// Game state detection for D2R.
package d2r

import (
	"image"

	"git.cloonar.com/openclawd/iso-bot/pkg/plugin"
)

// Detector implements plugin.GameDetector for D2R.
type Detector struct {
	config Config
}

// NewDetector creates a D2R state detector.
func NewDetector(config Config) *Detector {
	return &Detector{config: config}
}

// DetectState analyzes a screenshot and returns the current game state.
func (d *Detector) DetectState(frame image.Image) plugin.GameState {
	// Priority-based detection:
	// 1. Check for loading screen
	// 2. Check for main menu
	// 3. Check for character select
	// 4. Check for in-game (health orb visible)
	// 5. Check for death screen

	if d.isLoading(frame) {
		return plugin.StateLoading
	}
	if d.isMainMenu(frame) {
		return plugin.StateMainMenu
	}
	if d.isCharacterSelect(frame) {
		return plugin.StateCharacterSelect
	}
	if d.isInGame(frame) {
		vitals := d.ReadVitals(frame)
		if vitals.HealthPct == 0 {
			return plugin.StateDead
		}
		return plugin.StateInGame
	}
	return plugin.StateUnknown
}

// ReadVitals reads health and mana from the orbs.
func (d *Detector) ReadVitals(frame image.Image) plugin.VitalStats {
	// TODO: Analyze health/mana orb regions using color detection
	return plugin.VitalStats{}
}

// IsInGame returns true if health orb is visible.
func (d *Detector) IsInGame(frame image.Image) bool {
	return d.isInGame(frame)
}

func (d *Detector) isLoading(frame image.Image) bool {
	// TODO: Check for loading screen (mostly black with loading bar)
	return false
}

func (d *Detector) isMainMenu(frame image.Image) bool {
	// TODO: Template match main menu elements
	return false
}

func (d *Detector) isCharacterSelect(frame image.Image) bool {
	// TODO: Template match character select screen
	return false
}

func (d *Detector) isInGame(frame image.Image) bool {
	// TODO: Check if health orb region contains red pixels
	return false
}