package main

import (
	"errors"
	"fmt"
	"net/http"

	"github.com/lyx0/nourybot/internal/data"
)

func (app *application) showCommandHandler(w http.ResponseWriter, r *http.Request) {
	name, err := app.readCommandNameParam(r)
	if err != nil {
		app.logError(r, err)
		return
	}

	// Get the data for a specific movie from our helper method,
	// then check if an error was returned, and which.
	command, err := app.Models.Commands.Get(name)
	if err != nil {
		switch {
		case errors.Is(err, data.ErrRecordNotFound):
			app.logError(r, err)
			return
		default:
			app.serverErrorResponse(w, r, err)
		}
		return
	}

	app.Logger.Infow("GET Command",
		"Command", command,
	)

	w.Header().Set("Access-Control-Allow-Origin", "*")
	err = app.writeJSON(w, http.StatusOK, envelope{"command": command}, nil)
	if err != nil {
		app.serverErrorResponse(w, r, err)
	}
}

func (app *application) createCommandHandler(w http.ResponseWriter, r *http.Request) {
	var input struct {
		Name     string `json:"name"`
		Text     string `json:"text"`
		Category string `json:"category"`
		Level    int    `json:"level"`
	}

	err := app.readJSON(w, r, &input)
	if err != nil {
		app.badRequestResponse(w, r, err)
		return
	}

	command := &data.Command{
		Name:     input.Name,
		Text:     input.Text,
		Category: input.Category,
		Level:    input.Level,
	}

	err = app.Models.Commands.Insert(command)
	if err != nil {
		app.serverErrorResponse(w, r, err)
		return
	}

	headers := make(http.Header)
	headers.Set("Location", fmt.Sprintf("/v1/commands/%s", command.Name))

	app.Logger.Infow("PUT Command",
		"Command", command,
	)

	err = app.writeJSON(w, http.StatusCreated, envelope{"command": command}, headers)
	if err != nil {
		app.serverErrorResponse(w, r, err)
	}
}

func (app *application) updateCommandHandler(w http.ResponseWriter, r *http.Request) {
	name, err := app.readCommandNameParam(r)
	if err != nil {
		app.notFoundResponse(w, r)
		return
	}

	command, err := app.Models.Commands.Get(name)
	if err != nil {
		switch {
		case errors.Is(err, data.ErrRecordNotFound):
			app.notFoundResponse(w, r)
		default:
			app.serverErrorResponse(w, r, err)
		}
		return
	}

	var input struct {
		Name     *string `json:"name"`
		Text     *string `json:"text"`
		Category *string `json:"category"`
		Level    *int    `json:"level"`
	}

	err = app.readJSON(w, r, &input)
	if err != nil {
		app.badRequestResponse(w, r, err)
		return
	}

	// There is a name since we successfully queried the database for
	// a command, so no need to check != nil.
	command.Name = *input.Name

	if input.Text != nil {
		command.Text = *input.Text
	}

	if input.Category != nil {
		command.Category = *input.Category
	}

	if input.Level != nil {
		command.Level = *input.Level
	}

	err = app.Models.Commands.Update(command)
	if err != nil {
		switch {
		case errors.Is(err, data.ErrEditConflict):
			app.editConflictResponse(w, r)
		default:
			app.serverErrorResponse(w, r, err)
		}
		return
	}

	app.Logger.Infow("PATCH Command",
		"Command", command,
	)

	err = app.writeJSON(w, http.StatusOK, envelope{"command": command}, nil)
	if err != nil {
		app.serverErrorResponse(w, r, err)
	}

}

func (app *application) deleteCommandHandler(w http.ResponseWriter, r *http.Request) {
	name, err := app.readCommandNameParam(r)
	if err != nil {
		app.notFoundResponse(w, r)
		return
	}

	err = app.Models.Commands.Delete(name)
	if err != nil {
		switch {
		case errors.Is(err, data.ErrRecordNotFound):
			app.notFoundResponse(w, r)
		default:
			app.serverErrorResponse(w, r, err)
		}
		return
	}

	app.Logger.Infow("DELETE Command",
		"Name", name,
	)

	err = app.writeJSON(w, http.StatusOK, envelope{"message": fmt.Sprintf("command %s deleted", name)}, nil)
	if err != nil {
		app.serverErrorResponse(w, r, err)
	}
}

type envelope map[string]interface{}