// Copyright 2013 gopm authors.
//
// Licensed under the Apache License, Version 2.0 (the "License"): you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations
// under the License.

package doc

import (
	"fmt"
	"go/token"
	"net/http"
	"os"
	"regexp"
	"time"
)

const (
	TRUNK   = "trunk"
	MASTER  = "master"
	DEFAULT = "default"
	TAG     = "tag"
	BRANCH  = "branch"
	COMMIT  = "commit"
)

type Node struct {
	ImportPath  string
	DownloadURL string
	Type        string
	Value       string // Branch, tag or commit.
	IsGetDeps   bool
}

func (nod *Node) VerString() string {
	if nod.Value == "" {
		return nod.Type
	}
	return fmt.Sprintf("%v:%v", nod.Type, nod.Value)
}

// source is source code file.
type source struct {
	rawURL string
	name   string
	data   []byte
}

func (s *source) Name() string       { return s.name }
func (s *source) Size() int64        { return int64(len(s.data)) }
func (s *source) Mode() os.FileMode  { return 0 }
func (s *source) ModTime() time.Time { return time.Time{} }
func (s *source) IsDir() bool        { return false }
func (s *source) Sys() interface{}   { return nil }

// walker holds the state used when building the documentation.
type walker struct {
	ImportPath string
	srcs       map[string]*source // Source files.
	fset       *token.FileSet
}

// service represents a source code control service.
type service struct {
	pattern *regexp.Regexp
	prefix  string
	get     func(*http.Client, map[string]string, string, *Node, map[string]bool) ([]string, error)
}

// services is the list of source code control services handled by gopkgdoc.
var services = []*service{
	{githubPattern, "github.com/", getGithubDoc},
	{googlePattern, "code.google.com/", getGoogleDoc},
	{bitbucketPattern, "bitbucket.org/", getBitbucketDoc},
	{launchpadPattern, "launchpad.net/", getLaunchpadDoc},
	{oscPattern, "git.oschina.net/", getOSCDoc},
}