package main

import (
	"gorm.io/driver/postgres"
	"gorm.io/gen"
	"gorm.io/gen/field"
	"gorm.io/gorm"
	"gorm.io/gorm/schema"
)

var g *gen.Generator

func main() {

	// 初始化

	db, _ := gorm.Open(
		postgres.Open("host=localhost user=test password=test dbname=app port=5432 sslmode=disable TimeZone=Asia/Shanghai"),
		&gorm.Config{
			NamingStrategy: schema.NamingStrategy{
				SingularTable: true,
			},
		},
	)

	g = gen.NewGenerator(gen.Config{
		OutPath:      "web/queries",
		ModelPkgPath: "models",
		Mode:         gen.WithDefaultQuery | gen.WithoutContext,
	})
	g.UseDB(db)

	// 生成模型
	common := []gen.ModelOpt{
		gen.FieldModify(func(field gen.Field) gen.Field {
			if field.Type == "time.Time" {
				field.Type = "common.LocalDateTime"
			}
			return field
		}),
	}

	customs := make(map[string]any)

	resourcePss := g.GenerateModel("resource_pss", common...)
	customs["resource_pss"] = resourcePss

	resource := g.GenerateModel("resource", append(common,
		gen.FieldRelate(field.HasOne, "Pss", resourcePss, &field.RelateConfig{
			RelatePointer: true,
			GORMTag: field.GormTag{
				"foreignKey": []string{"ResourceID"},
				"references": []string{"ID"},
			},
		}),
	)...)
	customs["resource"] = resource

	trade := g.GenerateModel("trade", common...)
	customs["trade"] = trade

	refund := g.GenerateModel("refund", common...)
	customs["refund"] = refund

	bill := g.GenerateModel("bill", append(common,
		gen.FieldRelate(field.BelongsTo, "Trade", trade, &field.RelateConfig{
			RelatePointer: true,
			GORMTag: field.GormTag{
				"foreignKey": []string{"TradeID"},
			},
		}),
		gen.FieldRelate(field.BelongsTo, "Refund", refund, &field.RelateConfig{
			RelatePointer: true,
			GORMTag: field.GormTag{
				"foreignKey": []string{"RefundID"},
			},
		}),
		gen.FieldRelate(field.BelongsTo, "Resource", resource, &field.RelateConfig{
			RelatePointer: true,
			GORMTag: field.GormTag{
				"foreignKey": []string{"ResourceID"},
			},
		}),
	)...)
	customs["bill"] = bill

	tables, _ := db.Migrator().GetTables()
	models := make([]interface{}, len(tables))
	for i, name := range tables {
		if customs[name] != nil {
			models[i] = customs[name]
			continue
		}
		models[i] = genBasic(name, common...)
	}

	g.ApplyBasic(models...)

	// 生成查询

	g.Execute()
}

func genBasic(name string, opts ...gen.ModelOpt) any {
	return g.GenerateModel(name,
		gen.FieldType("created_at", "common.LocalDateTime"),
		gen.FieldType("updated_at", "common.LocalDateTime"),
	)
}