package admin

import (
	"net/http"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/gothinkster/golang-gin-realworld-example-app/common"
	"github.com/gothinkster/golang-gin-realworld-example-app/models"
)

func ListAssets(c *gin.Context) {
	db := common.GetDB()
	p := ParsePagination(c)

	query := db.Model(&models.Asset{})
	if v := c.Query("name"); v != "" {
		query = query.Where("name LIKE ?", "%"+v+"%")
	}
	if v := c.Query("asset_code"); v != "" {
		query = query.Where("asset_code LIKE ?", "%"+v+"%")
	}
	if v := c.Query("category"); v != "" {
		query = query.Where("category = ?", v)
	}
	if v := c.Query("is_active"); v != "" {
		query = query.Where("is_active = ?", v == "true")
	}

	var total int64
	query.Count(&total)

	var items []models.Asset
	if err := query.Order("id DESC").Offset(p.Offset()).Limit(p.PageSize).Find(&items).Error; err != nil {
		Fail(c, http.StatusInternalServerError, "Failed to fetch assets")
		return
	}
	OKList(c, items, total)
}

func GetAsset(c *gin.Context) {
	db := common.GetDB()
	var item models.Asset
	if err := db.First(&item, c.Param("id")).Error; err != nil {
		Fail(c, http.StatusNotFound, "Asset not found")
		return
	}
	OK(c, item)
}

func CreateAsset(c *gin.Context) {
	db := common.GetDB()
	var item models.Asset
	if err := BindJSONFlexTime(c, &item); err != nil {
		Fail(c, http.StatusBadRequest, err.Error())
		return
	}
	item.ID = 0
	// 合约地址唯一性校验（非空才校验）
	if item.ContractAddress != "" {
		var conflict models.Asset
		if err := db.Where("contract_address = ?", item.ContractAddress).First(&conflict).Error; err == nil {
			Fail(c, http.StatusConflict, "合约地址已被资产「"+conflict.Name+"」使用，请检查后重试")
			return
		}
	}
	now := time.Now()
	if item.CreatedAt.IsZero() {
		item.CreatedAt = now
	}
	item.UpdatedAt = now
	if err := db.Create(&item).Error; err != nil {
		Fail(c, http.StatusInternalServerError, err.Error())
		return
	}
	LogOp(c, "create", "asset", "create_asset", &item.ID, item)
	OK(c, item)
}

func UpdateAsset(c *gin.Context) {
	db := common.GetDB()
	var existing models.Asset
	if err := db.First(&existing, c.Param("id")).Error; err != nil {
		Fail(c, http.StatusNotFound, "Asset not found")
		return
	}
	var item models.Asset
	if err := BindJSONFlexTime(c, &item); err != nil {
		Fail(c, http.StatusBadRequest, err.Error())
		return
	}
	item.ID = existing.ID
	// 合约地址唯一性校验（非空且与原值不同时校验）
	if item.ContractAddress != "" && item.ContractAddress != existing.ContractAddress {
		var conflict models.Asset
		if err := db.Where("contract_address = ? AND id != ?", item.ContractAddress, existing.ID).First(&conflict).Error; err == nil {
			Fail(c, http.StatusConflict, "合约地址已被资产「"+conflict.Name+"」使用，请检查后重试")
			return
		}
	}
	if existing.CreatedAt.IsZero() {
		item.CreatedAt = time.Now()
	} else {
		item.CreatedAt = existing.CreatedAt
	}
	if err := db.Save(&item).Error; err != nil {
		Fail(c, http.StatusInternalServerError, err.Error())
		return
	}
	LogOp(c, "update", "asset", "update_asset", &item.ID, item)
	OK(c, item)
}

func DeleteAsset(c *gin.Context) {
	db := common.GetDB()
	var item models.Asset
	if err := db.First(&item, c.Param("id")).Error; err != nil {
		Fail(c, http.StatusNotFound, "Asset not found")
		return
	}
	if err := db.Delete(&item).Error; err != nil {
		Fail(c, http.StatusInternalServerError, err.Error())
		return
	}
	LogOp(c, "delete", "asset", "delete_asset", &item.ID, nil)
	OK(c, gin.H{"message": "deleted"})
}