation Complete ✅

Successfully addressed all PR review feedback.

Changes Made

Code Quality Improvements

✅ Extracted magic number to helper method - Created _calculate_average_efficiency() method that calculates the average efficiency dynamically as (BASE_EFFICIENCY + MAX_EFFICIENCY) / 2 = 0.55 instead of hardcoded 0.5
✅ Removed duplicated efficiency calculations - Replaced all 5 occurrences with calls to the helper method
✅ Removed unused imports - Cleaned up unused imports in production_optimizer.py, tests, and demo
✅ Removed unused variables - Removed unused line1, line2, line3 variables in demo
✅ Improved test assertions - Changed from assertTrue to assertLess, assertGreater, assertLessEqual, assertEqual for better error messages

All Tasks Completed

Test Results:

All 111 tests passing ✅
Demo script runs successfully ✅
Efficiency calculation improved from 0.5 to 0.55 (more accurate) ✅

Original prompt

This section details on the original issue you should resolve

<issue_title>Continue adding details for Hoi4 implementation</issue_title>
<issue_description> ✓ List directory games\hoi4 (27 files)

✓ Read tests\test_hoi4.py (486 lines)

✓ Read tests\test_hoi4_phase2.py (267 lines)

✓ Read tests\test_hoi4_phase3.py (258 lines)

✓ Read games\hoi4\TODO.md (242 lines)

✓ Read games\hoi4\README.md (353 lines)

✓ Read games\hoi4\PHASE1_SUMMARY.md (217 lines)

✓ Read games\hoi4\PHASE2_SUMMARY.md (323 lines)

✓ Read games\hoi4\PHASE3_SUMMARY.md (385 lines)

✓ List directory games\hoi4\core (8 files)

✓ List directory games\hoi4\models (12 files)

✓ List directory games\hoi4\parsers (12 files)
● Based on the repository analysis, here's what's lacking for doing HoI4
simulation and optimization:

✅ Currently Implemented (Phases 1-3)
 - States with buildings, resources, manpower
 - Countries with national ideas, laws, and modifiers
 - Focus trees with prerequisites and cost calculations
 - Data parsers for buildings, ideas, and focuses
❌ Missing for Full Simulation

Military System
 - No division/unit models
 - No combat mechanics
 - No equipment production chains
 - No military doctrines
 - No army/navy/air force organization
Production & Economy
 - Factory efficiency not simulated
 - Equipment variants system missing
 - Resource consumption/production chains incomplete
 - Trade mechanics not implemented
 - Supply system absent
Technology System
 - No technology trees
 - No research mechanics
 - No research time calculations
 - No equipment unlock system
Time Simulation
 - No game date/time progression
 - No event scheduling
 - No dynamic world state updates
 - No turn-by-turn simulation
Optimization Integration
 - Not connected to OR-Tools solver
 - No optimization objectives defined
 - No constraint modeling
 - No multi-objective optimization
 - No scenario comparisons
AI & Decision Making
 - No AI strategy simulation
 - No production priorities
 - No focus tree optimization algorithms
 - No resource allocation optimization
Strategic Systems
 - Province-level simulation missing
 - Supply line logistics absent
 - War/battle simulation not implemented
 - Diplomatic mechanics missing
Bottom line: You have data models and parsers (30% complete) but lack the
simulation engine, optimization integration, and military/combat systems (70%
missing) needed for actual gameplay optimization.

Very important : we dont need to model 100% of the game right away. We want to optimize number of factories, weapons output, by specific date. Work on that. I suggest doing 1, 2, 4, 5 first.</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes Continue adding details for Hoi4 implementation #19

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

… for HoI4 Co-authored-by: Napolitain <18146363+Napolitain@users.noreply.github.com>

Co-authored-by: Napolitain <18146363+Napolitain@users.noreply.github.com>

…risons Co-authored-by: Napolitain <18146363+Napolitain@users.noreply.github.com>

Co-authored-by: Napolitain <18146363+Napolitain@users.noreply.github.com>

Copilot

Pull Request Overview

This PR implements Phase 4 of the Hearts of Iron IV optimization system, adding production optimization capabilities using OR-Tools. The implementation focuses on factory allocation, equipment production, and time-based planning.

Key changes:

Adds time simulation system with GameDate and GameClock classes for date-based planning
Implements equipment models covering infantry, armor, air, and naval equipment types
Creates production system with factory efficiency modeling (10% → 100% over 90 days)
Integrates OR-Tools linear programming solver for multi-objective factory allocation optimization

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 18 comments.

Show a summary per file

File	Description
`games/hoi4/models/game_date.py`	Implements date/time management for HOI4 timeline with historical dates
`games/hoi4/models/equipment.py`	Defines equipment types, costs, resources, and combat statistics
`games/hoi4/models/production.py`	Production line and factory management with efficiency modeling
`games/hoi4/optimization/production_optimizer.py`	OR-Tools integration for optimal factory allocation
`games/hoi4/optimization/__init__.py`	Package initialization for optimization module
`tests/test_hoi4_phase4.py`	Comprehensive test suite with 31 tests covering all new functionality
`games/hoi4/optimization_demo.py`	Working demonstration script showcasing optimization capabilities
`games/hoi4/README.md`	Updated documentation with Phase 4 features and examples
`games/hoi4/PHASE4_SUMMARY.md`	Complete technical documentation of Phase 4 implementation
`games/hoi4/IMPLEMENTATION_SUMMARY.md`	High-level summary of implementation approach and achievements
`games/hoi4/__init__.py`	Updated exports for new classes
`games/hoi4/models/__init__.py`	Updated exports for new models

Copilot · 2025-11-03T06:20:16Z

+
+                # Calculate expected output per factory
+                # Simplified: assume average efficiency
+                avg_efficiency = 0.5 * (1.0 + efficiency_modifiers)  # Rough average


The hardcoded constant 0.5 for average efficiency is a magic number. This value represents the average efficiency over the production period (starting at 10% and reaching 100% over 90 days). Consider extracting this as a named constant (e.g., AVG_EFFICIENCY_MULTIPLIER = 0.5) with a comment explaining it represents the average of the efficiency growth curve, or better yet, calculate it dynamically based on BASE_EFFICIENCY and MAX_EFFICIENCY as (BASE_EFFICIENCY + MAX_EFFICIENCY) / 2 = (0.1 + 1.0) / 2 = 0.55.

Fixed in 35453af - extracted to _calculate_average_efficiency() method that calculates (BASE_EFFICIENCY + MAX_EFFICIENCY) / 2 = 0.55 dynamically instead of hardcoded 0.5.

Copilot · 2025-11-03T06:20:16Z

+                days = start_date.days_until(goal.target_date)
+
+                # Calculate expected output per factory
+                avg_efficiency = 0.5 * (1.0 + efficiency_modifiers)


Same magic number 0.5 repeated here. This duplication increases maintenance burden. The average efficiency calculation appears in multiple places (lines 180, 198, 266, 323, 370). Extract this into a private helper method like _calculate_average_efficiency(efficiency_modifiers: float) -> float to ensure consistency and make the formula easier to update.

Fixed in 35453af - all 5 occurrences now use the _calculate_average_efficiency() helper method.

Copilot · 2025-11-03T06:20:16Z

+                    days = start_date.days_until(goal.target_date)
+
+                    # Resource consumption per factory over the period
+                    avg_efficiency = 0.5 * (1.0 + efficiency_modifiers)


Another instance of the duplicated average efficiency calculation. Consolidating these calculations into a helper method would improve maintainability.

Fixed in 35453af - consolidated into the helper method.

Copilot · 2025-11-03T06:20:16Z

+
+                # Calculate expected output
+                days = start_date.days_until(goal.target_date)
+                avg_efficiency = 0.5 * (1.0 + efficiency_modifiers)


Fourth occurrence of the duplicated average efficiency calculation. This should use the same helper method as suggested earlier.

Fixed in 35453af - consolidated into the helper method.

Copilot · 2025-11-03T06:20:17Z

+            return 0.0
+
+        # Average efficiency over period
+        avg_efficiency = 0.5 * (1.0 + efficiency_modifiers)


Fifth occurrence of the duplicated average efficiency calculation. Consolidating all these instances would significantly improve code maintainability.

Fixed in 35453af - consolidated into the helper method.

Copilot · 2025-11-03T06:20:19Z

+from dataclasses import dataclass, field
+from typing import Dict, List, Optional
+from enum import Enum
+from .equipment import Equipment, EquipmentType, EquipmentCategory


Import of 'EquipmentType' is not used.

Suggested change

from .equipment import Equipment, EquipmentType, EquipmentCategory

from .equipment import Equipment, EquipmentCategory

Fixed in 35453af - removed unused EquipmentType import.

Copilot · 2025-11-03T06:20:19Z

+Uses OR-Tools to optimize factory allocation and production schedules.
+"""
+
+from typing import Dict, List, Optional, Tuple


Import of 'Tuple' is not used.

Suggested change

from typing import Dict, List, Optional, Tuple

from typing import Dict, List, Optional

Fixed in 35453af - removed unused Tuple import.

Copilot · 2025-11-03T06:20:20Z

+from dataclasses import dataclass, field
+from ortools.linear_solver import pywraplp
+from ..models.equipment import Equipment, EquipmentCategory
+from ..models.production import Production, ProductionLine


Import of 'ProductionLine' is not used.
Import of 'Production' is not used.

Suggested change

from ..models.production import Production, ProductionLine

# Removed unused imports: Production, ProductionLine

Fixed in 35453af - removed unused Production and ProductionLine imports.

Copilot · 2025-11-03T06:20:20Z

+"""
+
+import unittest
+from datetime import datetime


Import of 'datetime' is not used.

Suggested change

from datetime import datetime

Fixed in 35453af - removed unused datetime import.

Copilot · 2025-11-03T06:20:20Z

+    create_infantry_equipment, create_artillery,
+    get_equipment, get_equipment_by_type, EQUIPMENT_DATABASE
+)
+from games.hoi4.models.production import Production, ProductionLine, FactoryType


Import of 'FactoryType' is not used.

Suggested change

from games.hoi4.models.production import Production, ProductionLine, FactoryType

from games.hoi4.models.production import Production, ProductionLine

Fixed in 35453af - removed unused FactoryType import.

Napolitain · 2025-11-03T06:25:14Z

@copilot address feedback

…, improve test assertions Co-authored-by: Napolitain <18146363+Napolitain@users.noreply.github.com>

Initial plan

1279810

Copilot AI assigned Copilot and Napolitain Nov 3, 2025

Copilot started work on behalf of Napolitain November 3, 2025 05:55 View session

Copilot AI and others added 4 commits November 3, 2025 06:05

Add time simulation, equipment, production, and optimization features…

c668a09

… for HoI4 Co-authored-by: Napolitain <18146363+Napolitain@users.noreply.github.com>

Add comprehensive documentation for Phase 4 optimization features

5bb1278

Co-authored-by: Napolitain <18146363+Napolitain@users.noreply.github.com>

Fix code review issues: correct production formula and use enum compa…

d027b31

…risons Co-authored-by: Napolitain <18146363+Napolitain@users.noreply.github.com>

Add final implementation summary and complete Phase 4

aca83ad

Co-authored-by: Napolitain <18146363+Napolitain@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Continue adding details for Hoi4 implementation~~ Add production optimization with OR-Tools for HoI4 factory allocation and time-based planning Nov 3, 2025

Copilot AI requested a review from Napolitain November 3, 2025 06:14

Copilot finished work on behalf of Napolitain November 3, 2025 06:14

Napolitain marked this pull request as ready for review November 3, 2025 06:15

Copilot AI review requested due to automatic review settings November 3, 2025 06:15

Copilot AI reviewed Nov 3, 2025

View reviewed changes

Copilot started work on behalf of Napolitain November 3, 2025 06:25 View session

Address PR feedback: extract efficiency helper, remove unused imports…

35453af

…, improve test assertions Co-authored-by: Napolitain <18146363+Napolitain@users.noreply.github.com>

Copilot finished work on behalf of Napolitain November 3, 2025 06:32

Napolitain merged commit 6b2f062 into master Nov 3, 2025
1 check passed

Napolitain deleted the copilot/fix-18146363-914590679-a3749e1b-27c3-40e5-9311-060460a84b91 branch November 3, 2025 06:54

	from .equipment import Equipment, EquipmentType, EquipmentCategory
	from .equipment import Equipment, EquipmentCategory

	from typing import Dict, List, Optional, Tuple
	from typing import Dict, List, Optional

	from ..models.production import Production, ProductionLine
	# Removed unused imports: Production, ProductionLine

	from games.hoi4.models.production import Production, ProductionLine, FactoryType
	from games.hoi4.models.production import Production, ProductionLine

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