<?php declare(strict_types=1);

namespace Nechaev\Reports\Features\Reports;

use Nechaev\Reports\Core\App;
use Nechaev\Reports\Framework\Database\Database;

final class ReportsApi {
    private Database $db;

    public function __construct(?Database $db = null) {
        $this->db = $db ?? App::getDb();
    }

    /**
     * @return array<int, array{id: int, name: string}>
     */
    public function getTeams(): array {
        $rows = $this->db->getRowset(
            'SELECT id, TRIM(team_name) AS name FROM teams ORDER BY TRIM(team_name)'
        );

        return array_map(
            static fn (array $row): array => [
                'id' => (int) $row['id'],
                'name' => $row['name'],
            ],
            $rows
        );
    }

    /**
     * @return array<int, array{
     *     id: int,
     *     jira_sprint_id: int,
     *     sprint_name: string,
     *     sprint_activate_datetime: string,
     *     sprint_complete_datetime: string,
     *     sprint_completion_percentage: float|null,
     *     lead_time_max: int|null,
     *     lead_time_min: int|null,
     *     lead_time_p95: float|null,
     *     lead_time_p80: float|null,
     *     lead_time_p50: float|null
     * }>
     */
    public function getSprintsByTeamId(int $teamId): array {
        $rows = $this->db->getRowset(
            'SELECT s.id,
                    s.jira_sprint_id,
                    s.sprint_name,
                    s.sprint_activate_datetime,
                    s.sprint_complete_datetime,
                    s.sprint_completion_percentage,
                    MAX(t.lead_time_days) AS lead_time_max,
                    MIN(t.lead_time_days) AS lead_time_min,
                    percentile_cont(0.95) WITHIN GROUP (ORDER BY t.lead_time_days) AS lead_time_p95,
                    percentile_cont(0.80) WITHIN GROUP (ORDER BY t.lead_time_days) AS lead_time_p80,
                    percentile_cont(0.50) WITHIN GROUP (ORDER BY t.lead_time_days) AS lead_time_p50
             FROM sprints s
             LEFT JOIN tasks t ON t.sprint_id = s.id AND t.lead_time_days IS NOT NULL
             WHERE s.team_id = :team_id
             GROUP BY s.id,
                      s.jira_sprint_id,
                      s.sprint_name,
                      s.sprint_activate_datetime,
                      s.sprint_complete_datetime,
                      s.sprint_completion_percentage
             ORDER BY s.sprint_activate_datetime ASC',
            ['team_id' => $teamId]
        );

        return array_map(
            static fn (array $row): array => [
                'id' => (int) $row['id'],
                'jira_sprint_id' => (int) $row['jira_sprint_id'],
                'sprint_name' => $row['sprint_name'],
                'sprint_activate_datetime' => $row['sprint_activate_datetime'],
                'sprint_complete_datetime' => $row['sprint_complete_datetime'],
                'sprint_completion_percentage' => $row['sprint_completion_percentage'] !== null
                    ? (float) $row['sprint_completion_percentage']
                    : null,
                'lead_time_max' => $row['lead_time_max'] !== null ? (int) $row['lead_time_max'] : null,
                'lead_time_min' => $row['lead_time_min'] !== null ? (int) $row['lead_time_min'] : null,
                'lead_time_p95' => $row['lead_time_p95'] !== null ? (float) $row['lead_time_p95'] : null,
                'lead_time_p80' => $row['lead_time_p80'] !== null ? (float) $row['lead_time_p80'] : null,
                'lead_time_p50' => $row['lead_time_p50'] !== null ? (float) $row['lead_time_p50'] : null,
            ],
            $rows
        );
    }
}