package model

import (
	"errors"

	"github.com/gin-gonic/gin"
	json "github.com/json-iterator/go"
	dbModel "github.com/synctv-org/synctv/internal/model"
	"google.golang.org/grpc/connectivity"
)

var ErrInvalidID = errors.New("invalid id")

type AdminSettingsReq map[string]any

func (asr *AdminSettingsReq) Validate() error {
	return nil
}

func (asr *AdminSettingsReq) Decode(ctx *gin.Context) error {
	return json.NewDecoder(ctx.Request.Body).Decode(asr)
}

type AdminSettingsResp map[dbModel.SettingGroup]map[string]any

type AddUserReq struct {
	Username string       `json:"username"`
	Password string       `json:"password"`
	Role     dbModel.Role `json:"role"`
}

func (aur *AddUserReq) Validate() error {
	if aur.Username == "" {
		return errors.New("username is empty")
	} else if len(aur.Username) > 32 {
		return ErrUsernameTooLong
	} else if !alnumPrintHanReg.MatchString(aur.Username) {
		return ErrUsernameHasInvalidChar
	}

	if aur.Password == "" {
		return FormatEmptyPasswordError("user")
	} else if len(aur.Password) > 32 {
		return ErrPasswordTooLong
	} else if !alnumPrintReg.MatchString(aur.Password) {
		return ErrPasswordHasInvalidChar
	}

	return nil
}

func (aur *AddUserReq) Decode(ctx *gin.Context) error {
	return json.NewDecoder(ctx.Request.Body).Decode(aur)
}

type AdminUserPasswordReq struct {
	ID       string `json:"id"`
	Password string `json:"password"`
}

func (aur *AdminUserPasswordReq) Validate() error {
	if aur.ID == "" {
		return ErrInvalidID
	}

	if aur.Password == "" {
		return FormatEmptyPasswordError("user")
	} else if len(aur.Password) > 32 {
		return ErrPasswordTooLong
	} else if !alnumPrintReg.MatchString(aur.Password) {
		return ErrPasswordHasInvalidChar
	}

	return nil
}

func (aur *AdminUserPasswordReq) Decode(ctx *gin.Context) error {
	return json.NewDecoder(ctx.Request.Body).Decode(aur)
}

type AdminUsernameReq struct {
	ID       string `json:"id"`
	Username string `json:"username"`
}

func (aur *AdminUsernameReq) Validate() error {
	if aur.ID == "" {
		return ErrInvalidID
	}

	if aur.Username == "" {
		return errors.New("username is empty")
	} else if len(aur.Username) > 32 {
		return ErrUsernameTooLong
	} else if !alnumPrintHanReg.MatchString(aur.Username) {
		return ErrUsernameHasInvalidChar
	}

	return nil
}

func (aur *AdminUsernameReq) Decode(ctx *gin.Context) error {
	return json.NewDecoder(ctx.Request.Body).Decode(aur)
}

type AdminRoomPasswordReq struct {
	ID       string `json:"id"`
	Password string `json:"password"`
}

func (aur *AdminRoomPasswordReq) Validate() error {
	if aur.ID == "" {
		return ErrInvalidID
	}

	if aur.Password == "" {
		return FormatEmptyPasswordError("room")
	} else if len(aur.Password) > 32 {
		return ErrPasswordTooLong
	} else if !alnumPrintReg.MatchString(aur.Password) {
		return ErrPasswordHasInvalidChar
	}

	return nil
}

func (aur *AdminRoomPasswordReq) Decode(ctx *gin.Context) error {
	return json.NewDecoder(ctx.Request.Body).Decode(aur)
}

type GetVendorBackendResp struct {
	Info   *dbModel.VendorBackend `json:"info"`
	Status connectivity.State     `json:"status"`
}

type AddVendorBackendReq dbModel.VendorBackend

func (avbr *AddVendorBackendReq) Validate() error {
	if avbr.UsedBy.AlistBackendName != "" {
		if !alnumPrintHanReg.MatchString(avbr.UsedBy.AlistBackendName) {
			return errors.New("alist backend name has invalid char")
		}
	}
	if avbr.UsedBy.BilibiliBackendName != "" {
		if !alnumPrintHanReg.MatchString(avbr.UsedBy.BilibiliBackendName) {
			return errors.New("bilibili backend name has invalid char")
		}
	}
	if avbr.UsedBy.EmbyBackendName != "" {
		if !alnumPrintHanReg.MatchString(avbr.UsedBy.EmbyBackendName) {
			return errors.New("emby backend name has invalid char")
		}
	}
	return avbr.Backend.Validate()
}

func (avbr *AddVendorBackendReq) Decode(ctx *gin.Context) error {
	return json.NewDecoder(ctx.Request.Body).Decode(avbr)
}

type VendorBackendEndpointsReq struct {
	Endpoints []string `json:"endpoints"`
}

func (dvbr *VendorBackendEndpointsReq) Validate() error {
	if len(dvbr.Endpoints) == 0 {
		return errors.New("endpoints is empty")
	}
	return nil
}

func (dvbr *VendorBackendEndpointsReq) Decode(ctx *gin.Context) error {
	return json.NewDecoder(ctx.Request.Body).Decode(dvbr)
}

type SendTestEmailReq struct {
	Email string `json:"email"`
}

func (ster *SendTestEmailReq) Validate() error {
	if ster.Email != "" && !emailReg.MatchString(ster.Email) {
		return errors.New("invalid email")
	}
	return nil
}

func (ster *SendTestEmailReq) Decode(ctx *gin.Context) error {
	return json.NewDecoder(ctx.Request.Body).Decode(ster)
}