<?php

declare(strict_types=1);

use App\Framework\Cache\Cache;
use App\Framework\Cache\Warming\CacheWarmingService;
use App\Framework\Cache\Warming\WarmupStrategy;
use App\Framework\Cache\Warming\ValueObjects\WarmupPriority;
use App\Framework\Cache\Warming\ValueObjects\WarmupResult;
use App\Framework\Logging\Logger;
use App\Framework\Logging\ValueObjects\LogContext;

describe('CacheWarmingService', function () {
    beforeEach(function () {
        $this->logger = Mockery::mock(Logger::class);
        $this->logger->shouldReceive('info')->andReturnNull();
        $this->logger->shouldReceive('debug')->andReturnNull();
        $this->logger->shouldReceive('error')->andReturnNull();
    });

    afterEach(function () {
        Mockery::close();
    });

    it('warms all strategies', function () {
        $strategy1 = Mockery::mock(WarmupStrategy::class);
        $strategy1->shouldReceive('getName')->andReturn('strategy1');
        $strategy1->shouldReceive('getPriority')->andReturn(WarmupPriority::HIGH->value);
        $strategy1->shouldReceive('shouldRun')->andReturn(true);
        $strategy1->shouldReceive('getEstimatedDuration')->andReturn(1);
        $strategy1->shouldReceive('warmup')->andReturn(new WarmupResult(
            strategyName: 'strategy1',
            itemsWarmed: 10,
            itemsFailed: 0,
            durationSeconds: 1.0,
            memoryUsedBytes: 1024
        ));

        $strategy2 = Mockery::mock(WarmupStrategy::class);
        $strategy2->shouldReceive('getName')->andReturn('strategy2');
        $strategy2->shouldReceive('getPriority')->andReturn(WarmupPriority::MEDIUM->value);
        $strategy2->shouldReceive('shouldRun')->andReturn(true);
        $strategy2->shouldReceive('getEstimatedDuration')->andReturn(2);
        $strategy2->shouldReceive('warmup')->andReturn(new WarmupResult(
            strategyName: 'strategy2',
            itemsWarmed: 20,
            itemsFailed: 0,
            durationSeconds: 2.0,
            memoryUsedBytes: 2048
        ));

        $service = new CacheWarmingService(
            strategies: [$strategy1, $strategy2],
            logger: $this->logger
        );

        $metrics = $service->warmAll();

        expect($metrics->totalStrategiesExecuted)->toBe(2);
        expect($metrics->totalItemsWarmed)->toBe(30);
    });

    it('skips strategies when shouldRun returns false', function () {
        $strategy1 = Mockery::mock(WarmupStrategy::class);
        $strategy1->shouldReceive('getName')->andReturn('strategy1');
        $strategy1->shouldReceive('getPriority')->andReturn(WarmupPriority::HIGH->value);
        $strategy1->shouldReceive('shouldRun')->andReturn(false);
        $strategy1->shouldNotReceive('warmup');

        $service = new CacheWarmingService(
            strategies: [$strategy1],
            logger: $this->logger
        );

        $metrics = $service->warmAll(force: false);

        expect($metrics->totalStrategiesExecuted)->toBe(0);
    });

    it('forces execution when force is true', function () {
        $strategy1 = Mockery::mock(WarmupStrategy::class);
        $strategy1->shouldReceive('getName')->andReturn('strategy1');
        $strategy1->shouldReceive('getPriority')->andReturn(WarmupPriority::HIGH->value);
        $strategy1->shouldReceive('shouldRun')->andReturn(false);
        $strategy1->shouldReceive('getEstimatedDuration')->andReturn(1);
        $strategy1->shouldReceive('warmup')->andReturn(new WarmupResult(
            strategyName: 'strategy1',
            itemsWarmed: 10,
            itemsFailed: 0,
            durationSeconds: 1.0,
            memoryUsedBytes: 1024
        ));

        $service = new CacheWarmingService(
            strategies: [$strategy1],
            logger: $this->logger
        );

        $metrics = $service->warmAll(force: true);

        expect($metrics->totalStrategiesExecuted)->toBe(1);
        expect($metrics->totalItemsWarmed)->toBe(10);
    });

    it('sorts strategies by priority', function () {
        $lowPriority = Mockery::mock(WarmupStrategy::class);
        $lowPriority->shouldReceive('getName')->andReturn('low');
        $lowPriority->shouldReceive('getPriority')->andReturn(WarmupPriority::LOW->value);
        $lowPriority->shouldReceive('shouldRun')->andReturn(true);
        $lowPriority->shouldReceive('getEstimatedDuration')->andReturn(1);
        $lowPriority->shouldReceive('warmup')->andReturn(new WarmupResult(
            strategyName: 'low',
            itemsWarmed: 5,
            itemsFailed: 0,
            durationSeconds: 1.0,
            memoryUsedBytes: 512
        ));

        $highPriority = Mockery::mock(WarmupStrategy::class);
        $highPriority->shouldReceive('getName')->andReturn('high');
        $highPriority->shouldReceive('getPriority')->andReturn(WarmupPriority::HIGH->value);
        $highPriority->shouldReceive('shouldRun')->andReturn(true);
        $highPriority->shouldReceive('getEstimatedDuration')->andReturn(1);
        $highPriority->shouldReceive('warmup')->andReturn(new WarmupResult(
            strategyName: 'high',
            itemsWarmed: 10,
            itemsFailed: 0,
            durationSeconds: 1.0,
            memoryUsedBytes: 1024
        ));

        // Pass in wrong order - service should sort by priority
        $service = new CacheWarmingService(
            strategies: [$lowPriority, $highPriority],
            logger: $this->logger
        );

        $strategies = $service->getStrategies();

        expect($strategies[0]->getName())->toBe('high');
        expect($strategies[1]->getName())->toBe('low');
    });

    it('warms specific strategy by name', function () {
        $strategy1 = Mockery::mock(WarmupStrategy::class);
        $strategy1->shouldReceive('getName')->andReturn('strategy1');
        $strategy1->shouldReceive('getPriority')->andReturn(WarmupPriority::HIGH->value);
        $strategy1->shouldReceive('getEstimatedDuration')->andReturn(1);
        $strategy1->shouldReceive('warmup')->andReturn(new WarmupResult(
            strategyName: 'strategy1',
            itemsWarmed: 10,
            itemsFailed: 0,
            durationSeconds: 1.0,
            memoryUsedBytes: 1024
        ));

        $service = new CacheWarmingService(
            strategies: [$strategy1],
            logger: $this->logger
        );

        $result = $service->warmStrategy('strategy1');

        expect($result->strategyName)->toBe('strategy1');
        expect($result->itemsWarmed)->toBe(10);
    });

    it('throws when strategy not found', function () {
        $service = new CacheWarmingService(
            strategies: [],
            logger: $this->logger
        );

        $service->warmStrategy('nonexistent');
    })->throws(InvalidArgumentException::class, 'Strategy not found: nonexistent');

    it('warms by priority threshold', function () {
        $critical = Mockery::mock(WarmupStrategy::class);
        $critical->shouldReceive('getName')->andReturn('critical');
        $critical->shouldReceive('getPriority')->andReturn(WarmupPriority::CRITICAL->value);
        $critical->shouldReceive('shouldRun')->andReturn(true);
        $critical->shouldReceive('getEstimatedDuration')->andReturn(1);
        $critical->shouldReceive('warmup')->andReturn(new WarmupResult(
            strategyName: 'critical',
            itemsWarmed: 10,
            itemsFailed: 0,
            durationSeconds: 1.0,
            memoryUsedBytes: 1024
        ));

        $low = Mockery::mock(WarmupStrategy::class);
        $low->shouldReceive('getName')->andReturn('low');
        $low->shouldReceive('getPriority')->andReturn(WarmupPriority::LOW->value);
        $low->shouldNotReceive('warmup');

        $service = new CacheWarmingService(
            strategies: [$critical, $low],
            logger: $this->logger
        );

        $metrics = $service->warmByPriority(WarmupPriority::HIGH->value);

        // Should only warm critical (priority 1000 >= 500)
        expect($metrics->totalStrategiesExecuted)->toBe(1);
    });

    it('calculates estimated total duration', function () {
        $strategy1 = Mockery::mock(WarmupStrategy::class);
        $strategy1->shouldReceive('getName')->andReturn('strategy1');
        $strategy1->shouldReceive('getPriority')->andReturn(WarmupPriority::HIGH->value);
        $strategy1->shouldReceive('getEstimatedDuration')->andReturn(5);
        $strategy1->shouldReceive('shouldRun')->andReturn(true);

        $strategy2 = Mockery::mock(WarmupStrategy::class);
        $strategy2->shouldReceive('getName')->andReturn('strategy2');
        $strategy2->shouldReceive('getPriority')->andReturn(WarmupPriority::MEDIUM->value);
        $strategy2->shouldReceive('getEstimatedDuration')->andReturn(3);
        $strategy2->shouldReceive('shouldRun')->andReturn(true);

        $service = new CacheWarmingService(
            strategies: [$strategy1, $strategy2],
            logger: $this->logger
        );

        $duration = $service->getEstimatedTotalDuration();

        expect($duration)->toBe(8);
    });

    it('handles strategy exceptions gracefully', function () {
        $failingStrategy = Mockery::mock(WarmupStrategy::class);
        $failingStrategy->shouldReceive('getName')->andReturn('failing');
        $failingStrategy->shouldReceive('getPriority')->andReturn(WarmupPriority::HIGH->value);
        $failingStrategy->shouldReceive('shouldRun')->andReturn(true);
        $failingStrategy->shouldReceive('getEstimatedDuration')->andReturn(1);
        $failingStrategy->shouldReceive('warmup')->andThrow(new RuntimeException('Test error'));

        $service = new CacheWarmingService(
            strategies: [$failingStrategy],
            logger: $this->logger
        );

        $metrics = $service->warmAll();

        // Should handle error and return failed result
        expect($metrics->totalStrategiesExecuted)->toBe(1);
        expect($metrics->totalItemsFailed)->toBeGreaterThan(0);
    });
});