package config

import (
	"os"

	"gopkg.in/yaml.v3"
)

type Config struct {
	TickLength        int              `yaml:"tick_length"`
	StartingRoom      int              `yaml:"starting_room"`
	StartupValidation ValidationConfig `yaml:"startup_validation"`
	GameConstants     GameConstants    `yaml:"game_constants"`
	DefaultColors     ColorsConfig     `yaml:"default_colors"`
	ConstantColors    ColorsConfig     `yaml:"constant_colors"`
	TLS               TLSConfig        `yaml:"tls"`
	Telnet            TelnetConfig     `yaml:"telnet"`
	TelnetTLS         TelnetTLSConfig  `yaml:"telnet_tls"`
	HTTP              HTTPConfig       `yaml:"http"`
	HTTPS             HTTPSConfig      `yaml:"https"`
	AdminHTTP         AdminHTTPConfig  `yaml:"admin_http"`
	AdminHTTPS        AdminHTTPSConfig `yaml:"admin_https"`
}

// GameConstants holds tunable game-wide numbers that would otherwise be
// hardcoded in the engine.
type GameConstants struct {
	// ShopDefaultRestock is the fallback restock interval (in ticks) for a shop
	// item that does not set its own restock_ticks.
	ShopDefaultRestock float64 `yaml:"shop_default_restock"`
}

type ColorsConfig map[string]string

func DefaultColors() ColorsConfig {
	return ColorsConfig{
		"room_name":      "74 bold",
		"room_number":    "F0",
		"room_desc":      "FF",
		"direction":      "49",
		"exit_direction": "49",
		"exit_name":      "74",
		"protected_mob":  "off",
		"mob":            "off",
		"damage_dealt":   "B4",
		"damage_taken":   "A7",

		"xp":                "B3",
		"level_up":          "B4 bold",
		"item":              "6E",
		"player_name":       "74",
		"death":             "A7 bold",
		"victory":           "6C",
		"miss":              "F5",
		"error":             "A7",
		"say":               "FF",
		"global":            "49",
		"dialog":            "6E",
		"dialog_options":    "bold",
		"command":           "0A bold",
		"broadcast":         "89",
		"sequence":          "off",
		"fire":              "B4",
		"eat_food":          "6C",
		"drop_message":      "89",
		"currency_pickup":   "B3",
		"visual_tick":       "49 dim",
		"visual_first_tick": "B4 bold",
		"battery":           "6C",
		"tech_depleted":     "A7",
		"science_mod":       "8B",
		"assassin_task":     "8B",
		"dim":               "F5 dim",
		"warning":           "B3",
		"farm_grow":         "6C",
		"farm_disease":      "A7",
		"map_at":            "B4 bold",
		"map_blocked":       "A7",
		"map_agility":       "43",
		"safespot_alert":    "A7 bold",
	}
}

// DefaultConstantColors returns the built-in specs for the colors that the
// engine renders conditionally and that players can never override (HP-bar
// tiers, level-difference bands, table-header chrome, status indicators, etc).
// Admins may override any of these via the constant_colors section of
// config.yaml; players have no access to them.
func DefaultConstantColors() ColorsConfig {
	return ColorsConfig{
		// HP / status bars (cmd_score.go, render_combat.go).
		"hp_bar_high":  "6C",
		"hp_bar_med":   "B3",
		"hp_bar_low":   "A7",
		"hp_bar_empty": "ED dim",

		// Task worksite progress bar (sys_labor.go) — same tiering rules
		// as the HP bar but a different low-color so labor tasks read
		// green/yellow/orange rather than green/yellow/red. It reuses
		// hp_bar_empty for the empty/unfilled cells.
		"task_bar_high": "6C",
		"task_bar_med":  "B3",
		"task_bar_low":  "43",

		// Score-panel other bars and tech/buff indicators (cmd_score.go).
		"battery_bar":         "6E",
		"run_energy_bar":      "6C",
		"active_tech_on":      "6C",
		"active_tech_status":  "6C",
		"active_tech_stat":    "6E",
		"score_max_value":     "FA",

		// Skill-level tier color on the score panel (cmd_score.go).
		"skill_lvl_max":  "B4",
		"skill_lvl_high": "B3",
		"skill_lvl_mid":  "74",
		"skill_lvl_low":  "49",
		"skill_lvl_base": "42",

		// Level-difference band on mobs/players (render_color.go).
		"level_diff_equal":      "FA",
		"level_diff_up_small":   "B3",
		"level_diff_up_big":      "A7",
		"level_diff_down_small": "6E",
		"level_diff_down_big":   "41",

		// Tech list status / name styling (cmd_tech.go).
		"tech_status_on":     "6C",
		"tech_status_off":    "F0",
		"tech_status_locked": "A7",
		"tech_name_unlocked": "49",
		"tech_name_locked":   "F0",

		// Shared table-heading chrome (cmd_skills.go, cmd_mods.go,
		// cmd_option.go, cmd_aps.go).
		"table_header_label": "49",
		"table_header_value": "FA",
		"table_header_detail": "F5",
		"table_header_xp":    "B3",
		"table_header_desc":  "FF",

		// APS / look inline accents.
		"aps_here":        "6C",
		"mob_hp_inline":   "A7",
		"protected_label": "FA",
		"god_tag_label":   "bold",

		// Production menu degraded/locked rows (production_menu.go).
		"production_locked": "F0",
	}
}

type ValidationConfig struct {
	RootRooms         []int `yaml:"root_rooms"`
	IgnoreUnreachable []int `yaml:"ignore_unreachable"`
}

type TelnetConfig struct {
	Enabled bool `yaml:"enabled"`
	Port    int  `yaml:"port"`
}

type TLSConfig struct {
	CertFile string `yaml:"cert_file"`
	KeyFile  string `yaml:"key_file"`
}

type TelnetTLSConfig struct {
	Enabled bool `yaml:"enabled"`
	Port    int  `yaml:"port"`
}

type HTTPConfig struct {
	Enabled bool `yaml:"enabled"`
	Port    int  `yaml:"port"`
}

type HTTPSConfig struct {
	Enabled bool `yaml:"enabled"`
	Port    int  `yaml:"port"`
}

type AdminHTTPConfig struct {
	Enabled bool `yaml:"enabled"`
	Port    int  `yaml:"port"`
}

type AdminHTTPSConfig struct {
	Enabled bool `yaml:"enabled"`
	Port    int  `yaml:"port"`
}

func Default() *Config {
	return &Config{
		TickLength:   600,
		StartingRoom: 1001,
		StartupValidation: ValidationConfig{
			RootRooms:         []int{1},
			IgnoreUnreachable: []int{},
		},
		GameConstants: GameConstants{
			ShopDefaultRestock: 1000,
		},
		DefaultColors:  DefaultColors(),
		ConstantColors: DefaultConstantColors(),
		TLS: TLSConfig{
			CertFile: "",
			KeyFile:  "",
		},
		Telnet: TelnetConfig{
			Enabled: true,
			Port:    4000,
		},
		TelnetTLS: TelnetTLSConfig{
			Enabled: false,
			Port:    4001,
		},
		HTTP: HTTPConfig{
			Enabled: false,
			Port:    8080,
		},
		HTTPS: HTTPSConfig{
			Enabled: false,
			Port:    8443,
		},
		AdminHTTP: AdminHTTPConfig{
			Enabled: false,
			Port:    9091,
		},
		AdminHTTPS: AdminHTTPSConfig{
			Enabled: false,
			Port:    9090,
		},
	}
}

func Load(path string) (*Config, error) {
	data, err := os.ReadFile(path)
	if err != nil {
		return nil, err
	}
	cfg := Default()
	if err := yaml.Unmarshal(data, cfg); err != nil {
		return nil, err
	}
	return cfg, nil
}

func SaveDefault(path string) error {
	cfg := Default()
	data, err := yaml.Marshal(cfg)
	if err != nil {
		return err
	}
	return os.WriteFile(path, data, 0644)
}