// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package devtest

import (
	"fmt"
	mathRand "math/rand/v2"
	"net/http"
	"slices"
	"strconv"
	"strings"
	"time"

	actions_model "code.gitea.io/gitea/models/actions"
	user_model "code.gitea.io/gitea/models/user"
	"code.gitea.io/gitea/modules/setting"
	"code.gitea.io/gitea/modules/timeutil"
	"code.gitea.io/gitea/modules/util"
	"code.gitea.io/gitea/modules/web"
	"code.gitea.io/gitea/routers/web/repo/actions"
	"code.gitea.io/gitea/services/context"
)

type generateMockStepsLogOptions struct {
	mockCountFirst   int
	mockCountGeneral int
	groupRepeat      int
}

func generateMockStepsLog(logCur actions.LogCursor, opts generateMockStepsLogOptions) (stepsLog []*actions.ViewStepLog) {
	var mockedLogs []string
	mockedLogs = append(mockedLogs, "::group::test group for: step={step}, cursor={cursor}")
	mockedLogs = append(mockedLogs, slices.Repeat([]string{"in group msg for: step={step}, cursor={cursor}"}, opts.groupRepeat)...)
	mockedLogs = append(mockedLogs, "::endgroup::")
	mockedLogs = append(mockedLogs,
		"message for: step={step}, cursor={cursor}",
		"message for: step={step}, cursor={cursor}",
		"##[group]test group for: step={step}, cursor={cursor}",
		"in group msg for: step={step}, cursor={cursor}",
		"##[endgroup]",
		"::error::mock error for: step={step}, cursor={cursor}",
		"::warning::mock warning for: step={step}, cursor={cursor}",
		"::notice::mock notice for: step={step}, cursor={cursor}",
		"::debug::mock debug for: step={step}, cursor={cursor}",
	)
	// usually the cursor is the "file offset", but here we abuse it as "line number" to make the mock easier, intentionally
	cur := logCur.Cursor
	// for the first batch, return as many as possible to test the auto-expand and auto-scroll
	mockCount := util.Iif(logCur.Cursor == 0, opts.mockCountFirst, opts.mockCountGeneral)
	for range mockCount {
		logStr := mockedLogs[int(cur)%len(mockedLogs)]
		cur++
		logStr = strings.ReplaceAll(logStr, "{step}", strconv.Itoa(logCur.Step))
		logStr = strings.ReplaceAll(logStr, "{cursor}", strconv.FormatInt(cur, 10))
		stepsLog = append(stepsLog, &actions.ViewStepLog{
			Step:    logCur.Step,
			Cursor:  cur,
			Started: time.Now().Unix() - 1,
			Lines: []*actions.ViewStepLogLine{
				{Index: cur, Message: logStr, Timestamp: float64(time.Now().UnixNano()) / float64(time.Second)},
			},
		})
	}
	return stepsLog
}

func MockActionsView(ctx *context.Context) {
	if runID := ctx.PathParamInt64("run"); runID == 0 {
		ctx.Redirect("/repo-action-view/runs/10")
		return
	}
	ctx.Data["JobID"] = ctx.PathParamInt64("job")
	ctx.Data["ActionsViewURL"] = ctx.Req.URL.Path
	ctx.HTML(http.StatusOK, "devtest/repo-action-view")
}

func MockActionsRunsJobs(ctx *context.Context) {
	runID := ctx.PathParamInt64("run")
	attemptID := ctx.PathParamInt64("attempt")

	alignTime := func(v, unit int64) int64 {
		return (v + unit) / unit * unit
	}
	resp := &actions.ViewResponse{}
	resp.State.Run.RepoID = 12345
	resp.State.Run.TitleHTML = `mock run title <a href="/">link</a>`
	resp.State.Run.Link = setting.AppSubURL + "/devtest/repo-action-view/runs/" + strconv.FormatInt(runID, 10)
	resp.State.Run.CanDeleteArtifact = true
	resp.State.Run.WorkflowID = "workflow-id"
	resp.State.Run.WorkflowLink = "./workflow-link"
	resp.State.Run.TriggerEvent = "push"
	resp.State.Run.Commit = actions.ViewCommit{
		ShortSha: "ccccdddd",
		Link:     "./commit-link",
		Pusher: actions.ViewUser{
			DisplayName: "pusher user",
			Link:        "./pusher-link",
		},
		Branch: actions.ViewBranch{
			Name:      "commit-branch",
			Link:      "./branch-link",
			IsDeleted: false,
		},
	}
	now := time.Now()
	currentAttemptNum := int64(1)
	if attemptID > 0 {
		currentAttemptNum = attemptID
	}
	user2 := &user_model.User{Name: "user2"}
	user3 := &user_model.User{Name: "user3"}
	attempts := []*actions_model.ActionRunAttempt{{
		Attempt:       1,
		Status:        actions_model.StatusSuccess,
		Created:       timeutil.TimeStamp(now.Add(-time.Hour).Unix()),
		TriggerUserID: 2,
		TriggerUser:   user2,
	}}
	if runID == 10 {
		attempts = []*actions_model.ActionRunAttempt{
			{
				Attempt:       3,
				Status:        actions_model.StatusSuccess,
				Created:       timeutil.TimeStamp(alignTime(now.Add(-time.Hour).Unix(), 3600)),
				TriggerUserID: 2,
				TriggerUser:   user2,
			},
			{
				Attempt:       2,
				Status:        actions_model.StatusFailure,
				Created:       timeutil.TimeStamp(alignTime(now.Add(-2*time.Hour).Unix(), 3600)),
				TriggerUserID: 1,
				TriggerUser:   user3,
			},
			{
				Attempt:       1,
				Status:        actions_model.StatusSuccess,
				Created:       timeutil.TimeStamp(alignTime(now.Add(-3*time.Hour).Unix(), 3600)),
				TriggerUserID: 2,
				TriggerUser:   user2,
			},
		}
		if attemptID == 0 {
			currentAttemptNum = 3
		}
	}

	latestAttempt := attempts[0]
	resp.State.Run.RunAttempt = currentAttemptNum
	resp.State.Run.Done = latestAttempt.Status.IsDone()
	resp.State.Run.Status = latestAttempt.Status.String()
	resp.State.Run.Duration = "1h 23m 45s"
	resp.State.Run.TriggeredAt = latestAttempt.Created.AsTime().Unix()
	resp.State.Run.ViewLink = resp.State.Run.Link
	for _, attempt := range attempts {
		link := resp.State.Run.Link
		if attempt.Attempt != latestAttempt.Attempt {
			link = fmt.Sprintf("%s/attempts/%d", resp.State.Run.Link, attempt.Attempt)
		}
		current := attempt.Attempt == currentAttemptNum
		if current {
			resp.State.Run.Status = attempt.Status.String()
			resp.State.Run.Done = attempt.Status.IsDone()
			resp.State.Run.TriggeredAt = attempt.Created.AsTime().Unix()
			if attempt.Attempt != latestAttempt.Attempt {
				resp.State.Run.ViewLink = link
			}
		}
		resp.State.Run.Attempts = append(resp.State.Run.Attempts, &actions.ViewRunAttempt{
			Attempt:         attempt.Attempt,
			Status:          attempt.Status.String(),
			Done:            attempt.Status.IsDone(),
			Link:            link,
			Current:         current,
			Latest:          attempt.Attempt == latestAttempt.Attempt,
			TriggeredAt:     attempt.Created.AsTime().Unix(),
			TriggerUserName: attempt.TriggerUser.GetDisplayName(),
			TriggerUserLink: attempt.TriggerUser.HomeLink(),
		})
	}
	isLatestAttempt := currentAttemptNum == latestAttempt.Attempt
	resp.State.Run.CanCancel = runID == 10 && isLatestAttempt
	resp.State.Run.CanApprove = runID == 20 && isLatestAttempt
	resp.State.Run.CanRerun = runID == 30 && isLatestAttempt
	resp.State.Run.CanRerunFailed = runID == 30 && isLatestAttempt

	resp.Artifacts = append(resp.Artifacts, &actions.ArtifactsViewItem{
		Name:        "artifact-a",
		Size:        100 * 1024,
		Status:      "expired",
		ExpiresUnix: alignTime(time.Now().Add(-24*time.Hour).Unix(), 3600),
	})
	resp.Artifacts = append(resp.Artifacts, &actions.ArtifactsViewItem{
		Name:        "artifact-b",
		Size:        1024 * 1024,
		Status:      "completed",
		ExpiresUnix: alignTime(time.Now().Add(24*time.Hour).Unix(), 3600),
	})
	resp.Artifacts = append(resp.Artifacts, &actions.ArtifactsViewItem{
		Name:        "artifact-very-loooooooooooooooooooooooooooooooooooooooooooooooooooooooong",
		Size:        100 * 1024,
		Status:      "expired",
		ExpiresUnix: alignTime(time.Now().Add(-24*time.Hour).Unix(), 3600),
	})
	resp.Artifacts = append(resp.Artifacts, &actions.ArtifactsViewItem{
		Name:        "artifact-really-loooooooooooooooooooooooooooooooooooooooooooooooooooooooong",
		Size:        1024 * 1024,
		Status:      "completed",
		ExpiresUnix: 0,
	})

	jobLink := func(jobID int64) string {
		return fmt.Sprintf("%s/jobs/%d", resp.State.Run.Link, jobID)
	}

	resp.State.Run.Jobs = append(resp.State.Run.Jobs, &actions.ViewJob{
		ID:       runID * 10,
		Link:     jobLink(runID * 10),
		JobID:    "job-100",
		Name:     "job 100 (testsubname)",
		Status:   actions_model.StatusRunning.String(),
		CanRerun: true,
		Duration: "1h23m45s",
	})
	resp.State.Run.Jobs = append(resp.State.Run.Jobs, &actions.ViewJob{
		ID:       runID*10 + 1,
		Link:     jobLink(runID*10 + 1),
		JobID:    "job-101",
		Name:     "job 101",
		Status:   actions_model.StatusWaiting.String(),
		CanRerun: false,
		Duration: "2h",
		Needs:    []string{"job-100"},
	})
	resp.State.Run.Jobs = append(resp.State.Run.Jobs, &actions.ViewJob{
		ID:       runID*10 + 2,
		Link:     jobLink(runID*10 + 2),
		JobID:    "job-102",
		Name:     "ULTRA LOOOOOOOOOOOONG job name 102 that exceeds the limit",
		Status:   actions_model.StatusFailure.String(),
		CanRerun: false,
		Duration: "3h",
		Needs:    []string{"job-100", "job-101"},
	})
	resp.State.Run.Jobs = append(resp.State.Run.Jobs, &actions.ViewJob{
		ID:       runID*10 + 3,
		Link:     jobLink(runID*10 + 3),
		JobID:    "job-103",
		Name:     "job 103",
		Status:   actions_model.StatusCancelled.String(),
		CanRerun: false,
		Duration: "2m",
		Needs:    []string{"job-100"},
	})

	// add more jobs to a run for UI testing
	if resp.State.Run.CanCancel {
		for i := range 10 {
			jobID := runID*1000 + int64(i)
			resp.State.Run.Jobs = append(resp.State.Run.Jobs, &actions.ViewJob{
				ID:       jobID,
				Link:     jobLink(jobID),
				JobID:    "job-dup-test-" + strconv.Itoa(i),
				Name:     "job dup test " + strconv.Itoa(i),
				Status:   actions_model.StatusSuccess.String(),
				CanRerun: false,
				Duration: "2m",
				Needs:    []string{"job-103", "job-101", "job-100"},
			})
		}
	}

	fillViewRunResponseCurrentJob(ctx, resp)
	ctx.JSON(http.StatusOK, resp)
}

func fillViewRunResponseCurrentJob(ctx *context.Context, resp *actions.ViewResponse) {
	jobID := ctx.PathParamInt64("job")
	if jobID == 0 {
		return
	}

	for _, job := range resp.State.Run.Jobs {
		if job.ID == jobID {
			resp.State.CurrentJob.Title = job.Name
			resp.State.CurrentJob.Detail = job.Status
			break
		}
	}

	req := web.GetForm(ctx).(*actions.ViewRequest)
	var mockLogOptions []generateMockStepsLogOptions
	resp.State.CurrentJob.Steps = append(resp.State.CurrentJob.Steps, &actions.ViewJobStep{
		Summary:  "step 0 (mock slow)",
		Duration: time.Hour.String(),
		Status:   actions_model.StatusRunning.String(),
	})
	mockLogOptions = append(mockLogOptions, generateMockStepsLogOptions{mockCountFirst: 30, mockCountGeneral: 1, groupRepeat: 3})

	resp.State.CurrentJob.Steps = append(resp.State.CurrentJob.Steps, &actions.ViewJobStep{
		Summary:  "step 1 (mock fast)",
		Duration: time.Hour.String(),
		Status:   actions_model.StatusRunning.String(),
	})
	mockLogOptions = append(mockLogOptions, generateMockStepsLogOptions{mockCountFirst: 30, mockCountGeneral: 3, groupRepeat: 20})

	resp.State.CurrentJob.Steps = append(resp.State.CurrentJob.Steps, &actions.ViewJobStep{
		Summary:  "step 2 (mock error)",
		Duration: time.Hour.String(),
		Status:   actions_model.StatusRunning.String(),
	})
	mockLogOptions = append(mockLogOptions, generateMockStepsLogOptions{mockCountFirst: 30, mockCountGeneral: 3, groupRepeat: 3})

	if len(req.LogCursors) == 0 {
		return
	}

	resp.Logs.StepsLog = []*actions.ViewStepLog{}
	doSlowResponse := false
	doErrorResponse := false
	for _, logCur := range req.LogCursors {
		if !logCur.Expanded {
			continue
		}
		doSlowResponse = doSlowResponse || logCur.Step == 0
		doErrorResponse = doErrorResponse || logCur.Step == 2
		resp.Logs.StepsLog = append(resp.Logs.StepsLog, generateMockStepsLog(logCur, mockLogOptions[logCur.Step])...)
	}
	if doErrorResponse {
		if mathRand.Float64() > 0.5 {
			ctx.HTTPError(http.StatusInternalServerError, "devtest mock error response")
			return
		}
	}
	if doSlowResponse {
		time.Sleep(time.Duration(3000) * time.Millisecond)
	} else {
		time.Sleep(time.Duration(100) * time.Millisecond) // actually, frontend reload every 1 second, any smaller delay is fine
	}
}