package main

import ( 
    "github.com/gin-gonic/gin"
    "net/http"
    "log/slog"
    "encoding/json"
    "fmt"
    "io"
)

type ArtistInfo struct {
	ID string
	Name string
	Popularity int
	Genres []string
}

// Define our route functions here
func ping(c *gin.Context) {
    c.String(http.StatusOK, "pong")
}

func getArtistByID(c *gin.Context) {
    artistID := c.Params.ByName("artistID")
    spotifyAuthToken := c.GetString("spotifyAuthToken")

    if artistID == "" || spotifyAuthToken == "Bearer " {
    	c.JSON(http.StatusBadRequest, gin.H{"Error": "Could not find required parameters and/or required authentication tokens"})
	return
    }

    // Make a request to spotify API to grab artist data
    artistEndpoint := fmt.Sprintf("https://api.spotify.com/v1/artists/%s", artistID)
    req, err := http.NewRequest("GET", artistEndpoint, nil)
    if err != nil {
    	slog.Error("[GOMUSIC] Failed to build HTTP request", "Error", err)
	c.JSON(http.StatusInternalServerError, gin.H{"Error": "Failed to request latest spotify data"})
	return
    }
    req.Header.Add("Authorization", spotifyAuthToken)

    // Send request and save the response into DB
    resp, err := http.DefaultClient.Do(req)
    if err != nil {
    	slog.Error("[GOMUSIC] Failed to get artist data from spotify API", "Error", err)
	c.JSON(http.StatusInternalServerError, gin.H{"Error": "Failed to request latest spotify data"})
	return
    } else if resp.StatusCode != 200 {
    	slog.Error("[GOMUSIC] Failed to get artist data from spotify API", "Error", resp.Status)
	c.JSON(http.StatusInternalServerError, gin.H{"Error": "Failed to request latest spotify data"})
	return

    }
    respData, err := io.ReadAll(resp.Body)
    if err != nil {
    	slog.Error("[GOMUSIC] Failed to read response data from spotify API", "Error", resp.Status)
	c.JSON(http.StatusInternalServerError, gin.H{"Error": "Failed to request latest spotify data"})
	return

    }
    
    // Close this immediately since it's unused now
    resp.Body.Close()

    var artistInfo ArtistInfo
    err = json.Unmarshal(respData, &artistInfo)
    if err != nil {
        slog.Error("[GOMUSIC] Failed to read response body data from spotify", "Error", err)
	c.JSON(http.StatusInternalServerError, gin.H{"Error": "Failed to request latest spotify data"})
	return
    }
    
    // Send back our response
    c.JSON(http.StatusOK, artistInfo)

    // Update DB here
    //value, ok := db[artistID]
    //if ok {
    //    c.JSON(http.StatusOK, gin.H{"artistID": artistID, "value": value})
    //} else {
    //    c.JSON(http.StatusOK, gin.H{"artistID": artistID, "status": "no value"})
    //}
}