<?php

declare(strict_types=1);

namespace App\Models;

use DateTimeImmutable;
use PDO;
use Throwable;

final class AgentModel extends BaseModel
{
    private const AGENT_SELECT = <<<'SQL'
        SELECT a.id_agent, a.matricule, a.nom, a.prenom, a.email,
               a.telephone, a.adresse, a.est_diplome, a.diplome_libelle,
               a.date_debut_contrat, a.date_fin_contrat, a.type_contrat,
               a.formation_repartition_annuelle, a.commentaire_pta,
               a.id_poste, po.code AS poste_code, po.libelle AS poste_libelle,
               po.famille AS poste_famille, po.heures_mercredi_minutes,
               po.heures_extrascolaire_minutes, po.autorise_preparation,
               po.peut_assurer_animation, po.preparation_lundi_si_100,
               a.id_structure,
               s.nom AS structure_nom,
               s.nom AS structure_principale_nom,
               s.type_affectation AS structure_type_affectation,
               s.type_affectation AS structure_principale_type_affectation
        FROM agent a
        LEFT JOIN poste_agent po ON po.id_poste = a.id_poste
        LEFT JOIN structure s ON s.id_structure = a.id_structure
    SQL;

    public function allActive(): array
    {
        return $this->pdo->query(
            self::AGENT_SELECT . " WHERE a.actif = TRUE ORDER BY a.nom, a.prenom"
        )->fetchAll();
    }

    public function allVisibleForStructure(int $structureId): array
    {
        $stmt = $this->pdo->prepare(
            self::AGENT_SELECT . "
             WHERE a.actif = TRUE
               AND (
                    a.id_structure = :structure_id_default
                    OR EXISTS (
                        SELECT 1
                        FROM planning p
                        WHERE p.id_agent = a.id_agent
                          AND p.id_structure = :structure_id_planning
                    )
               )
             ORDER BY a.nom, a.prenom"
        );
        $stmt->execute([
            'structure_id_default' => $structureId,
            'structure_id_planning' => $structureId,
        ]);
        return $stmt->fetchAll();
    }

    public function allEligibleForPta(): array
    {
        return $this->pdo->query(
            self::AGENT_SELECT . "
             WHERE a.actif = TRUE
               AND a.type_contrat = 'PERMANENT'
               AND a.id_poste IS NOT NULL
             ORDER BY a.nom, a.prenom"
        )->fetchAll();
    }

    public function allPosts(): array
    {
        return $this->pdo->query(
            "SELECT id_poste, code, libelle, famille, heures_mercredi_minutes,
                    heures_extrascolaire_minutes, autorise_preparation,
                    peut_assurer_animation, preparation_lundi_si_100
             FROM poste_agent
             WHERE actif = TRUE
             ORDER BY ordre_affichage, libelle"
        )->fetchAll();
    }

    public function listForLocation(int $selectedLocation = 0): array
    {
        $stmt = $this->pdo->prepare(
            "SELECT a.id_agent, a.matricule, a.nom, a.prenom, a.id_structure,
                    a.id_poste, po.libelle AS poste_libelle,
                    s.nom AS structure_nom,
                    s.type_affectation AS structure_type_affectation,
                    CASE WHEN a.id_structure = :selected_location THEN 1 ELSE 0 END AS lieu_principal_selectionne
             FROM agent a
             LEFT JOIN poste_agent po ON po.id_poste = a.id_poste
             LEFT JOIN structure s ON s.id_structure = a.id_structure
             WHERE a.actif = TRUE
             ORDER BY lieu_principal_selectionne DESC, a.nom, a.prenom"
        );
        $stmt->execute(['selected_location' => $selectedLocation]);
        return $stmt->fetchAll();
    }

    public function findActive(int $agentId): ?array
    {
        $stmt = $this->pdo->prepare(
            self::AGENT_SELECT . " WHERE a.id_agent = :id AND a.actif = TRUE LIMIT 1"
        );
        $stmt->execute(['id' => $agentId]);
        return $stmt->fetch() ?: null;
    }

    public function matriculeExists(string $matricule): bool
    {
        $stmt = $this->pdo->prepare('SELECT 1 FROM agent WHERE matricule = :matricule LIMIT 1');
        $stmt->execute(['matricule' => $matricule]);
        return $stmt->fetchColumn() !== false;
    }

    public function createWithDefaults(array $data): array
    {
        $contractStart = new DateTimeImmutable((string) $data['date_debut_contrat']);
        $contractEnd = !empty($data['date_fin_contrat'])
            ? new DateTimeImmutable((string) $data['date_fin_contrat'])
            : null;
        $year = (int) $contractStart->format('Y');
        // Le quota PTA est suivi sur l'année civile, indépendamment de la date
        // anniversaire du contrat. La date de contrat reste une donnée RH.
        $periodStart = new DateTimeImmutable(sprintf('%04d-01-01', $year));
        $periodEnd = new DateTimeImmutable(sprintf('%04d-12-31', $year));
        $quotaReference = QuotaModel::REFERENCE_MINUTES;
        $quotaTarget = (int) round($quotaReference * ((float) $data['quotite_travail'] / 100));
        $trainingEnvelope = !empty($data['formation_repartition_annuelle']) ? 0 : 840;

        try {
            $this->pdo->beginTransaction();

            $insertAgent = $this->pdo->prepare(
                'INSERT INTO agent (
                    matricule, nom, prenom, email, telephone, adresse,
                    est_diplome, diplome_libelle, date_debut_contrat,
                    id_poste, type_contrat, date_fin_contrat,
                    formation_repartition_annuelle, commentaire_pta,
                    id_structure, actif
                 ) VALUES (
                    :matricule, :nom, :prenom, :email, :telephone, :adresse,
                    :est_diplome, :diplome_libelle, :date_debut_contrat,
                    :id_poste, :type_contrat, :date_fin_contrat,
                    :formation_repartition_annuelle, :commentaire_pta,
                    :structure_id, TRUE
                 )'
            );
            $insertAgent->execute([
                'matricule' => $data['matricule'],
                'nom' => $data['nom'],
                'prenom' => $data['prenom'],
                'email' => $data['email'],
                'telephone' => $data['telephone'],
                'adresse' => $data['adresse'],
                'est_diplome' => $data['est_diplome'] ? 1 : 0,
                'diplome_libelle' => $data['est_diplome'] ? $data['diplome_libelle'] : null,
                'date_debut_contrat' => $contractStart->format('Y-m-d'),
                'id_poste' => $data['id_poste'],
                'type_contrat' => $data['type_contrat'],
                'date_fin_contrat' => $contractEnd?->format('Y-m-d'),
                'formation_repartition_annuelle' => $data['formation_repartition_annuelle'] ? 1 : 0,
                'commentaire_pta' => $data['commentaire_pta'],
                'structure_id' => $data['structure_id'],
            ]);
            $agentId = (int) $this->pdo->lastInsertId();

            $history = $this->pdo->prepare(
                'INSERT INTO agent_structure (id_agent, id_structure, date_debut, date_fin, actif)
                 VALUES (:agent_id, :structure_id, :date_debut, NULL, TRUE)'
            );
            $history->execute([
                'agent_id' => $agentId,
                'structure_id' => $data['structure_id'],
                'date_debut' => $contractStart->format('Y-m-d'),
            ]);

            $quota = $this->pdo->prepare(
                'INSERT INTO quota_agent_annuel (
                    id_agent, annee, quotite_travail, quota_reference_minutes,
                    quota_cible_minutes, commentaire
                 ) VALUES (
                    :agent_id, :annee, :quotite, :quota_reference,
                    :quota_cible, :commentaire
                 )'
            );
            $quota->execute([
                'agent_id' => $agentId,
                'annee' => $year,
                'quotite' => $data['quotite_travail'],
                'quota_reference' => $quotaReference,
                'quota_cible' => $quotaTarget,
                'commentaire' => 'Quota PTA de référence - année civile',
            ]);

            $pta = $this->pdo->prepare(
                'INSERT INTO pta_annuel (
                    id_agent, date_debut, date_fin, quotite_travail,
                    quota_reference_minutes, quota_cible_minutes,
                    enveloppe_formation_minutes, statut
                 ) VALUES (
                    :agent_id, :date_debut, :date_fin, :quotite,
                    :quota_reference, :quota_cible,
                    :formation, \'BROUILLON\'
                 )'
            );
            $pta->execute([
                'agent_id' => $agentId,
                'date_debut' => $periodStart->format('Y-m-d'),
                'date_fin' => $periodEnd->format('Y-m-d'),
                'quotite' => $data['quotite_travail'],
                'quota_reference' => $quotaReference,
                'quota_cible' => $quotaTarget,
                'formation' => $trainingEnvelope,
            ]);

            $this->pdo->commit();

            return [
                'id_agent' => $agentId,
                'annee_quota' => $year,
                'date_debut_contrat' => $contractStart->format('Y-m-d'),
                'date_fin_contrat' => $contractEnd?->format('Y-m-d'),
                'quota_cible_minutes' => $quotaTarget,
                'id_pta' => (int) $this->pdo->lastInsertId(),
            ];
        } catch (Throwable $e) {
            if ($this->pdo->inTransaction()) {
                $this->pdo->rollBack();
            }
            throw $e;
        }
    }

    public function updateProfile(int $agentId, array $data): void
    {
        try {
            $this->pdo->beginTransaction();

            $currentStmt = $this->pdo->prepare('SELECT id_structure FROM agent WHERE id_agent = :agent_id FOR UPDATE');
            $currentStmt->execute(['agent_id' => $agentId]);
            $currentStructure = $currentStmt->fetchColumn();
            if ($currentStructure === false) {
                throw new \RuntimeException('Agent introuvable.');
            }
            $currentStructureId = $currentStructure !== null ? (int) $currentStructure : null;
            $newStructureId = $data['structure_id'];

            $update = $this->pdo->prepare(
                'UPDATE agent
                 SET email = :email,
                     telephone = :telephone,
                     adresse = :adresse,
                     est_diplome = :est_diplome,
                     diplome_libelle = :diplome_libelle,
                     date_debut_contrat = :date_debut_contrat,
                     id_poste = :id_poste,
                     type_contrat = :type_contrat,
                     date_fin_contrat = :date_fin_contrat,
                     formation_repartition_annuelle = :formation_repartition_annuelle,
                     commentaire_pta = :commentaire_pta,
                     id_structure = :structure_id
                 WHERE id_agent = :agent_id'
            );
            $update->bindValue(':agent_id', $agentId, PDO::PARAM_INT);
            $update->bindValue(':email', $data['email']);
            $update->bindValue(':telephone', $data['telephone']);
            $update->bindValue(':adresse', $data['adresse']);
            $update->bindValue(':est_diplome', $data['est_diplome'] ? 1 : 0, PDO::PARAM_INT);
            $update->bindValue(':diplome_libelle', $data['est_diplome'] ? $data['diplome_libelle'] : null);
            $update->bindValue(':date_debut_contrat', $data['date_debut_contrat']);
            $update->bindValue(':id_poste', $data['id_poste'], PDO::PARAM_INT);
            $update->bindValue(':type_contrat', $data['type_contrat']);
            $update->bindValue(':date_fin_contrat', $data['date_fin_contrat']);
            $update->bindValue(':formation_repartition_annuelle', $data['formation_repartition_annuelle'] ? 1 : 0, PDO::PARAM_INT);
            $update->bindValue(':commentaire_pta', $data['commentaire_pta']);
            if ($newStructureId === null) {
                $update->bindValue(':structure_id', null, PDO::PARAM_NULL);
            } else {
                $update->bindValue(':structure_id', $newStructureId, PDO::PARAM_INT);
            }
            $update->execute();

            if ($currentStructureId !== $newStructureId) {
                $close = $this->pdo->prepare(
                    "UPDATE agent_structure
                     SET actif = FALSE,
                         date_fin = CASE
                             WHEN date_debut IS NOT NULL AND date_debut > CURRENT_DATE THEN date_debut
                             ELSE CURRENT_DATE
                         END
                     WHERE id_agent = :agent_id AND actif = TRUE"
                );
                $close->execute(['agent_id' => $agentId]);

                if ($newStructureId !== null) {
                    $history = $this->pdo->prepare(
                        "INSERT INTO agent_structure (id_agent, id_structure, date_debut, date_fin, actif)
                         VALUES (:agent_id, :structure_id, CURRENT_DATE, NULL, TRUE)
                         ON DUPLICATE KEY UPDATE date_fin = NULL, actif = TRUE"
                    );
                    $history->execute(['agent_id' => $agentId, 'structure_id' => $newStructureId]);
                }
            }

            $this->pdo->commit();
        } catch (Throwable $e) {
            if ($this->pdo->inTransaction()) {
                $this->pdo->rollBack();
            }
            throw $e;
        }
    }

    public function updateAssignment(int $agentId, ?int $structureId): void
    {
        try {
            $this->pdo->beginTransaction();

            $update = $this->pdo->prepare('UPDATE agent SET id_structure = :structure_id WHERE id_agent = :agent_id');
            $update->bindValue(':agent_id', $agentId, PDO::PARAM_INT);
            if ($structureId === null) {
                $update->bindValue(':structure_id', null, PDO::PARAM_NULL);
            } else {
                $update->bindValue(':structure_id', $structureId, PDO::PARAM_INT);
            }
            $update->execute();

            $close = $this->pdo->prepare(
                "UPDATE agent_structure
                 SET actif = FALSE,
                     date_fin = CASE
                         WHEN date_debut IS NOT NULL AND date_debut > CURRENT_DATE THEN date_debut
                         ELSE CURRENT_DATE
                     END
                 WHERE id_agent = :agent_id AND actif = TRUE"
            );
            $close->execute(['agent_id' => $agentId]);

            if ($structureId !== null) {
                $history = $this->pdo->prepare(
                    "INSERT INTO agent_structure (id_agent, id_structure, date_debut, date_fin, actif)
                     VALUES (:agent_id, :structure_id, CURRENT_DATE, NULL, TRUE)
                     ON DUPLICATE KEY UPDATE date_fin = NULL, actif = TRUE"
                );
                $history->execute(['agent_id' => $agentId, 'structure_id' => $structureId]);
            }

            $this->pdo->commit();
        } catch (Throwable $e) {
            if ($this->pdo->inTransaction()) {
                $this->pdo->rollBack();
            }
            throw $e;
        }
    }

    public function entriesForWeek(int $agentId, int $year, int $week): array
    {
        $stmt = $this->pdo->prepare(
            "SELECT p.id_planning, p.statut,
                    s2.id_structure, s2.nom AS structure_nom,
                    s2.type_affectation AS structure_type_affectation,
                    c.id_creneau, c.id_motif, c.date_jour,
                    TIME_FORMAT(c.heure_debut, '%H:%i') AS heure_debut,
                    TIME_FORMAT(c.heure_fin, '%H:%i') AS heure_fin,
                    m.code AS motif_code, m.libelle AS motif_libelle, m.compte_dans_quota
             FROM planning p
             INNER JOIN semaine sem ON sem.id_semaine = p.id_semaine
             INNER JOIN structure s2 ON s2.id_structure = p.id_structure
             INNER JOIN creneau_horaire c ON c.id_planning = p.id_planning
             INNER JOIN motif_planning m ON m.id_motif = c.id_motif
             WHERE p.id_agent = :agent_id
               AND sem.annee = :annee
               AND sem.numero_semaine = :semaine
             ORDER BY c.date_jour, c.heure_debut, s2.nom"
        );
        $stmt->execute(['agent_id' => $agentId, 'annee' => $year, 'semaine' => $week]);
        return $stmt->fetchAll();
    }

    public function entriesForDateRange(int $agentId, string $startDate, string $endDate): array
    {
        $stmt = $this->pdo->prepare(
            "SELECT p.id_planning, p.statut,
                    s2.id_structure, s2.nom AS structure_nom,
                    s2.type_affectation AS structure_type_affectation,
                    c.id_creneau, c.id_motif, c.date_jour,
                    TIME_FORMAT(c.heure_debut, '%H:%i') AS heure_debut,
                    TIME_FORMAT(c.heure_fin, '%H:%i') AS heure_fin,
                    m.code AS motif_code, m.libelle AS motif_libelle, m.compte_dans_quota
             FROM planning p
             INNER JOIN structure s2 ON s2.id_structure = p.id_structure
             INNER JOIN creneau_horaire c ON c.id_planning = p.id_planning
             INNER JOIN motif_planning m ON m.id_motif = c.id_motif
             WHERE p.id_agent = :agent_id
               AND c.date_jour BETWEEN :date_debut AND :date_fin
             ORDER BY c.date_jour, c.heure_debut, s2.nom"
        );
        $stmt->execute([
            'agent_id' => $agentId,
            'date_debut' => $startDate,
            'date_fin' => $endDate,
        ]);
        return $stmt->fetchAll();
    }

    public function timeSummaryForRange(int $agentId, string $startDate, string $endDate): array
    {
        $stmt = $this->pdo->prepare(
            "SELECT UPPER(m.code) AS motif_code,
                    m.libelle AS motif_libelle,
                    m.compte_dans_quota,
                    COALESCE(SUM(TIMESTAMPDIFF(MINUTE, CONCAT(c.date_jour, ' ', c.heure_debut), CONCAT(c.date_jour, ' ', c.heure_fin))), 0) AS minutes_total,
                    COALESCE(SUM(CASE WHEN p.statut = 'VALIDE' THEN TIMESTAMPDIFF(MINUTE, CONCAT(c.date_jour, ' ', c.heure_debut), CONCAT(c.date_jour, ' ', c.heure_fin)) ELSE 0 END), 0) AS minutes_valides,
                    COALESCE(SUM(CASE WHEN p.statut = 'BROUILLON' THEN TIMESTAMPDIFF(MINUTE, CONCAT(c.date_jour, ' ', c.heure_debut), CONCAT(c.date_jour, ' ', c.heure_fin)) ELSE 0 END), 0) AS minutes_brouillon
             FROM planning p
             INNER JOIN creneau_horaire c ON c.id_planning = p.id_planning
             INNER JOIN motif_planning m ON m.id_motif = c.id_motif
             WHERE p.id_agent = :agent_id
               AND c.date_jour BETWEEN :date_debut AND :date_fin
             GROUP BY UPPER(m.code), m.libelle, m.compte_dans_quota
             ORDER BY m.compte_dans_quota DESC, m.libelle"
        );
        $stmt->execute([
            'agent_id' => $agentId,
            'date_debut' => $startDate,
            'date_fin' => $endDate,
        ]);
        return $stmt->fetchAll();
    }

    public function timeSummaryForYear(int $agentId, int $year): array
    {
        return $this->timeSummaryForRange($agentId, sprintf('%04d-01-01', $year), sprintf('%04d-12-31', $year));
    }
}