package controllers

import (
	"time"

	erp "server/services/erp"
)

// 移动端往来账与收付款接口。
//
// 往来账由单据生效时自动生成，手机端同样不开放手工新增/修改；
// 收付款单可以手工开草稿并确认核销，逻辑全部复用 erp_finance_core.go。

// AppErpFinanceController 往来账 / 收付款（移动端）
type AppErpFinanceController struct {
	AppErpBaseController
}

// BillList GET /api/erp/finance/bill/list 往来账（应收/应付）
func (c *AppErpFinanceController) BillList() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	page, pageSize := c.erpPage()
	f := erpBillFilter{
		BillType:    c.erpQuery("bill_type"),
		PartnerID:   c.erpUint("partner_id"),
		PartnerType: c.erpQuery("partner_type"),
		SourceDocID: c.erpUint("source_doc_id"),
		SettleState: c.erpQuery("settle_state"),
		Keyword:     c.erpQuery("keyword"),
		DateFrom:    c.erpQuery("date_from"),
		DateTo:      c.erpQuery("date_to"),
	}
	list, total, summary, code, msg := erpBillListCore(c.actor(cl), f, page, pageSize)
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpListOK(list, total, page, pageSize, map[string]interface{}{"summary": summary})
}

// BillDetail GET /api/erp/finance/bill/detail/:id 往来账详情（含核销记录与原单据）
func (c *AppErpFinanceController) BillDetail() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	data, code, msg := erpBillDetailCore(c.actor(cl), c.erpPathID())
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpOk(data)
}

// Aging GET /api/erp/finance/aging 账龄分析（按未结余额分桶）
func (c *AppErpFinanceController) Aging() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	data, code, msg := erpAgingCore(c.actor(cl))
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpOk(data)
}

// FundList GET /api/erp/finance/fund/list 收付款单列表
func (c *AppErpFinanceController) FundList() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	page, pageSize := c.erpPage()
	f := erpFundFilter{
		FundType:  c.erpQuery("fund_type"),
		Status:    c.erpQuery("status"),
		PartnerID: c.erpUint("partner_id"),
		Keyword:   c.erpQuery("keyword"),
		DateFrom:  c.erpQuery("date_from"),
		DateTo:    c.erpQuery("date_to"),
	}
	list, total, code, msg := erpFundListCore(c.actor(cl), f, page, pageSize)
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpListOK(list, total, page, pageSize, nil)
}

// FundDetail GET /api/erp/finance/fund/detail/:id 收付款单详情（含核销明细与原往来账）
func (c *AppErpFinanceController) FundDetail() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	data, code, msg := erpFundDetailCore(c.actor(cl), c.erpPathID())
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpOk(data)
}

// FundSave POST /api/erp/finance/fund/save 新建/修改收付款草稿
func (c *AppErpFinanceController) FundSave() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	var p erpFundPayload
	if !c.erpBody(&p, false) {
		return
	}
	id, fundNo, code, msg := erpFundSaveCore(c.actor(cl), p)
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpOk(map[string]interface{}{"id": id, "fund_no": fundNo})
}

// FundConfirm POST /api/erp/finance/fund/confirm/:id
// 确认收付款并核销；body 可选 settles=[{partner_bill_id,amount}]，不传则按到期日自动 FIFO。
func (c *AppErpFinanceController) FundConfirm() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	var body struct {
		Settles []erp.SettleItem `json:"settles"`
	}
	if !c.erpBody(&body, true) {
		return
	}
	code, msg := erpFundConfirmCore(c.actor(cl), c.erpPathID(), body.Settles)
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpOk(nil)
}

// FundVoid POST /api/erp/finance/fund/void/:id 作废收付款单（回滚核销）
func (c *AppErpFinanceController) FundVoid() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	code, msg := erpFundVoidCore(c.actor(cl), c.erpPathID())
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpOk(nil)
}

// FundDelete DELETE /api/erp/finance/fund/delete/:id 仅草稿可删
func (c *AppErpFinanceController) FundDelete() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	code, msg := erpFundDeleteCore(c.actor(cl), c.erpPathID())
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpOk(nil)
}

// FundOpenBills GET /api/erp/finance/fund/openBills?fund_type=&partner_id=
// 收款/付款时列出可核销的往来账，手机端据此勾选。
func (c *AppErpFinanceController) FundOpenBills() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	ft, _ := erpInt8Query(c.erpQuery("fund_type"))
	list, code, msg := erpFundOpenBillsCore(c.actor(cl), ft, c.erpUint("partner_id"))
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpOk(map[string]interface{}{"list": list})
}

// CashFlow GET /api/erp/finance/cashflow 资金流水（只统计实际收付）
func (c *AppErpFinanceController) CashFlow() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	// 与 Web 端一致：默认统计近 30 天
	from, to := time.Now().AddDate(0, 0, -30), time.Now()
	if d := c.erpQuery("date_from"); d != "" {
		if t, e := time.ParseInLocation("2006-01-02", d, time.Local); e == nil {
			from = t
		}
	}
	if d := c.erpQuery("date_to"); d != "" {
		if t, e := time.ParseInLocation("2006-01-02", d, time.Local); e == nil {
			to = t
		}
	}
	data, code, msg := erpCashFlowCore(c.actor(cl), from, to)
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpOk(data)
}

// PartnerSummary GET /api/erp/finance/partner 往来单位对账汇总
func (c *AppErpFinanceController) PartnerSummary() {
	cl, err := c.erpClaims()
	if c.erpDenied(err) {
		return
	}
	data, code, msg := erpPartnerSummaryCore(c.actor(cl), c.erpQuery("partner_type"))
	if msg != "" {
		c.erpFail(code, code, msg)
		return
	}
	c.erpOk(data)
}