package code

import (
	"bufio"
	"os"
	"path"
	"strings"
	"time"

	ice "shylinux.com/x/icebergs"
	"shylinux.com/x/icebergs/base/cli"
	"shylinux.com/x/icebergs/base/mdb"
	kit "shylinux.com/x/toolkits"
)

func _go_tags(m *ice.Message, key string) {
	if s, e := os.Stat(path.Join(m.Option(cli.CMD_DIR), _TAGS)); os.IsNotExist(e) || s.ModTime().Before(time.Now().Add(kit.Duration("-72h"))) {
		m.Cmd(cli.SYSTEM, "gotags", "-R", "-f", _TAGS, ice.PWD)
	}

	ls := strings.Split(key, ice.PT)
	key = ls[len(ls)-1]

	for _, l := range strings.Split(m.Cmdx(cli.SYSTEM, GREP, "^"+key+"\\>", _TAGS), ice.NL) {
		ls := strings.SplitN(l, ice.TB, 2)
		if len(ls) < 2 {
			continue
		}

		ls = strings.SplitN(ls[1], ice.TB, 2)
		file := ls[0]
		ls = strings.SplitN(ls[1], ";\"", 2)
		text := strings.TrimSuffix(strings.TrimPrefix(ls[0], "/^"), "$/")
		line := kit.Int(text)

		f, e := os.Open(path.Join(m.Option(cli.CMD_DIR), file))
		m.Assert(e)
		defer f.Close()

		bio := bufio.NewScanner(f)
		for i := 1; bio.Scan(); i++ {
			if i == line || bio.Text() == text {
				m.PushSearch(ice.CMD, "tags", kit.MDB_FILE, strings.TrimPrefix(file, ice.PWD), kit.MDB_LINE, kit.Format(i), kit.MDB_TEXT, bio.Text())
			}
		}
	}
}
func _go_help(m *ice.Message, key string) {
	p := m.Cmd(cli.SYSTEM, GO, "doc", key).Append(cli.CMD_OUT)
	if p == "" {
		return
	}
	m.PushSearch(ice.CMD, "help", kit.MDB_FILE, key+".godoc", kit.MDB_LINE, 1, kit.MDB_TEXT, p)
}
func _go_find(m *ice.Message, key string) {
	for _, p := range strings.Split(m.Cmdx(cli.SYSTEM, FIND, ".", "-name", key), ice.NL) {
		if p == "" {
			continue
		}
		m.PushSearch(ice.CMD, FIND, kit.MDB_FILE, strings.TrimPrefix(p, ice.PWD), kit.MDB_LINE, 1, kit.MDB_TEXT, "")
	}
}
func _go_grep(m *ice.Message, key string) {
	msg := m.Spawn()
	msg.Split(m.Cmd(cli.SYSTEM, GREP, "--exclude-dir=.git", "--exclude=.[a-z]*", "-rn", key, ice.PT).Append(cli.CMD_OUT), "file:line:text", ":", ice.NL)
	msg.Table(func(index int, value map[string]string, head []string) { m.PushSearch(ice.CMD, GREP, value) })
}

const (
	_TAGS = ".tags"
	FIND  = "find"
	GREP  = "grep"
)
const GO = "go"
const MOD = "mod"
const SUM = "sum"
const PROTO = "proto"
const GODOC = "godoc"

func init() {
	Index.Register(&ice.Context{Name: GO, Help: "后端", Commands: map[string]*ice.Command{
		ice.CTX_INIT: {Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
			m.Cmd(mdb.SEARCH, mdb.CREATE, GODOC, m.Prefix(GO))
			m.Cmd(mdb.SEARCH, mdb.CREATE, GO, m.Prefix(GO))
			m.Cmd(mdb.ENGINE, mdb.CREATE, GO, m.Prefix(GO))

			for _, k := range []string{GODOC, PROTO, SUM, MOD, GO} {
				m.Cmd(mdb.PLUGIN, mdb.CREATE, k, m.Prefix(k))
				m.Cmd(mdb.RENDER, mdb.CREATE, k, m.Prefix(k))
			}
			LoadPlug(m, GO)
		}},
		GODOC: {Name: GODOC, Help: "文档", Action: ice.MergeAction(map[string]*ice.Action{
			mdb.RENDER: {Hand: func(m *ice.Message, arg ...string) {
				m.Option(cli.CMD_DIR, arg[2])
				m.Echo(m.Cmdx(cli.SYSTEM, GO, "doc", strings.TrimSuffix(arg[1], ice.PT+arg[0])))
			}},
		}, PlugAction())},
		PROTO: {Name: PROTO, Help: "协议", Action: ice.MergeAction(map[string]*ice.Action{}, PlugAction())},
		SUM:   {Name: SUM, Help: "版本", Action: ice.MergeAction(map[string]*ice.Action{}, PlugAction())},
		MOD:   {Name: MOD, Help: "模块", Action: ice.MergeAction(map[string]*ice.Action{}, PlugAction())},
		GO: {Name: GO, Help: "后端", Action: ice.MergeAction(map[string]*ice.Action{
			mdb.ENGINE: {Hand: func(m *ice.Message, arg ...string) {
				m.Option(cli.CMD_DIR, arg[2])
				if strings.HasSuffix(arg[1], "test.go") {
					m.Cmdy(cli.SYSTEM, GO, "test", "-v", ice.PWD+arg[1])
				} else {
					m.Cmdy(cli.SYSTEM, GO, "run", ice.PWD+arg[1])
				}
				m.Set(ice.MSG_APPEND)
			}},
			mdb.SEARCH: {Hand: func(m *ice.Message, arg ...string) {
				if arg[0] == kit.MDB_FOREACH {
					return
				}
				_go_tags(m, kit.Select(kit.MDB_MAIN, arg, 1))
				_go_help(m, kit.Select(kit.MDB_MAIN, arg, 1))
				_go_find(m, kit.Select(kit.MDB_MAIN, arg, 1))
				_go_grep(m, kit.Select(kit.MDB_MAIN, arg, 1))
			}},
		}, PlugAction())},
	}, Configs: map[string]*ice.Config{
		PROTO: {Name: PROTO, Help: "协议", Value: kit.Data(PLUG, kit.Dict(
			PREFIX, kit.Dict("//", COMMENT),
			PREPARE, kit.Dict(
				KEYWORD, kit.Simple(
					"syntax", "option", "package", "import", "service", "message",
				),
				DATATYPE, kit.Simple(
					"string", "int64", "int32",
				),
			), KEYWORD, kit.Dict(),
		))},
		MOD: {Name: MOD, Help: "模块", Value: kit.Data(PLUG, kit.Dict(
			PREFIX, kit.Dict("//", COMMENT),
			PREPARE, kit.Dict(
				KEYWORD, kit.Simple(
					"module", "require", "replace", "=>",
				),
			), KEYWORD, kit.Dict(),
		))},
		GO: {Name: GO, Help: "后端", Value: kit.Data(PLUG, kit.Dict(
			SPLIT, kit.Dict("space", "\t ", "operator", "{[(&.,:;!|<>)]}"),
			PREFIX, kit.Dict("//", COMMENT, "/*", COMMENT, "* ", COMMENT),
			PREPARE, kit.Dict(
				KEYWORD, kit.Simple(
					"package", "import", "type", "struct", "interface", "const", "var", "func",
					"if", "else", "for", "range", "break", "continue",
					"switch", "case", "default", "fallthrough",
					"go", "select", "defer", "return",
				),
				DATATYPE, kit.Simple(
					"int", "int32", "int64", "float64",
					"string", "byte", "bool", "error", "chan", "map",
				),
				FUNCTION, kit.Simple(
					"new", "make", "len", "cap", "copy", "append", "delete", "msg", "m",
				),
				CONSTANT, kit.Simple(
					"false", "true", "nil", "-1", "0", "1", "2",
				),
			), KEYWORD, kit.Dict(),
		))},
	}}, nil)
}