package output

import (
	"fmt"
	"strings"
	"time"

	"git.leaktechnologies.dev/Leak_Technologies/Skyfeed/internal/weather"
)

// Theme defines simple ANSI colour codes for terminal output.
var Theme = struct {
	Reset   string
	White   string
	Cyan    string
	Yellow  string
	Blue    string
	Green   string
	Red     string
	Magenta string
}{
	Reset:   "\033[0m",
	White:   "\033[97m",
	Cyan:    "\033[96m",
	Yellow:  "\033[93m",
	Blue:    "\033[94m",
	Green:   "\033[92m",
	Red:     "\033[91m",
	Magenta: "\033[95m",
}

// WeatherIcon maps normalized condition keywords to simple glyphs.
func WeatherIcon(condition string) string {
	condition = strings.ToLower(condition)
	switch {
	case strings.Contains(condition, "sunny"):
		return "☀"
	case strings.Contains(condition, "clear"):
		return "🌙"
	case strings.Contains(condition, "partly"):
		return "⛅"
	case strings.Contains(condition, "cloud"):
		return "☁"
	case strings.Contains(condition, "rain"):
		return "🌧"
	case strings.Contains(condition, "snow"):
		return "❄"
	case strings.Contains(condition, "mixed"):
		return "🌨"
	case strings.Contains(condition, "fog"):
		return "🌫"
	case strings.Contains(condition, "thunder"):
		return "⛈"
	default:
		return "❔"
	}
}

// FormatWeatherCLI returns a full formatted string for terminal output.
func FormatWeatherCLI(data weather.WeatherData, colored bool) string {
	icon := WeatherIcon(data.Condition)
	temp := fmt.Sprintf("%.1f°C", data.Temperature)
	ts := parseTimestamp(data.Timestamp)

	if colored {
		return fmt.Sprintf("%s%s  %s%s  %s%s%s\n%sCondition:%s %s\n%sHumidity:%s %s%%  %sWind:%s %s %s\n%sPressure:%s %s kPa  %sUpdated:%s %s%s",
			Theme.Cyan, icon, Theme.White, data.Station,
			Theme.Yellow, temp, Theme.Reset,
			Theme.Blue, Theme.Reset, data.Condition,
			Theme.Blue, Theme.Reset, data.Humidity,
			Theme.Blue, Theme.Reset, data.WindDir, data.WindSpeed,
			Theme.Blue, Theme.Reset, data.Pressure,
			Theme.Blue, Theme.Reset, ts.Format("15:04 MST"), Theme.Reset,
		)
	}

	return fmt.Sprintf("%s  %s  %s\nCondition: %s\nHumidity: %s%%  Wind: %s %s\nPressure: %s kPa  Updated: %s",
		icon, data.Station, temp,
		data.Condition,
		data.Humidity, data.WindDir, data.WindSpeed,
		data.Pressure, ts.Format("15:04 MST"),
	)
}

// parseTimestamp safely parses an RFC3339 or other timestamp format.
func parseTimestamp(ts string) time.Time {
	if ts == "" {
		return time.Now()
	}
	t, err := time.Parse(time.RFC3339, ts)
	if err != nil {
		return time.Now()
	}
	return t
}

// FormatForUI produces a compact version for GUI or embedded display.
func FormatForUI(data weather.WeatherData) string {
	icon := WeatherIcon(data.Condition)
	return fmt.Sprintf("%s %s %.1f°C — %s", icon, data.Station, data.Temperature, data.Condition)
}