/**
 * channel.js - 渠道管理逻辑（渠道列表 + 年度统计 + 效率数据）
 */
$(function () {
    renderShell('渠道管理', '业务模块 / 渠道管理');
    renderPage();
    initPage('channel', function (user) {
        if (!checkPagePermission('channel')) return;
        loadList(1);
        loadStats();
    });

    var currentPage = 1;
    var pageRows = [];

    /** 渲染页面内容（统计卡+工具栏+表格+分页） */
    function renderPage() {
        $('#page-content').html(
            '<div class="stat-cards" id="stat-summary"></div>' +
            '<div class="card">' +
            '  <div class="toolbar">' +
            '    <input type="text" data-filter="keyword" placeholder="渠道名称/联系人关键词">' +
            '    <input type="text" data-filter="channel_type" placeholder="渠道类型">' +
            '    <select id="year-select" data-filter="year"><option value="">选择年度</option></select>' +
            '    <button class="btn btn-primary" id="btn-search">搜索</button>' +
            '    <button class="btn" id="btn-reset">重置</button>' +
            '    <span class="spacer"></span>' +
            '    <button class="btn btn-success" id="btn-add">+ 新增</button>' +
            '  </div>' +
            '  <div class="table-wrap"><table class="grid">' +
            '    <thead><tr><th>ID</th><th>渠道名称</th><th>类型</th><th>联系人</th><th>电话</th><th>邮箱</th><th>效率评分</th><th>备注</th><th>创建时间</th><th>操作</th></tr></thead>' +
            '    <tbody id="channel-tbody"></tbody>' +
            '  </table></div>' +
            '  <div class="pagination" id="pagination"></div>' +
            '</div>'
        );
    }

    /* ---------- 列表 ---------- */
    function loadList(page) {
        currentPage = page;
        var params = buildFilterParam();
        delete params.year; // 年度仅用于统计
        params.page = page;
        params.limit = PAGE_SIZE;

        httpGet('channel/list.php', params).then(function (data) {
            var rows = data.list || [];
            pageRows = rows;
            var html = '';
            rows.forEach(function (r) {
                html += '<tr>' +
                    '<td>' + r.id + '</td>' +
                    '<td>' + escHtml(r.channel_name) + '</td>' +
                    '<td>' + escHtml(r.channel_type || '-') + '</td>' +
                    '<td>' + escHtml(r.contact_person || '-') + '</td>' +
                    '<td>' + escHtml(r.contact_phone || '-') + '</td>' +
                    '<td>' + escHtml(r.contact_email || '-') + '</td>' +
                    '<td>' + escHtml(r.efficiency_score) + '</td>' +
                    '<td title="' + escHtml(r.remark || '') + '">' + escHtml((r.remark || '-').substring(0, 20)) + '</td>' +
                    '<td>' + fmtDate(r.created_at) + '</td>' +
                    '<td class="ops"><a onclick="editChannel(' + r.id + ')">编辑</a>' +
                    '<a class="danger" onclick="delChannel(' + r.id + ')">删除</a></td></tr>';
            });
            if (!rows.length) {
                html = '<tr><td colspan="10" class="empty-tip" style="padding:40px 0;">暂无渠道数据（渠道表为新增加的业务表，可在 sql/system_tables.sql 中创建）</td></tr>';
            }
            $('#channel-tbody').html(html);
            renderPagination($('#pagination'), data, loadList);
        });
    }

    /* ---------- 年度统计 ---------- */
    function loadStats() {
        httpGet('channel/stats.php').then(function (data) {
            var years = data.years || [];
            var html = '<option value="">选择年度</option>';
            years.forEach(function (y) {
                html += '<option value="' + y + '"' + (y == data.year ? ' selected' : '') + '>' + y + '年</option>';
            });
            $('#year-select').html(html);

            $('#stat-summary').html(
                '<div class="stat-card c-blue"><div class="num">' + data.summary.channel_count + '</div><div class="label">' + data.year + '年渠道数</div></div>' +
                '<div class="stat-card c-green"><div class="num">' + data.summary.avg_score + '</div><div class="label">平均效率评分</div></div>' +
                '<div class="stat-card c-orange"><div class="num">' + data.summary.max_score + '</div><div class="label">最高评分</div></div>' +
                '<div class="stat-card c-red"><div class="num">' + data.summary.min_score + '</div><div class="label">最低评分</div></div>'
            );
            window._channelStatData = data;
        });
    }

    $('#year-select').on('change', function () {
        var y = $(this).val();
        if (!y) return;
        httpGet('channel/stats.php', { year: y }).then(function (data) {
            $('#stat-summary').html(
                '<div class="stat-card c-blue"><div class="num">' + data.summary.channel_count + '</div><div class="label">' + data.year + '年渠道数</div></div>' +
                '<div class="stat-card c-green"><div class="num">' + data.summary.avg_score + '</div><div class="label">平均效率评分</div></div>' +
                '<div class="stat-card c-orange"><div class="num">' + data.summary.max_score + '</div><div class="label">最高评分</div></div>' +
                '<div class="stat-card c-red"><div class="num">' + data.summary.min_score + '</div><div class="label">最低评分</div></div>'
            );
            window._channelStatData = data;
        });
    });

    /* ---------- 新增/编辑 ---------- */
    $('#btn-add').on('click', function () { openForm(null); });
    window.editChannel = function (id) {
        var row = null;
        pageRows.forEach(function (r) { if (r.id == id) row = r; });
        openForm(row);
    };

    function openForm(ch) {
        var isEdit = !!ch;
        var c = ch || {};
        var content =
            '<form id="channel-form" style="padding:18px 22px 4px;">' +
            '<div class="form-grid">' +
            '  <div class="form-item"><label>渠道名称<span class="req">*</span></label><input type="text" name="channel_name" value="' + escHtml(c.channel_name) + '"></div>' +
            '  <div class="form-item"><label>渠道类型</label><input type="text" name="channel_type" value="' + escHtml(c.channel_type) + '" placeholder="线上/线下/展会/转介绍"></div>' +
            '  <div class="form-item"><label>联系人</label><input type="text" name="contact_person" value="' + escHtml(c.contact_person) + '"></div>' +
            '  <div class="form-item"><label>联系电话</label><input type="text" name="contact_phone" value="' + escHtml(c.contact_phone) + '"></div>' +
            '  <div class="form-item"><label>联系邮箱</label><input type="text" name="contact_email" value="' + escHtml(c.contact_email) + '"></div>' +
            '  <div class="form-item"><label>效率评分(0-100)</label><input type="number" name="efficiency_score" min="0" max="100" step="0.01" value="' + escHtml(c.efficiency_score) + '"></div>' +
            '  <div class="form-item full"><label>备注</label><textarea name="remark">' + escHtml(c.remark) + '</textarea></div>' +
            '</div>' +
            '<div class="dialog-footer"><button type="button" class="btn" id="form-cancel">取消</button>' +
            '<button type="submit" class="btn btn-primary">保存</button></div>' +
            '</form>';

        var idx = Dialog.open({
            title: isEdit ? '编辑渠道' : '新增渠道',
            area: ['680px', 'auto'],
            content: content,
            btn: false
        });

        $('#form-cancel').on('click', function () { Dialog.close(idx); });

        $('#channel-form').on('submit', function (e) {
            e.preventDefault();
            var data = {};
            $(this).find('input, textarea').each(function () {
                var name = $(this).attr('name');
                if (!name) return;
                data[name] = $(this).val();
            });
            if (!data.channel_name) { Dialog.error('渠道名称为必填项'); return; }
            if (isEdit) data.id = c.id;

            httpPost(isEdit ? 'channel/save.php' : 'channel/save.php', data).then(function () {
                Dialog.success('保存成功', function () {
                    Dialog.close(idx);
                    loadList(currentPage);
                    loadStats();
                });
            });
        });
    }

    window.delChannel = function (id) {
        Dialog.confirm('确定删除该渠道吗？', function () {
            httpPost('channel/delete.php', { id: id }).then(function () {
                Dialog.success('删除成功', function () {
                    loadList(currentPage);
                    loadStats();
                });
            });
        });
    };
});