import Add from "@mui/icons-material/Add";
import EditOutlined from "@mui/icons-material/EditOutlined";
import { AdminSwitch } from "@/shared/ui/AdminSwitch.jsx";
import TextField from "@mui/material/TextField";
import Tooltip from "@mui/material/Tooltip";
import { formatMillis } from "@/shared/utils/time.js";
import { DataState } from "@/shared/ui/DataState.jsx";
import { IconButton } from "@/shared/ui/IconButton.jsx";
import { MultiValueAutocomplete } from "@/shared/ui/MultiValueAutocomplete.jsx";
import { regionStatusFilters } from "@/features/host-org/constants.js";
import { HostOrgActionModal } from "@/features/host-org/components/HostOrgActionModal.jsx";
import { HostOrgTable } from "@/features/host-org/components/HostOrgTable.jsx";
import { useHostRegionsPage } from "@/features/host-org/hooks/useHostRegionsPage.js";
import { createOptionsColumnFilter, createTextColumnFilter } from "@/shared/ui/tableFilters.js";
import styles from "@/features/host-org/host-org.module.css";

const baseRegionColumns = [
    { key: "regionId", label: "区域 ID", width: "minmax(90px, 0.6fr)" },
    { key: "regionCode", label: "区域编码", width: "minmax(110px, 0.8fr)" },
    { key: "name", label: "区域名称", width: "minmax(150px, 1fr)" },
    {
        key: "countries",
        label: "国家码",
        render: (item) => <CountryCodes countries={item.countries} />,
        width: "minmax(220px, 1.5fr)",
    },
    { key: "sortOrder", label: "排序", width: "minmax(80px, 0.5fr)" },
    {
        key: "updatedAtMs",
        label: "更新时间",
        render: (item) => formatMillis(item.updatedAtMs),
        width: "minmax(170px, 1fr)",
    },
];

export function HostRegionsPage() {
    const page = useHostRegionsPage();
    const createDisabled = !page.abilities.canCreate;
    const updateDisabled = !page.abilities.canUpdate;
    const items = page.data.items || [];
    const total = page.data.total || 0;
    const regionColumns = [
        ...baseRegionColumns.slice(0, 3),
        {
            key: "status",
            label: "状态",
            render: (item) => <RegionStatusSwitch item={item} page={page} />,
            filter: createOptionsColumnFilter({
                options: regionStatusFilters,
                placeholder: "搜索状态",
                value: page.status,
                onChange: page.changeStatus,
            }),
            width: "minmax(90px, 0.6fr)",
        },
        ...baseRegionColumns.slice(3),
    ].map((column) =>
        column.key === "regionCode"
            ? {
                  ...column,
                  filter: createTextColumnFilter({
                      placeholder: "搜索区域、国家码",
                      value: page.query,
                      onChange: page.changeQuery,
                  }),
              }
            : column,
    );
    const columns = page.abilities.canUpdate
        ? [
              ...regionColumns,
              {
                  key: "actions",
                  label: "操作",
                  render: (item) => <RegionActions item={item} page={page} />,
                  width: "minmax(80px, 0.5fr)",
              },
          ]
        : regionColumns;
    return (
        <section className={styles.root}>
            <div className={styles.contentPanel}>
                {page.abilities.canCreate ? (
                    <div className={styles.toolbar}>
                        <div className={styles.toolbarActions}>
                            <Tooltip arrow title="创建区域">
                                <span>
                                    <IconButton label="创建区域" onClick={page.openCreateRegion} sx={primaryActionSx}>
                                        <Add fontSize="small" />
                                    </IconButton>
                                </span>
                            </Tooltip>
                        </div>
                    </div>
                ) : null}

                <DataState error={page.error} loading={page.loading} onRetry={page.reload}>
                    <div className={styles.listBlock}>
                        <HostOrgTable
                            columns={columns}
                            items={items}
                            rowKey={(item) => item.regionId}
                            pagination={{ page: 1, pageSize: Math.max(items.length, 1), total }}
                        />
                    </div>
                </DataState>
            </div>

            <HostOrgActionModal
                disabled={page.activeAction === "edit" ? updateDisabled : createDisabled}
                loading={page.loadingAction === "region-create" || page.loadingAction === "region-edit"}
                open={page.activeAction === "create" || page.activeAction === "edit"}
                sectionTitle="区域信息"
                onClose={page.closeAction}
                onSubmit={page.submitRegion}
                title={page.activeAction === "edit" ? "编辑区域" : "创建区域"}
            >
                <TextField
                    disabled={page.activeAction === "edit" ? updateDisabled : createDisabled}
                    label="区域编码"
                    required
                    value={page.regionForm.regionCode}
                    onChange={(event) => page.setRegionForm({ ...page.regionForm, regionCode: event.target.value })}
                />
                <TextField
                    disabled={page.activeAction === "edit" ? updateDisabled : createDisabled}
                    label="区域名称"
                    required
                    value={page.regionForm.name}
                    onChange={(event) => page.setRegionForm({ ...page.regionForm, name: event.target.value })}
                />
                <TextField
                    disabled={page.activeAction === "edit" ? updateDisabled : createDisabled}
                    label="排序"
                    type="number"
                    value={page.regionForm.sortOrder}
                    onChange={(event) => page.setRegionForm({ ...page.regionForm, sortOrder: event.target.value })}
                />
                <CountryCodeSelect
                    disabled={
                        page.isGlobalRegionForm || (page.activeAction === "edit" ? updateDisabled : createDisabled)
                    }
                    label={page.isGlobalRegionForm ? "国家码" : "国家码 *"}
                    labels={page.countryLabels}
                    loading={page.loadingCountries}
                    options={page.countryOptions}
                    value={page.regionForm.countries}
                    onChange={(countries) => page.setRegionForm({ ...page.regionForm, countries })}
                />
            </HostOrgActionModal>
        </section>
    );
}

function RegionActions({ item, page }) {
    if (item.regionCode === "GLOBAL") {
        return "-";
    }
    return (
        <div className={styles.rowActions}>
            {page.abilities.canUpdate ? (
                <Tooltip arrow title="编辑区域">
                    <span>
                        <IconButton label="编辑区域" onClick={() => page.openEditRegion(item)}>
                            <EditOutlined fontSize="small" />
                        </IconButton>
                    </span>
                </Tooltip>
            ) : null}
        </div>
    );
}

function RegionStatusSwitch({ item, page }) {
    const checked = item.status === "active";
    const isGlobal = item.regionCode === "GLOBAL";
    return (
        <AdminSwitch
            checked={checked}
            disabled={isGlobal || !page.abilities.canStatus || page.loadingAction === `region-status-${item.regionId}`}
            inputProps={{ "aria-label": checked ? "停用区域" : "启用区域" }}
            onChange={(event) => page.toggleRegion(item, event.target.checked)}
        />
    );
}

function CountryCodeSelect({ disabled, label, labels, loading, onChange, options, value }) {
    const selected = value || [];
    const mergedOptions = [...new Set([...options, ...selected])].sort();
    return (
        <MultiValueAutocomplete
            disabled={disabled}
            label={label}
            labels={labels}
            loading={loading}
            options={mergedOptions}
            value={selected}
            onChange={onChange}
        />
    );
}

function CountryCodes({ countries = [] }) {
    const items = Array.isArray(countries) ? countries : [];
    if (!items.length) {
        return "-";
    }
    return (
        <div className="admin-tag-list">
            {items.map((country) => (
                <span className="admin-tag" key={country}>
                    {country}
                </span>
            ))}
        </div>
    );
}

const primaryActionSx = {
    borderColor: "var(--primary)",
    backgroundColor: "var(--primary)",
    color: "var(--active-contrast)",
    "&:hover": {
        borderColor: "var(--primary-strong)",
        backgroundColor: "var(--primary-strong)",
        color: "var(--active-contrast)",
    },
};