import AccountBalanceWalletOutlined from "@mui/icons-material/AccountBalanceWalletOutlined";
import PaidOutlined from "@mui/icons-material/PaidOutlined";
import MenuItem from "@mui/material/MenuItem";
import TextField from "@mui/material/TextField";
import { useCallback, useEffect, useState } from "react";
import { adjustSalaryWallet, listSalaryWalletHistory } from "@/features/host-org/api";
import styles from "@/features/host-org/host-org.module.css";
import {
    AdminFormAmountField,
    AdminFormDialog,
    AdminFormFieldGrid,
    AdminFormReadOnlyField,
    AdminFormSection,
} from "@/shared/ui/AdminFormDialog.jsx";
import { AdminActionIconButton } from "@/shared/ui/AdminListLayout.jsx";
import { DataState } from "@/shared/ui/DataState.jsx";
import { DataTable } from "@/shared/ui/DataTable.jsx";
import { SideDrawer } from "@/shared/ui/SideDrawer.jsx";
import { useToast } from "@/shared/ui/ToastProvider.jsx";
import { formatMillis } from "@/shared/utils/time.js";

const historyPageSize = 20;

const emptyHistory = { items: [], page: 1, pageSize: historyPageSize, total: 0 };

const emptyAdjustForm = () => ({
    amount: "",
    reason: "",
    type: "increase",
});

const historyColumns = [
    {
        key: "createdAtMs",
        label: "时间",
        render: (item) => formatMillis(item.createdAtMs),
        width: "minmax(170px, 0.9fr)",
    },
    {
        key: "amountMinor",
        label: "金额",
        render: (item) => <SalaryHistoryAmount item={item} />,
        width: "minmax(120px, 0.65fr)",
    },
    {
        key: "balance",
        label: "余额",
        render: (item) => formatSalaryWalletAmount(item.availableAfter),
        width: "minmax(120px, 0.65fr)",
    },
    {
        key: "bizType",
        label: "类型",
        render: (item) => salaryWalletBizLabel(item.bizType),
        width: "minmax(150px, 0.8fr)",
    },
    {
        key: "operator",
        label: "操作人",
        render: (item) => salaryWalletOperatorName(item),
        width: "minmax(150px, 0.8fr)",
    },
    {
        key: "reason",
        label: "原因",
        render: (item) => item.reason || "-",
        width: "minmax(220px, 1.15fr)",
    },
];

export function SalaryWalletCell({ role, userId, userLabel, wallet }) {
    const [open, setOpen] = useState(false);
    const balance = Number(wallet?.availableAmount || 0);

    return (
        <>
            <button
                className={styles.salaryWalletButton}
                type="button"
                onClick={() => setOpen(true)}
            >
                <span className={styles.salaryWalletAmount}>{formatSalaryWalletAmount(balance)}</span>
            </button>
            <SalaryWalletHistoryDrawer
                open={open}
                role={role}
                userId={userId}
                userLabel={userLabel}
                onClose={() => setOpen(false)}
            />
        </>
    );
}

export function SalaryWalletAdjustButton({ disabled = false, onAdjusted, role, userId, userLabel }) {
    const { showToast } = useToast();
    const [open, setOpen] = useState(false);
    const [submitting, setSubmitting] = useState(false);
    const [form, setForm] = useState(emptyAdjustForm);

    const close = () => {
        if (submitting) {
            return;
        }
        setOpen(false);
        setForm(emptyAdjustForm());
    };

    const submit = async (event) => {
        event.preventDefault();
        let amountMinor;
        try {
            amountMinor = parseSalaryUSDMinor(form.amount);
            if (!String(form.reason || "").trim()) {
                throw new Error("请填写原因");
            }
        } catch (err) {
            showToast(err.message || "工资操作参数不正确", "error");
            return;
        }

        setSubmitting(true);
        try {
            const result = await adjustSalaryWallet({
                amountMinor,
                commandId: makeSalaryWalletCommandId(role, userId),
                reason: String(form.reason || "").trim(),
                role,
                targetUserId: userId,
                type: form.type,
            });
            showToast("工资钱包已更新", "success");
            setOpen(false);
            setForm(emptyAdjustForm());
            await onAdjusted?.(result);
        } catch (err) {
            showToast(err.message || "工资钱包操作失败", "error");
        } finally {
            setSubmitting(false);
        }
    };

    return (
        <>
            <AdminActionIconButton
                disabled={disabled || !role || !userId}
                label="工资操作"
                onClick={() => setOpen(true)}
            >
                <PaidOutlined fontSize="small" />
            </AdminActionIconButton>
            <AdminFormDialog
                disabled={disabled}
                loading={submitting}
                open={open}
                size="large"
                submitDisabled={disabled || submitting || !role || !userId}
                submitLabel="确认"
                title="工资操作"
                onClose={close}
                onSubmit={submit}
            >
                <AdminFormSection title="目标身份">
                    <AdminFormFieldGrid columns="repeat(2, minmax(0, 1fr))">
                        <AdminFormReadOnlyField label="身份" value={salaryWalletRoleLabel(role)} />
                        <AdminFormReadOnlyField label="用户" value={userLabel || userId || "-"} />
                    </AdminFormFieldGrid>
                </AdminFormSection>
                <AdminFormSection title="操作信息">
                    <AdminFormFieldGrid columns="repeat(2, minmax(0, 1fr))">
                        <TextField
                            disabled={disabled || submitting}
                            label="类型"
                            required
                            select
                            value={form.type}
                            onChange={(event) => setForm((current) => ({ ...current, type: event.target.value }))}
                        >
                            <MenuItem value="increase">工资增加</MenuItem>
                            <MenuItem value="decrease">工资减少</MenuItem>
                        </TextField>
                        <AdminFormAmountField
                            disabled={disabled || submitting}
                            label="金额"
                            required
                            unit="USD"
                            value={form.amount}
                            onChange={(event) => setForm((current) => ({ ...current, amount: event.target.value }))}
                        />
                    </AdminFormFieldGrid>
                    <TextField
                        disabled={disabled || submitting}
                        label="原因"
                        multiline
                        minRows={3}
                        required
                        value={form.reason}
                        onChange={(event) => setForm((current) => ({ ...current, reason: event.target.value }))}
                    />
                </AdminFormSection>
            </AdminFormDialog>
        </>
    );
}

function SalaryWalletHistoryDrawer({ onClose, open, role, userId, userLabel }) {
    const [page, setPage] = useState(1);
    const [data, setData] = useState(emptyHistory);
    const [error, setError] = useState("");
    const [loading, setLoading] = useState(false);

    const loadHistory = useCallback(async () => {
        if (!open || !role || !userId) {
            return;
        }
        setError("");
        setLoading(true);
        try {
            const nextData = await listSalaryWalletHistory({
                page,
                page_size: historyPageSize,
                role,
                user_id: userId,
            });
            setData(nextData || emptyHistory);
        } catch (err) {
            setError(err.message || "加载工资钱包历史失败");
        } finally {
            setLoading(false);
        }
    }, [open, page, role, userId]);

    useEffect(() => {
        if (!open) {
            return;
        }
        void loadHistory();
    }, [loadHistory, open]);

    useEffect(() => {
        if (open) {
            setPage(1);
        }
    }, [open, role, userId]);

    const total = data.total || 0;

    return (
        <SideDrawer
            className={styles.salaryWalletDrawer}
            contentClassName={styles.salaryWalletDrawerBody}
            open={open}
            title={`工资钱包历史 - ${userLabel || userId || ""}`}
            width="wide"
            onClose={onClose}
        >
            <div className={styles.salaryWalletSummary}>
                <AccountBalanceWalletOutlined fontSize="small" />
                <span>{salaryWalletRoleLabel(role)}</span>
            </div>
            <DataState error={error} loading={loading} onRetry={loadHistory}>
                <DataTable
                    columns={historyColumns}
                    emptyLabel="暂无工资钱包历史"
                    items={data.items || []}
                    minWidth="930px"
                    pagination={
                        total > 0
                            ? {
                                  page,
                                  pageSize: data.pageSize || historyPageSize,
                                  total,
                                  onPageChange: setPage,
                              }
                            : undefined
                    }
                    rowKey={(item) => item.entryId || item.transactionId}
                />
            </DataState>
        </SideDrawer>
    );
}

function SalaryHistoryAmount({ item }) {
    const delta = Number(item.availableDelta ?? item.amountMinor ?? 0);
    const expense = delta < 0;
    return (
        <span className={expense ? styles.salaryWalletExpense : styles.salaryWalletIncome}>
            {expense ? "-" : "+"}
            {formatSalaryWalletAmount(Math.abs(delta))}
        </span>
    );
}

export function formatSalaryWalletAmount(value) {
    const minor = Number(value || 0);
    return `$${(minor / 100).toLocaleString("en-US", {
        maximumFractionDigits: 2,
        minimumFractionDigits: 2,
    })}`;
}

function parseSalaryUSDMinor(value) {
    const raw = String(value || "").trim();
    if (!/^\d+(\.\d{1,2})?$/.test(raw)) {
        throw new Error("请输入正确的 USD 金额，最多两位小数");
    }
    const [integerPart, decimalPart = ""] = raw.split(".");
    const amountMinor = Number(integerPart) * 100 + Number(decimalPart.padEnd(2, "0"));
    if (!Number.isSafeInteger(amountMinor) || amountMinor <= 0) {
        throw new Error("请输入大于 0 的工资金额");
    }
    return amountMinor;
}

function salaryWalletRoleLabel(role) {
    switch (role) {
        case "host":
            return "Host";
        case "agency":
            return "Agency";
        case "bd":
            return "BD";
        case "bd_leader":
            return "BD Leader";
        default:
            return role || "-";
    }
}

function salaryWalletBizLabel(value) {
    switch (value) {
        case "manual_credit":
            return "手工调整";
        case "salary_settlement":
        case "host_salary_settlement":
        case "team_salary_settlement":
            return "工资结算";
        case "transfer":
            return "转账";
        case "withdraw":
            return "提现";
        default:
            return value || "-";
    }
}

function salaryWalletOperatorName(item) {
    const operator = item.operator || {};
    return operator.name || operator.username || item.operatorUserId || "-";
}

function makeSalaryWalletCommandId(role, userId) {
    return `salary-wallet-${role || "role"}-${userId || "user"}-${Date.now()}`;
}