package webui

import (
    "encoding/json"
	"fmt"
	"net/http"
    "gitea.armuli.eu/museum-digital/museum-digital-webdav-uploader/src/configloader"
)

type updateSettingsResponse struct {
    Success bool `json:"success"`
    ValidationError string `json:"error"`
}

// Provides the API for updating the general configuration.
func serveApiUpdateSettings(w http.ResponseWriter, r *http.Request) {

	setHeadersForJson(w)

    // Parse POST data
    parseErr := r.ParseForm()
    if parseErr != nil {
        fmt.Println("Failed to load form data")
        return
    }

    // Load new config from a POST variable 'settings' that provides the full
    // settings as a JSON-encoded string.
    rawInputConfig := r.PostForm.Get("settings")
    var newConfig configloader.MDWebDavUploaderConfig
    unmarshalErr := json.Unmarshal([]byte(rawInputConfig), &newConfig)
    if unmarshalErr != nil {
        fmt.Fprint(w, "{\"success\": false, \"error\": \"Invalid input JSON\"}")
        return
    }

    // Attempt to store the new settings. Validation takes place while storing
    var output updateSettingsResponse
    validationErr := configloader.StoreConfigToFile(newConfig, "")
    if validationErr == nil {
        output = updateSettingsResponse{Success: true, ValidationError: ""}

        // Reload config
        config, setupRequired, _ = configloader.LoadFromFile("")

    } else {
        output = updateSettingsResponse{Success: false, ValidationError: validationErr.Error()}
    }

    // Format response in JSON, then print it
    outputJson, encodeErr := json.Marshal(output)
    if encodeErr != nil {
        panic("Failed to create JSON")
    }

	fmt.Fprint(w, string(outputJson))


}