package handlers

import (
	"net/http"

	"xorm.io/xorm"

	gitdomain "github.com/forgeo/forgebucket/internal/domain/git"
)

type InsightsHandler struct {
	db *xorm.Engine
}

func NewInsightsHandler(db *xorm.Engine) *InsightsHandler {
	return &InsightsHandler{db: db}
}

type insightsResponse struct {
	Languages    []gitdomain.LangStat    `json:"languages"`
	Contributors []gitdomain.Contributor `json:"contributors"`
	TotalCommits int                     `json:"totalCommits"`
}

// Get returns language breakdown, top contributors, and total commit count
// for a repository. All data is read directly from git — no DB writes.
func (h *InsightsHandler) Get(w http.ResponseWriter, r *http.Request) {
	repo, ok := resolveRepo(h.db, w, r)
	if !ok {
		return
	}

	langs, _ := gitdomain.LanguageStats(repo.DiskPath, repo.DefaultBranch)
	contribs, _ := gitdomain.Contributors(repo.DiskPath, 8)
	count, _ := gitdomain.CommitCount(repo.DiskPath)

	if langs == nil {
		langs = []gitdomain.LangStat{}
	}
	if contribs == nil {
		contribs = []gitdomain.Contributor{}
	}

	jsonOK(w, insightsResponse{
		Languages:    langs,
		Contributors: contribs,
		TotalCommits: count,
	})
}