<?php

namespace Tests\Unit;

use App\Models\EvaluationRuleSet;
use App\Models\WorkingQso;
use App\Services\Evaluation\OperatingWindowService;
use Carbon\Carbon;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class OperatingWindowServiceTest extends TestCase
{
    use RefreshDatabase;

    private function createQso(int $runId, int $logId, int $bandId, Carbon $ts, int $points, bool $valid = true): int
    {
        $logQso = $this->createLogQso(['log_id' => $logId]);

        $this->createQsoResult([
            'evaluation_run_id' => $runId,
            'log_qso_id' => $logQso->id,
            'is_valid' => $valid,
            'points' => $points,
        ]);

        WorkingQso::create([
            'evaluation_run_id' => $runId,
            'log_qso_id' => $logQso->id,
            'log_id' => $logId,
            'ts_utc' => $ts,
            'band_id' => $bandId,
            'call_norm' => 'OK1AAA',
            'rcall_norm' => 'OK1BBB',
            'loc_norm' => 'JN00AA',
            'rloc_norm' => 'JN00AA',
        ]);

        return $logQso->id;
    }

    public function test_pick_best_window_prefers_higher_score(): void
    {
        $ruleSet = $this->createRuleSet([
            'use_multipliers' => false,
            'multiplier_type' => 'NONE',
            'multiplier_scope' => 'OVERALL',
            'multiplier_source' => 'VALID_ONLY',
        ]);
        $round = $this->createRound();
        $log = $this->createLog(['round_id' => $round->id]);
        $run = $this->createEvaluationRun(['rule_set_id' => $ruleSet->id, 'round_id' => $round->id]);
        $band = $this->createBand();

        $t0 = Carbon::create(2025, 1, 1, 0, 0, 0, 'UTC');
        $t1 = Carbon::create(2025, 1, 1, 1, 0, 0, 'UTC');
        $t2 = Carbon::create(2025, 1, 1, 7, 0, 0, 'UTC');
        $t3 = Carbon::create(2025, 1, 1, 8, 0, 0, 'UTC');

        $firstA = $this->createQso($run->id, $log->id, $band->id, $t0, 10);
        $firstB = $this->createQso($run->id, $log->id, $band->id, $t1, 10);
        $bestA = $this->createQso($run->id, $log->id, $band->id, $t2, 25);
        $bestB = $this->createQso($run->id, $log->id, $band->id, $t3, 25);

        $service = new OperatingWindowService();
        $result = $service->pickBestOperatingWindow($run->id, $log->id, 6, $ruleSet);

        $this->assertNotNull($result);
        $this->assertSame($t0->toDateTimeString(), $result['startUtc']->toDateTimeString());
        $this->assertSame($t1->toDateTimeString(), $result['endUtc']->toDateTimeString());
        $this->assertSame($t2->toDateTimeString(), $result['secondStartUtc']?->toDateTimeString());
        $this->assertSame($t3->toDateTimeString(), $result['secondEndUtc']?->toDateTimeString());
        $this->assertSame([$firstA, $firstB, $bestA, $bestB], $result['includedLogQsoIds']);
        $this->assertSame(4, $result['qsoCount']);
    }

    public function test_tie_break_prefers_earlier_start(): void
    {
        $ruleSet = $this->createRuleSet([
            'use_multipliers' => false,
            'multiplier_type' => 'NONE',
            'multiplier_scope' => 'OVERALL',
            'multiplier_source' => 'VALID_ONLY',
        ]);
        $round = $this->createRound();
        $log = $this->createLog(['round_id' => $round->id]);
        $run = $this->createEvaluationRun(['rule_set_id' => $ruleSet->id, 'round_id' => $round->id]);
        $band = $this->createBand();

        $t0 = Carbon::create(2025, 1, 1, 0, 0, 0, 'UTC');
        $t1 = Carbon::create(2025, 1, 1, 1, 0, 0, 'UTC');
        $t2 = Carbon::create(2025, 1, 1, 15, 0, 0, 'UTC');
        $t3 = Carbon::create(2025, 1, 1, 21, 0, 0, 'UTC');

        $firstA = $this->createQso($run->id, $log->id, $band->id, $t0, 10);
        $firstB = $this->createQso($run->id, $log->id, $band->id, $t1, 10);
        $this->createQso($run->id, $log->id, $band->id, $t2, 10);
        $this->createQso($run->id, $log->id, $band->id, $t3, 10);

        $service = new OperatingWindowService();
        $result = $service->pickBestOperatingWindow($run->id, $log->id, 6, $ruleSet);

        $this->assertNotNull($result);
        $this->assertSame($t0->toDateTimeString(), $result['startUtc']->toDateTimeString());
        $this->assertSame($t1->toDateTimeString(), $result['endUtc']->toDateTimeString());
        $this->assertNull($result['secondStartUtc']);
        $this->assertNull($result['secondEndUtc']);
        $this->assertSame([$firstA, $firstB], $result['includedLogQsoIds']);
    }

    public function test_window_includes_boundary_at_six_hours(): void
    {
        $ruleSet = $this->createRuleSet([
            'use_multipliers' => false,
            'multiplier_type' => 'NONE',
            'multiplier_scope' => 'OVERALL',
            'multiplier_source' => 'VALID_ONLY',
        ]);
        $round = $this->createRound();
        $log = $this->createLog(['round_id' => $round->id]);
        $run = $this->createEvaluationRun(['rule_set_id' => $ruleSet->id, 'round_id' => $round->id]);
        $band = $this->createBand();

        $t0 = Carbon::create(2025, 1, 1, 0, 0, 0, 'UTC');
        $t1 = Carbon::create(2025, 1, 1, 6, 0, 0, 'UTC');

        $this->createQso($run->id, $log->id, $band->id, $t0, 10);
        $this->createQso($run->id, $log->id, $band->id, $t1, 10);

        $service = new OperatingWindowService();
        $result = $service->pickBestOperatingWindow($run->id, $log->id, 6, $ruleSet);

        $this->assertNotNull($result);
        $this->assertSame($t0->toDateTimeString(), $result['startUtc']->toDateTimeString());
        $this->assertSame($t1->toDateTimeString(), $result['endUtc']->toDateTimeString());
        $this->assertSame(2, $result['qsoCount']);
    }

    public function test_returns_null_when_no_valid_qso(): void
    {
        $ruleSet = $this->createRuleSet([
            'use_multipliers' => false,
            'multiplier_type' => 'NONE',
            'multiplier_scope' => 'OVERALL',
            'multiplier_source' => 'VALID_ONLY',
        ]);
        $round = $this->createRound();
        $log = $this->createLog(['round_id' => $round->id]);
        $run = $this->createEvaluationRun(['rule_set_id' => $ruleSet->id, 'round_id' => $round->id]);
        $band = $this->createBand();

        $t0 = Carbon::create(2025, 1, 1, 0, 0, 0, 'UTC');
        $this->createQso($run->id, $log->id, $band->id, $t0, 10, false);

        $service = new OperatingWindowService();
        $result = $service->pickBestOperatingWindow($run->id, $log->id, 6, $ruleSet);

        $this->assertNull($result);
    }
}