package api

import (
	"fmt"
	"net/http"
	"strings"

	"github.com/gin-gonic/gin"
	"github.com/go-gost/x/config"
	parser "github.com/go-gost/x/config/parsing/sd"
	"github.com/go-gost/x/registry"
)

// swagger:parameters getSDListRequest
type getSDListRequest struct {
}

// successful operation.
// swagger:response getSDListResponse
type getSDListResponse struct {
	// in: body
	Data sdList
}

type sdList struct {
	Count int                       `json:"count"`
	List  []*config.SDConfig `json:"list"`
}

func getSDList(ctx *gin.Context) {
	// swagger:route GET /config/sds SD getSDListRequest
	//
	// Get sd list.
	//
	//     Security:
	//       basicAuth: []
	//
	//     Responses:
	//       200: getSDListResponse

	var req getSDListRequest
	ctx.ShouldBindQuery(&req)

	list := config.Global().SDs

	var resp getSDListResponse
	resp.Data = sdList{
		Count: len(list),
		List:  list,
	}

	ctx.JSON(http.StatusOK, Response{
		Data: resp.Data,
	})
}

// swagger:parameters getSDRequest
type getSDRequest struct {
	// in: path
	// required: true
	SD string `uri:"sd" json:"sd"`
}

// successful operation.
// swagger:response getSDResponse
type getSDResponse struct {
	// in: body
	Data *config.SDConfig
}

func getSD(ctx *gin.Context) {
	// swagger:route GET /config/sds/{sd} SD getSDRequest
	//
	// Get sd.
	//
	//     Security:
	//       basicAuth: []
	//
	//     Responses:
	//       200: getSDResponse

	var req getSDRequest
	ctx.ShouldBindUri(&req)

	var resp getSDResponse

	for _, sd := range config.Global().SDs {
		if sd == nil {
			continue
		}
		if sd.Name == req.SD {
			resp.Data = sd
		}
	}

	ctx.JSON(http.StatusOK, Response{
		Data: resp.Data,
	})
}

// swagger:parameters createSDRequest
type createSDRequest struct {
	// in: body
	Data config.SDConfig `json:"data"`
}

// successful operation.
// swagger:response createSDResponse
type createSDResponse struct {
	Data Response
}

func createSD(ctx *gin.Context) {
	// swagger:route POST /config/sds SD createSDRequest
	//
	// Create a new SD, the name of the SD must be unique in SD list.
	//
	//     Security:
	//       basicAuth: []
	//
	//     Responses:
	//       200: createSDResponse

	var req createSDRequest
	ctx.ShouldBindJSON(&req.Data)

	name := strings.TrimSpace(req.Data.Name)
	if name == "" {
		writeError(ctx, NewError(http.StatusBadRequest, ErrCodeInvalid, "sd name is required"))
		return
	}
	req.Data.Name = name

	if registry.SDRegistry().IsRegistered(name) {
		writeError(ctx, NewError(http.StatusBadRequest, ErrCodeDup, fmt.Sprintf("sd %s already exists", name)))
		return
	}

	v := parser.ParseSD(&req.Data)

	if err := registry.SDRegistry().Register(name, v); err != nil {
		writeError(ctx, NewError(http.StatusBadRequest, ErrCodeDup, fmt.Sprintf("sd %s already exists", name)))
		return
	}

	config.OnUpdate(func(c *config.Config) error {
		c.SDs = append(c.SDs, &req.Data)
		return nil
	})

	ctx.JSON(http.StatusOK, Response{
		Msg: "OK",
	})
}

// swagger:parameters updateSDRequest
type updateSDRequest struct {
	// in: path
	// required: true
	SD string `uri:"sd" json:"sd"`
	// in: body
	Data config.SDConfig `json:"data"`
}

// successful operation.
// swagger:response updateSDResponse
type updateSDResponse struct {
	Data Response
}

func updateSD(ctx *gin.Context) {
	// swagger:route PUT /config/sds/{sd} SD updateSDRequest
	//
	// Update SD by name, the SD must already exist.
	//
	//     Security:
	//       basicAuth: []
	//
	//     Responses:
	//       200: updateSDResponse

	var req updateSDRequest
	ctx.ShouldBindUri(&req)
	ctx.ShouldBindJSON(&req.Data)

	name := strings.TrimSpace(req.SD)

	if !registry.SDRegistry().IsRegistered(name) {
		writeError(ctx, NewError(http.StatusBadRequest, ErrCodeNotFound, fmt.Sprintf("sd %s not found", name)))
		return
	}

	req.Data.Name = name

	v := parser.ParseSD(&req.Data)

	registry.SDRegistry().Unregister(name)

	if err := registry.SDRegistry().Register(name, v); err != nil {
		writeError(ctx, NewError(http.StatusBadRequest, ErrCodeDup, fmt.Sprintf("sd %s already exists", name)))
		return
	}

	config.OnUpdate(func(c *config.Config) error {
		for i := range c.SDs {
			if c.SDs[i].Name == name {
				c.SDs[i] = &req.Data
				break
			}
		}
		return nil
	})

	ctx.JSON(http.StatusOK, Response{
		Msg: "OK",
	})
}

// swagger:parameters deleteSDRequest
type deleteSDRequest struct {
	// in: path
	// required: true
	SD string `uri:"sd" json:"sd"`
}

// successful operation.
// swagger:response deleteSDResponse
type deleteSDResponse struct {
	Data Response
}

func deleteSD(ctx *gin.Context) {
	// swagger:route DELETE /config/sds/{sd} SD deleteSDRequest
	//
	// Delete SD by name.
	//
	//     Security:
	//       basicAuth: []
	//
	//     Responses:
	//       200: deleteSDResponse

	var req deleteSDRequest
	ctx.ShouldBindUri(&req)

	name := strings.TrimSpace(req.SD)

	if !registry.SDRegistry().IsRegistered(name) {
		writeError(ctx, NewError(http.StatusBadRequest, ErrCodeNotFound, fmt.Sprintf("sd %s not found", name)))
		return
	}
	registry.SDRegistry().Unregister(name)

	config.OnUpdate(func(c *config.Config) error {
		sds := c.SDs
		c.SDs = nil
		for _, s := range sds {
			if s.Name == name {
				continue
			}
			c.SDs = append(c.SDs, s)
		}
		return nil
	})

	ctx.JSON(http.StatusOK, Response{
		Msg: "OK",
	})
}