"use client";

import { useCallback, useEffect, useMemo, useState } from "react";
import {
  App,
  Button,
  Card,
  Form,
  Input,
  Popconfirm,
  Select,
  Space,
  Spin,
  Tag,
  Typography,
} from "antd";
import {
  createImapFilterApi,
  deleteImapFilterApi,
  getImapPullSettingsApi,
  updateImapFilterApi,
  updateImapPollIntervalApi,
} from "@/lib/client-api";
import type { ImapFilterKind, ImapFilterRuleItem } from "@/types";

const INTERVAL_PRESETS: Array<{ label: string; value: number }> = [
  { label: "3 分钟", value: 3 * 60_000 },
  { label: "5 分钟", value: 5 * 60_000 },
  { label: "10 分钟", value: 10 * 60_000 },
  { label: "15 分钟", value: 15 * 60_000 },
  { label: "30 分钟（默认）", value: 30 * 60_000 },
  { label: "1 小时", value: 60 * 60_000 },
  { label: "6 小时", value: 6 * 60 * 60_000 },
  { label: "12 小时", value: 12 * 60 * 60_000 },
  { label: "24 小时", value: 24 * 60 * 60_000 },
  { label: "3 天", value: 3 * 24 * 60 * 60_000 },
  { label: "7 天", value: 7 * 24 * 60 * 60_000 },
];

const KIND_ORDER: ImapFilterKind[] = [
  "keyword",
  "sender_whitelist",
  "sender_blacklist",
  "keyword_blacklist",
];

const KIND_LABEL: Record<string, string> = {
  keyword: "关键词（白）",
  sender_whitelist: "发件人白名单",
  sender_blacklist: "发件人黑名单",
  keyword_blacklist: "关键词黑名单",
};

const KIND_COLOR: Record<string, string> = {
  keyword: "blue",
  sender_whitelist: "green",
  sender_blacklist: "magenta",
  keyword_blacklist: "orange",
};

const KIND_OPTIONS = KIND_ORDER.map((value) => ({
  value,
  label: KIND_LABEL[value],
}));

export function ImapPullSettingsCard() {
  const { message } = App.useApp();
  const [loading, setLoading] = useState(true);
  const [savingInterval, setSavingInterval] = useState(false);
  const [adding, setAdding] = useState(false);
  const [intervalMs, setIntervalMs] = useState(30 * 60_000);
  const [filters, setFilters] = useState<ImapFilterRuleItem[]>([]);
  const [form] = Form.useForm<{ kind: ImapFilterKind; value: string }>();

  const grouped = useMemo(() => {
    const map = new Map<string, ImapFilterRuleItem[]>();
    for (const kind of KIND_ORDER) map.set(kind, []);
    for (const f of filters) {
      const list = map.get(f.kind) || [];
      list.push(f);
      map.set(f.kind, list);
    }
    return KIND_ORDER.map((kind) => ({
      kind,
      label: KIND_LABEL[kind],
      color: KIND_COLOR[kind] || "default",
      items: map.get(kind) || [],
    })).filter((g) => g.items.length > 0);
  }, [filters]);

  const reload = useCallback(async () => {
    setLoading(true);
    const res = await getImapPullSettingsApi();
    setLoading(false);
    if (!res.ok) {
      message.error(res.error.message);
      return;
    }
    setIntervalMs(res.data.poll_interval_ms);
    setFilters(res.data.filters || []);
  }, [message]);

  useEffect(() => {
    void reload();
  }, [reload]);

  const onSaveInterval = async () => {
    setSavingInterval(true);
    const res = await updateImapPollIntervalApi(intervalMs);
    setSavingInterval(false);
    if (!res.ok) {
      message.error(res.error.message);
      return;
    }
    message.success("拉取间隔已保存（worker 下一轮生效）");
    setIntervalMs(res.data.poll_interval_ms);
  };

  const onAdd = async () => {
    const values = await form.validateFields();
    setAdding(true);
    const res = await createImapFilterApi({
      kind: values.kind,
      value: values.value,
      enabled: true,
    });
    setAdding(false);
    if (!res.ok) {
      message.error(res.error.message);
      return;
    }
    message.success("已添加规则");
    form.resetFields(["value"]);
    void reload();
  };

  const onToggle = async (row: ImapFilterRuleItem) => {
    const res = await updateImapFilterApi(row.id, { enabled: !row.enabled });
    if (!res.ok) message.error(res.error.message);
    else void reload();
  };

  const onDelete = async (row: ImapFilterRuleItem) => {
    const res = await deleteImapFilterApi(row.id);
    if (!res.ok) message.error(res.error.message);
    else {
      message.success("已删除");
      void reload();
    }
  };

  return (
    <Card title="自动拉取">
      <Spin spinning={loading}>
        <div>
          <Space wrap align="center" size={8} style={{ marginBottom: 12 }}>
            <Typography.Text>拉取间隔</Typography.Text>
            <Select
              style={{ width: 180 }}
              value={intervalMs}
              options={INTERVAL_PRESETS}
              onChange={(v) => setIntervalMs(v)}
            />
            <Button
              type="primary"
              size="small"
              loading={savingInterval}
              onClick={() => void onSaveInterval()}
            >
              保存间隔
            </Button>
          </Space>

          <Typography.Text strong style={{ display: "block", marginBottom: 8 }}>
            过滤规则
          </Typography.Text>
          <Form
            form={form}
            layout="inline"
            style={{ marginBottom: 10 }}
            initialValues={{ kind: "keyword" }}
          >
            <Form.Item
              name="kind"
              rules={[{ required: true, message: "选择类型" }]}
              style={{ marginBottom: 8 }}
            >
              <Select style={{ width: 140 }} options={KIND_OPTIONS} />
            </Form.Item>
            <Form.Item
              name="value"
              rules={[{ required: true, message: "填写内容" }]}
              style={{ marginBottom: 8 }}
            >
              <Input
                placeholder="关键词或发件人邮箱"
                style={{ width: 220 }}
                allowClear
              />
            </Form.Item>
            <Form.Item style={{ marginBottom: 8 }}>
              <Button
                type="primary"
                size="small"
                loading={adding}
                onClick={() => void onAdd()}
              >
                添加
              </Button>
            </Form.Item>
          </Form>

          {filters.length === 0 ? (
            <Typography.Text type="secondary" style={{ fontSize: 12 }}>
              暂无规则（将使用业务相关兜底）
            </Typography.Text>
          ) : (
            <div style={{ display: "flex", flexDirection: "column", gap: 8 }}>
              {grouped.map((g) => (
                <div
                  key={g.kind}
                  style={{
                    display: "flex",
                    flexWrap: "wrap",
                    alignItems: "center",
                    gap: 6,
                  }}
                >
                  <Typography.Text
                    type="secondary"
                    style={{
                      fontSize: 12,
                      width: 96,
                      flexShrink: 0,
                      lineHeight: "22px",
                    }}
                  >
                    {g.label}
                  </Typography.Text>
                  {g.items.map((f) => (
                    <Tag
                      key={f.id}
                      color={f.enabled ? g.color : undefined}
                      closable
                      closeIcon={
                        <Popconfirm
                          title="删除该规则？"
                          onConfirm={() => void onDelete(f)}
                          okText="删除"
                          cancelText="取消"
                        >
                          <span
                            role="button"
                            aria-label="删除"
                            onClick={(e) => e.stopPropagation()}
                          >
                            ×
                          </span>
                        </Popconfirm>
                      }
                      onClose={(e) => e.preventDefault()}
                      onClick={() => void onToggle(f)}
                      style={{
                        cursor: "pointer",
                        marginInlineEnd: 0,
                        opacity: f.enabled ? 1 : 0.45,
                        textDecoration: f.enabled ? "none" : "line-through",
                        userSelect: "none",
                      }}
                      title={f.enabled ? "点击停用" : "点击启用"}
                    >
                      {f.value}
                    </Tag>
                  ))}
                </div>
              ))}
            </div>
          )}
        </div>
      </Spin>
    </Card>
  );
}