package skiprules

import (
	"context"
	"strings"
	"testing"
	"time"

	"github.com/spf13/cobra"

	"git.avsdev.uk/Go/job-search/internal/cli"
	"git.avsdev.uk/Go/job-search/internal/cli/cmdtest"
	"git.avsdev.uk/Go/job-search/internal/store"
	"git.avsdev.uk/Go/job-search/internal/types"
)

// Run with: go test -tags sqlite_fts5 ./...
//
// These tests run the skip-rules commands as a user would, through a root
// command like job-search's (see cmdtest).

// conf is a config.yaml with a database and rules file in the test's
// directory.
const conf = "logging:\n  level: info\n" +
	"database:\n  file: ./test.db\n" +
	"sources:\n  skip_rules_file: ./rules.json\n"

// rules skips buyer X's opportunities.
const rules = `[{"comment": "buyer X", "active": true,
	"rules": [{"rule_type": "buyer", "values": ["X"]}]}]`

func newRoot() *cobra.Command {
	opts := &cli.Options{}
	return cmdtest.NewRoot(opts, NewCommand(opts))
}

// storeOpportunities creates test.db holding ocds-1 (buyer X), ocds-2 (buyer
// Y) and ocds-3 (buyer X, already skipped and interested).
func storeOpportunities(t *testing.T) {
	t.Helper()
	ctx := context.Background()
	s, err := store.Open(ctx, "test.db", store.WithAutoMigrate())
	if err != nil {
		t.Fatal(err)
	}
	defer s.Close()

	buyers := []string{"X", "Y", "X"}
	for i, buyer := range buyers {
		uuid := "ocds-" + string(rune('1'+i))
		_, err := s.SaveOpportunity(ctx, &types.Opportunity{
			UUID:     uuid,
			UUIDType: "ocid",
			Title:    "Opportunity " + uuid,
			BuyerID:  buyer,
			Releases: []types.OpportunityRelease{
				{
					ReleaseID:   "r1",
					ReleaseDate: time.Date(2026, 10, 1+i, 12, 0, 0, 0, time.UTC),
					JSON:        "{}",
				},
			},
		})
		if err != nil {
			t.Fatal(err)
		}
	}
	err = s.SetMarks(ctx, types.OpportunityMarks{
		UUID:       "ocds-3",
		Skipped:    true,
		Interested: true,
	})
	if err != nil {
		t.Fatal(err)
	}
}

// marks returns the stored marks of uuid.
func marks(t *testing.T, uuid string) types.OpportunityMarks {
	t.Helper()
	s, err := store.Open(context.Background(), "test.db")
	if err != nil {
		t.Fatal(err)
	}
	defer s.Close()
	opportunity, err := s.GetOpportunity(context.Background(), uuid)
	if err != nil {
		t.Fatal(err)
	}
	return opportunity.Marks
}

func TestCheck(t *testing.T) {
	cmdtest.Setup(t, conf)
	cmdtest.WriteFile(t, "rules.json", rules)
	cmdtest.WriteFile(t, "other.json", `[]`)
	cmdtest.WriteFile(t, "bad.json", `[{"comment": "c"}]`)

	out := cmdtest.MustRun(t, newRoot, "skip-rules", "check")
	cmdtest.Contains(t, out, "./rules.json is valid: 1 filters (1 active)")

	out = cmdtest.MustRun(t, newRoot, "skip-rules", "check", "other.json")
	cmdtest.Contains(t, out, "other.json is valid: 0 filters (0 active)")

	_, err := cmdtest.Run(t, newRoot, "", "skip-rules", "check", "bad.json")
	cmdtest.ErrContains(t, err, `bad.json: filter 1 ("c"): skiprules: active`)

	_, err = cmdtest.Run(t, newRoot, "", "skip-rules", "check", "none.json")
	cmdtest.ErrContains(t, err, "none.json")
}

func TestCheckNoFile(t *testing.T) {
	cmdtest.Setup(t, "logging:\n  level: info\n")
	_, err := cmdtest.Run(t, newRoot, "", "skip-rules", "check")
	cmdtest.ErrContains(t, err, "sources.skip_rules_file is not set")
}

func TestApplyDryRun(t *testing.T) {
	cmdtest.Setup(t, conf)
	cmdtest.WriteFile(t, "rules.json", rules)
	storeOpportunities(t)

	out := cmdtest.MustRun(t, newRoot, "skip-rules", "apply", "--dry-run")
	cmdtest.Contains(
		t,
		out,
		"ocds-1  buyer X  Opportunity ocds-1",
		"1 opportunities would be skipped (dry run)",
	)
	if strings.Contains(out, "ocds-2") || strings.Contains(out, "ocds-3") {
		t.Errorf("listed a non-match or an already skipped one:\n%s", out)
	}
	if marks(t, "ocds-1").Skipped {
		t.Error("a dry run skipped ocds-1")
	}
}

// apply sets only Skipped, on the matches not yet skipped, and leaves the
// other marks alone.
func TestApply(t *testing.T) {
	cmdtest.Setup(t, conf)
	cmdtest.WriteFile(t, "rules.json", rules)
	storeOpportunities(t)

	out := cmdtest.MustRun(t, newRoot, "skip-rules", "apply")
	cmdtest.Contains(t, out, "ocds-1  buyer X", "Skipped 1 opportunities")

	if !marks(t, "ocds-1").Skipped {
		t.Error("ocds-1 wasn't skipped")
	}
	if marks(t, "ocds-2").Skipped {
		t.Error("ocds-2 (buyer Y) was skipped")
	}
	if got := marks(t, "ocds-3"); !got.Skipped || !got.Interested {
		t.Errorf("ocds-3's marks changed: %+v", got)
	}

	out = cmdtest.MustRun(t, newRoot, "skip-rules", "apply")
	cmdtest.Contains(t, out, "Skipped 0 opportunities")
}

// A rules file given on the command line is used instead of the
// configured one.
func TestApplyGivenFile(t *testing.T) {
	cmdtest.Setup(t, conf)
	cmdtest.WriteFile(t, "rules.json", rules)
	cmdtest.WriteFile(t, "y.json", strings.ReplaceAll(rules, `"X"`, `"Y"`))
	storeOpportunities(t)

	out := cmdtest.MustRun(t, newRoot, "skip-rules", "apply", "y.json")
	cmdtest.Contains(t, out, "ocds-2", "Skipped 1 opportunities")
	if !marks(t, "ocds-2").Skipped || marks(t, "ocds-1").Skipped {
		t.Error("y.json's rules weren't the ones applied")
	}
}