package gas

import (
	"errors"
	"strings"
	"time"

	"git.apinb.com/bsm-sdk/core/errcode"
	"git.apinb.com/bsm-sdk/core/infra"
	"git.apinb.com/heqiapp/platforms/backend/api/internal/impl"
	"git.apinb.com/heqiapp/platforms/backend/api/internal/logic/common"
	"git.apinb.com/heqiapp/platforms/backend/api/internal/models"
	"github.com/gin-gonic/gin"
	"gorm.io/gorm"
	"gorm.io/gorm/clause"
)

// ListGasBasic 查询可燃气体站分页列表。
func ListGasBasic(ctx *gin.Context) { common.ListPage[models.GasBasic](ctx) }

// GetGasBasic 查询一个可燃气体站。
func GetGasBasic(ctx *gin.Context) { common.GetByIdentity[models.GasBasic](ctx) }

// CreateGasBasic 创建可燃气体站档案。
func CreateGasBasic(ctx *gin.Context) {
	var request models.GasBasic
	if err := ctx.ShouldBindJSON(&request); err != nil || request.Code == "" || request.Name == "" {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	request.Entity = common.NewEntity(common.StatusDraft)
	if err := impl.DBService.Create(&request).Error; err != nil {
		infra.Response.Error(ctx, err)
		return
	}
	common.RespondCreatedResource(ctx, request)
}

// UpdateGasBasic 更新可燃气体站基础资料。
func UpdateGasBasic(ctx *gin.Context) {
	var request struct {
		Name       string `json:"name" binding:"required,max=128"`
		CreditCode string `json:"credit_code" binding:"max=64"`
		Principal  string `json:"principal" binding:"max=64"`
		Address    string `json:"address" binding:"max=255"`
		Longitude  string `json:"longitude" binding:"max=32"`
		Latitude   string `json:"latitude" binding:"max=32"`
	}
	if err := ctx.ShouldBindJSON(&request); err != nil {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	common.UpdateAllowedByIdentity(ctx, &models.GasBasic{}, gin.H{"name": request.Name, "credit_code": request.CreditCode, "principal": request.Principal, "address": request.Address, "longitude": request.Longitude, "latitude": request.Latitude}, []string{"name", "credit_code", "principal", "address", "longitude", "latitude"})
}

// UpdateGasBasicStatus 仅允许已审核气站在启用和停用之间切换。
func UpdateGasBasicStatus(ctx *gin.Context) {
	var request struct {
		Status int `json:"status" binding:"required"`
	}
	if err := ctx.ShouldBindJSON(&request); err != nil ||
		(request.Status != common.StatusEnable && request.Status != common.StatusDisable) {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	result := impl.DBService.Model(&models.GasBasic{}).
		Where("identity = ? AND status IN ?", ctx.Param("identity"), []int{common.StatusEnable, common.StatusDisable}).
		Update("status", request.Status)
	if result.Error != nil {
		infra.Response.Error(ctx, result.Error)
		return
	}
	if result.RowsAffected != 1 {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	infra.Response.Success(ctx, gin.H{"updated": true})
}

// ReviewGasBasic 审核待审核气站；不通过时必须填写理由。
func ReviewGasBasic(ctx *gin.Context) {
	var request struct {
		Approved bool   `json:"approved"`
		Reason   string `json:"reason" binding:"max=2000"`
	}
	if err := ctx.ShouldBindJSON(&request); err != nil ||
		(!request.Approved && strings.TrimSpace(request.Reason) == "") {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}

	operatorIdentity, operatorName := common.PlatformOperator(ctx)
	targetStatus := common.StatusDisable
	reviewStatus := common.StatusRejected
	if request.Approved {
		targetStatus = common.StatusEnable
		reviewStatus = common.StatusApproved
	}
	now := time.Now()
	err := impl.DBService.Transaction(func(tx *gorm.DB) error {
		var station models.GasBasic
		if err := tx.Clauses(clause.Locking{Strength: "UPDATE"}).
			Where("identity = ? AND status <> ?", ctx.Param("identity"), common.StatusArchived).
			First(&station).Error; err != nil {
			return err
		}
		if station.Status != common.StatusDraft {
			return errors.New("gas station is not pending review")
		}
		if err := tx.Model(&station).Update("status", targetStatus).Error; err != nil {
			return err
		}
		review := models.GasBasicReview{
			Entity:           common.NewEntity(common.StatusEnable),
			GasBasicID:       station.ID,
			ReviewStatus:     reviewStatus,
			ReviewReason:     strings.TrimSpace(request.Reason),
			ReviewerIdentity: operatorIdentity,
			ReviewerName:     operatorName,
			ReviewedAt:       now,
		}
		return tx.Create(&review).Error
	})
	if err != nil {
		common.RespondRecordError(ctx, err)
		return
	}
	infra.Response.Success(ctx, gin.H{"updated": true, "status": targetStatus})
}