const API_BASE_URL = 'https://monpetitpari.fr/api';

async function apiCall(endpoint, method = 'GET', data = null) {
    const options = {
        method: method,
        headers: { 'Content-Type': 'application/json' }
    };
    const token = localStorage.getItem('authToken');
    if (token) options.headers['Authorization'] = `Bearer ${token}`;
    if (data && (method === 'POST' || method === 'PUT')) {
        options.body = JSON.stringify(data);
    }
    const response = await fetch(`${API_BASE_URL}/${endpoint}`, options);
    const result = await response.json();
    if (!response.ok) throw new Error(result.error || 'Erreur serveur');
    return result;
}

window.onload = function() {
    const user = JSON.parse(localStorage.getItem('currentUser'));
    if (!user || user.role !== 'admin') {
        window.location.href = 'index.html';
        return;
    }
    document.getElementById('adminName').textContent = user.username;
    loadAdminStats();
};

function logout() {
    localStorage.removeItem('currentUser');
    localStorage.removeItem('authToken');
    window.location.href = 'index.html';
}

function showAdminSection(sectionId) {
    document.querySelectorAll('.section').forEach(s => s.classList.remove('active'));
    document.querySelectorAll('.sidebar li').forEach(l => l.classList.remove('active'));
    document.getElementById(sectionId).classList.add('active');
    if (window.event && window.event.target) {
        window.event.target.closest('li').classList.add('active');
    }
    if (sectionId === 'matches') {
        loadMatchesTable();
        loadPlayersDropdowns();
    }
    if (sectionId === 'users') loadUsersTable();
    if (sectionId === 'results') loadResultsDropdown();
}

async function loadAdminStats() {
    try {
        const users = await apiCall('users.php');
        const matches = await apiCall('matches.php');
        const players = await apiCall('player.php');
        document.getElementById('totalUsers').textContent = users.users ? users.users.length : 0;
        document.getElementById('totalMatches').textContent = matches.matches ? matches.matches.length : 0;
        document.getElementById('totalPlayers').textContent = players.players ? players.players.length : 0;
    } catch (error) {
        console.error('Erreur stats admin', error);
    }
}

async function loadPlayersDropdowns() {
    try {
        const result = await apiCall('player.php');
        const p1Select = document.getElementById('matchPlayer1');
        const p2Select = document.getElementById('matchPlayer2');
        if (!p1Select || !p2Select) return;
        p1Select.innerHTML = '';
        p2Select.innerHTML = '';
        if (result.players) {
            result.players.forEach(p => {
                const opt1 = document.createElement('option');
                opt1.value = p.id;
                opt1.textContent = `${p.name} (#${p.ranking})`;
                p1Select.appendChild(opt1);
                const opt2 = document.createElement('option');
                opt2.value = p.id;
                opt2.textContent = `${p.name} (#${p.ranking})`;
                p2Select.appendChild(opt2);
            });
        }
    } catch (e) {
        console.error('Erreur chargement joueurs:', e);
    }
}

async function addMatch() {
    const round = document.getElementById('matchRound').value;
    const player1_id = parseInt(document.getElementById('matchPlayer1').value);
    const player2_id = parseInt(document.getElementById('matchPlayer2').value);
    const match_date = document.getElementById('matchDate').value;
    const court = document.getElementById('matchCourt').value || 'Court Philippe-Chatrier';

    if (!match_date || isNaN(player1_id) || isNaN(player2_id)) {
        alert('Veuillez remplir tous les champs requis.');
        return;
    }
    if (player1_id === player2_id) {
        alert('Veuillez sélectionner deux joueurs différents.');
        return;
    }
    try {
        await apiCall('matches.php', 'POST', { round, player1_id, player2_id, match_date, court });
        alert('Match ajouté avec succès !');
        loadMatchesTable();
        loadAdminStats();
    } catch (error) {
        alert(error.message);
    }
}

async function addPlayer() {
    const name = document.getElementById('playerName').value.trim();
    const nationality = document.getElementById('playerNationality').value.trim();
    const age = parseInt(document.getElementById('playerAge').value);
    const handedness = document.getElementById('playerHandedness').value;
    const ranking = parseInt(document.getElementById('playerRanking').value);

    if (!name || !nationality || isNaN(age) || isNaN(ranking)) {
        alert('Veuillez remplir tous les champs requis.');
        return;
    }
    const player_code = name.toLowerCase().replace(/[^a-z0-9]/g, '');
    try {
        await apiCall('player.php', 'POST', {
            player_code, name, nationality, age, handedness, ranking,
            points: 0, clay_win_rate: 0.75, hard_win_rate: 0.70, grass_win_rate: 0.65
        });
        alert('Joueur ajouté avec succès !');
        document.getElementById('playerName').value = '';
        document.getElementById('playerNationality').value = '';
        document.getElementById('playerAge').value = '';
        document.getElementById('playerRanking').value = '';
        loadAdminStats();
    } catch (error) {
        alert(error.message);
    }
}

async function loadMatchesTable() {
    try {
        const result = await apiCall('matches.php');
        const tbody = document.getElementById('matchesTable');
        if (!tbody) return;
        tbody.innerHTML = '';
        if (result.matches) {
            result.matches.forEach(match => {
                const row = document.createElement('tr');
                const p1Name = match.p1_name || (match.player1 && match.player1.name) || 'Inconnu';
                const p2Name = match.p2_name || (match.player2 && match.player2.name) || 'Inconnu';
                row.innerHTML = `
                    <td>${match.round}</td>
                    <td>${p1Name}</td>
                    <td>${p2Name}</td>
                    <td>${new Date(match.match_date || match.date).toLocaleDateString('fr-FR')}</td>
                    <td>${match.status === 'completed' ? 'Terminé' : 'À venir'}</td>
                    <td><button class="btn-danger" onclick="deleteMatch(${match.id})">Supprimer</button></td>
                `;
                tbody.appendChild(row);
            });
        }
    } catch (e) { console.error(e); }
}

async function loadUsersTable() {
    try {
        const result = await apiCall('users.php');
        const tbody = document.getElementById('usersTable');
        if (!tbody) return;
        tbody.innerHTML = '';
        if (result.users) {
            result.users.forEach(user => {
                const row = document.createElement('tr');
                row.innerHTML = `
                    <td>${user.id}</td>
                    <td>${user.username}</td>
                    <td>${user.email}</td>
                    <td>${user.role}</td>
                    <td>${user.points || 0}</td>
                    <td><button class="btn-danger" onclick="deleteUser(${user.id})">Supprimer</button></td>
                `;
                tbody.appendChild(row);
            });
        }
    } catch (e) { console.error(e); }
}

async function deleteUser(id) {
    if (confirm('Êtes-vous sûr de vouloir supprimer cet utilisateur ?')) {
        try {
            await apiCall(`users.php?id=${id}`, 'DELETE');
            loadUsersTable();
            loadAdminStats();
        } catch (e) { alert(e.message); }
    }
}

async function deleteMatch(id) {
    if (confirm('Êtes-vous sûr de vouloir supprimer ce match ?')) {
        try {
            await apiCall(`matches.php?id=${id}`, 'DELETE');
            loadMatchesTable();
            loadAdminStats();
        } catch (e) { alert(e.message); }
    }
}

async function loadResultsDropdown() {
    try {
        const result = await apiCall('matches.php');
        const select = document.getElementById('resultMatch');
        if (!select) return;
        select.innerHTML = '';
        window.currentAdminMatches = result.matches || [];
        window.currentAdminMatches.filter(m => m.status !== 'completed').forEach(match => {
            const option = document.createElement('option');
            option.value = match.id;
            const p1Name = match.p1_name || (match.player1 && match.player1.name);
            const p2Name = match.p2_name || (match.player2 && match.player2.name);
            option.textContent = `${match.round} : ${p1Name} vs ${p2Name}`;
            select.appendChild(option);
        });
        updateWinnerSelect();
        select.addEventListener('change', updateWinnerSelect);
    } catch (e) { console.error(e); }
}

function updateWinnerSelect() {
    const select = document.getElementById('resultMatch');
    const winnerSelect = document.getElementById('resultWinner');
    if (select.selectedIndex === -1 || !window.currentAdminMatches) return;
    const matchId = parseInt(select.value);
    const match = window.currentAdminMatches.find(m => m.id === matchId);
    winnerSelect.innerHTML = '';
    if (match) {
        const p1Id = match.p1_id || (match.player1 && match.player1.id);
        const p1Name = match.p1_name || (match.player1 && match.player1.name);
        const p2Id = match.p2_id || (match.player2 && match.player2.id);
        const p2Name = match.p2_name || (match.player2 && match.player2.name);
        winnerSelect.innerHTML = `
            <option value="${p1Id}">${p1Name}</option>
            <option value="${p2Id}">${p2Name}</option>
        `;
    }
}

async function updateResult() {
    const matchId = parseInt(document.getElementById('resultMatch').value);
    const winnerId = parseInt(document.getElementById('resultWinner').value);
    const score = document.getElementById('resultScore').value;
    try {
        await apiCall('results.php', 'POST', { match_id: matchId, winner_id: winnerId, score: score });
        alert('Résultat mis à jour avec succès ! Les points ont été distribués.');
        loadResultsDropdown();
    } catch (error) {
        alert(error.message);
    }
}