package api

import (
	"net/http"

	"github.com/google/uuid"

	"markdownhub/internal/crypto"
	"markdownhub/internal/files"
)

// ─── Build Jobs ──────────────────────────────────────────────────────────────

func (s *Server) handleBuildSubmit(w http.ResponseWriter, r *http.Request) {
	var req struct {
		FileID   string `json:"file_id"`
		Path     string `json:"path"`
		GiteaURL string `json:"gitea_url"`
		GiteaToken string `json:"gitea_token"`
		GiteaOrg string `json:"gitea_org"`
		RepoName string `json:"repo_name"`
		Model    string `json:"model"`
	}
	if err := decodeBody(r, &req); err != nil || req.RepoName == "" {
		writeJSON(w, 400, map[string]string{"error": "repo_name required"})
		return
	}

	userID := getUserID(r)

	// Read spec content from file
	var specContent string
	if req.Path != "" {
		content, err := files.ReadFile(s.dataDir, userID, req.Path)
		if err != nil {
			writeJSON(w, 404, map[string]string{"error": "spec file not found"})
			return
		}
		specContent = content
	}

	jobID := uuid.New().String()
	// Encrypt Gitea token at rest
	encToken := req.GiteaToken
	if encToken != "" {
		key := crypto.KeyFromSecret(s.secret)
		if enc, err := crypto.EncryptString(encToken, key); err == nil {
			encToken = enc
		}
	}
	_, err := s.db.Exec(
		`INSERT INTO build_jobs (id, user_id, status, spec_content, gitea_url, gitea_token, gitea_org, repo_name, model)
		 VALUES (?, ?, 'pending', ?, ?, ?, ?, ?, ?)`,
		jobID, userID, specContent, req.GiteaURL, encToken, req.GiteaOrg, req.RepoName, req.Model,
	)
	if err != nil {
		writeJSON(w, 500, map[string]string{"error": "failed to create job"})
		return
	}

	writeJSON(w, 201, map[string]string{"job_id": jobID, "status": "pending"})
}

func (s *Server) handleBuildJobs(w http.ResponseWriter, r *http.Request) {
	userID := getUserID(r)
	rows, err := s.db.Query(
		"SELECT id, status, repo_name, model, created_at, updated_at FROM build_jobs WHERE user_id = ? ORDER BY created_at DESC LIMIT 50",
		userID,
	)
	if err != nil {
		writeJSON(w, 500, map[string]string{"error": "query failed"})
		return
	}
	defer rows.Close()

	var jobs []map[string]interface{}
	for rows.Next() {
		var id, status, repoName, model, createdAt, updatedAt string
		rows.Scan(&id, &status, &repoName, &model, &createdAt, &updatedAt)
		jobs = append(jobs, map[string]interface{}{
			"job_id": id, "status": status, "repo_name": repoName,
			"model": model, "created_at": createdAt, "updated_at": updatedAt,
		})
	}
	if jobs == nil {
		jobs = []map[string]interface{}{}
	}
	writeJSON(w, 200, jobs)
}

func (s *Server) handleBuildStatus(w http.ResponseWriter, r *http.Request) {
	var req struct {
		JobID string `json:"job_id"`
	}
	if err := decodeBody(r, &req); err != nil || req.JobID == "" {
		writeJSON(w, 400, map[string]string{"error": "job_id required"})
		return
	}

	var status, repoName, log, updatedAt string
	err := s.db.QueryRow(
		"SELECT status, repo_name, log, updated_at FROM build_jobs WHERE id = ?", req.JobID,
	).Scan(&status, &repoName, &log, &updatedAt)
	if err != nil {
		writeJSON(w, 404, map[string]string{"error": "job not found"})
		return
	}

	writeJSON(w, 200, map[string]interface{}{
		"job_id": req.JobID, "status": status, "repo_name": repoName,
		"log": log, "updated_at": updatedAt,
	})
}

func (s *Server) handleBuildCancel(w http.ResponseWriter, r *http.Request) {
	var req struct {
		JobID string `json:"job_id"`
	}
	if err := decodeBody(r, &req); err != nil || req.JobID == "" {
		writeJSON(w, 400, map[string]string{"error": "job_id required"})
		return
	}

	s.db.Exec("UPDATE build_jobs SET status = 'cancelled', updated_at = datetime('now') WHERE id = ? AND status = 'pending'", req.JobID)
	writeJSON(w, 200, map[string]string{"status": "cancelled"})
}

// ─── Daemon Endpoints ────────────────────────────────────────────────────────

func (s *Server) handleDaemonPoll(w http.ResponseWriter, r *http.Request) {
	var id, specContent, giteaURL, giteaToken, giteaOrg, repoName, model string
	err := s.db.QueryRow(
		`SELECT id, spec_content, gitea_url, gitea_token, gitea_org, repo_name, model
		 FROM build_jobs WHERE status = 'pending' ORDER BY created_at ASC LIMIT 1`,
	).Scan(&id, &specContent, &giteaURL, &giteaToken, &giteaOrg, &repoName, &model)
	if err != nil {
		// No pending jobs
		writeJSON(w, 200, map[string]interface{}{})
		return
	}

	// Mark as picked up
	s.db.Exec("UPDATE build_jobs SET status = 'running', updated_at = datetime('now') WHERE id = ?", id)

	// Decrypt token
	if giteaToken != "" {
		key := crypto.KeyFromSecret(s.secret)
		if dec, err := crypto.DecryptString(giteaToken, key); err == nil {
			giteaToken = dec
		}
	}

	writeJSON(w, 200, map[string]interface{}{
		"job_id":       id,
		"spec_content": specContent,
		"gitea_url":    giteaURL,
		"gitea_token":  giteaToken,
		"gitea_org":    giteaOrg,
		"repo_name":    repoName,
		"model":        model,
	})
}

func (s *Server) handleDaemonHeartbeat(w http.ResponseWriter, r *http.Request) {
	s.db.Exec(
		`INSERT INTO daemon_state (id, last_heartbeat, status) VALUES ('singleton', datetime('now'), 'online')
		 ON CONFLICT(id) DO UPDATE SET last_heartbeat = datetime('now'), status = 'online'`,
	)
	writeJSON(w, 200, map[string]string{"status": "ok"})
}

func (s *Server) handleDaemonReport(w http.ResponseWriter, r *http.Request) {
	var req struct {
		JobID  string `json:"job_id"`
		Status string `json:"status"`
		Log    string `json:"log"`
	}
	if err := decodeBody(r, &req); err != nil || req.JobID == "" {
		writeJSON(w, 400, map[string]string{"error": "job_id required"})
		return
	}

	s.db.Exec(
		"UPDATE build_jobs SET status = ?, log = ?, updated_at = datetime('now') WHERE id = ?",
		req.Status, req.Log, req.JobID,
	)
	writeJSON(w, 200, map[string]string{"status": "ok"})
}

// ─── File Search ─────────────────────────────────────────────────────────────

func (s *Server) handleSearchFiles(w http.ResponseWriter, r *http.Request) {
	var req struct {
		Query string `json:"query"`
	}
	if err := decodeBody(r, &req); err != nil || req.Query == "" {
		writeJSON(w, 400, map[string]string{"error": "query required"})
		return
	}

	userID := getUserID(r)
	results, err := files.Search(s.dataDir, userID, req.Query)
	if err != nil {
		writeJSON(w, 500, map[string]string{"error": "search failed"})
		return
	}
	writeJSON(w, 200, results)
}