package api

import (
	"net/http"
	"strings"

	"github.com/gin-gonic/gin"
)

type createConfigInput struct {
	Name    string `json:"name" binding:"required"`
	Content string `json:"content"`
}

type updateConfigInput struct {
	Content string `json:"content" binding:"required"`
}

type duplicateConfigInput struct {
	NewName string `json:"new_name" binding:"required"`
}

func (h *Handler) ListConfigs(c *gin.Context) {
	configs, err := h.configs.List()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, configs)
}

func validateConfigName(name string) bool {
	return name != "" && !strings.ContainsAny(name, "/\\")
}

func (h *Handler) CreateConfig(c *gin.Context) {
	var input createConfigInput
	if err := c.ShouldBindJSON(&input); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	if !validateConfigName(input.Name) {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid config name"})
		return
	}
	if err := h.configs.Create(input.Name, input.Content); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusCreated, gin.H{"name": input.Name})
}

func (h *Handler) GetConfig(c *gin.Context) {
	name := c.Param("name")
	if !validateConfigName(name) {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid config name"})
		return
	}
	content, err := h.configs.Get(name)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
		return
	}
	c.String(http.StatusOK, content)
}

func (h *Handler) UpdateConfig(c *gin.Context) {
	var input updateConfigInput
	if err := c.ShouldBindJSON(&input); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	name := c.Param("name")
	if !validateConfigName(name) {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid config name"})
		return
	}
	if err := h.configs.Update(name, input.Content); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"status": "ok"})
}

func (h *Handler) DeleteConfig(c *gin.Context) {
	name := c.Param("name")
	if !validateConfigName(name) {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid config name"})
		return
	}
	if err := h.configs.Delete(name); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusNoContent, nil)
}

func (h *Handler) DuplicateConfig(c *gin.Context) {
	var input duplicateConfigInput
	if err := c.ShouldBindJSON(&input); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	name := c.Param("name")
	if !validateConfigName(name) || !validateConfigName(input.NewName) {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid config name"})
		return
	}
	if err := h.configs.Duplicate(name, input.NewName); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusCreated, gin.H{"name": input.NewName})
}