param(
    [string] $ApiExecutablePath,
    [string] $ApiContentRoot
)

$ErrorActionPreference = 'Stop'

$workspaceRoot = Split-Path -Parent $PSScriptRoot
$apiExecutable = if ([string]::IsNullOrWhiteSpace($ApiExecutablePath)) {
    Join-Path $workspaceRoot 'src/Jiaowu.Api/bin/Debug/net10.0/Jiaowu.Api.exe'
}
else {
    [System.IO.Path]::GetFullPath($ApiExecutablePath, $workspaceRoot)
}
$apiWorkingDirectory = if ([string]::IsNullOrWhiteSpace($ApiContentRoot)) {
    Join-Path $workspaceRoot 'src/Jiaowu.Api'
}
else {
    [System.IO.Path]::GetFullPath($ApiContentRoot, $workspaceRoot)
}
$stdoutPath = Join-Path $env:TEMP 'jiaowu-api-smoke.out.log'
$stderrPath = Join-Path $env:TEMP 'jiaowu-api-smoke.err.log'
$env:ASPNETCORE_ENVIRONMENT = 'Development'
$env:ASPNETCORE_URLS = 'http://localhost:5255'
$startParameters = @{
    FilePath               = $apiExecutable
    WorkingDirectory       = $apiWorkingDirectory
    WindowStyle            = 'Hidden'
    RedirectStandardOutput = $stdoutPath
    RedirectStandardError  = $stderrPath
    PassThru               = $true
}
$process = Start-Process @startParameters

try {
    $healthy = $false
    for ($attempt = 0; $attempt -lt 30; $attempt++) {
        Start-Sleep -Milliseconds 500
        try {
            $health = Invoke-RestMethod -Uri 'http://localhost:5255/health' -TimeoutSec 2
            $healthy = $true
            break
        }
        catch {
            # The API may still be starting.
        }
    }

    if (-not $healthy) {
        Get-Content -LiteralPath $stdoutPath -ErrorAction SilentlyContinue
        Get-Content -LiteralPath $stderrPath -ErrorAction SilentlyContinue
        throw 'API did not become healthy.'
    }

    $loginBody = @{
        userName = 'admin'
        password = 'Admin@123456'
    } | ConvertTo-Json
    $loginParameters = @{
        Method      = 'Post'
        Uri         = 'http://localhost:5255/api/auth/login'
        ContentType = 'application/json'
        Body        = $loginBody
    }
    $login = Invoke-RestMethod @loginParameters
    $headers = @{ Authorization = "Bearer $($login.token)" }
    $dashboard = Invoke-RestMethod -Uri 'http://localhost:5255/api/dashboard' -Headers $headers
    $campuses = Invoke-RestMethod -Uri 'http://localhost:5255/api/base-data/campuses' -Headers $headers
    $classes = Invoke-RestMethod -Uri 'http://localhost:5255/api/base-data/classes' -Headers $headers
    $counselors = Invoke-RestMethod -Uri 'http://localhost:5255/api/base-data/counselors' -Headers $headers
    $assignedClassCount = @($classes | Where-Object {
        $null -ne $_.counselorUserId -and
        @($counselors).id -contains $_.counselorUserId
    }).Count
    if ($assignedClassCount -lt 1) {
        throw 'No administrative class is linked to a counselor account.'
    }
    $teachers = Invoke-RestMethod -Uri 'http://localhost:5255/api/personnel/teachers?page=1&pageSize=10' -Headers $headers
    $students = Invoke-RestMethod -Uri 'http://localhost:5255/api/personnel/students?page=1&pageSize=10' -Headers $headers
    $courses = Invoke-RestMethod -Uri 'http://localhost:5255/api/courses?page=1&pageSize=10' -Headers $headers
    $curriculumPlans = Invoke-RestMethod -Uri 'http://localhost:5255/api/curriculum-plans?page=1&pageSize=10' -Headers $headers
    if ($curriculumPlans.total -gt 0) {
        $curriculumDetail = Invoke-RestMethod `
            -Uri "http://localhost:5255/api/curriculum-plans/$($curriculumPlans.items[0].id)" `
            -Headers $headers
    }
    $teachingTasks = Invoke-RestMethod -Uri 'http://localhost:5255/api/teaching-tasks?page=1&pageSize=10' -Headers $headers
    $schedulePlans = Invoke-RestMethod -Uri 'http://localhost:5255/api/schedules/plans' -Headers $headers
    if (@($schedulePlans).Count -gt 0) {
        $scheduleDetail = Invoke-RestMethod `
            -Uri "http://localhost:5255/api/schedules/plans/$($schedulePlans[0].id)" `
            -Headers $headers
    }
    $selectionRounds = Invoke-RestMethod `
        -Uri 'http://localhost:5255/api/course-selections/rounds' `
        -Headers $headers
    if (@($selectionRounds).Count -lt 1) {
        throw 'Development course-selection round was not seeded.'
    }
    $activeSelectionRound = @($selectionRounds) |
        Where-Object { $_.isAvailableNow } |
        Select-Object -First 1
    if ($null -eq $activeSelectionRound) {
        throw 'No course-selection round is open for the smoke test.'
    }
    $selectionOfferings = Invoke-RestMethod `
        -Uri "http://localhost:5255/api/course-selections/rounds/$($activeSelectionRound.id)/offerings" `
        -Headers $headers
    if (@($selectionOfferings).Count -lt 1) {
        throw 'Development course-selection offering was not seeded.'
    }
    $managedUsers = Invoke-RestMethod -Uri 'http://localhost:5255/api/users' -Headers $headers
    $teacherAccount = @($managedUsers) |
        Where-Object { $_.userName -eq 'teacher' } |
        Select-Object -First 1
    if ($null -eq $teacherAccount) {
        throw 'Development teacher account was not seeded.'
    }
    $teacherAccessBody = @{
        staffNumber = $teacherAccount.staffNumber
        collegeId = $teacherAccount.collegeId
        roles = @('Teacher')
    } | ConvertTo-Json
    Invoke-RestMethod `
        -Method Put `
        -Uri "http://localhost:5255/api/users/$($teacherAccount.id)/roles" `
        -Headers $headers `
        -ContentType 'application/json' `
        -Body $teacherAccessBody

    $scopeScenarios = @(
        @{
            UserName = 'college'; Password = 'College@123456'; Scope = 'College'
            Teachers = 2; Students = 3; Courses = 3
        },
        @{
            UserName = 'counselor'; Password = 'Counselor@123456'; Scope = 'Class'
            Teachers = 1; Students = 3; Courses = 1
        },
        @{
            UserName = 'teacher'; Password = 'Teacher@123456'; Scope = 'Self'
            Teachers = 1; Students = 3; Courses = 1
        },
        @{
            UserName = 'student'; Password = 'Student@123456'; Scope = 'Self'
            Teachers = 0; Students = 1; Courses = 1
        }
    )
    $scopeChecks = foreach ($scenario in $scopeScenarios) {
        $scenarioLoginBody = @{
            userName = $scenario.UserName
            password = $scenario.Password
        } | ConvertTo-Json
        $scenarioLogin = Invoke-RestMethod `
            -Method Post `
            -Uri 'http://localhost:5255/api/auth/login' `
            -ContentType 'application/json' `
            -Body $scenarioLoginBody
        $scenarioHeaders = @{ Authorization = "Bearer $($scenarioLogin.token)" }
        $scenarioTeachers = Invoke-RestMethod `
            -Uri 'http://localhost:5255/api/personnel/teachers?page=1&pageSize=10' `
            -Headers $scenarioHeaders
        $scenarioStudents = Invoke-RestMethod `
            -Uri 'http://localhost:5255/api/personnel/students?page=1&pageSize=10' `
            -Headers $scenarioHeaders
        $scenarioCourses = Invoke-RestMethod `
            -Uri 'http://localhost:5255/api/courses?page=1&pageSize=10' `
            -Headers $scenarioHeaders
        if ($scenarioLogin.user.effectiveDataScope -ne $scenario.Scope -or
            $scenarioTeachers.total -ne $scenario.Teachers -or
            $scenarioStudents.total -ne $scenario.Students -or
            $scenarioCourses.total -ne $scenario.Courses) {
            throw ("Data-scope check failed for {0}: scope={1}, teachers={2}, students={3}, courses={4}." -f
                $scenario.UserName,
                $scenarioLogin.user.effectiveDataScope,
                $scenarioTeachers.total,
                $scenarioStudents.total,
                $scenarioCourses.total)
        }
        "$($scenario.UserName):$($scenario.Scope)"
    }

    $studentLoginBody = @{
        userName = 'student'
        password = 'Student@123456'
    } | ConvertTo-Json
    $studentLogin = Invoke-RestMethod `
        -Method Post `
        -Uri 'http://localhost:5255/api/auth/login' `
        -ContentType 'application/json' `
        -Body $studentLoginBody
    $studentHeaders = @{ Authorization = "Bearer $($studentLogin.token)" }
    $studentOptions = Invoke-RestMethod `
        -Uri "http://localhost:5255/api/course-selections/student/options?roundId=$($activeSelectionRound.id)" `
        -Headers $studentHeaders
    $studentOffering = @($studentOptions.offerings) | Select-Object -First 1
    if ($null -eq $studentOffering) {
        throw 'Student has no eligible course-selection offering.'
    }
    if ($studentOffering.enrollmentStatus -ne 'Enrolled') {
        $enrollmentBody = @{ offeringId = $studentOffering.id } | ConvertTo-Json
        Invoke-RestMethod `
            -Method Post `
            -Uri 'http://localhost:5255/api/course-selections/student/enrollments' `
            -Headers $studentHeaders `
            -ContentType 'application/json' `
            -Body $enrollmentBody |
            Out-Null
    }
    $studentEnrollments = Invoke-RestMethod `
        -Uri "http://localhost:5255/api/course-selections/student/enrollments?academicTermId=$($activeSelectionRound.academicTermId)" `
        -Headers $studentHeaders
    $activeEnrollments = @($studentEnrollments) |
        Where-Object { $_.status -eq 'Enrolled' }
    if ($activeEnrollments.Count -lt 1) {
        throw 'Student course enrollment was not persisted.'
    }
    $selectionRoster = Invoke-RestMethod `
        -Uri "http://localhost:5255/api/course-selections/offerings/$($studentOffering.id)/roster" `
        -Headers $headers
    if ($selectionRoster.enrolledCount -lt 1) {
        throw 'Course-selection roster did not include the selected student.'
    }

    $frontend = Invoke-WebRequest -Uri 'http://localhost:5255/' -TimeoutSec 5
    $spaFallback = Invoke-WebRequest -Uri 'http://localhost:5255/base-data' -TimeoutSec 5
    $unknownApiParameters = @{
        Uri                = 'http://localhost:5255/api/does-not-exist'
        SkipHttpErrorCheck = $true
        TimeoutSec         = 5
    }
    $unknownApi = Invoke-WebRequest @unknownApiParameters

    [pscustomobject]@{
        Health       = $health.status
        Database     = $health.database
        User         = $login.user.displayName
        Term         = $dashboard.currentTerm.name
        Campuses     = @($campuses).Count
        CounselorAssignments = $assignedClassCount
        Teachers     = $teachers.total
        Students     = $students.total
        Courses      = $courses.total
        Plans        = $curriculumPlans.total
        PlanModules  = if ($null -ne $curriculumDetail) { @($curriculumDetail.modules).Count } else { 0 }
        TeachingTasks = $teachingTasks.total
        Schedules     = @($schedulePlans).Count
        ScheduleEntries = if ($null -ne $scheduleDetail) { @($scheduleDetail.entries).Count } else { 0 }
        SelectionRounds = @($selectionRounds).Count
        SelectionOfferings = @($selectionOfferings).Count
        StudentEnrollments = $activeEnrollments.Count
        RosterStudents = $selectionRoster.enrolledCount
        AccessUpdate  = $true
        ScopeChecks   = $scopeChecks -join ', '
        StaticIndex  = $frontend.Content.Contains('明序教务管理系统')
        SpaFallback  = $spaFallback.StatusCode
        ApiNotFound  = $unknownApi.StatusCode
    } | Format-List
}
finally {
    if (-not $process.HasExited) {
        Stop-Process -Id $process.Id -Force
    }
}