package tui

import (
	"fmt"
	"strings"

	tea "github.com/charmbracelet/bubbletea"
)

const (
	burnCurGPUStress = 0
	burnCurModeQuick = 1
	burnCurModeStd   = 2
	burnCurModeExpr  = 3
	burnCurRun       = 4
	burnCurTotal     = 5
)

func (m model) enterBurnInTests() (tea.Model, tea.Cmd) {
	m.screen = screenBurnInTests
	m.cursor = 0
	if !m.burnInitialized {
		m.burnMode = 0
		m.burnCursor = 0
		m.burnInitialized = true
	}
	return m, nil
}

func (m model) updateBurnInTests(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch msg.String() {
	case "up", "k":
		if m.burnCursor > 0 {
			m.burnCursor--
		}
	case "down", "j":
		if m.burnCursor < burnCurTotal-1 {
			m.burnCursor++
		}
	case " ":
		switch m.burnCursor {
		case burnCurModeQuick, burnCurModeStd, burnCurModeExpr:
			m.burnMode = m.burnCursor - burnCurModeQuick
		}
	case "enter":
		switch m.burnCursor {
		case burnCurGPUStress, burnCurRun:
			return m.burnRunSelected()
		case burnCurModeQuick, burnCurModeStd, burnCurModeExpr:
			m.burnMode = m.burnCursor - burnCurModeQuick
		}
	case "f", "F", "r", "R":
		return m.burnRunSelected()
	case "1":
		m.burnMode = 0
	case "2":
		m.burnMode = 1
	case "3":
		m.burnMode = 2
	case "esc":
		m.screen = screenMain
		m.cursor = 1
	case "q", "ctrl+c":
		return m, tea.Quit
	}
	return m, nil
}

func (m model) burnRunSelected() (tea.Model, tea.Cmd) {
	return m.hcRunFanStress()
}

func renderBurnInTests(m model) string {
	var b strings.Builder

	fmt.Fprintln(&b, "BURN-IN TESTS")
	fmt.Fprintln(&b)
	fmt.Fprintln(&b, "  Stress tests:")
	fmt.Fprintln(&b)

	pfx := "  "
	if m.burnCursor == burnCurGPUStress {
		pfx = "> "
	}
	fmt.Fprintf(&b, "%s[ GPU PLATFORM STRESS TEST [F] ]   (thermal cycling, fan lag, throttle check)\n", pfx)

	fmt.Fprintln(&b)
	fmt.Fprintln(&b, "  Mode:")
	modes := []struct{ label, key string }{
		{"Quick", "1"},
		{"Standard", "2"},
		{"Express", "3"},
	}
	for i, mode := range modes {
		pfx := "  "
		if m.burnCursor == burnCurModeQuick+i {
			pfx = "> "
		}
		radio := "( )"
		if m.burnMode == i {
			radio = "(*)"
		}
		fmt.Fprintf(&b, "%s%s  %-10s  [%s]\n", pfx, radio, mode.label, mode.key)
	}

	fmt.Fprintln(&b)
	pfx = "  "
	if m.burnCursor == burnCurRun {
		pfx = "> "
	}
	fmt.Fprintf(&b, "%s[ RUN SELECTED [R] ]\n", pfx)

	fmt.Fprintln(&b)
	fmt.Fprintln(&b, "─────────────────────────────────────────────────────────────────")
	fmt.Fprint(&b, "[↑↓] move  [space/enter] select  [1/2/3] mode  [R/F] run  [Esc] back")
	return b.String()
}