package api

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

	"gardomatic.kleiax.de/internal/platform/validate"
	"gardomatic.kleiax.de/internal/storage"
)

type environmentVariable struct {
	Component string `json:"component"`
	Name      string `json:"name"`
	Value     string `json:"value"`
}

func (app *application) showAdminEnvironmentHandler(w http.ResponseWriter, r *http.Request) {
	variables := []environmentVariable{
		{Component: "API", Name: "GARDOMATIC_ENV", Value: app.config.Env},
		{Component: "API", Name: "GARDOMATIC_DB_DSN", Value: maskedValue(app.config.DB.Dsn)},
		{Component: "API", Name: "GARDOMATIC_DB_MAX_OPEN_CONNS", Value: fmt.Sprint(app.config.DB.MaxOpenConns)},
		{Component: "API", Name: "GARDOMATIC_DB_MAX_IDLE_CONNS", Value: fmt.Sprint(app.config.DB.MaxIdleConns)},
		{Component: "API", Name: "GARDOMATIC_DB_MAX_IDLE_TIME", Value: app.config.DB.MaxIdleTime.String()},
		{Component: "API", Name: "GARDOMATIC_API_HOST", Value: app.config.Host},
		{Component: "API", Name: "GARDOMATIC_API_PORT", Value: fmt.Sprint(app.config.Port)},
		{Component: "API", Name: "GARDOMATIC_WEB_BASE_URL", Value: app.config.WebBaseURL},
		{Component: "API", Name: "GARDOMATIC_SESSION_COOKIE_NAME", Value: app.config.Session.CookieName},
		{Component: "API", Name: "GARDOMATIC_SESSION_LIFETIME", Value: app.config.Session.Lifetime.String()},
		{Component: "API", Name: "GARDOMATIC_SESSION_IDLE_TIMEOUT", Value: app.config.Session.IdleTimeout.String()},
		{Component: "API", Name: "GARDOMATIC_COOKIE_SECURE", Value: fmt.Sprint(app.config.Session.CookieSecure)},
		{Component: "API", Name: "GARDOMATIC_RATE_LIMIT_ENABLED", Value: fmt.Sprint(app.config.Limiter.Enabled)},
		{Component: "API", Name: "GARDOMATIC_RATE_LIMIT_RPS", Value: fmt.Sprint(app.config.Limiter.Rps)},
		{Component: "API", Name: "GARDOMATIC_RATE_LIMIT_BURST", Value: fmt.Sprint(app.config.Limiter.Burst)},
		{Component: "API", Name: "GARDOMATIC_CORS_TRUSTED_ORIGINS", Value: strings.Join(app.config.Cors.TrustedOrigins, ",")},
		{Component: "API", Name: "GARDOMATIC_SMTP_MODE", Value: string(app.config.Mail.Mode)},
		{Component: "API", Name: "GARDOMATIC_SMTP_HOST", Value: app.config.Mail.Host},
		{Component: "API", Name: "GARDOMATIC_SMTP_PORT", Value: fmt.Sprint(app.config.Mail.Port)},
		{Component: "API", Name: "GARDOMATIC_SMTP_USERNAME", Value: app.config.Mail.Username},
		{Component: "API", Name: "GARDOMATIC_SMTP_PASSWORD", Value: maskedValue(app.config.Mail.Password)},
		{Component: "API", Name: "GARDOMATIC_SMTP_SENDER", Value: app.config.Mail.Sender},
		{Component: "API", Name: "GARDOMATIC_SMTP_FILE_PATH", Value: app.config.Mail.FilePath},
	}
	if err := app.writeJSON(w, http.StatusOK, envelope{"variables": variables}, nil); err != nil {
		app.serverErrorResponse(w, r, err)
	}
}

func maskedValue(value string) string {
	if value == "" {
		return "(nicht gesetzt)"
	}
	return "•••••••• (gesetzt)"
}

func (app *application) sendAdminTestMailHandler(w http.ResponseWriter, r *http.Request) {
	var input struct {
		Email string `json:"email"`
	}
	if err := app.readJSON(w, r, &input); err != nil {
		app.badRequestResponse(w, r, err)
		return
	}
	input.Email = strings.ToLower(strings.TrimSpace(input.Email))
	v := validate.New()
	storage.ValidateEmail(v, input.Email)
	if !v.Valid() {
		app.failedValidationResponse(w, r, v.Errors)
		return
	}
	if err := app.mailer.Send(input.Email, "test_mail.tmpl", nil); err != nil {
		app.serverErrorResponse(w, r, err)
		return
	}
	if err := app.writeJSON(w, http.StatusAccepted, envelope{"message": "test mail sent"}, nil); err != nil {
		app.serverErrorResponse(w, r, err)
	}
}