package cfb

import (
    "encoding/json"
    "errors"
    "fmt"
    "io/ioutil"
    "net/http"
    "os"
    "time"
)

// Game represents the structure of a single game
type Game struct {
    AwayTeam        string `json:"away_team"`
    AwayScore       string `json:"away_score"`
    HomeTeam        string `json:"home_team"`
    HomeScore       string `json:"home_score"`
    GameState       string `json:"game_state"`
    CurrentPeriod   string `json:"current_period"`
    StartTime       string `json:"start_time"`
    ContestClock    string `json:"contest_clock"`
    StartTimeEpoch  int64  `json:"start_time_epoch"`
}

// FetchScoreboard retrieves and parses the scoreboard data from the specified API URL
func FetchScoreboard(weekNumber int) ([]Game, error) {
    apiKey := os.Getenv("CFBD_API_KEY")
    if apiKey == "" {
        return nil, errors.New("missing API key")
    }

    url := fmt.Sprintf("https://ncaa.ewnix.net/scoreboard/football/fbs/2024/%d/all-conf", weekNumber)
    req, _ := http.NewRequest("GET", url, nil)
    req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", apiKey))

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        return nil, err
    }
    defer resp.Body.Close()

    if resp.StatusCode != http.StatusOK {
        return nil, fmt.Errorf("failed to fetch scoreboard, status code: %d", resp.StatusCode)
    }

    body, _ := ioutil.ReadAll(resp.Body)
    var data struct {
        Games []struct {
            Game Game `json:"game"`
        } `json:"games"`
    }

    if err := json.Unmarshal(body, &data); err != nil {
        return nil, fmt.Errorf("error parsing scoreboard: %w", err)
    }

    games := make([]Game, len(data.Games))
    for i, g := range data.Games {
        // Adjust start time by subtracting 5 hours for upcoming games
        if g.Game.GameState == "upcoming" {
            epochTime := time.Unix(g.Game.StartTimeEpoch, 0).Add(-5 * time.Hour)
            g.Game.StartTime = epochTime.Format("03:04PM ET")
        }
        games[i] = g.Game
    }

    return games, nil
}

// FormatGameOutput formats the game data into a string
func FormatGameOutput(game Game) string {
    if game.GameState == "live" {
        return fmt.Sprintf("%s: *%s* %s: *%s* Quarter: %s Time Remaining: %s",
            game.AwayTeam, game.AwayScore, game.HomeTeam, game.HomeScore, game.CurrentPeriod, game.ContestClock)
    }
    return fmt.Sprintf("%s: %s %s: %s Final",
        game.AwayTeam, game.AwayScore, game.HomeTeam, game.HomeScore)
}