package controller

import (
	"net/http"
	"os"
	"path/filepath"
	"strings"
	"time"

	"github.com/Caknoooo/go-gin-clean-starter/pkg/constants"
	"github.com/Caknoooo/go-gin-clean-starter/pkg/utils"
	"github.com/gin-gonic/gin"
	"github.com/samber/do"
	"gorm.io/gorm"
)

type (
	LogsController interface {
		GetLogs(ctx *gin.Context)
		GetLogsByMonth(ctx *gin.Context)
		ServeLogsPage(ctx *gin.Context)
	}

	logsController struct {
		db *gorm.DB
	}
)

func NewLogsController(injector *do.Injector) LogsController {
	db := do.MustInvokeNamed[*gorm.DB](injector, constants.DB)
	return &logsController{
		db: db,
	}
}

func (c *logsController) ServeLogsPage(ctx *gin.Context) {
	acceptHeader := ctx.GetHeader("Accept")
	if strings.Contains(acceptHeader, "text/html") {
		month := strings.ToLower(time.Now().Format("January"))
		ctx.HTML(http.StatusOK, "logs.html", gin.H{
			"Month": month,
			"Logs":  []string{},
		})
		return
	}
	ctx.Next()
}

func (c *logsController) GetLogs(ctx *gin.Context) {
	month := strings.ToLower(time.Now().Format("January"))
	c.getLogsForMonth(ctx, month)
}

func (c *logsController) GetLogsByMonth(ctx *gin.Context) {
	month := ctx.Param("month")
	c.getLogsForMonth(ctx, month)
}

func (c *logsController) getLogsForMonth(ctx *gin.Context, month string) {
	// Multiple possible log locations
	logLocations := []string{
		"/app/config/logs/query_log",
		"./config/logs/query_log",
		"/tmp/logs",
	}

	var logs []string
	var found bool

	for _, logDir := range logLocations {
		logFile := filepath.Join(logDir, month+"_query.log")

		content, err := os.ReadFile(logFile)
		if err == nil {
			// File found, parse content
			logEntries := strings.Split(string(content), "\r\n")
			for _, entry := range logEntries {
				if strings.TrimSpace(entry) != "" {
					logs = append(logs, entry)
				}
			}
			found = true
			break
		}
	}

	if !found {
		logs = []string{}
	}

	// buat logs terbaru muncul paling atas (reverse slice)
	for i, j := 0, len(logs)-1; i < j; i, j = i+1, j-1 {
		logs[i], logs[j] = logs[j], logs[i]
	}

	// Jika request Accept header adalah application/json, kembalikan JSON
	if ctx.GetHeader("Accept") == "application/json" {
		res := utils.BuildResponseSuccess("Success get logs", gin.H{
			"month": month,
			"logs":  logs,
			"total": len(logs),
		})
		ctx.JSON(http.StatusOK, res)
		return
	}

	// Default kembalikan HTML page
	ctx.HTML(http.StatusOK, "logs.html", gin.H{
		"Month": month,
		"Logs":  logs,
	})
}