import os
import subprocess
import unittest
from pathlib import Path

from test_cli import TOML, Cli
from test_claims import git
from test_merge import IDENT


class SplitCli(Cli):
    """Private project (self.root, git, workflow.toml with code_root) + sibling code repo (self.code)."""
    toml = TOML + 'code_root = "../code"\n'

    def setUp(self):
        super().setUp()
        git(self.root, "init", "-q", "-b", "master")
        (self.root / ".gitignore").write_text(".wf/\nout/\n")
        git(self.root, "add", "-A")
        git(self.root, "commit", "-qm", "init")
        self.code = self.root.parent / "code"
        self.code.mkdir()
        git(self.code, "init", "-q", "-b", "master")
        (self.code / ".gitignore").write_text(".worktrees/\n.wf-home\n")
        (self.code / "lib.txt").write_text("a\n")
        git(self.code, "add", "-A")
        git(self.code, "commit", "-qm", "init")

    def add_wt(self, lane="sonnet", id="t-three"):
        """Code worktree on branch <lane>/<id> with .wf-home (what wf start makes)."""
        wt = self.code / ".worktrees" / lane
        git(self.code, "worktree", "add", "-q", str(wt), "-b", f"{lane}/{id}")
        (wt / ".wf-home").write_text(f"{self.root}\n")
        return wt

    def log(self, repo, rev="master"):
        return subprocess.run(["git", "log", "--format=%s", rev], cwd=repo, capture_output=True, text=True).stdout

    def sha(self, repo, rev="master"):
        return subprocess.run(["git", "rev-parse", "--short", rev], cwd=repo, capture_output=True, text=True).stdout.strip()


class DiscoveryTest(SplitCli):
    def test_wf_in_code_worktree_finds_private_project(self):
        wt = self.add_wt()
        code, out, err = self.wf("show", "t-three", project=False, cwd=wt)
        self.assertEqual(code, 0, err)
        self.assertIn("**t-three**", out)

    def test_dangling_wf_home_is_config_error(self):
        wt = self.add_wt()
        (wt / ".wf-home").write_text(f"{self.root.parent / 'gone'}\n")
        code, out, err = self.wf("show", "t-three", project=False, cwd=wt)
        self.assertNotEqual(code, 0)
        self.assertIn(".wf-home points to", err)
        self.assertNotIn("Traceback", err)

    def test_split_and_code_main(self):
        import sys
        sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
        from wflib import config
        cfg = config.load(self.root)
        self.assertTrue(cfg.split)
        self.assertEqual(config.code_main(cfg), self.code)
        self.assertEqual(cfg.push, [])

    def test_code_root_inside_same_repo_not_split(self):
        import sys
        sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
        from wflib import config
        (self.root / "workflow.toml").write_text(TOML + 'code_root = "."\npush = ["true"]\n')
        cfg = config.load(self.root)
        self.assertFalse(cfg.split)
        self.assertIsNone(config.code_main(cfg))
        self.assertEqual(cfg.push, ["true"])


class StartSplitTest(SplitCli):
    toml = SplitCli.toml + 'worktree_setup = ["pwd > where.txt"]\n'

    def test_start_makes_code_worktree_with_wf_home(self):
        wt = self.code / ".worktrees" / "slow"
        code, out, err = self.wf("start", "t-three", "--worktree", str(wt), "--branch", "slow/t-three",
                                 project=False, env=IDENT)
        self.assertEqual(code, 0, out + err)
        self.assertEqual((wt / ".wf-home").read_text(), f"{self.root}\n")
        self.assertEqual(subprocess.run(["git", "branch", "--show-current"], cwd=wt, capture_output=True,
                                        text=True).stdout.strip(), "slow/t-three")
        self.assertEqual((wt / "where.txt").read_text().strip(), str(wt))     # setup cwd = code worktree
        self.assertIn("(in progress: slow/t-three)", (self.root / "TASKS.md").read_text())
        self.assertIn(f"cd {wt} && (make test) && ", out)
        self.assertFalse((self.root / ".worktrees").exists())                  # nothing in the private repo

    def test_setup_in_code_worktree(self):
        wt = self.add_wt()
        code, out, err = self.wf("setup", project=False, cwd=wt)
        self.assertEqual(code, 0, err)
        self.assertEqual((wt / "where.txt").read_text().strip(), str(wt))

    def env(self, name, pid):       # copy of tests/test_claims.py ClaimTest.env
        sock = self.root / f"{name}.sock"
        sock.write_text("")
        return {"CLAUDE_CODE_MESSAGING_SOCKET": str(sock), "CLAUDE_PID": str(pid), "CLAUDE_CODE_SESSION_ID": name}

    def test_next_advice_names_wf_start_in_code_repo(self):
        # pattern: tests/test_claims.py::test_next_says_worktree_mode_when_two_sessions_live
        son, me = self.env("s", os.getppid()), self.env("o", os.getpid())
        self.wf("next", "--lane", "slow", "--as", "sonnet", "--brief", env=son)
        code, out, err = self.wf("next", "--lane", "fast", "--as", "opus", env=me)
        self.assertIn(f"  wf start <task> --worktree {self.code / '.worktrees' / 'fast'} --branch fast/<task>  "
                      f"(run in {self.root}; wf there writes this TASKS.md)\n", out)