package staff

import (
	"strconv"
	"strings"

	"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/logic/upload"
	"git.apinb.com/heqiapp/platforms/backend/api/internal/models"
	"github.com/gin-gonic/gin"
)

type staffListFilters struct {
	RoleCodes  []string
	Status     *int
	WorkStatus string
}

type staffOrganizationFilters struct {
	GasIdentity        string
	DeliveryIdentity   string
	GasUnassigned      bool
	DeliveryUnassigned bool
}

// parseStaffListFilters 将工作人员列表查询参数收敛为闭集条件，拒绝含糊或冲突值。
func parseStaffListFilters(roleCode, roleCodes, status, workStatus string) (staffListFilters, bool) {
	filters := staffListFilters{}
	roleCode = strings.TrimSpace(roleCode)
	roleCodes = strings.TrimSpace(roleCodes)
	if roleCode != "" && roleCodes != "" {
		return filters, false
	}
	if roleCode != "" {
		filters.RoleCodes = []string{roleCode}
	} else if roleCodes != "" {
		seen := map[string]bool{}
		for _, value := range strings.Split(roleCodes, ",") {
			value = strings.TrimSpace(value)
			if value == "" || seen[value] {
				return staffListFilters{}, false
			}
			seen[value] = true
			filters.RoleCodes = append(filters.RoleCodes, value)
		}
	}
	for _, value := range filters.RoleCodes {
		if !validStaffRole(value) {
			return staffListFilters{}, false
		}
	}
	status = strings.TrimSpace(status)
	if status != "" {
		value, err := strconv.Atoi(status)
		if err != nil || !common.IsGenericRecordStatus(value) || value == common.StatusArchived {
			return staffListFilters{}, false
		}
		filters.Status = &value
	}
	workStatus = strings.TrimSpace(workStatus)
	if workStatus != "" && !validWorkStatus(workStatus) {
		return staffListFilters{}, false
	}
	filters.WorkStatus = workStatus
	return filters, true
}

// parseStaffOrganizationFilters 解析服务关系下拉使用的精确组织范围，并拒绝相互冲突的条件。
func parseStaffOrganizationFilters(gasIdentity, deliveryIdentity, gasUnassigned, deliveryUnassigned string) (staffOrganizationFilters, bool) {
	filters := staffOrganizationFilters{
		GasIdentity:      strings.TrimSpace(gasIdentity),
		DeliveryIdentity: strings.TrimSpace(deliveryIdentity),
	}
	if strings.Contains(filters.GasIdentity, ",") || strings.Contains(filters.DeliveryIdentity, ",") {
		return staffOrganizationFilters{}, false
	}
	parseUnassigned := func(value string) (bool, bool) {
		value = strings.TrimSpace(value)
		if value == "" {
			return false, true
		}
		return value == "1", value == "1"
	}
	var ok bool
	filters.GasUnassigned, ok = parseUnassigned(gasUnassigned)
	if !ok {
		return staffOrganizationFilters{}, false
	}
	filters.DeliveryUnassigned, ok = parseUnassigned(deliveryUnassigned)
	if !ok || filters.GasIdentity != "" && filters.GasUnassigned || filters.DeliveryIdentity != "" && filters.DeliveryUnassigned {
		return staffOrganizationFilters{}, false
	}
	return filters, true
}

// ListStaff 查询服务人员分页列表，并应用调用方显式声明的角色与在岗状态条件。
func ListStaff(ctx *gin.Context) {
	filters, ok := parseStaffListFilters(
		ctx.Query("role_code"),
		ctx.Query("role_codes"),
		ctx.Query("status"),
		ctx.Query("work_status"),
	)
	if !ok {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	organizationFilters, ok := parseStaffOrganizationFilters(
		ctx.Query("gas_basic_identities"),
		ctx.Query("delivery_basic_identities"),
		ctx.Query("gas_basic_unassigned"),
		ctx.Query("delivery_basic_unassigned"),
	)
	if !ok {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	page, size := common.PageSize(ctx)
	var list []models.StaffAccount
	var total int64
	query := common.ActiveRecords(impl.DBService.Model(&models.StaffAccount{}))
	if len(filters.RoleCodes) > 0 {
		query = query.Where("role_code IN ?", filters.RoleCodes)
	}
	if filters.Status != nil {
		query = query.Where("status = ?", *filters.Status)
	}
	if filters.WorkStatus != "" {
		query = query.Where("work_status = ?", filters.WorkStatus)
	}
	if organizationFilters.GasIdentity != "" {
		query = query.Where(
			"gas_basic_id IN (SELECT id FROM gas_basic WHERE identity = ? AND status <> ?)",
			organizationFilters.GasIdentity,
			common.StatusArchived,
		)
	} else if organizationFilters.GasUnassigned {
		query = query.Where("gas_basic_id = 0")
	}
	if organizationFilters.DeliveryIdentity != "" {
		query = query.Where(
			"delivery_basic_id IN (SELECT id FROM delivery_basic WHERE identity = ? AND status <> ?)",
			organizationFilters.DeliveryIdentity,
			common.StatusArchived,
		)
	} else if organizationFilters.DeliveryUnassigned {
		query = query.Where("delivery_basic_id = 0")
	}
	query = common.ApplyKeywordFilter(ctx, query, &models.StaffAccount{})
	if err := query.Count(&total).Error; err != nil {
		infra.Response.Error(ctx, err)
		return
	}
	if err := query.Order("created_at desc").Offset((page - 1) * size).Limit(size).Find(&list).Error; err != nil {
		infra.Response.Error(ctx, err)
		return
	}
	response, err := common.PublicResourceResponse(list)
	if err != nil {
		infra.Response.Error(ctx, err)
		return
	}
	infra.Response.Success(ctx, gin.H{"total": total, "list": common.ProtectPreciseLocation(ctx, &models.StaffAccount{}, response)})
}

// GetStaff 查询一个服务人员档案。
func GetStaff(ctx *gin.Context) { common.GetByIdentity[models.StaffAccount](ctx) }

// GetStaffAvatar 返回已鉴权工作人员资料页使用的头像二进制内容。
func GetStaffAvatar(ctx *gin.Context) {
	var account models.StaffAccount
	if err := common.ActiveRecords(impl.DBService).Select("avatar").Where("identity = ?", ctx.Param("identity")).First(&account).Error; err != nil {
		common.RespondRecordError(ctx, err)
		return
	}
	upload.ServeAvatar(ctx, account.Avatar)
}

// CreateStaff 创建服务人员档案。
func CreateStaff(ctx *gin.Context) {
	var request struct {
		Username              string `json:"username" binding:"required,max=64"`
		Password              string `json:"password" binding:"required"`
		Name                  string `json:"name" binding:"required,max=64"`
		Phone                 string `json:"phone" binding:"max=32"`
		Avatar                string `json:"avatar" binding:"max=512"`
		RoleCode              string `json:"role_code" binding:"max=64"`
		GasBasicIdentity      string `json:"gas_basic_identity"`
		DeliveryBasicIdentity string `json:"delivery_basic_identity"`
		WorkStatus            string `json:"work_status" binding:"max=32"`
	}
	if err := ctx.ShouldBindJSON(&request); err != nil ||
		!common.IsValidAccountPassword(request.Password) ||
		!validStaffRole(request.RoleCode) {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	hash, err := common.PasswordHash(request.Password)
	if err != nil {
		infra.Response.Error(ctx, err)
		return
	}
	gasBasicID, err := common.ResolveIdentityID(&models.GasBasic{}, request.GasBasicIdentity, false)
	if err != nil {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	deliveryBasicID, err := common.ResolveIdentityID(&models.DeliveryBasic{}, request.DeliveryBasicIdentity, false)
	if err != nil {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	if !common.ValidateOrganizationIDs(gasBasicID, deliveryBasicID, 0) {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	staff := models.StaffAccount{Entity: common.NewEntity(common.StatusDraft), Username: request.Username, PasswordHash: hash, Name: request.Name, Phone: request.Phone, Avatar: request.Avatar, RoleCode: request.RoleCode, GasBasicID: gasBasicID, DeliveryBasicID: deliveryBasicID, WorkStatus: request.WorkStatus}
	if staff.WorkStatus == "" {
		staff.WorkStatus = "off_duty"
	}
	if !validWorkStatus(staff.WorkStatus) {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	if err := common.CreateStaffRecord(&staff); err != nil {
		infra.Response.Error(ctx, err)
		return
	}
	common.RespondCreatedResource(ctx, staff)
}

// UpdateStaff 更新服务人员档案。
func UpdateStaff(ctx *gin.Context) {
	var request struct {
		Name                  string  `json:"name" binding:"required,max=64"`
		Phone                 string  `json:"phone" binding:"max=32"`
		Avatar                *string `json:"avatar" binding:"omitempty,max=512"`
		RoleCode              string  `json:"role_code" binding:"max=64"`
		GasBasicIdentity      string  `json:"gas_basic_identity"`
		DeliveryBasicIdentity string  `json:"delivery_basic_identity"`
		WorkStatus            string  `json:"work_status" binding:"max=32"`
	}
	if err := ctx.ShouldBindJSON(&request); err != nil || !validWorkStatus(request.WorkStatus) || !validStaffRole(request.RoleCode) {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	gasBasicID, err := common.ResolveIdentityID(&models.GasBasic{}, request.GasBasicIdentity, false)
	if err != nil {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	deliveryBasicID, err := common.ResolveIdentityID(&models.DeliveryBasic{}, request.DeliveryBasicIdentity, false)
	if err != nil {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	if !common.ValidateOrganizationIDs(gasBasicID, deliveryBasicID, 0) {
		infra.Response.Error(ctx, errcode.ErrInvalidArgument)
		return
	}
	values := gin.H{"name": request.Name, "phone": request.Phone, "role_code": request.RoleCode, "gas_basic_id": gasBasicID, "delivery_basic_id": deliveryBasicID, "work_status": request.WorkStatus}
	// 未选择新头像时不提交 avatar，避免普通资料编辑误清空现有头像。
	if request.Avatar != nil {
		values["avatar"] = *request.Avatar
	}
	common.UpdateAllowedByIdentityWithError(ctx, &models.StaffAccount{}, values, []string{"name", "phone", "avatar", "role_code", "gas_basic_id", "delivery_basic_id", "work_status"}, common.StaffWriteError)
}

func validWorkStatus(status string) bool { return status == "on_duty" || status == "off_duty" }
func validStaffRole(role string) bool {
	return role == "installer" || role == "delivery" || role == "operations"
}