package renewchange

import (
	"context"
	"strings"

	"github.com/gogf/gf/v2/database/gdb"
	"github.com/gogf/gf/v2/errors/gerror"

	rc "git.5iot.com/iotlcm-public/iotlcm-worker-svr/internal/repository/renewchange"
)

type renewEffectivePriceStore interface {
	LoadDept(ctx context.Context, tenantID string, deptID int64) (*rc.SysDeptRow, error)
	LoadPriceOverride(ctx context.Context, tenantID string, deptID, targetAgentID int64, scopeType int, packageCode string) (*rc.FlowPackagePrice, error)
}

type renewEffectivePriceRule struct {
	PriceSource         string
	AgentDefaultPriceId int64
	TargetPriceId       int64
	AgentCostRatio      float64
	AgentCostProfit     float64
}

type renewEffectiveSalePrice struct {
	BaseAgentCost      float64
	Rule               renewEffectivePriceRule
	AgentShipmentPrice float64
}

type EffectivePriceStore = renewEffectivePriceStore
type EffectivePriceRule = renewEffectivePriceRule
type EffectiveSalePrice = renewEffectiveSalePrice

type renewTxEffectivePriceStore struct {
	tx gdb.TX
}

func (s renewTxEffectivePriceStore) LoadDept(ctx context.Context, tenantID string, deptID int64) (*rc.SysDeptRow, error) {
	return loadRenewDeptTx(ctx, s.tx, tenantID, deptID)
}

func (s renewTxEffectivePriceStore) LoadPriceOverride(ctx context.Context, tenantID string, deptID, targetAgentID int64, scopeType int, packageCode string) (*rc.FlowPackagePrice, error) {
	return loadRenewPriceOverrideTx(ctx, s.tx, tenantID, deptID, targetAgentID, scopeType, packageCode)
}

func ResolveEffectiveSalePrice(ctx context.Context, store EffectivePriceStore, tenantID string, ownerDeptID int64, targetDeptID int64, pkg *rc.FlowPackageInfo) (EffectiveSalePrice, error) {
	return resolveRenewEffectiveSalePrice(ctx, store, tenantID, ownerDeptID, targetDeptID, pkg)
}

func resolveRenewEffectiveSalePrice(ctx context.Context, store renewEffectivePriceStore, tenantID string, ownerDeptID int64, targetDeptID int64, pkg *rc.FlowPackageInfo) (renewEffectiveSalePrice, error) {
	baseCost, err := resolveRenewEffectiveBaseCost(ctx, store, tenantID, ownerDeptID, pkg, make(map[int64]struct{}))
	if err != nil {
		return renewEffectiveSalePrice{}, err
	}
	rule, err := resolveRenewEffectivePriceRule(ctx, store, tenantID, ownerDeptID, targetDeptID, pkg)
	if err != nil {
		return renewEffectiveSalePrice{}, err
	}
	return renewEffectiveSalePrice{
		BaseAgentCost:      baseCost,
		Rule:               rule,
		AgentShipmentPrice: rc.RoundAmount(baseCost*rule.AgentCostRatio + rule.AgentCostProfit),
	}, nil
}

func resolveRenewEffectiveBaseCost(ctx context.Context, store renewEffectivePriceStore, tenantID string, deptID int64, pkg *rc.FlowPackageInfo, visited map[int64]struct{}) (float64, error) {
	if pkg == nil || strings.TrimSpace(pkg.PackageCode) == "" {
		return 0, gerror.New("套餐编码不能为空")
	}
	if deptID <= 0 {
		return rc.RoundAmount(pkg.CostPrice), nil
	}
	if _, ok := visited[deptID]; ok {
		return 0, gerror.New("组织定价层级存在循环，无法计算生效成本")
	}
	visited[deptID] = struct{}{}

	dept, err := store.LoadDept(ctx, tenantID, deptID)
	if err != nil {
		return 0, err
	}
	if dept == nil || dept.ParentId <= 0 {
		return rc.RoundAmount(pkg.CostPrice), nil
	}

	parentBaseCost, err := resolveRenewEffectiveBaseCost(ctx, store, tenantID, dept.ParentId, pkg, visited)
	if err != nil {
		return 0, err
	}
	parentRule, err := resolveRenewEffectivePriceRule(ctx, store, tenantID, dept.ParentId, deptID, pkg)
	if err != nil {
		return 0, err
	}
	return rc.RoundAmount(parentBaseCost*parentRule.AgentCostRatio + parentRule.AgentCostProfit), nil
}

func resolveRenewEffectivePriceRule(ctx context.Context, store renewEffectivePriceStore, tenantID string, ownerDeptID int64, targetDeptID int64, pkg *rc.FlowPackageInfo) (renewEffectivePriceRule, error) {
	rule := renewSystemPriceRule(pkg)
	if ownerDeptID <= 0 {
		return rule, nil
	}
	if targetDeptID > 0 {
		targetPrice, err := store.LoadPriceOverride(ctx, tenantID, ownerDeptID, targetDeptID, PriceScopeTargetAgent, pkg.PackageCode)
		if err != nil {
			return rule, err
		}
		if targetPrice != nil {
			return renewRuleFromOverride(PriceSourceTarget, targetPrice), nil
		}
	}
	defaultPrice, err := store.LoadPriceOverride(ctx, tenantID, ownerDeptID, 0, PriceScopeAgentDefault, pkg.PackageCode)
	if err != nil {
		return rule, err
	}
	if defaultPrice != nil {
		return renewRuleFromOverride(PriceSourceAgentDefault, defaultPrice), nil
	}
	return rule, nil
}

func renewSystemPriceRule(pkg *rc.FlowPackageInfo) renewEffectivePriceRule {
	if pkg == nil {
		return renewEffectivePriceRule{PriceSource: PriceSourceSystem}
	}
	return renewEffectivePriceRule{
		PriceSource:     PriceSourceSystem,
		AgentCostRatio:  normalizePriceRatio(pkg.SysDefaultRatio),
		AgentCostProfit: pkg.SysDefaultProfit,
	}
}

func renewRuleFromOverride(source string, price *rc.FlowPackagePrice) renewEffectivePriceRule {
	rule := renewEffectivePriceRule{
		PriceSource:     source,
		AgentCostRatio:  normalizePriceRatio(price.AgentCostRatio),
		AgentCostProfit: price.AgentCostProfit,
	}
	if source == PriceSourceTarget {
		rule.TargetPriceId = price.Id
	} else {
		rule.AgentDefaultPriceId = price.Id
	}
	return rule
}