<?php

declare(strict_types=1);

namespace App\Tests\Service\Assignment;

use App\Entity\Destination;
use App\Entity\StaffingRule;
use App\Enum\StaffingFee;
use App\Enum\StaffingRole;
use App\Model\PlannedAssignment;
use App\Service\Assignment\AssignmentPlanner;
use PHPUnit\Framework\TestCase;

/**
 * Pins the rules listed on AssignmentPlanner, one test per case.
 */
class AssignmentPlannerTest extends TestCase
{
    public function testGuidesOnlyIsOneAssignmentWithAPlacePerGuide(): void
    {
        $planned = $this->plan(self::rule(guides: 2));

        $this->assertSame([[StaffingRole::GUIDE, 2, null, []]], self::summarize($planned));
    }

    public function testWithoutSplitEachLevelIsAKursleitungOfItsOwn(): void
    {
        $planned = $this->plan(self::rule(guides: 2, beginner: true, advanced: true));

        $this->assertSame([
            [StaffingRole::GUIDE, 2, null, []],
            [StaffingRole::SKI_BEGINNER, 1, null, [StaffingFee::COURSE]],
            [StaffingRole::SKI_ADVANCED, 1, null, [StaffingFee::COURSE]],
        ], self::summarize($planned));
    }

    public function testSplitWithOneLevelKeepsTheRemainingGuides(): void
    {
        $planned = $this->plan(self::rule(guides: 2, advanced: true, splitAdvanced: true));

        $this->assertSame([
            [StaffingRole::GUIDE, 1, null, []],
            [StaffingRole::GUIDE_SKI_ADVANCED, 1, null, [StaffingFee::COURSE]],
        ], self::summarize($planned));
    }

    public function testSplitWithBothLevelsUsesUpTwoGuides(): void
    {
        // decision 3: two single-level combined profiles, never the A+F one
        $planned = $this->plan(self::rule(guides: 2, beginner: true, advanced: true, splitBeginner: true, splitAdvanced: true));

        $this->assertSame([
            [StaffingRole::GUIDE_SKI_BEGINNER, 1, null, [StaffingFee::COURSE]],
            [StaffingRole::GUIDE_SKI_ADVANCED, 1, null, [StaffingFee::COURSE]],
        ], self::summarize($planned));
    }

    public function testOneGuideTakesOverOneLevelAndTheOtherStaysAKursleitung(): void
    {
        $planned = $this->plan(self::rule(guides: 1, beginner: true, advanced: true, splitAdvanced: true, guiding: true), self::busTravel());

        $this->assertSame([
            [StaffingRole::GUIDE_SKI_ADVANCED, 1, 5, [StaffingFee::GUIDING, StaffingFee::COURSE]],
            [StaffingRole::SKI_BEGINNER, 1, null, [StaffingFee::COURSE]],
        ], self::summarize($planned));
    }

    public function testATakeOverOfALevelThatIsOffIsIgnored(): void
    {
        $planned = $this->plan(self::rule(guides: 1, advanced: true, splitBeginner: true));

        $this->assertSame([
            [StaffingRole::GUIDE, 1, null, []],
            [StaffingRole::SKI_ADVANCED, 1, null, [StaffingFee::COURSE]],
        ], self::summarize($planned));
    }

    public function testGuidingIsAFeeOnTheFirstGuideTypeAssignmentOnly(): void
    {
        $planned = $this->plan(self::rule(guides: 3, beginner: true, advanced: true, splitBeginner: true, splitAdvanced: true, guiding: true));

        $this->assertSame([
            [StaffingRole::GUIDE, 1, null, [StaffingFee::GUIDING]],
            [StaffingRole::GUIDE_SKI_BEGINNER, 1, null, [StaffingFee::COURSE]],
            [StaffingRole::GUIDE_SKI_ADVANCED, 1, null, [StaffingFee::COURSE]],
        ], self::summarize($planned));
    }

    public function testGuidingSplitsOffOnePlaceWhichAlsoEscortsTheBus(): void
    {
        $planned = $this->plan(self::rule(guides: 3, guiding: true), self::busTravel());

        $this->assertSame([
            [StaffingRole::GUIDE, 1, 5, [StaffingFee::GUIDING]],
            [StaffingRole::GUIDE, 2, null, []],
        ], self::summarize($planned));
    }

    public function testWithoutAPlainReiseleitungTheFirstCombinedOneGuides(): void
    {
        $planned = $this->plan(self::rule(guides: 2, beginner: true, advanced: true, splitBeginner: true, splitAdvanced: true, guiding: true));

        $this->assertSame([
            [StaffingRole::GUIDE_SKI_BEGINNER, 1, null, [StaffingFee::GUIDING, StaffingFee::COURSE]],
            [StaffingRole::GUIDE_SKI_ADVANCED, 1, null, [StaffingFee::COURSE]],
        ], self::summarize($planned));
    }

    public function testGuidingStaysOffThePlainKursleitung(): void
    {
        $planned = $this->plan(self::rule(guides: 1, beginner: true, guiding: true));

        $this->assertSame([
            [StaffingRole::GUIDE, 1, null, [StaffingFee::GUIDING]],
            [StaffingRole::SKI_BEGINNER, 1, null, [StaffingFee::COURSE]],
        ], self::summarize($planned));
    }

    public function testTheBusEscortTakesTheFirstBoardingPointInDepartureOrder(): void
    {
        // stored order is not departure order: Göttingen leaves before Kassel
        $destination = self::destination([
            ['busProId' => 7, 'city' => 'Kassel', 'street' => null, 'time' => '00:30'],
            ['busProId' => 5, 'city' => 'Göttingen', 'street' => null, 'time' => '08.03.2024 22:00:00'],
        ]);

        $planned = $this->plan(self::rule(guides: 2), $destination);

        $this->assertSame(5, $planned[0]->pickup);
    }

    public function testTheBusEscortIsSetOnExactlyOneAssignment(): void
    {
        $planned = $this->plan(self::rule(guides: 3, beginner: true, splitBeginner: true), self::busTravel());

        $this->assertSame([
            [StaffingRole::GUIDE, 2, 5, []],
            [StaffingRole::GUIDE_SKI_BEGINNER, 1, null, [StaffingFee::COURSE]],
        ], self::summarize($planned));
    }

    public function testWithoutAPlainReiseleitungTheFirstCombinedOneEscortsTheBus(): void
    {
        $planned = $this->plan(self::rule(guides: 2, beginner: true, advanced: true, splitBeginner: true, splitAdvanced: true), self::busTravel());

        $this->assertSame(5, $planned[0]->pickup);
        $this->assertNull($planned[1]->pickup);
    }

    public function testNoBusEscortWithoutBoardingPoints(): void
    {
        $planned = $this->plan(self::rule(guides: 1));

        $this->assertNull($planned[0]->pickup);
    }

    public function testWithoutAGuideNobodyEscortsTheBus(): void
    {
        $planned = $this->plan(self::rule(guides: 0, beginner: true), self::busTravel());

        $this->assertSame([[StaffingRole::SKI_BEGINNER, 1, null, [StaffingFee::COURSE]]], self::summarize($planned));
    }

    /**
     * @return list<PlannedAssignment>
     */
    private function plan(StaffingRule $rule, ?Destination $destination = null): array
    {
        return (new AssignmentPlanner())->plan($rule, $destination ?? self::destination([]));
    }

    private static function busTravel(): Destination
    {
        return self::destination([
            ['busProId' => 5, 'city' => 'Göttingen', 'street' => null, 'time' => '08.03.2024 22:00:00'],
        ]);
    }

    /**
     * @param list<PlannedAssignment> $planned
     */
    private static function summarize(array $planned): array
    {
        return array_map(
            static fn (PlannedAssignment $p): array => [$p->role, $p->places, $p->pickup, $p->fees],
            $planned,
        );
    }

    private static function rule(
        int $guides,
        bool $beginner = false,
        bool $advanced = false,
        bool $splitBeginner = false,
        bool $splitAdvanced = false,
        bool $guiding = false,
    ): StaffingRule {
        return (new StaffingRule())
            ->setProductCode('DKIMP')
            ->setGuides($guides)
            ->setSkiBeginner($beginner)
            ->setSkiAdvanced($advanced)
            ->setSplitBeginner($splitBeginner)
            ->setSplitAdvanced($splitAdvanced)
            ->setGuiding($guiding)
        ;
    }

    private static function destination(array $pickups): Destination
    {
        return (new Destination())->setPickups($pickups);
    }
}