package api

import (
	"fmt"
	"gardomatic.kleiax.de/internal/platform/validate"
	"gardomatic.kleiax.de/internal/storage"
	"net/http"
	"strings"
)

type careInstructionInput struct {
	Text   *string `json:"text"`
	Status *string `json:"status"`
}

func (i careInstructionInput) apply(v *storage.CareInstruction) {
	if i.Text != nil {
		v.Text = strings.TrimSpace(*i.Text)
	}
	if i.Status != nil {
		v.Status = *i.Status
	}
}
func (app *application) validateCareInstruction(w http.ResponseWriter, r *http.Request, item storage.CareInstruction) bool {
	v := validate.New()
	storage.ValidateCareInstruction(v, item)
	if !v.Valid() {
		app.failedValidationResponse(w, r, v.Errors)
		return false
	}
	return true
}
func (app *application) listCareInstructionsHandler(w http.ResponseWriter, r *http.Request) {
	g, _ := app.readGardenIDParam(r)
	s, e := app.readIDParam(r)
	if e != nil {
		app.notFoundResponse(w, r)
		return
	}
	items, e := app.models.CareInstructions.GetAllForSpecies(g, s)
	if e != nil {
		app.respondToEntityModelError(w, r, e)
		return
	}
	if e = app.writeJSON(w, http.StatusOK, envelope{"care_instructions": items}, nil); e != nil {
		app.serverErrorResponse(w, r, e)
	}
}
func (app *application) createCareInstructionHandler(w http.ResponseWriter, r *http.Request) {
	g, _ := app.readGardenIDParam(r)
	s, e := app.readIDParam(r)
	if e != nil {
		app.notFoundResponse(w, r)
		return
	}
	if !app.canWriteCareInstructions(w, r, g, s) {
		return
	}
	var input careInstructionInput
	if e = app.readJSON(w, r, &input); e != nil {
		app.badRequestResponse(w, r, e)
		return
	}
	u, _ := app.contextGetAuthenticatedUser(r)
	item := storage.CareInstruction{SpeciesID: s, Status: "untested", CreatedBy: u.ID, UpdatedBy: u.ID}
	input.apply(&item)
	if !app.validateCareInstruction(w, r, item) {
		return
	}
	item, e = app.models.CareInstructions.Insert(item)
	if e != nil {
		app.respondToEntityModelError(w, r, e)
		return
	}
	h := make(http.Header)
	h.Set("Location", fmt.Sprintf("/v1/gardens/%d/species/%d/care-instructions/%d", g, s, item.ID))
	_ = app.writeJSON(w, http.StatusCreated, envelope{"care_instruction": item}, h)
}
func (app *application) updateCareInstructionHandler(w http.ResponseWriter, r *http.Request) {
	g, _ := app.readGardenIDParam(r)
	s, e := app.readIDParam(r)
	if e != nil {
		app.notFoundResponse(w, r)
		return
	}
	if !app.canWriteCareInstructions(w, r, g, s) {
		return
	}
	id, e := app.readNamedIDParam(r, "instructionID")
	if e != nil {
		app.notFoundResponse(w, r)
		return
	}
	item, e := app.models.CareInstructions.Get(g, s, id)
	if e != nil {
		app.respondToEntityModelError(w, r, e)
		return
	}
	var input careInstructionInput
	if e = app.readJSON(w, r, &input); e != nil {
		app.badRequestResponse(w, r, e)
		return
	}
	input.apply(&item)
	u, _ := app.contextGetAuthenticatedUser(r)
	item.UpdatedBy = u.ID
	if !app.validateCareInstruction(w, r, item) {
		return
	}
	item, e = app.models.CareInstructions.Update(g, item)
	if e != nil {
		app.respondToEntityModelError(w, r, e)
		return
	}
	_ = app.writeJSON(w, http.StatusOK, envelope{"care_instruction": item}, nil)
}
func (app *application) deleteCareInstructionHandler(w http.ResponseWriter, r *http.Request) {
	g, _ := app.readGardenIDParam(r)
	s, e := app.readIDParam(r)
	if e != nil {
		app.notFoundResponse(w, r)
		return
	}
	if !app.canWriteCareInstructions(w, r, g, s) {
		return
	}
	id, e := app.readNamedIDParam(r, "instructionID")
	if e != nil {
		app.notFoundResponse(w, r)
		return
	}
	if e = app.models.CareInstructions.Delete(g, s, id); e != nil {
		app.respondToEntityModelError(w, r, e)
		return
	}
	w.WriteHeader(http.StatusNoContent)
}

func (app *application) canWriteCareInstructions(w http.ResponseWriter, r *http.Request, gardenID, speciesID int) bool {
	species, err := app.models.Species.Get(gardenID, speciesID)
	if err != nil {
		app.respondToEntityModelError(w, r, err)
		return false
	}
	member, _ := app.contextGetGardenMember(r)
	user, _ := app.contextGetAuthenticatedUser(r)
	if species.GardenID == nil {
		if !user.Can(storage.ApplicationPermissionGlobalSpeciesWrite) {
			app.permissionDeniedResponse(w, r)
			return false
		}
	} else if !member.Can(storage.GardenPermissionSpeciesWrite) {
		app.permissionDeniedResponse(w, r)
		return false
	}
	return true
}